/* ==========================================================================
   WPI University — Design System
   Palette is sampled directly from the Wholesale Payments logo and used only
   as low-alpha tints, hairlines and micro-gradients. No large colour fields.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens
   -------------------------------------------------------------------------- */
:root {
  /* Brand — sampled from assets/img/wholesale-payments-logo.png */
  --navy:  #00125e;
  --blue:  #00a3e6;
  --green: #00c776;
  --mint:  #50e56f;
  --slate: #aaafb5;

  --navy-rgb:  0, 18, 94;
  --blue-rgb:  0, 163, 230;
  --green-rgb: 0, 199, 118;
  --mint-rgb:  80, 229, 111;
  --slate-rgb: 170, 175, 181;

  /* Surfaces */
  --bg:            #fbfbfd;
  --bg-elevated:   #ffffff;
  --bg-sunken:     #f4f5f8;
  --bg-tint:       rgba(var(--navy-rgb), 0.022);
  --surface-glass: rgba(255, 255, 255, 0.72);

  /* Ink */
  --ink:        #0a1030;
  --ink-strong: var(--navy);
  --ink-muted:  #5b6478;
  --ink-faint:  #8b93a5;

  /* Lines */
  --line:        rgba(var(--navy-rgb), 0.08);
  --line-strong: rgba(var(--navy-rgb), 0.14);
  --line-faint:  rgba(var(--navy-rgb), 0.05);

  /* Shadows — soft, wide, low opacity */
  --shadow-xs: 0 1px 2px rgba(var(--navy-rgb), 0.04);
  --shadow-sm: 0 1px 2px rgba(var(--navy-rgb), 0.04), 0 2px 8px rgba(var(--navy-rgb), 0.04);
  --shadow-md: 0 2px 4px rgba(var(--navy-rgb), 0.04), 0 8px 24px rgba(var(--navy-rgb), 0.07);
  --shadow-lg: 0 4px 8px rgba(var(--navy-rgb), 0.05), 0 20px 48px rgba(var(--navy-rgb), 0.10);
  --shadow-xl: 0 8px 16px rgba(var(--navy-rgb), 0.06), 0 32px 80px rgba(var(--navy-rgb), 0.16);

  /* Radii */
  --r-xs: 6px;
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-pill: 999px;

  /* Type — Apple system stack first, Inter as the cross-platform stand-in */
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
          "Inter var", "Inter", "Helvetica Neue", "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", SFMono-Regular, "JetBrains Mono", Menlo, monospace;

  /* Motion */
  --ease:        cubic-bezier(0.32, 0.72, 0, 1);
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t-fast: 160ms;
  --t-mid:  280ms;
  --t-slow: 520ms;

  /* Layout */
  --nav-h: 60px;
  --page-max: 1180px;
  --gutter: 24px;
}

:root[data-theme="dark"] {
  --bg:            #07080f;
  --bg-elevated:   #0f1220;
  --bg-sunken:     #0a0c17;
  --bg-tint:       rgba(var(--blue-rgb), 0.03);
  --surface-glass: rgba(15, 18, 32, 0.72);

  --ink:        #eef1f8;
  --ink-strong: #ffffff;
  --ink-muted:  #a3abc0;
  --ink-faint:  #6f7891;

  --line:        rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.16);
  --line-faint:  rgba(255, 255, 255, 0.055);

  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 4px 8px rgba(0, 0, 0, 0.4), 0 20px 48px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 8px 16px rgba(0, 0, 0, 0.5), 0 32px 80px rgba(0, 0, 0, 0.6);
}

/* --------------------------------------------------------------------------
   2. Reset
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 24px);
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "cv02", "cv03", "cv04", "ss01";
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* The one place brand colour lives at full strength: a 2px hairline that
   traces the top of the document, echoing the logo's three bars. */
body::before {
  content: "";
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 200;
  background: linear-gradient(90deg,
    var(--blue) 0%, var(--blue) 18%,
    var(--green) 42%, var(--mint) 66%,
    rgba(var(--navy-rgb), 0.55) 100%);
  opacity: 0.85;
  pointer-events: none;
}

img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4, h5, h6, p, figure, ul, ol, dl { margin: 0; }
ul, ol { padding: 0; list-style: none; }
table { border-collapse: collapse; width: 100%; }

::selection { background: rgba(var(--blue-rgb), 0.18); color: var(--ink-strong); }

:focus-visible {
  outline: 2px solid rgba(var(--blue-rgb), 0.85);
  outline-offset: 2px;
  border-radius: var(--r-xs);
}

/* Scrollbar — thin, neutral, brand only on the thumb hover */
* { scrollbar-width: thin; scrollbar-color: var(--line-strong) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: transparent; }
*::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border: 3px solid transparent;
  border-radius: var(--r-pill);
  background-clip: content-box;
}
*::-webkit-scrollbar-thumb:hover { background: rgba(var(--blue-rgb), 0.35); background-clip: content-box; }

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */
.display {
  font-size: clamp(2.5rem, 1.4rem + 4.4vw, 4.25rem);
  line-height: 1.03;
  letter-spacing: -0.035em;
  font-weight: 700;
  color: var(--ink-strong);
}
.h1 { font-size: clamp(1.9rem, 1.3rem + 2.2vw, 2.75rem); line-height: 1.1;  letter-spacing: -0.03em;  font-weight: 700; color: var(--ink-strong); }
.h2 { font-size: clamp(1.4rem, 1.1rem + 1.1vw, 1.9rem);  line-height: 1.18; letter-spacing: -0.024em; font-weight: 660; color: var(--ink-strong); }
.h3 { font-size: 1.2rem;   line-height: 1.3;  letter-spacing: -0.018em; font-weight: 640; color: var(--ink-strong); }
.h4 { font-size: 1.0rem;   line-height: 1.4;  letter-spacing: -0.012em; font-weight: 620; color: var(--ink-strong); }

.lede { font-size: clamp(1.02rem, 0.96rem + 0.35vw, 1.2rem); line-height: 1.6; color: var(--ink-muted); letter-spacing: -0.01em; }
.body { color: var(--ink-muted); }
.small { font-size: 0.875rem; line-height: 1.5; }
.tiny  { font-size: 0.78rem;  line-height: 1.45; }

.eyebrow {
  font-size: 0.72rem;
  font-weight: 620;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.numeric { font-variant-numeric: tabular-nums; font-feature-settings: "tnum"; }
.muted  { color: var(--ink-muted); }
.faint  { color: var(--ink-faint); }
.strong { color: var(--ink-strong); font-weight: 600; }

/* A single restrained gradient for one word per page, never a block */
.grad-text {
  background: linear-gradient(105deg, var(--navy) 8%, var(--blue) 54%, var(--green) 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
:root[data-theme="dark"] .grad-text {
  background: linear-gradient(105deg, #cfe4ff 4%, var(--blue) 46%, var(--mint) 96%);
  -webkit-background-clip: text;
  background-clip: text;
}

/* --------------------------------------------------------------------------
   4. Layout
   -------------------------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--page-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.wrap-wide { max-width: 1400px; }
.wrap-narrow { max-width: 760px; }

main { padding-top: var(--nav-h); min-height: 100vh; }

.section { padding-block: clamp(40px, 5vw, 72px); }
.section-tight { padding-block: clamp(28px, 3.4vw, 44px); }

.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(248px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
/* Content cards need more room than a stat tile — never squeeze past four up. */
.grid-cards { grid-template-columns: repeat(auto-fill, minmax(304px, 1fr)); }
.grid-cards > .card { display: flex; flex-direction: column; }
.card-foot { margin-top: auto; padding-top: 16px; }

.row { display: flex; align-items: center; gap: 12px; min-width: 0; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.col { display: flex; flex-direction: column; gap: 12px; }
.spacer { flex: 1 1 auto; }

.stack > * + * { margin-top: var(--stack-gap, 16px); }

/* --------------------------------------------------------------------------
   5. Navigation
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 120;
  display: flex;
  align-items: center;
  background: var(--surface-glass);
  -webkit-backdrop-filter: saturate(180%) blur(22px);
  backdrop-filter: saturate(180%) blur(22px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease),
              background var(--t-mid) var(--ease);
}
.nav.is-stuck {
  border-bottom-color: var(--line);
  box-shadow: 0 1px 24px rgba(var(--navy-rgb), 0.05);
}
.nav .wrap { display: flex; align-items: center; gap: 20px; max-width: 1400px; }

.brand { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
/* The lockup keeps the mark's blue/green bars intact in both themes and flips
   only the navy wordmark to white on dark. Gap ratio comes from the source art. */
.logo-lockup {
  display: inline-flex;
  align-items: center;
  gap: calc(var(--logo-h, 26px) * 0.1376);
  height: var(--logo-h, 26px);
  flex: none;
}
.logo-lockup img { height: 100%; width: auto; }
:root[data-theme="dark"] .logo-word { filter: brightness(0) invert(1); opacity: 0.94; }
.brand-divider {
  width: 1px; height: 20px;
  background: var(--line-strong);
}
.brand-sub {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink-muted);
  white-space: nowrap;
}

.nav-links { display: flex; align-items: center; gap: 2px; position: relative; }
.nav-link {
  position: relative;
  padding: 7px 13px;
  border-radius: var(--r-sm);
  font-size: 0.885rem;
  font-weight: 520;
  letter-spacing: -0.008em;
  color: var(--ink-muted);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
  white-space: nowrap;
}
.nav-link:hover { color: var(--ink-strong); background: rgba(var(--navy-rgb), 0.04); }
:root[data-theme="dark"] .nav-link:hover { background: rgba(255, 255, 255, 0.06); }
.nav-link[aria-current="page"] { color: var(--ink-strong); font-weight: 600; }
.nav-link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 13px; right: 13px; bottom: 1px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--blue), var(--green));
  animation: underline-in var(--t-mid) var(--ease-out) both;
}
@keyframes underline-in { from { transform: scaleX(0); opacity: 0; } to { transform: scaleX(1); opacity: 1; } }

.nav-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }

/* ⌘K trigger */
.search-trigger {
  display: flex; align-items: center; gap: 8px;
  height: 34px;
  padding: 0 8px 0 11px;
  min-width: 200px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: rgba(var(--navy-rgb), 0.028);
  color: var(--ink-faint);
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease);
}
:root[data-theme="dark"] .search-trigger { background: rgba(255, 255, 255, 0.045); }
.search-trigger:hover {
  border-color: rgba(var(--blue-rgb), 0.35);
  background: rgba(var(--blue-rgb), 0.05);
  color: var(--ink-muted);
}
.search-trigger .spacer { min-width: 12px; }
.search-trigger svg { width: 15px; height: 15px; flex: none; }

kbd {
  font-family: var(--font);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 5px;
  border: 1px solid var(--line);
  background: var(--bg-elevated);
  color: var(--ink-faint);
  line-height: 1.35;
}

.icon-btn {
  display: inline-grid; place-items: center;
  width: 34px; height: 34px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--ink-muted);
  cursor: pointer;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease), transform var(--t-fast) var(--ease-spring);
}
.icon-btn:hover {
  color: var(--ink-strong);
  border-color: rgba(var(--blue-rgb), 0.35);
  background: rgba(var(--blue-rgb), 0.06);
}
.icon-btn:active { transform: scale(0.93); }
.icon-btn svg { width: 17px; height: 17px; }

/* Avatar / user menu */
.usermenu { position: relative; }
.avatar {
  display: grid; place-items: center;
  width: 34px; height: 34px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background:
    linear-gradient(140deg, rgba(var(--blue-rgb), 0.16), rgba(var(--green-rgb), 0.16));
  color: var(--ink-strong);
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform var(--t-fast) var(--ease-spring), box-shadow var(--t-fast) var(--ease);
}
.avatar:hover { transform: scale(1.06); box-shadow: 0 0 0 3px rgba(var(--blue-rgb), 0.12); }
.avatar-lg { width: 60px; height: 60px; font-size: 1.25rem; }

.menu {
  position: absolute;
  top: calc(100% + 10px); right: 0;
  min-width: 232px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.97);
  transform-origin: top right;
  transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease-out),
              visibility var(--t-fast);
  z-index: 130;
}
.menu.open { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.menu-head { padding: 10px 12px 8px; border-bottom: 1px solid var(--line-faint); margin-bottom: 4px; }
.menu-item {
  display: flex; align-items: center; gap: 10px;
  width: 100%;
  padding: 8px 12px;
  border: 0;
  border-radius: var(--r-sm);
  background: transparent;
  font-size: 0.88rem;
  color: var(--ink-muted);
  cursor: pointer;
  text-align: left;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.menu-item:hover { background: rgba(var(--blue-rgb), 0.07); color: var(--ink-strong); }
.menu-item svg { width: 15px; height: 15px; opacity: 0.7; }

/* Mobile drawer */
.nav-toggle { display: none; }
.drawer {
  position: fixed; inset: 0;
  z-index: 140;
  visibility: hidden;
  pointer-events: none;
}
.drawer.open { visibility: visible; pointer-events: auto; }
.drawer-scrim {
  position: absolute; inset: 0;
  background: rgba(var(--navy-rgb), 0.28);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity var(--t-mid) var(--ease);
}
.drawer.open .drawer-scrim { opacity: 1; }
.drawer-panel {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: min(320px, 86vw);
  padding: 20px;
  background: var(--bg-elevated);
  border-left: 1px solid var(--line);
  box-shadow: var(--shadow-xl);
  transform: translateX(100%);
  transition: transform var(--t-mid) var(--ease-out);
  display: flex; flex-direction: column; gap: 6px;
  overflow-y: auto;
}
.drawer.open .drawer-panel { transform: translateX(0); }
.drawer-link {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px;
  border-radius: var(--r-md);
  font-size: 1rem;
  font-weight: 520;
  letter-spacing: -0.01em;
  color: var(--ink-muted);
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.drawer-link[aria-current="page"] {
  color: var(--ink-strong);
  font-weight: 600;
  background: rgba(var(--blue-rgb), 0.07);
}
.drawer-link:hover { background: rgba(var(--navy-rgb), 0.045); color: var(--ink-strong); }
.drawer-link svg { width: 18px; height: 18px; opacity: 0.65; }

/* --------------------------------------------------------------------------
   6. Command palette
   -------------------------------------------------------------------------- */
.palette {
  position: fixed; inset: 0;
  z-index: 200;
  display: grid;
  place-items: start center;
  padding-top: clamp(56px, 12vh, 132px);
  visibility: hidden;
  pointer-events: none;
}
.palette.open { visibility: visible; pointer-events: auto; }
.palette-scrim {
  position: absolute; inset: 0;
  background: rgba(var(--navy-rgb), 0.24);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  opacity: 0;
  transition: opacity var(--t-mid) var(--ease);
}
.palette.open .palette-scrim { opacity: 1; }
.palette-box {
  position: relative;
  width: min(620px, calc(100vw - 32px));
  max-height: min(560px, 70vh);
  display: flex; flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  opacity: 0;
  transform: translateY(-14px) scale(0.975);
  transition: opacity var(--t-mid) var(--ease), transform var(--t-mid) var(--ease-out);
}
.palette.open .palette-box { opacity: 1; transform: translateY(0) scale(1); }
.palette-input-row {
  display: flex; align-items: center; gap: 12px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--line-faint);
}
.palette-input-row svg { width: 18px; height: 18px; color: var(--ink-faint); flex: none; }
.palette-input {
  flex: 1;
  border: 0; background: transparent; outline: none;
  font-size: 1.02rem;
  letter-spacing: -0.012em;
}
.palette-input::placeholder { color: var(--ink-faint); }
.palette-results { overflow-y: auto; padding: 8px; scroll-behavior: smooth; }
.palette-group { padding: 10px 10px 4px; }
.palette-item {
  display: flex; align-items: center; gap: 12px;
  padding: 9px 12px;
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: background var(--t-fast) var(--ease);
}
/* .pi-icon is a small tinted glyph tile; the palette is just its first user. */
.pi-icon {
  display: grid; place-items: center;
  width: 28px; height: 28px; flex: none;
  border-radius: 8px;
  background: rgba(var(--blue-rgb), 0.09);
  color: #0086c4;
}
.pi-icon svg { width: 14px; height: 14px; }
.pi-icon.green { background: rgba(var(--green-rgb), 0.11); color: #009159; }
.pi-icon.navy  { background: rgba(var(--navy-rgb), 0.07); color: var(--navy); }
:root[data-theme="dark"] .pi-icon       { color: #6fd0ff; background: rgba(var(--blue-rgb), 0.14); }
:root[data-theme="dark"] .pi-icon.green { color: var(--mint); background: rgba(var(--green-rgb), 0.14); }
:root[data-theme="dark"] .pi-icon.navy  { background: rgba(255,255,255,0.08); color: #cfe4ff; }
.palette-item .pi-title { font-size: 0.92rem; font-weight: 520; letter-spacing: -0.01em; }
.palette-item .pi-sub { font-size: 0.76rem; color: var(--ink-faint); }
.palette-item[aria-selected="true"] { background: rgba(var(--blue-rgb), 0.09); }
.palette-item[aria-selected="true"] .pi-title { color: var(--ink-strong); font-weight: 600; }
.palette-empty { padding: 44px 20px; text-align: center; color: var(--ink-faint); font-size: 0.9rem; }
.palette-foot {
  display: flex; align-items: center; gap: 16px;
  padding: 9px 16px;
  border-top: 1px solid var(--line-faint);
  background: var(--bg-tint);
  font-size: 0.74rem;
  color: var(--ink-faint);
}

/* --------------------------------------------------------------------------
   7. Surfaces
   -------------------------------------------------------------------------- */
.card {
  position: relative;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
  transition: transform var(--t-mid) var(--ease-out), box-shadow var(--t-mid) var(--ease),
              border-color var(--t-mid) var(--ease);
}
.card-flat { box-shadow: none; }
.card-pad-sm { padding: 16px; }
.card-pad-lg { padding: clamp(24px, 3vw, 34px); }

a.card, .card-hover { cursor: pointer; }
a.card:hover, .card-hover:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(var(--blue-rgb), 0.24);
}

/* Top hairline that reveals on hover — the only per-card colour */
.card-accent::before {
  content: "";
  position: absolute;
  top: -1px; left: 20px; right: 20px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--blue), var(--green), var(--mint));
  opacity: 0;
  transform: scaleX(0.5);
  transition: opacity var(--t-mid) var(--ease), transform var(--t-mid) var(--ease-out);
}
a.card-accent:hover::before, .card-accent.card-hover:hover::before { opacity: 1; transform: scaleX(1); }

.panel {
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.panel-head {
  display: flex; align-items: center; gap: 12px;
  padding: 15px 20px;
  border-bottom: 1px solid var(--line-faint);
  background: var(--bg-tint);
}
.panel-body { padding: 20px; }
.panel-body-flush { padding: 0; }

.hairline { height: 1px; background: var(--line-faint); border: 0; margin: 0; }
.hairline-brand {
  height: 2px; border: 0; border-radius: 2px;
  background: linear-gradient(90deg, rgba(var(--blue-rgb), 0.55), rgba(var(--green-rgb), 0.45), transparent);
}

/* --------------------------------------------------------------------------
   8. Buttons, chips, badges
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 40px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  font-size: 0.9rem;
  font-weight: 560;
  letter-spacing: -0.008em;
  cursor: pointer;
  white-space: nowrap;
  transition: transform var(--t-fast) var(--ease-spring), box-shadow var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}
.btn:active { transform: scale(0.975); }
.btn svg { width: 16px; height: 16px; }

.btn-primary {
  background: var(--navy);
  color: #fff;
  box-shadow: 0 1px 2px rgba(var(--navy-rgb), 0.3), 0 6px 18px rgba(var(--navy-rgb), 0.18);
}
.btn-primary:hover { background: #001a7d; box-shadow: 0 2px 4px rgba(var(--navy-rgb), 0.3), 0 10px 26px rgba(var(--navy-rgb), 0.24); }
:root[data-theme="dark"] .btn-primary { background: #f2f5ff; color: #050a1f; box-shadow: 0 6px 22px rgba(0,0,0,0.55); }
:root[data-theme="dark"] .btn-primary:hover { background: #ffffff; }

.btn-secondary {
  background: var(--bg-elevated);
  border-color: var(--line-strong);
  color: var(--ink-strong);
  box-shadow: var(--shadow-xs);
}
.btn-secondary:hover { border-color: rgba(var(--blue-rgb), 0.42); background: rgba(var(--blue-rgb), 0.045); }

.btn-ghost { background: transparent; color: var(--ink-muted); }
.btn-ghost:hover { background: rgba(var(--navy-rgb), 0.05); color: var(--ink-strong); }
:root[data-theme="dark"] .btn-ghost:hover { background: rgba(255,255,255,0.07); }

.btn-sm { height: 32px; padding: 0 13px; font-size: 0.82rem; border-radius: var(--r-xs); }
.btn-sm svg { width: 14px; height: 14px; }
.btn-lg { height: 48px; padding: 0 26px; font-size: 0.98rem; border-radius: var(--r-md); }
.btn-block { width: 100%; }
.btn[disabled], .btn.is-disabled { opacity: 0.45; pointer-events: none; }

.chip {
  display: inline-flex; align-items: center; gap: 6px;
  height: 24px;
  padding: 0 10px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  background: rgba(var(--navy-rgb), 0.032);
  font-size: 0.74rem;
  font-weight: 560;
  letter-spacing: 0.002em;
  color: var(--ink-muted);
  white-space: nowrap;
}
:root[data-theme="dark"] .chip { background: rgba(255,255,255,0.05); }
.chip svg { width: 12px; height: 12px; flex: none; opacity: 0.75; }
.chip-blue  { background: rgba(var(--blue-rgb), 0.09);  border-color: rgba(var(--blue-rgb), 0.2);  color: #0079ac; }
.chip-green { background: rgba(var(--green-rgb), 0.10); border-color: rgba(var(--green-rgb), 0.22); color: #009159; }
.chip-navy  { background: rgba(var(--navy-rgb), 0.06);  border-color: rgba(var(--navy-rgb), 0.14);  color: var(--navy); }
:root[data-theme="dark"] .chip-blue  { color: #6fd0ff; }
:root[data-theme="dark"] .chip-green { color: var(--mint); }
:root[data-theme="dark"] .chip-navy  { color: #b9cdff; background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.12); }

.dot { width: 6px; height: 6px; border-radius: 50%; flex: none; background: var(--slate); }
.dot-blue  { background: var(--blue); }
.dot-green { background: var(--green); }
.dot-mint  { background: var(--mint); }
.dot-navy  { background: var(--navy); }
:root[data-theme="dark"] .dot-navy { background: #7f9dff; }
.dot-live { position: relative; }
.dot-live::after {
  content: "";
  position: absolute; inset: -3px;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  color: var(--green);
  opacity: 0;
  animation: ping 2.4s var(--ease-out) infinite;
}
@keyframes ping {
  0%   { transform: scale(0.7); opacity: 0.7; }
  70%  { transform: scale(1.7); opacity: 0; }
  100% { transform: scale(1.7); opacity: 0; }
}

/* Small tinted glyph tile used in place of large coloured headers */
.tile {
  display: grid; place-items: center;
  width: 38px; height: 38px; flex: none;
  border-radius: 11px;
  background: rgba(var(--navy-rgb), 0.05);
  color: var(--navy);
  border: 1px solid var(--line-faint);
  transition: transform var(--t-mid) var(--ease-spring), background var(--t-mid) var(--ease);
}
.tile svg { width: 18px; height: 18px; }
.tile-blue  { background: rgba(var(--blue-rgb), 0.09);  color: #0086c4; }
.tile-green { background: rgba(var(--green-rgb), 0.10); color: #00996a; }
.tile-mint  { background: rgba(var(--mint-rgb), 0.13);  color: #17a24a; }
:root[data-theme="dark"] .tile       { background: rgba(255,255,255,0.06); color: #cfe0ff; }
:root[data-theme="dark"] .tile-blue  { background: rgba(var(--blue-rgb), 0.14);  color: #6fd0ff; }
:root[data-theme="dark"] .tile-green { background: rgba(var(--green-rgb), 0.14); color: var(--mint); }
:root[data-theme="dark"] .tile-mint  { background: rgba(var(--mint-rgb), 0.14);  color: var(--mint); }
.card-hover:hover .tile, a.card:hover .tile { transform: scale(1.08) rotate(-3deg); }
.tile-lg { width: 46px; height: 46px; border-radius: 13px; }
.tile-lg svg { width: 21px; height: 21px; }

/* --------------------------------------------------------------------------
   9. Forms
   -------------------------------------------------------------------------- */
.field { display: flex; flex-direction: column; gap: 7px; }
.label { font-size: 0.82rem; font-weight: 580; letter-spacing: -0.006em; color: var(--ink-strong); }
.hint  { font-size: 0.76rem; color: var(--ink-faint); }

.input, .select, .textarea {
  width: 100%;
  height: 42px;
  padding: 0 13px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: var(--bg-elevated);
  font-size: 0.92rem;
  letter-spacing: -0.008em;
  outline: none;
  transition: border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease);
}
.textarea { height: auto; min-height: 108px; padding: 11px 13px; resize: vertical; line-height: 1.55; }
.input::placeholder, .textarea::placeholder { color: var(--ink-faint); }
.input:hover, .select:hover, .textarea:hover { border-color: rgba(var(--blue-rgb), 0.34); }
.input:focus, .select:focus, .textarea:focus {
  border-color: rgba(var(--blue-rgb), 0.7);
  box-shadow: 0 0 0 3.5px rgba(var(--blue-rgb), 0.13);
}
.select {
  appearance: none;
  padding-right: 36px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%238b93a5' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 6.5 8 10.5l4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 15px;
  cursor: pointer;
}

.search-field { position: relative; }
.search-field .input { padding-left: 38px; }
.search-field svg {
  position: absolute; left: 13px; top: 50%;
  transform: translateY(-50%);
  width: 16px; height: 16px;
  color: var(--ink-faint);
  pointer-events: none;
}

/* Switch */
.switch { display: inline-flex; align-items: center; gap: 11px; cursor: pointer; }
.switch input { position: absolute; opacity: 0; pointer-events: none; }
.switch-track {
  position: relative;
  width: 46px; height: 27px; flex: none;
  border-radius: var(--r-pill);
  background: rgba(var(--navy-rgb), 0.13);
  transition: background var(--t-mid) var(--ease);
}
.switch-track::after {
  content: "";
  position: absolute;
  top: 3px; left: 3px;
  width: 21px; height: 21px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 3px rgba(var(--navy-rgb), 0.28);
  transition: transform var(--t-mid) var(--ease-spring);
}
.switch input:checked + .switch-track { background: linear-gradient(90deg, var(--blue), var(--green)); }
.switch input:checked + .switch-track::after { transform: translateX(19px); }
.switch input:focus-visible + .switch-track { box-shadow: 0 0 0 3.5px rgba(var(--blue-rgb), 0.18); }

/* Segmented control */
.segmented {
  display: inline-flex;
  padding: 3px;
  gap: 2px;
  max-width: 100%;
  border-radius: var(--r-sm);
  background: rgba(var(--navy-rgb), 0.05);
  border: 1px solid var(--line-faint);
  /* Scrolls rather than pushing the page sideways on a narrow screen. */
  overflow-x: auto;
  scrollbar-width: none;
}
.segmented::-webkit-scrollbar { display: none; }
:root[data-theme="dark"] .segmented { background: rgba(255,255,255,0.055); }
.segmented button {
  position: relative;
  padding: 6px 15px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  font-size: 0.83rem;
  font-weight: 540;
  letter-spacing: -0.006em;
  color: var(--ink-muted);
  cursor: pointer;
  transition: color var(--t-fast) var(--ease);
  white-space: nowrap;
  flex: none;
}
.segmented button[aria-selected="true"] {
  color: var(--ink-strong);
  font-weight: 600;
  background: var(--bg-elevated);
  box-shadow: var(--shadow-xs);
}

/* Colour swatch input used on the appearance settings page */
.swatch-row { display: flex; align-items: center; gap: 12px; }
.swatch {
  width: 42px; height: 42px; flex: none;
  border-radius: var(--r-sm);
  border: 1px solid var(--line-strong);
  padding: 0;
  cursor: pointer;
  overflow: hidden;
  background: transparent;
}
.swatch::-webkit-color-swatch-wrapper { padding: 3px; }
.swatch::-webkit-color-swatch { border: 0; border-radius: 7px; }

/* --------------------------------------------------------------------------
   10. Data display
   -------------------------------------------------------------------------- */
.table-scroll { overflow-x: auto; }
.table { font-size: 0.89rem; }
.table th {
  position: sticky; top: 0;
  padding: 11px 16px;
  text-align: left;
  font-size: 0.72rem;
  font-weight: 620;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  background: var(--bg-tint);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
  z-index: 1;
}
.table td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--line-faint);
  vertical-align: middle;
}
.table tbody tr { transition: background var(--t-fast) var(--ease); }
.table tbody tr:hover { background: rgba(var(--blue-rgb), 0.035); }
.table tbody tr:last-child td { border-bottom: 0; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; }

/* Stat block */
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat-value {
  font-size: clamp(2rem, 1.5rem + 1.7vw, 2.9rem);
  line-height: 1;
  letter-spacing: -0.035em;
  font-weight: 680;
  color: var(--ink-strong);
  font-variant-numeric: tabular-nums;
}
.stat-label { font-size: 0.82rem; color: var(--ink-muted); letter-spacing: -0.005em; }
.stat-delta { display: inline-flex; align-items: center; gap: 4px; font-size: 0.76rem; font-weight: 560; }
.stat-delta.up   { color: #009159; }
.stat-delta.down { color: #b4553c; }
:root[data-theme="dark"] .stat-delta.up { color: var(--mint); }

/* Progress bar */
.bar {
  display: block;
  position: relative;
  height: 6px;
  border-radius: var(--r-pill);
  background: rgba(var(--navy-rgb), 0.075);
  overflow: hidden;
}
:root[data-theme="dark"] .bar { background: rgba(255,255,255,0.09); }
.bar > i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--blue), var(--green));
  width: 0;
  transition: width 1100ms var(--ease-out);
}
.bar.thin { height: 4px; }
.bar.navy > i { background: linear-gradient(90deg, rgba(var(--navy-rgb), 0.8), var(--blue)); }

/* Progress ring */
.ring { position: relative; display: inline-grid; place-items: center; }
.ring svg { transform: rotate(-90deg); overflow: visible; }
.ring .ring-track { stroke: rgba(var(--navy-rgb), 0.08); fill: none; }
:root[data-theme="dark"] .ring .ring-track { stroke: rgba(255,255,255,0.1); }
.ring .ring-value {
  fill: none;
  stroke: url(#ringGradient);
  stroke-linecap: round;
  transition: stroke-dashoffset 1200ms var(--ease-out);
}
.ring-label {
  position: absolute;
  font-size: 0.86rem;
  font-weight: 640;
  letter-spacing: -0.02em;
  color: var(--ink-strong);
  font-variant-numeric: tabular-nums;
}

/* Sparkline / bar chart */
.spark { display: flex; align-items: flex-end; gap: 3px; height: 46px; }
.spark i {
  flex: 1;
  min-width: 3px;
  border-radius: 2px 2px 1px 1px;
  background: linear-gradient(180deg, rgba(var(--blue-rgb), 0.38), rgba(var(--green-rgb), 0.16));
  height: 0;
  transition: height 900ms var(--ease-out), background var(--t-fast) var(--ease);
}
.spark i:hover { background: linear-gradient(180deg, var(--blue), var(--green)); }

.chart {
  display: flex; align-items: stretch; gap: clamp(3px, 0.9vw, 9px);
  height: 200px;
  padding-top: 22px;
}
.chart-col { flex: 1; display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.chart-track { flex: 1; display: flex; align-items: flex-end; justify-content: center; min-height: 0; }
.chart-bar {
  position: relative;
  width: 100%;
  max-width: 46px;
  border-radius: 6px 6px 3px 3px;
  background: linear-gradient(180deg, rgba(var(--blue-rgb), 0.34), rgba(var(--green-rgb), 0.13));
  border-top: 2px solid rgba(var(--blue-rgb), 0.55);
  height: 0;
  transition: height 950ms var(--ease-out), filter var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease);
  cursor: default;
}
.chart-bar:hover {
  background: linear-gradient(180deg, rgba(var(--blue-rgb), 0.55), rgba(var(--green-rgb), 0.24));
  border-top-color: var(--blue);
}
.chart-bar::after {
  content: attr(data-value);
  position: absolute;
  top: -22px; left: 50%;
  transform: translateX(-50%) translateY(3px);
  font-size: 0.72rem;
  font-weight: 620;
  font-variant-numeric: tabular-nums;
  color: var(--ink-strong);
  opacity: 0;
  transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease-out);
  pointer-events: none;
  white-space: nowrap;
}
.chart-bar:hover::after { opacity: 1; transform: translateX(-50%) translateY(0); }
.chart-label { font-size: 0.7rem; color: var(--ink-faint); white-space: nowrap; text-align: center; }

/* Timeline / activity feed */
.feed { display: flex; flex-direction: column; }
.feed-item {
  position: relative;
  display: flex; gap: 14px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-faint);
}
.feed-item:last-child { border-bottom: 0; }
.feed-rail { position: relative; width: 8px; flex: none; display: flex; justify-content: center; padding-top: 6px; }
.feed-rail::before {
  content: "";
  position: absolute;
  top: 16px; bottom: -14px; left: 50%;
  width: 1px;
  transform: translateX(-50%);
  background: var(--line);
}
.feed-item:last-child .feed-rail::before { display: none; }

/* Lesson list rows */
.lesson-row {
  display: flex; align-items: center; gap: 14px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--line-faint);
  transition: background var(--t-fast) var(--ease), padding-left var(--t-mid) var(--ease-out);
}
.lesson-row:last-child { border-bottom: 0; }
.lesson-row:hover { background: rgba(var(--blue-rgb), 0.04); padding-left: 26px; }
.lesson-index {
  display: grid; place-items: center;
  width: 26px; height: 26px; flex: none;
  border-radius: 8px;
  border: 1px solid var(--line);
  font-size: 0.74rem;
  font-weight: 620;
  font-variant-numeric: tabular-nums;
  color: var(--ink-faint);
  background: var(--bg-tint);
  transition: all var(--t-mid) var(--ease);
}
.lesson-row:hover .lesson-index {
  color: #0086c4;
  border-color: rgba(var(--blue-rgb), 0.3);
  background: rgba(var(--blue-rgb), 0.08);
}
.lesson-row.done .lesson-index {
  color: #009159;
  border-color: rgba(var(--green-rgb), 0.28);
  background: rgba(var(--green-rgb), 0.10);
}
:root[data-theme="dark"] .lesson-row.done .lesson-index { color: var(--mint); }
.lesson-title { font-size: 0.92rem; letter-spacing: -0.008em; flex: 1; min-width: 0; }

/* Empty state */
.empty {
  display: grid; place-items: center; gap: 12px;
  padding: 56px 24px;
  text-align: center;
}
.empty .tile { width: 52px; height: 52px; border-radius: 16px; }
.empty .tile svg { width: 24px; height: 24px; }

/* --------------------------------------------------------------------------
   11. Breadcrumbs & page header
   -------------------------------------------------------------------------- */
.crumbs { display: flex; align-items: center; gap: 7px; font-size: 0.8rem; color: var(--ink-faint); flex-wrap: wrap; }
.crumbs a { transition: color var(--t-fast) var(--ease); }
.crumbs a:hover { color: #0086c4; }
.crumbs svg { width: 13px; height: 13px; opacity: 0.5; flex: none; }
.crumbs > span[data-icon] { display: inline-flex; }
.crumbs [aria-current="page"] { color: var(--ink-muted); }

.page-head { display: flex; flex-direction: column; gap: 14px; padding-block: clamp(24px, 3vw, 38px) 6px; }
.page-head .row-between { align-items: flex-end; }

/* --------------------------------------------------------------------------
   12. Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  padding-block: clamp(48px, 7vw, 96px) clamp(36px, 5vw, 64px);
  overflow: hidden;
}
/* Very soft brand light, well under 10% — never a colour block */
.hero::before {
  content: "";
  position: absolute;
  top: -320px; left: 50%;
  width: 1100px; height: 620px;
  transform: translateX(-50%);
  background:
    radial-gradient(closest-side, rgba(var(--blue-rgb), 0.10), transparent 72%),
    radial-gradient(closest-side, rgba(var(--green-rgb), 0.075), transparent 70%);
  background-position: 30% 40%, 72% 60%;
  background-repeat: no-repeat;
  background-size: 62% 100%, 58% 96%;
  filter: blur(18px);
  pointer-events: none;
  animation: drift 22s ease-in-out infinite alternate;
}
@keyframes drift {
  from { transform: translateX(-52%) translateY(0) scale(1); }
  to   { transform: translateX(-48%) translateY(24px) scale(1.06); }
}
.hero > * { position: relative; }

/* Faint grid, effectively invisible until you look for it */
.gridlines::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, var(--line-faint) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-faint) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 20%, transparent 78%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 20%, transparent 78%);
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   13. Animated brand mark (the logo's own bar artwork, redrawn as SVG)
   -------------------------------------------------------------------------- */
/* The mark is the logo's own artwork, drawn to measured geometry in JS.
   Each shape bobs from its own baseline, so the silhouette at rest is
   exactly the logo — the outer two bars do not share a bottom edge. */
.mark { display: inline-flex; height: var(--mark-h, 22px); flex: none; }
.mark svg { display: block; height: 100%; width: auto; }
.mark g {
  transform-box: fill-box;
  transform-origin: 50% 100%;
  will-change: transform;
}
.mark .mark-b1 { animation: mark-bob 2.6s var(--ease) infinite; }
.mark .mark-b2 { animation: mark-bob 2.6s var(--ease) 0.18s infinite; }
.mark .mark-b3 { animation: mark-bob 2.6s var(--ease) 0.36s infinite; }
@keyframes mark-bob {
  0%, 100% { transform: scaleY(1); }
  50%      { transform: scaleY(0.72); }
}
.mark-static g { animation: none !important; }

/* --------------------------------------------------------------------------
   14. Motion primitives
   -------------------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
[data-reveal].in { opacity: 1; transform: none; }
[data-reveal="fade"]  { transform: none; }
[data-reveal="left"]  { transform: translateX(-22px); }
[data-reveal="right"] { transform: translateX(22px); }
[data-reveal="scale"] { transform: scale(0.965); }

/* First paint entrance for above-the-fold content */
.enter { animation: enter 780ms var(--ease-out) both; animation-delay: var(--enter-delay, 0ms); }
@keyframes enter {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

/* Page transition (progressive enhancement over the View Transitions API) */
@view-transition { navigation: auto; }
::view-transition-old(root) { animation: vt-out 180ms var(--ease) both; }
::view-transition-new(root) { animation: vt-in  320ms var(--ease-out) both; }
@keyframes vt-out { to { opacity: 0; transform: translateY(-6px); } }
@keyframes vt-in  { from { opacity: 0; transform: translateY(8px); } }

/* Shimmer used for skeletons */
.skeleton {
  border-radius: var(--r-sm);
  background: linear-gradient(90deg, var(--bg-sunken) 25%, rgba(var(--blue-rgb), 0.06) 37%, var(--bg-sunken) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
}
@keyframes shimmer { from { background-position: 100% 0; } to { background-position: -100% 0; } }

/* Toast */
.toast-wrap {
  position: fixed;
  bottom: 22px; left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  display: flex; flex-direction: column; gap: 10px;
  align-items: center;
  pointer-events: none;
}
.toast {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-lg);
  font-size: 0.88rem;
  color: var(--ink-strong);
  animation: toast-in 420ms var(--ease-spring) both;
}
.toast.out { animation: toast-out 260ms var(--ease) both; }
@keyframes toast-in  { from { opacity: 0; transform: translateY(16px) scale(0.94); } }
@keyframes toast-out { to   { opacity: 0; transform: translateY(10px) scale(0.96); } }

/* Scroll progress line, sits just under the brand hairline */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  width: 0;
  z-index: 201;
  background: linear-gradient(90deg, var(--navy), var(--blue), var(--green));
  transition: width 90ms linear;
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   15. Utilities
   -------------------------------------------------------------------------- */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; top: 8px; left: 8px;
  z-index: 400;
  padding: 10px 16px;
  border-radius: var(--r-sm);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-lg);
  font-size: 0.88rem; font-weight: 600;
  transform: translateY(-160%);
  transition: transform var(--t-mid) var(--ease-out);
}
.skip-link:focus { transform: translateY(0); }

.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.clamp-2 {
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden; overflow-wrap: anywhere;
}
.clamp-3 {
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical;
  overflow: hidden; overflow-wrap: anywhere;
}
.hide { display: none !important; }
.mt-0 { margin-top: 0; }  .mt-1 { margin-top: 8px; }  .mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; } .mt-4 { margin-top: 32px; } .mt-5 { margin-top: 48px; }
.gap-sm { gap: 8px; } .gap-lg { gap: 24px; }
.w-full { width: 100%; }
.text-right { text-align: right; }
.wrap-anywhere { overflow-wrap: anywhere; }

/* --------------------------------------------------------------------------
   16. Footer
   -------------------------------------------------------------------------- */
.footer {
  margin-top: clamp(56px, 7vw, 96px);
  border-top: 1px solid var(--line);
  background: var(--bg-tint);
}
.footer-inner {
  display: grid;
  gap: 32px;
  grid-template-columns: minmax(220px, 1.4fr) repeat(auto-fit, minmax(140px, 1fr));
  padding-block: clamp(36px, 4.4vw, 56px);
}
.footer-col-title {
  font-size: 0.74rem; font-weight: 620; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--ink-faint);
  margin-bottom: 12px;
}
.footer a { display: block; font-size: 0.88rem; color: var(--ink-muted); padding-block: 5px; transition: color var(--t-fast) var(--ease); }
.footer a:hover { color: #0086c4; }
.footer-bottom {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  flex-wrap: wrap;
  padding-block: 18px;
  border-top: 1px solid var(--line-faint);
  font-size: 0.79rem;
  color: var(--ink-faint);
}


/* --------------------------------------------------------------------------
   17. Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .search-trigger { min-width: 0; }
  .search-trigger span, .search-trigger kbd { display: none; }
  .search-trigger { width: 34px; padding: 0; justify-content: center; }
}

@media (max-width: 820px) {
  :root { --gutter: 18px; --nav-h: 56px; }
  .nav-links { display: none; }
  .nav-toggle { display: inline-grid; }
  .brand-divider, .brand-sub { display: none; }
  .usermenu { display: none; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .chart { height: 150px; }
}

@media (max-width: 620px) {
  .toolbar-row { flex-wrap: wrap; }
  .toolbar-row > * { flex: 1 1 100%; }
  .toolbar-row .btn { flex: 0 0 auto; }
}

@media (max-width: 520px) {
  .footer-inner { grid-template-columns: 1fr; }
  .card { padding: 18px; }
  .lesson-row { padding-inline: 16px; }
  .lesson-row:hover { padding-left: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
}

@media print {
  .nav, .drawer, .palette, .footer, .scroll-progress, .toast-wrap { display: none !important; }
  main { padding-top: 0; }
  body::before { display: none; }
  .card, .panel { box-shadow: none; border-color: #ddd; }
}

/* --------------------------------------------------------------------------
   18. Lesson stage
   -------------------------------------------------------------------------- */
.stage {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  isolation: isolate;
}
.stage::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, var(--line-faint) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-faint) 1px, transparent 1px);
  background-size: 40px 40px;
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, #000, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 70% at 50% 50%, #000, transparent 75%);
  pointer-events: none;
}
.stage-glow {
  position: absolute;
  top: 50%; left: 50%;
  width: 620px; height: 420px;
  transform: translate(-50%, -50%);
  background:
    radial-gradient(closest-side, rgba(var(--blue-rgb), 0.13), transparent 70%),
    radial-gradient(closest-side, rgba(var(--green-rgb), 0.10), transparent 70%);
  background-position: 24% 40%, 74% 62%;
  background-repeat: no-repeat;
  background-size: 60% 92%, 58% 88%;
  filter: blur(12px);
  animation: drift 18s ease-in-out infinite alternate;
  pointer-events: none;
}
.stage-inner {
  position: relative;
  z-index: 1;
  display: flex; flex-direction: column; align-items: center;
  text-align: center;
  padding: clamp(44px, 6vw, 76px) 24px;
  aspect-ratio: 16 / 8.4;
  justify-content: center;
}
/* Real media fills the stage; the decorative treatment is kept only for the
   unmapped state, which still needs to look deliberate. */
.stage-video, .stage-embed { background: #05070f; }
.stage-video video,
.stage-embed iframe {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 0;
  background: #05070f;
}
.stage-video { position: relative; }
.stage-video::after, .stage-embed::after { display: none; }

.stage-controls {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 14px;
  border-top: 1px solid var(--line-faint);
  background: var(--bg-elevated);
}
.stage-controls [data-speed] {
  font-variant-numeric: tabular-nums;
  min-width: 52px;
  border: 1px solid var(--line);
}
.stage-note { padding: 10px 14px; background: var(--bg-elevated); margin: 0; }

.stage-empty .stage-inner { aspect-ratio: 16 / 8.4; }
.stage-empty code.key { font-size: 0.74rem; }

@media (max-width: 620px) {
  .stage-controls { flex-wrap: wrap; gap: 8px; }
  .stage-controls .tiny { flex: 1 1 100%; }
}

.play-btn {
  display: grid; place-items: center;
  width: 66px; height: 66px;
  margin-top: 26px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--bg-elevated);
  color: var(--ink-strong);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: transform var(--t-mid) var(--ease-spring), box-shadow var(--t-mid) var(--ease);
}
.play-btn svg { width: 24px; height: 24px; fill: currentColor; stroke: none; margin-left: 3px; }
.play-btn::before {
  content: "";
  position: absolute;
  width: 66px; height: 66px;
  border-radius: 50%;
  border: 1.5px solid rgba(var(--blue-rgb), 0.5);
  animation: ping 3s var(--ease-out) infinite;
  pointer-events: none;
}
.play-btn:hover { transform: scale(1.08); box-shadow: var(--shadow-lg); }
.play-btn:active { transform: scale(0.96); }

@media (max-width: 900px) {
  .grid[style*="2.1fr"], .grid[style*="2.2fr"], .grid[style*="1.65fr"] {
    grid-template-columns: minmax(0, 1fr) !important;
  }
  .panel[style*="sticky"] { position: static !important; max-height: none !important; }
}

/* --------------------------------------------------------------------------
   19. Settings
   -------------------------------------------------------------------------- */
.settings-rail {
  position: sticky;
  top: calc(var(--nav-h) + 20px);
  display: flex; flex-direction: column; gap: 2px;
}
.rail-link {
  position: relative;
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px;
  border-radius: var(--r-sm);
  font-size: 0.87rem;
  font-weight: 520;
  letter-spacing: -0.008em;
  color: var(--ink-muted);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.rail-link svg { width: 16px; height: 16px; opacity: 0.6; flex: none; }
.rail-link:hover { background: rgba(var(--navy-rgb), 0.045); color: var(--ink-strong); }
:root[data-theme="dark"] .rail-link:hover { background: rgba(255, 255, 255, 0.06); }
.rail-link.is-active { color: var(--ink-strong); font-weight: 600; background: rgba(var(--blue-rgb), 0.07); }
.rail-link.is-active svg { opacity: 1; color: #0086c4; }
.rail-link.is-active::before {
  content: "";
  position: absolute;
  left: 0; top: 8px; bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--blue), var(--green));
}

.logo-drop {
  display: flex; flex-direction: column; align-items: center;
  padding: 26px 20px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-md);
  background: var(--bg-tint);
  text-align: center;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.logo-drop:hover { border-color: rgba(var(--blue-rgb), 0.42); background: rgba(var(--blue-rgb), 0.035); }
.logo-drop .logo-lockup { --logo-h: 44px; }

code.key {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 3px 8px;
  border-radius: var(--r-xs);
  background: rgba(var(--navy-rgb), 0.05);
  border: 1px solid var(--line-faint);
  color: var(--ink-muted);
}
:root[data-theme="dark"] code.key { background: rgba(255, 255, 255, 0.06); }

@media (max-width: 900px) {
  .grid[style*="200px"] { grid-template-columns: minmax(0, 1fr) !important; }
  .settings-rail {
    position: static;
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--line-faint);
  }
  .rail-link { white-space: nowrap; }
  .rail-link.is-active::before { left: 8px; right: 8px; top: auto; bottom: 0; width: auto; height: 2px; }
}

/* --------------------------------------------------------------------------
   20. Offline
   -------------------------------------------------------------------------- */
/* display:flex outranks the browser's [hidden] rule, so the banner would
   still paint its background while empty. Restate it explicitly. */
.net-status[hidden] { display: none; }

.net-status {
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  z-index: 119;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 7px 16px;
  font-size: 0.8rem;
  font-weight: 540;
  letter-spacing: -0.005em;
  color: #7a4a1a;
  background: #fff4e5;
  border-bottom: 1px solid rgba(122, 74, 26, 0.14);
  animation: enter 320ms var(--ease-out) both;
}
:root[data-theme="dark"] .net-status { color: #ffd9a8; background: #2a1c08; border-bottom-color: rgba(255, 217, 168, 0.16); }
.net-status svg { width: 14px; height: 14px; flex: none; }

/* The downloaded-state tile leans on the same tinted glyph as everywhere else. */
#offlineCard .bar { height: 6px; }
#offlineCard .bar > i { transition: width 240ms var(--ease-out); }

/* --------------------------------------------------------------------------
   21. Admin hub
   -------------------------------------------------------------------------- */
.admin-link {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 8px;
  margin-inline: -8px;
  border-radius: var(--r-sm);
  font-size: 0.89rem;
  color: var(--ink-muted);
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease),
              padding-left var(--t-mid) var(--ease-out);
}
.admin-link svg { width: 13px; height: 13px; opacity: 0.4; flex: none; }
.admin-link:hover {
  background: rgba(var(--blue-rgb), 0.07);
  color: var(--ink-strong);
  padding-left: 14px;
}
.admin-link:hover svg { opacity: 1; color: #0086c4; }

/* --------------------------------------------------------------------------
   22. Proposal generator
   -------------------------------------------------------------------------- */
.model-option {
  display: flex; align-items: flex-start; gap: 11px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.model-option:hover { border-color: rgba(var(--blue-rgb), 0.34); }
.model-option.is-on {
  border-color: rgba(var(--blue-rgb), 0.55);
  background: rgba(var(--blue-rgb), 0.045);
}
.model-option input { margin-top: 3px; accent-color: #00a3e6; flex: none; }

.proposal-sheet { position: relative; overflow: hidden; }
.proposal-head {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line-faint);
  background: var(--bg-tint);
}

/* Aligned at the top, not centred: dual pricing carries no effective rate, so
   its column is a line shorter and centring drops the headline figure below the
   one it is being compared with. The arrow centres itself against the taller
   column. */
.compare { display: grid; grid-template-columns: 1fr auto 1fr; align-items: start; gap: 16px; }
.compare-col { text-align: center; }
.compare-arrow { display: grid; place-items: center; align-self: center; color: var(--ink-faint); }
.compare-arrow svg { width: 22px; height: 22px; }

/* Three periods across one band: the month, the year, the term. Equal columns
   so the eye compares them, divided by a hairline that takes its colour from
   whichever way the comparison went. */
.saving-band {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 22px;
  padding: 18px 4px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--bg-tint);
}
.saving-cell { padding: 0 16px; min-width: 0; }
.saving-cell + .saving-cell { border-left: 1px solid var(--line); }
.saving-figure {
  font-size: clamp(1.35rem, 2.4vw + 0.5rem, 1.95rem);
  line-height: 1.12;
  margin-top: 3px;
  letter-spacing: -0.022em;
}
.saving-band.is-good {
  border-color: rgba(var(--green-rgb), 0.35);
  background: rgba(var(--green-rgb), 0.06);
}
.saving-band.is-good .saving-cell + .saving-cell { border-left-color: rgba(var(--green-rgb), 0.3); }
.saving-band.is-good .display { color: #009159; }
:root[data-theme="dark"] .saving-band.is-good .display { color: var(--mint); }
.saving-band.is-bad {
  border-color: rgba(180, 85, 60, 0.4);
  background: rgba(180, 85, 60, 0.05);
}
.saving-band.is-bad .saving-cell + .saving-cell { border-left-color: rgba(180, 85, 60, 0.3); }
.saving-band.is-bad .display { color: #b4553c; }
:root[data-theme="dark"] .saving-band.is-bad .display { color: #ff9d80; }

/* On a narrow screen three columns squeeze the figures past legibility, so the
   band stacks and the dividers turn horizontal. Print keeps all three across:
   a sheet is always full width. */
@media (max-width: 560px) {
  .saving-band { grid-template-columns: minmax(0, 1fr); padding: 6px 20px 14px; }
  .saving-cell { padding: 12px 0; }
  .saving-cell + .saving-cell { border-left: 0; border-top: 1px solid var(--line); }
  .saving-band.is-good .saving-cell + .saving-cell { border-top-color: rgba(var(--green-rgb), 0.3); }
  .saving-band.is-bad .saving-cell + .saving-cell { border-top-color: rgba(180, 85, 60, 0.3); }
  .saving-figure { font-size: 1.7rem; }
}

@media (max-width: 1080px) {
  .grid[style*="1.05fr"] { grid-template-columns: minmax(0, 1fr) !important; }
}
@media (max-width: 520px) {
  .compare { grid-template-columns: 1fr; }
  .compare-arrow { transform: rotate(90deg); }
}

/* Printing a proposal should yield the sheet and nothing else. */
@media print {
  .no-print, .page-head, #proposalForm { display: none !important; }
  .proposal-sheet { border: 0; box-shadow: none; }
  .proposal-head { background: none; }
  .grid[style*="1.05fr"] { display: block !important; }
  .saving-band { border: 1px solid #ccc; background: none; }
}

/* The roster file is gitignored and generated, so it goes missing on a fresh
   clone. This says so across the top of any page that needed it, in a tone
   that cannot be mistaken for a normal empty state. */
.roster-missing {
  background: rgba(180, 85, 60, 0.1);
  border-bottom: 1px solid rgba(180, 85, 60, 0.35);
  color: #8f3f2b;
  padding: 11px 0;
  font-size: 0.84rem;
  line-height: 1.5;
}
.roster-missing strong { font-weight: 640; }
.roster-missing code.key { background: rgba(180, 85, 60, 0.12); color: inherit; }
:root[data-theme="dark"] .roster-missing {
  background: rgba(255, 157, 128, 0.12);
  border-bottom-color: rgba(255, 157, 128, 0.3);
  color: #ffb59d;
}
:root[data-theme="dark"] .roster-missing code.key { background: rgba(255, 157, 128, 0.15); }

/* --------------------------------------------------------------------------
   Interchange schedule and card mixes
   -------------------------------------------------------------------------- */
/* The schedule runs to twelve hundred rows and a card mix to nine, so both
   tables trade the roomy default padding for density. */
.table-tight th, .table-tight td { padding-top: 8px; padding-bottom: 8px; }
.table-tight { font-size: 0.84rem; }
.mono { font-family: var(--font-mono); letter-spacing: -0.02em; }

.mix-head td { cursor: default; }
.mix-body > td { padding: 0 !important; background: var(--bg-tint); }
.mix-detail { padding: 4px 20px 16px; }
.mix-detail .table { background: none; }
.mix-detail thead th { border-top: 0; }
.mix-warn { color: #b4553c; }
:root[data-theme="dark"] .mix-warn { color: #ff9d80; }

.course-pick {
  display: flex; align-items: flex-start; gap: 9px;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.course-pick:hover { border-color: rgba(var(--blue-rgb), 0.34); background: rgba(var(--blue-rgb), 0.035); }
.course-pick input { margin-top: 2px; accent-color: #00a3e6; flex: none; }

.asset-tile {
  display: flex; flex-direction: column; align-items: center;
  padding: 16px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--bg-tint);
  text-align: center;
  transition: border-color var(--t-fast) var(--ease), transform var(--t-mid) var(--ease-out);
}
.asset-tile:hover { border-color: rgba(var(--blue-rgb), 0.34); transform: translateY(-2px); }