/* ============================================================
   MERRY — Editorial Code Journal design system
   Cream paper · deep ink · hot vermillion · electric lime ·
   Fraunces (display, italic) · Bricolage Grotesque (UI) ·
   JetBrains Mono (chrome)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,300..900&family=Instrument+Serif:ital@0;1&family=Bricolage+Grotesque:opsz,wght@12..96,200..800&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  /* Color palette */
  --paper: #FAF3E0;
  --paper-2: #F2E9D0;
  --paper-3: #E8DEB9;
  --ink: #0E1A3D;
  --ink-2: #2A335C;
  --ink-soft: #6A719A;
  --hairline: rgba(14, 26, 61, 0.16);

  --hot: #FF5240;        /* vermillion — alerts, grades, accents */
  --cool: #2B6BFF;       /* electric blue — links, secondary CTAs */
  --go: #C7FF3D;         /* electric lime — JOIN MEET, success */
  --sun: #FFD23F;        /* sunshine — stars, highlights */
  --rose: #FFB5A7;
  --plum: #5B2A86;

  /* Typography */
  --font-display: 'Fraunces', 'Iowan Old Style', Georgia, serif;
  --font-display-italic: 'Instrument Serif', 'Iowan Old Style', Georgia, serif;
  --font-ui: 'Bricolage Grotesque', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  /* Spacing scale */
  --s-1: 0.25rem;  --s-2: 0.5rem;  --s-3: 0.75rem;  --s-4: 1rem;
  --s-5: 1.5rem;   --s-6: 2rem;    --s-7: 2.5rem;   --s-8: 3rem;
  --s-10: 4rem;    --s-12: 6rem;

  /* Shadows (hard-offset, no blur) */
  --shadow: 4px 4px 0 var(--ink);
  --shadow-lg: 8px 8px 0 var(--ink);
  --shadow-hot: 6px 6px 0 var(--hot);
  --shadow-cool: 6px 6px 0 var(--cool);
  --shadow-go: 6px 6px 0 var(--ink);

  /* Borders */
  --bd: 2px solid var(--ink);
  --bd-thick: 3px solid var(--ink);
  --bd-hair: 1px solid var(--hairline);
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html, body { height: 100%; }

body {
  font-family: var(--font-ui);
  font-optical-sizing: auto;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
  background-image: radial-gradient(circle at 1px 1px, rgba(14, 26, 61, 0.07) 1px, transparent 0);
  background-size: 26px 26px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Paper grain overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.55;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,%3Csvg viewBox='0 0 240 240' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.06 0 0 0 0 0.1 0 0 0 0 0.24 0 0 0 0.18 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* === Typography === */
h1, h2, h3, h4, h5 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.05;
  font-optical-sizing: auto;
}
h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.35rem; }

.it {
  font-family: var(--font-display-italic);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.005em;
}
/* Body <em> stays in body font for readability — only use display italic via .it class */
em {
  font-style: italic;
  font-weight: inherit;
}
.prose em {
  font-style: italic;
  color: var(--ink-2);
}
.serif { font-family: var(--font-display); }
.serif-it {
  font-family: var(--font-display-italic);
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.005em;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--ink-soft);
  font-weight: 500;
}
.eyebrow-bar::before {
  content: '';
  display: inline-block;
  width: 28px; height: 2px;
  background: var(--hot);
  margin-right: var(--s-3);
  vertical-align: middle;
  margin-bottom: 3px;
}

a { color: var(--ink); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; transition: color 0.15s, text-decoration-thickness 0.15s; }
a:hover { color: var(--cool); text-decoration-thickness: 2px; }
a.plain { text-decoration: none; }
a.plain:hover { color: var(--cool); text-decoration: none; }

hr { border: none; border-top: var(--bd-hair); margin: var(--s-5) 0; }

/* === Layout shell === */
.shell { position: relative; z-index: 2; min-height: 100vh; display: flex; flex-direction: column; }
main { flex: 1; padding-bottom: var(--s-12); }

.container { width: 100%; max-width: 1240px; margin-inline: auto; padding-inline: var(--s-5); }
.container-narrow { max-width: 760px; margin-inline: auto; padding-inline: var(--s-5); }

.stack > * + * { margin-top: var(--s-5); }
.stack-sm > * + * { margin-top: var(--s-2); }
.stack-lg > * + * { margin-top: var(--s-8); }

/* === Masthead navigation === */
.masthead {
  border-bottom: var(--bd);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 50;
}
.masthead-inner {
  display: flex;
  align-items: center;
  gap: var(--s-6);
  padding: var(--s-4) var(--s-5);
  max-width: 1240px;
  margin-inline: auto;
}
.brand {
  font-family: var(--font-display-italic);
  font-style: italic;
  font-size: clamp(1.3rem, 2.4vw, 1.8rem);
  font-weight: 400;
  text-decoration: none !important;
  letter-spacing: -0.01em;
  color: var(--ink);
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
}
.brand:hover { color: var(--ink); }
.brand-dot {
  display: inline-block;
  width: 12px; height: 12px;
  background: var(--hot);
  border-radius: 50%;
  align-self: center;
  margin-bottom: 2px;
  box-shadow: 2px 2px 0 var(--ink);
}
.brand-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--ink-soft);
  font-style: normal;
}

.nav-links { display: flex; gap: var(--s-5); margin-left: var(--s-5); }
.nav-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  text-decoration: none;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  color: var(--ink);
  transition: border-color 0.15s, color 0.15s;
}
.nav-link:hover { border-bottom-color: var(--ink); color: var(--ink); text-decoration: none; }
.nav-link.active { border-bottom-color: var(--hot); }
.nav-spacer { flex: 1; }
.nav-user {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
  display: flex; align-items: center; gap: var(--s-3);
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  font-weight: 500;
  padding: 0.65rem 1rem;
  border: var(--bd);
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  text-decoration: none !important;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.15s;
  position: relative;
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: var(--shadow); color: var(--ink); }
.btn:active { transform: translate(0, 0); box-shadow: 2px 2px 0 var(--ink); }

.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { color: var(--paper); box-shadow: 4px 4px 0 var(--hot); }

.btn-hot { background: var(--hot); color: var(--paper); border-color: var(--ink); }
.btn-hot:hover { color: var(--paper); }

.btn-ghost { background: transparent; }

.btn-lg { font-size: 0.95rem; padding: 1rem 1.5rem; letter-spacing: 0.15em; }
.btn-sm { font-size: 0.62rem; padding: 0.4rem 0.7rem; }

.btn-go {
  background: var(--go);
  color: var(--ink);
  border: var(--bd);
  font-size: 0.95rem;
  padding: 1rem 1.6rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  position: relative;
}
.btn-go:hover { color: var(--ink); box-shadow: 6px 6px 0 var(--ink); }
.btn-go.live { animation: pulse-go 1.8s ease-in-out infinite; }

.btn-disabled, .btn[aria-disabled="true"] {
  background: var(--paper-2);
  color: var(--ink-soft);
  cursor: not-allowed;
  border-color: var(--ink-soft);
}
.btn-disabled:hover { transform: none; box-shadow: none; color: var(--ink-soft); }

.btn-link {
  background: transparent; border: none; padding: 0;
  text-decoration: underline; text-transform: none;
  font-family: var(--font-ui); letter-spacing: 0;
  font-size: 0.9rem; color: var(--cool);
}
.btn-link:hover { transform: none; box-shadow: none; color: var(--cool); }

.btn-danger { background: var(--paper); color: var(--hot); border-color: var(--hot); }
.btn-danger:hover { box-shadow: 4px 4px 0 var(--hot); color: var(--hot); }

/* === Cards === */
.card {
  background: var(--paper);
  border: var(--bd);
  padding: var(--s-5);
  position: relative;
}
.card-shadow { box-shadow: var(--shadow); }
.card-shadow-hot { box-shadow: var(--shadow-hot); }
.card-shadow-cool { box-shadow: var(--shadow-cool); }
.card-shadow-lg { box-shadow: var(--shadow-lg); }

.card-hoverable { transition: transform 0.18s, box-shadow 0.18s; }
.card-hoverable:hover { transform: translate(-3px, -3px); box-shadow: var(--shadow); }

.card-head {
  margin: calc(-1 * var(--s-5)) calc(-1 * var(--s-5)) var(--s-4);
  padding: var(--s-3) var(--s-5);
  border-bottom: var(--bd-hair);
  display: flex; justify-content: space-between; align-items: center;
}
.card-head .eyebrow { margin: 0; }

/* === Pills & badges === */
.pill {
  display: inline-flex; align-items: center; gap: 4px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding: 4px 10px;
  border: 1.5px solid var(--ink);
  background: var(--paper);
  border-radius: 999px;
  font-weight: 500;
  white-space: nowrap;
}
.pill-hot { background: var(--hot); color: var(--paper); border-color: var(--hot); }
.pill-cool { background: var(--cool); color: var(--paper); border-color: var(--cool); }
.pill-go { background: var(--go); color: var(--ink); border-color: var(--ink); }
.pill-sun { background: var(--sun); color: var(--ink); border-color: var(--ink); }
.pill-ghost { background: transparent; }
.pill-mute { background: var(--paper-2); color: var(--ink-soft); border-color: var(--ink-soft); }

/* === Forms === */
.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  margin-bottom: var(--s-2);
  color: var(--ink-soft);
  font-weight: 500;
}
.form-control, .form-select,
input[type="text"], input[type="email"], input[type="password"],
input[type="datetime-local"], input[type="number"], textarea, select {
  width: 100%;
  font-family: var(--font-ui);
  font-size: 1rem;
  padding: 0.65rem 0.85rem;
  background: var(--paper);
  border: var(--bd);
  color: var(--ink);
  outline: none;
  transition: box-shadow 0.12s, transform 0.12s;
}
.form-control:focus, textarea:focus, select:focus, input:focus,
.form-select:focus { box-shadow: 4px 4px 0 var(--cool); }
textarea { resize: vertical; min-height: 100px; line-height: 1.6; }
.font-monospace, textarea.font-monospace { font-family: var(--font-mono) !important; font-size: 0.92rem; }
.form-text { font-size: 0.8rem; color: var(--ink-soft); margin-top: var(--s-2); font-style: italic; }
.form-error { font-size: 0.8rem; color: var(--hot); margin-top: var(--s-1); font-family: var(--font-mono); }

.form-row { display: grid; gap: var(--s-4); }
.form-row.cols-2 { grid-template-columns: 1fr 1fr; }
.form-row.cols-3 { grid-template-columns: 2fr 1fr 1fr; }
@media (max-width: 640px) {
  .form-row.cols-2, .form-row.cols-3 { grid-template-columns: 1fr; }
}

/* === Alerts === */
.alert {
  border: var(--bd);
  padding: var(--s-3) var(--s-4);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  margin-top: var(--s-5);
  margin-bottom: var(--s-4);
  background: var(--paper);
  position: relative;
  display: flex; justify-content: space-between; align-items: center; gap: var(--s-4);
  box-shadow: var(--shadow);
}
.alert-success { background: var(--go); }
.alert-info { background: var(--paper-2); }
.alert-danger { background: var(--hot); color: var(--paper); border-color: var(--hot); }
.alert-warning { background: var(--sun); }
.btn-close {
  background: transparent; border: none; cursor: pointer; font-size: 1.1rem;
  color: inherit; padding: 0; line-height: 1;
}

/* === Tables === */
.table-wrap { background: var(--paper); border: var(--bd); overflow-x: auto; }
table { width: 100%; border-collapse: separate; border-spacing: 0; }
table th, table td { padding: 0.85rem 1rem; text-align: left; border-bottom: var(--bd-hair); vertical-align: middle; }
table th {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  background: var(--paper-2);
  color: var(--ink);
  border-bottom: var(--bd);
  font-weight: 500;
}
table tbody tr:last-child td { border-bottom: none; }
table tbody tr:hover { background: var(--paper-2); }

/* === Lists === */
.list { background: var(--paper); border: var(--bd); }
.list-item {
  padding: var(--s-4);
  border-bottom: var(--bd-hair);
  display: flex; justify-content: space-between; align-items: center; gap: var(--s-4);
  transition: background 0.12s;
}
.list-item:last-child { border-bottom: none; }
.list-item:hover { background: var(--paper-2); }
.list-item-stack { display: flex; flex-direction: column; gap: 2px; }

.empty {
  padding: var(--s-10) var(--s-5);
  text-align: center;
  color: var(--ink-soft);
}
.empty .it {
  display: block;
  font-family: var(--font-display-italic);
  font-style: italic;
  font-weight: 400;
  font-size: 1.6rem;
  margin-bottom: var(--s-2);
  color: var(--ink-2);
}
.empty .mono {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

/* === Tabs === */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: var(--bd);
  margin-bottom: var(--s-6);
  overflow-x: auto;
}
.tab {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding: var(--s-3) var(--s-5);
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  color: var(--ink-soft);
  transition: color 0.15s, border-color 0.15s;
  margin-bottom: -2px;
  white-space: nowrap;
}
.tab:hover { color: var(--ink); }
.tab.active { color: var(--ink); border-bottom-color: var(--hot); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* === Page header === */
.page-head {
  padding: var(--s-8) 0 var(--s-5);
  display: flex; justify-content: space-between; align-items: flex-end; gap: var(--s-5);
  border-bottom: var(--bd);
  margin-bottom: var(--s-7);
  flex-wrap: wrap;
}
.page-head .title-block { flex: 1; min-width: 280px; }
.page-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 0.95;
  font-weight: 500;
  letter-spacing: -0.03em;
  margin-top: var(--s-2);
}
.page-title .accent { font-family: var(--font-display-italic); font-style: italic; color: var(--cool); font-weight: 400; }
.page-actions { display: flex; gap: var(--s-3); flex-wrap: wrap; }

/* === Hero: Next session card (student) === */
.next-session {
  background: var(--ink);
  color: var(--paper);
  padding: var(--s-7) var(--s-7) var(--s-6);
  border: var(--bd);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.next-session-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--go);
  margin-bottom: var(--s-3);
  display: flex; align-items: center; gap: var(--s-2);
}
.next-session-eyebrow .live-dot {
  display: inline-block;
  width: 8px; height: 8px;
  background: var(--go);
  border-radius: 50%;
  animation: pulse-dot 1.4s infinite;
}
.next-session-topic {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: -0.035em;
  margin-bottom: var(--s-2);
  font-variation-settings: "opsz" 144;
  color: var(--paper);
}
.next-session-topic .it { color: var(--go); }
.next-session-batch {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  color: var(--rose);
  margin-bottom: var(--s-2);
}
.next-session-when {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: rgba(250, 243, 224, 0.65);
  margin-bottom: var(--s-6);
}
.next-session-actions { display: flex; gap: var(--s-4); align-items: center; flex-wrap: wrap; }
.next-session::after {
  content: '';
  position: absolute;
  width: 320px; height: 320px;
  background: radial-gradient(circle, var(--hot) 1.5px, transparent 1.5px);
  background-size: 14px 14px;
  bottom: -120px; right: -120px;
  opacity: 0.25;
  pointer-events: none;
}
.next-session::before {
  content: 'NEXT';
  position: absolute;
  top: 50%;
  right: -22px;
  transform: rotate(90deg) translateX(-50%);
  transform-origin: top right;
  font-family: var(--font-display-italic);
  font-style: italic;
  font-weight: 400;
  font-size: 6rem;
  color: rgba(199, 255, 61, 0.06);
  pointer-events: none;
  letter-spacing: -0.04em;
}

.no-session {
  background: var(--paper);
  border: var(--bd);
  padding: var(--s-8) var(--s-7);
  text-align: center;
  position: relative;
}
.no-session-title {
  font-family: var(--font-display-italic);
  font-style: italic;
  font-weight: 400;
  font-size: 2rem;
  margin-bottom: var(--s-2);
}

/* === Stars === */
.stars { font-family: var(--font-mono); letter-spacing: 0.15em; color: var(--sun); font-size: 1rem; }
.stars-lg { font-size: 1.5rem; }

/* === Markdown prose === */
.prose {
  font-family: var(--font-ui);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 70ch;
  color: var(--ink);
}
.prose h1 { font-size: 2.5rem; margin-top: 2.2rem; margin-bottom: 1rem; }
.prose h2 { font-size: 1.85rem; margin-top: 2rem; margin-bottom: 0.85rem; }
.prose h3 { font-size: 1.3rem; margin-top: 1.5rem; margin-bottom: 0.75rem; }
.prose p { margin-bottom: 1rem; }
.prose ul, .prose ol { padding-left: 1.5em; margin-bottom: 1rem; }
.prose li { margin-bottom: 0.4em; }
.prose code {
  font-family: var(--font-mono);
  background: var(--paper-2);
  padding: 0.1em 0.4em;
  font-size: 0.9em;
  border: 1px solid var(--ink-soft);
  border-radius: 2px;
}
.prose pre {
  font-family: var(--font-mono);
  background: var(--ink);
  color: var(--paper);
  padding: 1.25rem;
  overflow-x: auto;
  border: var(--bd);
  margin-bottom: 1rem;
  font-size: 0.9rem;
  line-height: 1.6;
}
.prose pre code { background: transparent; border: none; padding: 0; color: inherit; }
.prose blockquote {
  border-left: 4px solid var(--hot);
  padding-left: 1rem;
  font-style: italic;
  color: var(--ink-2);
  margin: 1rem 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
}
.prose a { color: var(--cool); }
.prose img { max-width: 100%; border: var(--bd); }

/* === Sticky note === */
.sticky {
  background: var(--sun);
  border: var(--bd);
  padding: var(--s-3) var(--s-4);
  transform: rotate(-1.2deg);
  font-family: var(--font-display-italic);
  font-style: italic;
  font-weight: 400;
  display: inline-block;
  box-shadow: var(--shadow);
}

/* === Animations === */
@keyframes pulse-go {
  0%, 100% { box-shadow: 4px 4px 0 var(--ink); }
  50% { box-shadow: 7px 7px 0 var(--ink); transform: translate(-1.5px, -1.5px); }
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.4); }
}
@keyframes fade-up {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}
.reveal { animation: fade-up 0.5s ease-out backwards; }
.reveal-1 { animation-delay: 0.05s; }
.reveal-2 { animation-delay: 0.15s; }
.reveal-3 { animation-delay: 0.25s; }
.reveal-4 { animation-delay: 0.35s; }
.reveal-5 { animation-delay: 0.45s; }

/* === Utilities === */
.row { display: grid; gap: var(--s-5); }
.row-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.row-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.row-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.row-7-5 { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.row-8-4 { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
@media (max-width: 880px) {
  .row-2, .row-3, .row-4, .row-7-5, .row-8-4 { grid-template-columns: 1fr; }
}

.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; gap: var(--s-3); }
.flex-end { display: flex; justify-content: flex-end; gap: var(--s-3); }
.flex-col { display: flex; flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: var(--s-1); } .gap-2 { gap: var(--s-2); } .gap-3 { gap: var(--s-3); }
.gap-4 { gap: var(--s-4); } .gap-5 { gap: var(--s-5); } .gap-6 { gap: var(--s-6); }

.muted { color: var(--ink-soft); }
.text-mono { font-family: var(--font-mono); }
.text-italic { font-style: italic; }
.text-sm { font-size: 0.85rem; }
.text-xs { font-size: 0.72rem; }
.text-lg { font-size: 1.15rem; }
.text-xl { font-size: 1.35rem; }
.text-uppercase { text-transform: uppercase; letter-spacing: 0.15em; }
.text-center { text-align: center; }
.text-end { text-align: right; }
.fw-500 { font-weight: 500; }
.fw-700 { font-weight: 700; }

.mt-0 { margin-top: 0; } .mt-2 { margin-top: var(--s-2); } .mt-3 { margin-top: var(--s-3); }
.mt-4 { margin-top: var(--s-4); } .mt-5 { margin-top: var(--s-5); }
.mt-6 { margin-top: var(--s-6); } .mt-8 { margin-top: var(--s-8); } .mt-10 { margin-top: var(--s-10); }
.mb-0 { margin-bottom: 0; } .mb-2 { margin-bottom: var(--s-2); } .mb-3 { margin-bottom: var(--s-3); }
.mb-4 { margin-bottom: var(--s-4); } .mb-5 { margin-bottom: var(--s-5); }
.mb-6 { margin-bottom: var(--s-6); } .mb-8 { margin-bottom: var(--s-8); }
.p-0 { padding: 0; } .p-3 { padding: var(--s-3); } .p-4 { padding: var(--s-4); } .p-5 { padding: var(--s-5); }

.d-none { display: none; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-block { display: block; }

/* Decorative separators */
.rule {
  display: flex; align-items: center; gap: var(--s-4);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ink-soft);
  margin: var(--s-7) 0 var(--s-4);
}
.rule::before, .rule::after {
  content: '';
  flex: 1;
  border-top: var(--bd-hair);
}
.rule .num { color: var(--hot); font-weight: 500; }

/* Asterisk decoration */
.asterisk {
  display: inline-block;
  color: var(--hot);
  font-family: var(--font-display);
  font-size: 1.3em;
  vertical-align: middle;
  transform: translateY(-2px);
}

/* Login splash — fills the viewport and centers the card */
body:has(.login-page) main { padding: 0 !important; }
body:has(.login-page) footer { display: none; }
.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: var(--s-5);
  position: relative;
}
.login-card {
  width: min(440px, 100%);
  background: var(--paper);
  border: var(--bd);
  padding: var(--s-8) var(--s-7);
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 2;
}
.login-card::before, .login-card::after {
  content: ''; position: absolute;
  width: 18px; height: 18px;
}
.login-card::before {
  background: var(--hot);
  top: -2px; left: -2px;
  border: var(--bd);
}
.login-card::after {
  background: var(--go);
  bottom: -2px; right: -2px;
  border: var(--bd);
}
.login-brand {
  font-family: var(--font-display-italic);
  font-style: italic;
  font-size: clamp(2.6rem, 6.5vw, 3.6rem);
  font-weight: 400;
  letter-spacing: -0.015em;
  line-height: 1;
  margin-bottom: var(--s-2);
  text-align: center;
}
.login-brand-sub {
  display: block;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.45em;
  color: var(--hot);
  margin-top: var(--s-3);
  font-weight: 500;
}
.login-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--ink-soft);
  text-align: center;
  margin-bottom: var(--s-7);
}

/* Session line item with day pill */
.day-pill {
  width: 56px;
  flex-shrink: 0;
  text-align: center;
  border: var(--bd);
  background: var(--paper-2);
  padding: 4px 6px;
}
.day-pill .day-num {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 500;
  line-height: 1;
  display: block;
}
.day-pill .day-mo {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-soft);
}

/* Wider variant for time-of-day display (e.g. 08:36 AM) */
.time-pill {
  min-width: 78px;
  flex-shrink: 0;
  text-align: center;
  border: var(--bd);
  background: var(--paper-2);
  padding: 6px 8px;
}
.time-pill .time-num {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 500;
  line-height: 1;
  display: block;
  letter-spacing: -0.02em;
}
.time-pill .time-ap {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--ink-soft);
  margin-top: 2px;
  display: block;
}

.session-line { display: flex; align-items: center; gap: var(--s-4); padding: var(--s-3) var(--s-4); border-bottom: var(--bd-hair); transition: background 0.12s; }
.session-line:last-child { border-bottom: none; }
.session-line:hover { background: var(--paper-2); }
.session-line .meta { flex: 1; min-width: 0; }
.session-line .topic { font-weight: 500; font-size: 1.05rem; line-height: 1.25; }
.session-line .sub { font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-soft); margin-top: 2px; letter-spacing: 0.04em; }

/* Batch tile */
.batch-tile {
  background: var(--paper);
  border: var(--bd);
  padding: var(--s-5);
  text-decoration: none !important;
  color: var(--ink);
  display: flex; flex-direction: column; gap: var(--s-2);
  transition: transform 0.18s, box-shadow 0.18s;
  position: relative;
  overflow: hidden;
}
.batch-tile:hover { transform: translate(-3px, -3px); box-shadow: var(--shadow); color: var(--ink); }
.batch-tile-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  line-height: 1.1;
  font-weight: 500;
  letter-spacing: -0.02em;
}
.batch-tile-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-soft);
}
.batch-tile-stat {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  margin-top: var(--s-3);
  display: flex; gap: var(--s-3);
}
.batch-tile-stat span strong { color: var(--ink); font-weight: 700; }

/* Track tags color-code */
.track-tag::before {
  content: '';
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  margin-right: 6px;
  vertical-align: middle;
  background: var(--ink-soft);
  margin-bottom: 2px;
}
.track-scratch::before { background: var(--hot); }
.track-python::before { background: var(--cool); }
.track-web::before { background: var(--go); }
.track-mixed::before { background: var(--sun); }

/* Floating navbar dot for student welcome */
.greeting {
  font-family: var(--font-display-italic);
  font-style: italic;
  font-size: clamp(2.7rem, 6.5vw, 4.2rem);
  letter-spacing: -0.01em;
  font-weight: 400;
  line-height: 1;
  margin-bottom: var(--s-2);
}
.greeting .name { color: var(--cool); }

/* Responsive masthead */
@media (max-width: 720px) {
  .masthead-inner { flex-wrap: wrap; gap: var(--s-3); }
  .nav-links { margin-left: 0; gap: var(--s-4); width: 100%; order: 3; padding-top: var(--s-2); border-top: var(--bd-hair); }
  .brand { font-size: 1.15rem; }
  .brand-tag { display: none; }
}