/* ==========================================================================
   Academic Calendar — Design tokens
   Concept: a school ledger / notice-board. Dates are stamped ticket stubs;
   activities for one date are pinned together under a single stub instead
   of repeating the date on a new row.
   ========================================================================== */

:root {
  --paper: #fffbf4;
  --paper-alt: #e6e0d0;
  --card: #fbfaf6;
  --ink: #1b2a4a;
  --ink-soft: #4d5a7d;
  --ink-faint: #8891a8;
  --gold: #c9a227;
  --gold-dark: #a6841c;
  --teal: #3e7c7c;
  --line: #d9d2bd;
  --line-strong: #c3ba9e;
  --white: #ffffff;
  --shadow: 0 6px 20px rgba(27, 42, 74, 0.08);
  --shadow-lift: 0 12px 30px rgba(27, 42, 74, 0.14);
  --radius: 10px;
  --font-display: "Fraunces", "Georgia", serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  background-size: 100% 42px;
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.5;
}

a { color: inherit; }

img { max-width: 100%; display: block; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--white);
  padding: 10px 16px;
  z-index: 100;
}
.skip-link:focus { left: 8px; top: 8px; }

/* ---------- header / masthead ---------- */

.masthead {
  background:
    radial-gradient(ellipse 900px 300px at 15% -40%, rgba(201,162,39,0.22), transparent 60%),
    radial-gradient(ellipse 700px 260px at 100% 120%, rgba(62,124,124,0.28), transparent 60%),
    var(--ink);
  color: var(--paper);
  padding: 28px 24px 22px;
  border-bottom: 6px solid var(--gold);
  position: relative;
}

.masthead-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.masthead-eyebrow {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 6px;
}

.masthead h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  margin: 0;
  letter-spacing: 0.01em;
}

.masthead p.tagline {
  margin: 6px 0 0;
  color: #c7cee3;
  font-size: 1.2rem;
}

.masthead-meta {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: #aeb7d3;
}

.masthead-meta strong {
  display: block;
  color: var(--white);
  font-size: 1.2rem;
}

/* ---------- stats strip ---------- */

.stats {
  max-width: 1120px;
  margin: -26px auto 0;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  position: relative;
  z-index: 2;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
  border-color: var(--gold);
}

.stat-card .num {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1;
}

.stat-card .label {
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-top: 4px;
}

/* ---------- layout shell ---------- */

.shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 34px 24px 80px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  align-items: start;
}

/* ---------- month rail (folder tabs) ---------- */

.month-rail {
  position: sticky;
  top: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.month-rail h2 {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  margin: 0 0 8px 4px;
}

.month-tab {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  background: var(--paper-alt);
  border: 1px solid var(--line-strong);
  border-right: none;
  border-radius: 8px 0 0 8px;
  padding: 9px 12px;
  font-family: var(--font-body);
  font-size: 1.2rem;
  color: var(--ink-soft);
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.month-tab .count {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--ink-faint);
}

.month-tab:hover { transform: translateX(-2px); color: var(--ink); }

.month-tab.active {
  background: var(--card);
  color: var(--ink);
  font-weight: 600;
  border-color: var(--gold);
  box-shadow: var(--shadow);
  transform: translateX(-4px);
}
.month-tab.active .count { color: var(--gold-dark); }

/* ---------- filter / search bar ---------- */

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 22px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--line-strong);
}

.search-box {
  flex: 1 1 220px;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 10px 14px 10px 34px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--card);
  font-family: var(--font-body);
  font-size: 1.2rem;
  color: var(--ink);
}
.search-box input:focus {
  outline: 2px solid var(--teal);
  outline-offset: 1px;
}
.search-box svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 14px;
  height: 14px;
  color: var(--ink-faint);
}

.chip {
  border: 1px solid var(--line-strong);
  background: var(--card);
  color: var(--ink-soft);
  padding: 7px 13px;
  border-radius: 999px;
  font-size: 1.2rem;
  font-family: var(--font-body);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}
.chip .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--ink-faint);
}
.chip.active {
  background: var(--ink);
  color: var(--white);
  border-color: var(--ink);
  box-shadow: 0 3px 10px rgba(27,42,74,0.25);
  transform: translateY(-1px);
}
.chip:hover:not(.active) { border-color: var(--ink-soft); transform: translateY(-1px); }

/* ---------- timeline of ledger entries ---------- */

.timeline { position: relative; }

.timeline::before {
  content: "";
  position: absolute;
  left: 64px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom, var(--line-strong) 0 6px, transparent 6px 12px
  );
}

.entry {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 18px;
  margin-bottom: 22px;
  position: relative;
  animation: entryIn 0.5s ease backwards;
  animation-delay: calc(var(--i, 0) * 0.045s);
}

@keyframes entryIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.entry.is-past { opacity: 0.55; }
.entry.is-today .stub { border-color: var(--gold); box-shadow: 0 0 0 3px rgba(201,162,39,0.25); }

/* the date "ticket stub" — signature element */
.stub {
  background: var(--ink);
  color: var(--paper);
  border-radius: 10px;
  border: 2px solid var(--ink);
  padding: 10px 8px 12px;
  text-align: center;
  position: relative;
  height: fit-content;
  font-family: var(--font-mono);
  z-index: 1;
}
.stub .day {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1;
  color: var(--white);
}
.stub .mon {
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gold);
  margin-top: 2px;
}
.stub .yr {
  font-size: 1.2rem;
  color: #aeb7d3;
}
.stub .dow {
  font-size: 1.2rem;
  color: #aeb7d3;
  margin-top: 4px;
  border-top: 1px dashed #3d4a6c;
  padding-top: 4px;
}
.stub .range {
  font-size: 1.2rem;
  color: var(--gold);
  margin-top: 2px;
}
/* perforation notches */
.stub::before, .stub::after {
  content: "";
  position: absolute;
  width: 12px; height: 12px;
  background: var(--paper);
  border-radius: 50%;
  top: 50%;
  transform: translateY(-50%);
}
.stub::before { left: -7px; }
.stub::after { right: -7px; }

.today-flag {
  position: absolute;
  top: -9px;
  right: -6px;
  background: var(--gold);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 700;
}

/* card holding ALL activities that share this date */
.entry-card {
  background: var(--card);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}
.entry:hover .entry-card {
  box-shadow: var(--shadow-lift);
  transform: translateY(-2px);
  border-color: var(--line-strong);
}

.activity {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 18px;
  transition: background 0.15s ease;
}
.activity:hover { background: rgba(201,162,39,0.06); }
.activity + .activity { border-top: 1px dashed var(--line); }

.activity .bullet {
  width: 10px; height: 10px;
  border-radius: 50%;
  margin-top: 6px;
  flex-shrink: 0;
}

.activity .body { flex: 1; min-width: 0; }

.activity h3 {
  margin: 0 0 3px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--ink);
}

.activity p {
  margin: 0;
  font-size: 1.2rem;
  color: var(--ink-soft);
}

.tag-row {
  margin-top: 6px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tag {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: 999px;
  color: var(--white);
}

.tag.grade {
  background: transparent;
  color: var(--ink-faint);
  border: 1px solid var(--line-strong);
  text-transform: none;
  letter-spacing: 0;
}

.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--ink-soft);
  font-family: var(--font-body);
}
.empty-state .glyph { font-size: 1.2rem; margin-bottom: 10px; }

footer.site-footer {
  text-align: center;
  padding: 22px;
  font-size: 1.2rem;
  color: var(--ink-soft);
  border-top: 1px solid var(--line-strong);
}
footer.site-footer a { color: var(--teal); text-decoration: none; }
footer.site-footer a:hover { text-decoration: underline; }

/* ---------- responsive ---------- */

@media (max-width: 820px) {
  .shell { grid-template-columns: 1fr; }
  .month-rail {
    position: static;
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 6px;
  }
  .month-tab { border-radius: 8px; border-right: 1px solid var(--line-strong); white-space: nowrap; }
  .stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .entry { grid-template-columns: 64px 1fr; gap: 10px; }
  .stub .day { font-size: 1.2rem; }
  .timeline::before { left: 32px; }
  .masthead-meta { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; animation: none !important; }
}