:root {
  --bg:        #fafaf8;
  --hero-bg:   #e8e3ef;
  --surface:   #ffffff;
  --ink:       #0f0f0f;
  --dim:       #6b7280;
  --rule:      #e5e7eb;
  --hl:        #ccff00;
  --hl-ink:    #0f0f0f;
  --tag:       #faff47;
  --tag-ink:   #0f0f0f;
  --green:     #00b478;
  --red:       #ff00aa;
  --amber:     #ffb020;
  /* fluro complementary pairs (bg / fg) */
  --f1-bg: #ccff00; --f1-fg: #ff00aa;  /* lime + magenta */
  --f2-bg: #faff47; --f2-fg: #0066ff;  /* yellow + electric blue */
  --f3-bg: #ff4800; --f3-fg: #00ffcc;  /* orange + cyan */
  --f4-bg: #00e5ff; --f4-fg: #ff4800;  /* cyan + orange */
  --f5-bg: #ff00aa; --f5-fg: #ccff00;  /* magenta + lime */
  --term1-bg:  #ff4800; --term1-ink: #fafaf8;
  --term2-bg:  #00e5ff; --term2-ink: #0f0f0f;
  --term3-bg:  #faff47; --term3-ink: #0f0f0f;
  --term4-bg:  #ccff00; --term4-ink: #0f0f0f;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.screen { display: none; }
.screen.active { display: block; }
.center-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 2rem; }

/* HIGHLIGHT */
.hl { background: var(--hl); color: var(--hl-ink); padding: 2px 8px 5px; font-style: italic; display: inline-block; line-height: 1; }

/* AUTH */
.auth-card { background: var(--surface); border: 1px solid var(--rule); padding: 2.75rem 2.75rem 2.25rem; max-width: 420px; width: 100%; }
.logo { font-size: 0.78rem; font-weight: 900; letter-spacing: 0.18em; text-transform: uppercase; color: var(--ink); }
.sub { font-size: 0.66rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--dim); margin-top: 0.55rem; }
.auth-card h2 { font-size: 1.95rem; font-weight: 900; letter-spacing: -0.035em; line-height: 1.0; margin: 1.8rem 0 1.6rem; color: var(--ink); }
.field { text-align: left; margin-bottom: 0.85rem; }
.field label { display: block; font-size: 0.64rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--dim); margin-bottom: 0.45rem; font-weight: 900; }
.field input { width: 100%; padding: 0.75rem 0.9rem; border: 1px solid var(--rule); background: var(--surface); font-family: inherit; font-size: 0.93rem; font-weight: 500; color: var(--ink); outline: none; transition: border-color 0.1s; }
.field input:focus { border-color: var(--ink); }
.btn-primary { width: 100%; padding: 0.85rem; background: var(--hl); color: var(--hl-ink); border: none; font-family: inherit; font-size: 0.95rem; font-weight: 900; letter-spacing: -0.005em; cursor: pointer; transition: background 0.1s, color 0.1s, font-style 0.1s, text-shadow 0.1s; margin-top: 0.5rem; }
.btn-primary:hover { background: var(--f5-bg); color: var(--f5-fg); font-style: italic; text-shadow: 0 0 12px #ccff0099; }
.btn-primary:disabled { background: var(--rule); color: var(--dim); cursor: default; font-style: normal; text-shadow: none; }
.auth-switch { margin-top: 1.4rem; font-size: 0.83rem; color: var(--dim); font-weight: 500; }
.auth-switch a { color: var(--ink); cursor: pointer; font-weight: 700; border-bottom: 1.5px solid var(--ink); padding-bottom: 1px; transition: all 0.1s; }
.auth-switch a:hover { background: var(--hl); border-color: var(--hl); font-style: italic; }
.msg { font-size: 0.82rem; min-height: 1.3em; margin-top: 0.6rem; font-weight: 600; }
.msg.error { color: var(--red); }
.msg.success { color: var(--green); }
.divider { display: flex; align-items: center; gap: 0.8rem; margin: 1.3rem 0; color: var(--dim); font-size: 0.62rem; font-weight: 900; letter-spacing: 0.18em; text-transform: uppercase; }
.divider::before, .divider::after { content: ''; flex: 1; height: 1px; background: var(--rule); }
.btn-secondary { width: 100%; padding: 0.8rem; background: transparent; color: var(--ink); border: 1px solid var(--rule); font-family: inherit; font-size: 0.85rem; font-weight: 700; cursor: pointer; transition: all 0.1s; }
.btn-secondary:hover { background: var(--ink); color: white; border-color: var(--ink); font-style: italic; }

/* HEADER */
header { background: var(--hero-bg); color: var(--ink); padding: 4rem 3rem 3rem; border-bottom: 1px solid var(--rule); display: flex; align-items: flex-end; justify-content: space-between; flex-wrap: wrap; gap: 2rem; }
.course-label { font-size: 0.66rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--dim); font-weight: 900; }
header h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); font-weight: 900; letter-spacing: -0.04em; line-height: 1.0; margin-top: 0.7rem; color: var(--ink); }
.tagline { color: var(--dim); font-size: 0.95rem; margin-top: 1rem; max-width: 500px; line-height: 1.6; font-weight: 500; }
.header-right { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.user-badge { display: flex; align-items: center; gap: 0.5rem; background: var(--surface); border: 1px solid var(--rule); padding: 0.5rem 0.85rem; font-size: 0.78rem; font-weight: 700; color: var(--ink); letter-spacing: -0.005em; }
.user-dot { width: 6px; height: 6px; background: var(--hl); }
.btn-outline { padding: 0.55rem 0.95rem; border: 1px solid var(--ink); background: transparent; color: var(--ink); font-family: inherit; font-size: 0.76rem; font-weight: 700; letter-spacing: 0.02em; cursor: pointer; transition: all 0.1s; }
.btn-outline:hover { background: var(--f3-bg); color: var(--f3-fg); border-color: var(--f3-bg); font-style: italic; text-shadow: 0 0 10px #00ffcc99; }

/* NOTICE BANNER */
.notice-banner {
  background: rgba(200, 30, 58, 0.10);
  color: #8b1a2b;
  padding: 0.85rem 3rem;
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  line-height: 1.45;
  border-bottom: 1px solid rgba(200, 30, 58, 0.25);
  box-shadow: inset 3px 0 0 #c81e3a;
}
.notice-banner strong { font-weight: 900; letter-spacing: -0.01em; }
[data-theme="dark"] .notice-banner {
  background: rgba(255, 80, 110, 0.10);
  color: #ff8aa0;
  border-bottom-color: rgba(255, 80, 110, 0.25);
  box-shadow: inset 3px 0 0 #ff506e;
}

/* INSPIRATIONAL QUOTE */
.title-row {
  display: flex;
  align-items: stretch;
  gap: 1.75rem;
  flex-wrap: wrap;
}
.title-row h1 { margin: 0; }
.inspirational-quote {
  position: relative;
  margin: 0;
  padding: 0.4rem 0 0.4rem 1.75rem;
  align-self: center;
  font-size: 1rem;
  font-style: italic;
  font-weight: 500;
  color: var(--fg);
  opacity: 0.78;
  line-height: 1.5;
  max-width: 460px;
}
.inspirational-quote::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15rem;
  bottom: 0.15rem;
  width: 2px;
  background: var(--fg);
  opacity: 0.25;
  border-radius: 2px;
}
.inspirational-quote cite {
  display: block;
  margin-top: 0.4rem;
  font-style: normal;
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg);
  opacity: 0.6;
}
@media (max-width: 720px) {
  .inspirational-quote { font-size: 0.9rem; padding-left: 1.25rem; }
}

/* NAV */
nav { background: var(--bg); border-bottom: 1px solid var(--rule); display: flex; padding: 0 3rem; }
.tab { padding: 1.05rem 1.4rem; cursor: pointer; font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 900; color: var(--dim); border-bottom: 2px solid transparent; margin-bottom: -1px; transition: background 0.1s, color 0.1s, font-style 0.1s, text-shadow 0.1s; user-select: none; }
.tab:hover { font-style: italic; }
.tab:nth-of-type(1):hover { background: var(--f1-bg); color: var(--f1-fg); text-shadow: 0 0 10px #ff00aa99; }
.tab:nth-of-type(2):hover { background: var(--f2-bg); color: var(--f2-fg); text-shadow: 0 0 10px #0066ff99; }
.tab:nth-of-type(3):hover { background: var(--f3-bg); color: var(--f3-fg); text-shadow: 0 0 10px #00ffcc99; }
.tab:nth-of-type(4):hover { background: var(--f5-bg); color: var(--f5-fg); text-shadow: 0 0 10px #ccff0099; }
.tab.active { color: var(--ink); border-bottom-color: var(--ink); }

main { max-width: 1200px; margin: 0 auto; padding: 3rem 3rem 4rem; }
.panel { display: none; }
.panel.active { display: block; }

/* SECTION HEAD */
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 2rem; flex-wrap: wrap; gap: 0.5rem; }
.section-head h2 { font-size: 2rem; font-weight: 900; letter-spacing: -0.035em; line-height: 1.0; }
.exam-countdown { display: inline-flex; align-items: baseline; gap: 0.75rem; background: var(--hl); color: var(--hl-ink); padding: 0.5rem 0.95rem 0.6rem; font-weight: 900; }
.exam-countdown .ec-label { font-size: 0.6rem; letter-spacing: 0.16em; text-transform: uppercase; opacity: 0.6; }
.exam-countdown .ec-num   { font-size: 1.05rem; letter-spacing: -0.01em; position: relative; padding-left: 0.75rem; }
.exam-countdown .ec-num::before { content: ''; position: absolute; left: 0; top: 0.05em; bottom: 0.05em; width: 1.5px; background: currentColor; opacity: 0.3; }
.exam-countdown.past      { background: var(--rule); color: var(--dim); }

/* SCHEDULE */
.term-block { margin-bottom: 2.5rem; border: 1px solid var(--rule); background: var(--surface); }
.term-label { font-weight: 900; font-size: 0.7rem; letter-spacing: 0.18em; text-transform: uppercase; padding: 0.75rem 1.2rem; border-bottom: 1px solid var(--rule); cursor: pointer; user-select: none; display: flex; align-items: center; justify-content: space-between; transition: opacity 0.1s; }
.term-label::after { content: '−'; font-size: 1.05rem; font-weight: 900; margin-left: 1rem; line-height: 1; }
.term-label:hover { opacity: 0.85; }
.term-block.collapsed .term-label { border-bottom: none; }
.term-block.collapsed .term-label::after { content: '+'; }
.term-block.collapsed .schedule-table,
.term-block.collapsed .sd-intro,
.term-block.collapsed .sd-list { display: none; }
.term-label.t1 { background: var(--term1-bg); color: var(--term1-ink); }
.term-label.t2 { background: var(--term2-bg); color: var(--term2-ink); }
.term-label.t3 { background: var(--term3-bg); color: var(--term3-ink); }
.term-label.t4 { background: var(--term4-bg); color: var(--term4-ink); }

.schedule-table { width: 100%; border-collapse: collapse; background: var(--surface); font-size: 0.88rem; }
.schedule-table th { background: var(--bg); padding: 0.75rem 1rem; text-align: left; font-size: 0.62rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--dim); font-weight: 900; border-bottom: 1px solid var(--rule); }
.schedule-table td { padding: 0.9rem 1rem; border-top: 1px solid var(--rule); vertical-align: top; color: var(--ink); font-weight: 500; }

.week-row { cursor: pointer; transition: background 0.08s; }
.week-row:hover td { background: var(--hero-bg); }
.week-row.open td { background: var(--hero-bg); }

/* CURRENT WEEK — highlight the row whose week_commencing covers today */
.week-row.current-week td { background: rgba(204, 255, 0, 0.18); }
.week-row.current-week td:first-child { box-shadow: inset 4px 0 0 var(--hl); }
.week-row.current-week:hover td,
.week-row.current-week.open td { background: rgba(204, 255, 0, 0.32); }
.term-label-text { display: inline-flex; align-items: center; gap: 0.55rem; }
.current-week-chip {
  display: inline-flex; align-items: center;
  padding: 0.15rem 0.5rem 0.25rem;
  background: var(--hl); color: var(--hl-ink);
  font-size: 0.58rem; font-weight: 900; letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer; transition: filter 0.1s;
}
.current-week-chip:hover { filter: brightness(0.92); }
.week-row td:first-child { position: relative; padding-left: 2.4rem; }
.week-row td:first-child::before {
  content: '+';
  position: absolute; left: 1rem; top: 50%; transform: translateY(-58%);
  font-size: 1.05rem; font-weight: 900; color: var(--ink);
  transition: transform 0.15s;
}
.week-row.open td:first-child::before { content: '−'; }

.file-drawer-row { display: none; }
.file-drawer-row.open { display: table-row; }
.file-drawer { background: var(--bg); border-top: 1px dashed var(--rule); padding: 1.2rem 1.4rem; }
.file-drawer-inner { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }
.file-chip {
  display: inline-flex; align-items: center; gap: 0.5rem;
  background: var(--surface); border: 1px solid var(--rule);
  padding: 0.55rem 0.9rem;
  font-size: 0.83rem; font-weight: 600; color: var(--ink);
  text-decoration: none; cursor: pointer;
  transition: all 0.1s;
}
.file-chip:hover { background: var(--hl); color: var(--hl-ink); border-color: var(--hl); font-style: italic; }
.file-chip-icon { font-size: 1rem; font-style: normal; }
.file-drawer-empty { font-size: 0.83rem; color: var(--dim); font-weight: 500; }
.file-drawer-loading { font-size: 0.83rem; color: var(--dim); font-weight: 500; }

.wk { font-weight: 800; color: var(--ink); white-space: nowrap; letter-spacing: -0.01em; }
.dt { color: var(--dim); font-size: 0.82rem; white-space: nowrap; font-weight: 600; }
.empty-state { text-align: center; padding: 3rem; color: var(--dim); font-weight: 500; }
.week-note {
  margin-top: 1rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  padding: 1rem 1.2rem;
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--ink);
  font-weight: 500;
}
.week-note strong { font-weight: 800; }
.week-note em { color: var(--dim); }
.week-note a { color: var(--ink); text-decoration: none; background: var(--hl); padding: 0 5px 2px; font-style: italic; font-weight: 700; }
.week-note a:hover { background: var(--ink); color: white; }

/* HOMEWORK */
.hw-progress-label { font-size: 0.64rem; font-weight: 900; letter-spacing: 0.16em; text-transform: uppercase; color: var(--dim); margin-bottom: 0.5rem; display: flex; justify-content: space-between; }
.hw-bar { background: var(--rule); height: 4px; overflow: hidden; margin-bottom: 2rem; }
.hw-bar-fill { height: 100%; background: var(--ink); transition: width 0.4s ease; }
.hw-list { display: flex; flex-direction: column; border-top: 1px solid var(--rule); }
.hw-item { display: flex; align-items: flex-start; gap: 1rem; background: var(--surface); border-bottom: 1px solid var(--rule); padding: 1rem 1.2rem; cursor: pointer; transition: background 0.08s; }
.hw-item:hover { background: var(--hero-bg); }
.hw-item.done { opacity: 0.5; }
.hw-item.done .hw-text { text-decoration: line-through; color: var(--dim); }
.hw-check { width: 18px; height: 18px; min-width: 18px; border: 1.5px solid var(--ink); display: flex; align-items: center; justify-content: center; font-size: 0.85rem; font-weight: 900; margin-top: 2px; background: var(--surface); transition: all 0.1s; }
.hw-item.done .hw-check { background: var(--hl); border-color: var(--hl); color: var(--hl-ink); }
.hw-text { font-size: 0.94rem; color: var(--ink); font-weight: 600; letter-spacing: -0.005em; }
.hw-tag { display: inline-block; font-size: 0.6rem; padding: 0.2rem 0.55rem 0.28rem; margin-top: 0.45rem; font-weight: 900; letter-spacing: 0.14em; text-transform: uppercase; }
.hw-tag.t1 { background: var(--term1-bg); color: var(--term1-ink); }
.hw-tag.t2 { background: var(--term2-bg); color: var(--term2-ink); }
.hw-tag.t3 { background: var(--term3-bg); color: var(--term3-ink); }
.hw-tag.t4 { background: var(--term4-bg); color: var(--term4-ink); }
.btn-ghost { margin-top: 1.5rem; padding: 0.55rem 1rem; border: 1px solid var(--rule); background: transparent; font-family: inherit; font-size: 0.74rem; font-weight: 700; letter-spacing: 0.04em; cursor: pointer; color: var(--dim); transition: all 0.1s; }
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); background: var(--surface); }

/* STUDY DESIGN TRACKER */
.sd-stack-bar { display: flex; height: 4px; background: var(--rule); overflow: hidden; margin-bottom: 2rem; }
.sd-fill { height: 100%; transition: width 0.4s ease; }
.sd-fill.green { background: var(--green); }
.sd-fill.amber { background: var(--amber); }
.sd-fill.red   { background: var(--red); }
.sd-intro { padding: 0.9rem 1.2rem; border-bottom: 1px solid var(--rule); color: var(--dim); font-size: 0.83rem; font-weight: 500; line-height: 1.55; background: var(--surface); }
.sd-list { display: flex; flex-direction: column; background: var(--surface); }
.sd-group-head { font-size: 0.62rem; font-weight: 900; letter-spacing: 0.18em; text-transform: uppercase; color: var(--dim); padding: 1.1rem 1.2rem 0.5rem; border-top: 1px solid var(--rule); background: var(--surface); }
.sd-item { display: flex; align-items: flex-start; gap: 1rem; padding: 0.95rem 1.2rem; border-top: 1px solid var(--rule); background: var(--surface); }
.sd-text { flex: 1; font-size: 0.92rem; line-height: 1.55; font-weight: 500; color: var(--ink); letter-spacing: -0.005em; }
.tl-pill { display: flex; gap: 6px; align-items: center; flex-shrink: 0; }
.tl { width: 18px; height: 18px; border: 1px solid; border-radius: 50%; padding: 0; cursor: pointer; transition: background 0.12s, transform 0.1s, box-shadow 0.12s; }
.tl:hover { transform: scale(1.2); }
/* Inactive: tinted fill + coloured border so each pill is recognisable at rest */
.tl.red   { border-color: var(--red);   background: rgba(255,   0, 170, 0.10); }
.tl.amber { border-color: var(--amber); background: rgba(255, 176,  32, 0.12); }
.tl.green { border-color: var(--green); background: rgba(  0, 180, 120, 0.10); }
/* Active: full saturation + soft glow ring */
.tl.red.active   { background: var(--red);   box-shadow: 0 0 0 2px rgba(255,   0, 170, 0.30); }
.tl.amber.active { background: var(--amber); box-shadow: 0 0 0 2px rgba(255, 176,  32, 0.34); }
.tl.green.active { background: var(--green); box-shadow: 0 0 0 2px rgba(  0, 180, 120, 0.30); }
.sd-summary-pills { display: inline-flex; gap: 0.5rem; align-items: center; }
.sd-summary-pill { display: inline-flex; align-items: center; gap: 4px; font-size: 0.7rem; font-weight: 700; color: var(--ink); letter-spacing: -0.005em; }
.sd-summary-pill::before { content: ''; width: 8px; height: 8px; border-radius: 50%; }
.sd-summary-pill.green::before { background: var(--green); }
.sd-summary-pill.amber::before { background: var(--amber); }
.sd-summary-pill.red::before   { background: var(--red); }
.sd-summary-pill.muted { color: var(--dim); }
.sd-summary-pill.muted::before { background: var(--rule); }

/* TRIAL EXAMS */
.te-table { width: 100%; border-collapse: collapse; background: var(--surface); font-size: 0.88rem; border: 1px solid var(--rule); }
.te-table th { background: var(--bg); padding: 0.75rem 1rem; text-align: left; font-size: 0.62rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--dim); font-weight: 900; border-bottom: 1px solid var(--rule); }
.te-table td { padding: 0.85rem 1rem; border-top: 1px solid var(--rule); vertical-align: middle; color: var(--ink); font-weight: 500; }
.te-table tr.holiday td.te-week::after { content: 'HOLIDAYS'; display: inline-block; font-size: 0.55rem; padding: 0.15rem 0.4rem 0.25rem; margin-left: 0.5rem; background: var(--term3-bg); color: var(--term3-ink); font-weight: 900; letter-spacing: 0.14em; vertical-align: middle; }
.te-paper-cell { display: inline-flex; align-items: center; gap: 0.5rem; margin-right: 1.1rem; flex-wrap: wrap; }
.te-check { width: 18px; height: 18px; min-width: 18px; border: 1.5px solid var(--ink); display: inline-flex; align-items: center; justify-content: center; font-size: 0.85rem; font-weight: 900; background: var(--surface); cursor: pointer; transition: all 0.1s; user-select: none; }
.te-check.done { background: var(--hl); border-color: var(--hl); color: var(--hl-ink); }
.te-paper-label { font-size: 0.85rem; font-weight: 700; letter-spacing: -0.005em; }
.te-paper-label.done { text-decoration: line-through; color: var(--dim); }
.te-papers { display: flex; flex-wrap: wrap; gap: 0.4rem 0; align-items: center; }
.btn-mistakes { padding: 0.3rem 0.6rem; background: transparent; border: 1px solid var(--rule); font-family: inherit; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.04em; cursor: pointer; color: var(--dim); margin-left: 0.4rem; transition: all 0.1s; }
.btn-mistakes:hover { border-color: var(--ink); color: var(--ink); background: var(--bg); }
.btn-mistakes.has-mistakes { color: var(--ink); border-color: var(--ink); background: var(--surface); }
.btn-mistakes .mistake-count { background: var(--red); color: white; padding: 1px 6px 2px; margin-left: 0.35rem; font-size: 0.65rem; font-weight: 900; }
.te-table td.te-year { font-weight: 800; color: var(--ink); white-space: nowrap; letter-spacing: -0.01em; }
.te-table td.te-week { color: var(--dim); font-size: 0.82rem; white-space: nowrap; font-weight: 600; }
.te-files-inline { display: inline-flex; flex-wrap: wrap; gap: 0.3rem; margin-left: 0.4rem; align-items: center; }
.te-file-chip {
  display: inline-flex; align-items: center; gap: 0.3rem;
  padding: 0.25rem 0.55rem;
  background: var(--surface); border: 1px solid var(--rule);
  font-size: 0.72rem; font-weight: 700; color: var(--ink);
  cursor: pointer; transition: all 0.1s; user-select: none;
  text-decoration: none;
}
.te-file-chip:hover { background: var(--hl); color: var(--hl-ink); border-color: var(--hl); font-style: italic; }
.te-file-chip .te-chip-icon { font-size: 0.92rem; font-style: normal; }
.te-files-empty { color: var(--dim); font-size: 0.72rem; font-style: italic; margin-left: 0.4rem; }

/* Admin: categorized slot drawer */
.te-slot-group { margin-bottom: 0.85rem; }
.te-slot-group:last-child { margin-bottom: 0; }
.te-slot-group-label {
  font-size: 0.6rem; font-weight: 900; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--dim);
  padding: 0.35rem 0; margin-bottom: 0.4rem;
  border-bottom: 1px solid var(--rule);
}
.te-slot {
  display: grid;
  grid-template-columns: 160px 1fr auto;
  align-items: center; gap: 0.8rem;
  padding: 0.45rem 0;
}
.te-slot + .te-slot { border-top: 1px dashed var(--rule); }
.te-slot-label { font-size: 0.78rem; font-weight: 700; color: var(--ink); letter-spacing: -0.005em; }
.te-slot-file { display: flex; align-items: center; gap: 0.5rem; font-size: 0.78rem; font-weight: 600; color: var(--ink); }
.te-slot-file .file-link { cursor: pointer; padding: 0.3rem 0.6rem; background: var(--surface); border: 1px solid var(--rule); transition: all 0.1s; }
.te-slot-file .file-link:hover { background: var(--hl); color: var(--hl-ink); border-color: var(--hl); font-style: italic; }
.te-slot-empty { font-size: 0.75rem; color: var(--dim); font-style: italic; }
.te-slot-actions { display: flex; gap: 0.4rem; align-items: center; }
.te-slot-actions input[type=file] { display: none; }
.te-slot-actions .btn-upload-slot {
  padding: 0.35rem 0.75rem; background: var(--ink); color: white;
  border: none; font-family: inherit; font-size: 0.7rem; font-weight: 900;
  cursor: pointer; letter-spacing: 0.04em; transition: all 0.1s;
}
.te-slot-actions .btn-upload-slot:hover { background: var(--hl); color: var(--hl-ink); font-style: italic; }
.te-slot-actions .btn-upload-slot:disabled { background: var(--rule); color: var(--dim); cursor: default; font-style: normal; }
.te-slot-status { font-size: 0.72rem; color: var(--dim); font-weight: 600; min-width: 1.5rem; }

/* MISTAKE BOOK MODAL */
.mb-modal { display: none; position: fixed; inset: 0; background: rgba(15,15,15,0.85); z-index: 2000; align-items: center; justify-content: center; padding: 2rem; }
.mb-modal.open { display: flex; }
.mb-inner { background: var(--surface); border: 1px solid var(--rule); width: 100%; max-width: 920px; max-height: 90vh; display: flex; flex-direction: column; }
.mb-header { background: var(--ink); color: white; padding: 0.85rem 1.2rem; display: flex; align-items: center; justify-content: space-between; font-size: 0.78rem; font-weight: 900; letter-spacing: 0.14em; text-transform: uppercase; }
.mb-close { background: transparent; border: none; color: white; font-size: 1.2rem; cursor: pointer; font-weight: 900; padding: 0 0.3rem; line-height: 1; transition: color 0.1s; }
.mb-close:hover { color: var(--hl); }
.mb-body { padding: 1rem 1.2rem; overflow-y: auto; flex: 1; background: var(--surface); }
.mb-empty { padding: 1.5rem; text-align: center; color: var(--dim); font-style: italic; font-weight: 500; }
.mb-table { width: 100%; border-collapse: collapse; font-size: 0.86rem; }
.mb-table th { background: var(--bg); padding: 0.5rem 0.6rem; text-align: left; font-size: 0.58rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--dim); font-weight: 900; border-bottom: 1px solid var(--rule); }
.mb-table td { padding: 0.4rem 0.5rem; border-top: 1px solid var(--rule); vertical-align: top; }
.mb-table textarea { width: 100%; min-height: 2.6rem; padding: 0.4rem 0.55rem; border: 1px solid var(--rule); background: var(--surface); font-family: inherit; font-size: 0.85rem; font-weight: 500; color: var(--ink); resize: vertical; outline: none; line-height: 1.4; }
.mb-table textarea:focus { border-color: var(--ink); }
.mb-footer { padding: 0.85rem 1.2rem; display: flex; justify-content: space-between; align-items: center; gap: 0.6rem; background: var(--bg); border-top: 1px solid var(--rule); flex-wrap: wrap; }

/* PRINT MISTAKE BOOK — only takes over the page when body has .printing-mistake-book */
#print-mistake-book { display: none; }
@media print {
  body.printing-mistake-book > *:not(#print-mistake-book) { display: none !important; }
  body.printing-mistake-book #print-mistake-book { display: block !important; padding: 1cm; font-family: 'Inter', sans-serif; color: #000; background: white; }
  body.printing-mistake-book #print-mistake-book h1 { font-size: 22pt; margin-bottom: 0.4rem; letter-spacing: -0.02em; }
  body.printing-mistake-book #print-mistake-book h2 { font-size: 13pt; margin-top: 1.2rem; margin-bottom: 0.35rem; border-bottom: 1.5px solid #000; padding-bottom: 0.2rem; page-break-after: avoid; }
  body.printing-mistake-book #print-mistake-book .pb-meta { color: #555; font-size: 9.5pt; margin-bottom: 1rem; }
  body.printing-mistake-book #print-mistake-book table { width: 100%; border-collapse: collapse; font-size: 9.5pt; margin-bottom: 0.6rem; page-break-inside: auto; }
  body.printing-mistake-book #print-mistake-book th { background: #eee; text-align: left; padding: 4px 6px; border: 1px solid #999; font-weight: 700; }
  body.printing-mistake-book #print-mistake-book td { padding: 4px 6px; border: 1px solid #999; vertical-align: top; }
  body.printing-mistake-book #print-mistake-book tr { page-break-inside: avoid; }
  body.printing-mistake-book #print-mistake-book .pb-empty { font-style: italic; color: #777; }
}

/* SPINNER */
.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--rule); border-top-color: var(--ink); border-radius: 50%; animation: spin 0.7s linear infinite; vertical-align: middle; margin-right: 8px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* MODAL */
.modal-overlay { display: none; position: fixed; inset: 0; background: rgba(15,15,15,0.85); z-index: 1000; align-items: center; justify-content: center; flex-direction: column; }
.modal-overlay.open { display: flex; }
.modal-bar { background: var(--ink); color: white; width: 92vw; max-width: 1100px; display: flex; align-items: center; justify-content: space-between; padding: 0.75rem 1.2rem; font-size: 0.82rem; }
.modal-title { font-weight: 700; letter-spacing: -0.01em; }
.modal-close { background: transparent; border: none; color: white; font-size: 1.2rem; cursor: pointer; line-height: 1; padding: 0 0.3rem; font-weight: 900; transition: color 0.1s; }
.modal-close:hover { color: var(--hl); }
.modal-frame { width: 92vw; max-width: 1100px; height: 80vh; border: none; background: white; }

/* ADMIN */
#screen-admin { background: var(--bg); min-height: 100vh; }
.admin-header { background: var(--ink); color: white; padding: 2rem 3rem; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
.admin-header h1 { font-size: 1.55rem; font-weight: 900; letter-spacing: -0.03em; color: white; }
.admin-badge { font-size: 0.6rem; letter-spacing: 0.18em; text-transform: uppercase; background: var(--hl); color: var(--hl-ink); padding: 0.3rem 0.6rem; margin-left: 0.7rem; vertical-align: middle; font-weight: 900; }
.admin-header .btn-outline { border-color: white; color: white; }
.admin-header .btn-outline:hover { background: white; color: var(--ink); }
.admin-main { max-width: 1300px; margin: 0 auto; padding: 3rem 3rem 4rem; }
.admin-section { background: var(--surface); border: 1px solid var(--rule); margin-bottom: 2.5rem; }
.admin-section-head { padding: 1rem 1.4rem; border-bottom: 1px solid var(--rule); display: flex; align-items: center; justify-content: space-between; background: var(--bg); flex-wrap: wrap; gap: 0.5rem; }
.admin-section-head h3 { font-size: 1.05rem; font-weight: 900; letter-spacing: -0.025em; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.admin-table th { background: var(--bg); padding: 0.6rem 0.8rem; text-align: left; font-size: 0.6rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--dim); font-weight: 900; border-bottom: 1px solid var(--rule); }
.admin-table td { padding: 0.5rem 0.8rem; border-top: 1px solid var(--rule); vertical-align: middle; }
.admin-table tr:hover:not(.admin-term-header) td { background: var(--bg); }
.admin-input, .admin-textarea { width: 100%; padding: 0.45rem 0.6rem; border: 1px solid var(--rule); background: var(--surface); font-family: inherit; font-size: 0.85rem; font-weight: 500; color: var(--ink); outline: none; }
.admin-input:focus, .admin-textarea:focus { border-color: var(--ink); }
.admin-textarea { min-height: 4.5rem; resize: vertical; line-height: 1.5; }
.admin-select { padding: 0.45rem 0.6rem; border: 1px solid var(--rule); background: var(--surface); font-family: inherit; font-size: 0.85rem; font-weight: 600; color: var(--ink); outline: none; }
.admin-select:focus { border-color: var(--ink); }
.btn-add { padding: 0.5rem 1rem; background: var(--ink); color: white; border: none; font-family: inherit; font-size: 0.76rem; font-weight: 900; cursor: pointer; transition: all 0.1s; }
.btn-add:hover { background: var(--hl); color: var(--hl-ink); font-style: italic; }
.btn-save { padding: 0.5rem 1rem; background: var(--hl); color: var(--hl-ink); border: none; font-family: inherit; font-size: 0.76rem; font-weight: 900; cursor: pointer; transition: all 0.1s; }
.btn-save:hover { background: var(--ink); color: white; font-style: italic; }
.btn-delete { padding: 0.3rem 0.55rem; background: transparent; color: var(--dim); border: 1px solid transparent; font-size: 0.92rem; font-weight: 900; cursor: pointer; transition: all 0.1s; }
.btn-delete:hover { background: var(--ink); color: white; }
.btn-files { padding: 0.4rem 0.75rem; background: var(--surface); color: var(--ink); border: 1px solid var(--ink); font-family: inherit; font-size: 0.74rem; font-weight: 700; cursor: pointer; white-space: nowrap; transition: all 0.1s; }
.btn-files:hover { background: var(--f4-bg); color: var(--f4-fg); border-color: var(--f4-bg); font-style: italic; text-shadow: 0 0 10px #ff480099; }
.save-status { font-size: 0.72rem; font-weight: 900; color: var(--hl-ink); margin-left: 0.5rem; opacity: 0; transition: opacity 0.3s; background: var(--hl); padding: 3px 8px 5px; letter-spacing: -0.005em; }
.save-status.show { opacity: 1; }
.new-row td { background: var(--hero-bg) !important; }

/* DRAFT (unpublished) schedule rows */
.draft-row > td { background: #fffbe6; }
.draft-row > td:first-child { box-shadow: inset 4px 0 0 var(--amber); }
.btn-publish { padding: 0.2rem 0.45rem; background: transparent; border: 1px solid transparent; font-family: inherit; font-size: 0.7rem; font-weight: 900; letter-spacing: 0.06em; cursor: pointer; transition: all 0.1s; line-height: 1; white-space: nowrap; }
.btn-publish.live  { color: var(--green); }
.btn-publish.draft { color: var(--amber); border-color: var(--amber); background: #fff7c2; }
.btn-publish:hover { background: var(--ink); color: white; border-color: var(--ink); }
.admin-term-count .draft-count { color: var(--amber); margin-left: 0.4rem; font-weight: 900; }

/* ADMIN TERM GROUPS — mirror student schedule term-block pattern */
.admin-term-header td {
  cursor: pointer; padding: 0.65rem 1rem; position: relative;
  font-weight: 900; font-size: 0.7rem; letter-spacing: 0.18em;
  text-transform: uppercase; user-select: none;
  border-top: 1px solid var(--rule);
}
.admin-term-header td::after {
  content: '−'; position: absolute; right: 1rem; top: 50%;
  transform: translateY(-55%); font-size: 1.05rem; font-weight: 900;
}
.admin-term-header.collapsed td::after { content: '+'; }
.admin-term-header.t1 td { background: var(--term1-bg); color: var(--term1-ink); }
.admin-term-header.t2 td { background: var(--term2-bg); color: var(--term2-ink); }
.admin-term-header.t3 td { background: var(--term3-bg); color: var(--term3-ink); }
.admin-term-header.t4 td { background: var(--term4-bg); color: var(--term4-ink); }
.admin-term-count { opacity: 0.7; font-weight: 700; margin-left: 0.6rem; letter-spacing: 0.1em; }
tr.admin-term-row.collapsed,
tr.admin-file-row.collapsed { display: none; }

/* ADMIN FILE PANEL */
.admin-file-row { display: none; background: var(--bg); }
.admin-file-row.open { display: table-row; }
.admin-file-panel { padding: 1rem 1.2rem; border-top: 1px dashed var(--rule); }
.admin-file-list { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.8rem; }
.admin-file-chip {
  display: inline-flex; align-items: center; gap: 0.4rem;
  background: var(--surface); border: 1px solid var(--rule);
  padding: 0.35rem 0.65rem; font-size: 0.8rem; font-weight: 600; color: var(--ink);
}
.admin-file-chip button { background: none; border: none; color: var(--dim); cursor: pointer; font-size: 0.92rem; font-weight: 900; padding: 0; line-height: 1; transition: color 0.1s; }
.admin-file-chip button:hover { color: var(--ink); }
.admin-upload-area { display: flex; align-items: center; gap: 0.7rem; flex-wrap: wrap; }
.admin-upload-area input[type=file] { font-size: 0.78rem; font-family: inherit; font-weight: 500; }
.btn-upload { padding: 0.4rem 0.85rem; background: var(--ink); color: white; border: none; font-family: inherit; font-size: 0.74rem; font-weight: 900; cursor: pointer; transition: all 0.1s; }
.btn-upload:hover { background: var(--hl); color: var(--hl-ink); font-style: italic; }
.btn-upload:disabled { background: var(--rule); color: var(--dim); cursor: default; font-style: normal; }
.upload-status { font-size: 0.76rem; color: var(--dim); font-weight: 600; }

/* NOTES EDITOR */
.btn-notes-edit { width: 100%; min-height: 2.4rem; text-align: left; padding: 0.5rem 0.7rem; background: var(--surface); border: 1px solid var(--rule); font-family: inherit; font-size: 0.82rem; font-weight: 500; color: var(--ink); cursor: pointer; transition: all 0.1s; line-height: 1.4; white-space: normal; }
.btn-notes-edit:hover { border-color: var(--ink); background: var(--bg); }
.notes-snippet { color: var(--ink); }
.notes-empty { color: var(--dim); font-weight: 700; font-style: italic; font-size: 0.78rem; letter-spacing: 0.02em; }

.notes-modal { display: none; position: fixed; inset: 0; background: rgba(15,15,15,0.85); z-index: 2000; align-items: center; justify-content: center; padding: 2rem; }
.notes-modal.open { display: flex; }
.notes-modal-inner { background: white; border: 1px solid var(--rule); width: 100%; max-width: 760px; max-height: 90vh; display: flex; flex-direction: column; }
.notes-modal-header { background: var(--ink); color: white; padding: 0.85rem 1.2rem; display: flex; align-items: center; justify-content: space-between; font-size: 0.7rem; font-weight: 900; letter-spacing: 0.18em; text-transform: uppercase; }
.notes-modal-close { background: transparent; border: none; color: white; font-size: 1.2rem; cursor: pointer; font-weight: 900; padding: 0 0.3rem; line-height: 1; transition: color 0.1s; }
.notes-modal-close:hover { color: var(--hl); }

.notes-toolbar { display: flex; gap: 0.4rem; padding: 0.7rem 1rem; border-bottom: 1px solid var(--rule); background: var(--bg); flex-wrap: wrap; }
.tb-btn { padding: 0.45rem 0.8rem; min-width: 2.2rem; background: white; border: 1px solid var(--rule); font-family: inherit; font-size: 0.84rem; font-weight: 700; color: var(--ink); cursor: pointer; transition: all 0.1s; }
.tb-btn:hover { background: var(--hl); border-color: var(--hl); color: var(--hl-ink); font-style: italic; }
.tb-bold { font-weight: 900; }
.tb-italic { font-style: italic; }
.tb-italic:hover { font-style: italic; }
.tb-underline { text-decoration: underline; }

#notes-editor { width: 100%; border: none; padding: 1rem 1.2rem; font-family: ui-monospace, 'SF Mono', Menlo, monospace; font-size: 0.9rem; line-height: 1.6; color: var(--ink); outline: none; resize: none; background: white; min-height: 200px; }

.notes-preview-label { font-size: 0.6rem; font-weight: 900; letter-spacing: 0.18em; text-transform: uppercase; color: var(--dim); padding: 0.7rem 1.2rem 0.4rem; background: var(--bg); border-top: 1px solid var(--rule); }
.notes-preview { padding: 0.6rem 1.2rem 1rem; font-size: 0.9rem; line-height: 1.6; color: var(--ink); background: var(--bg); flex: 1; overflow-y: auto; min-height: 80px; max-height: 220px; font-weight: 500; }
.notes-preview a { color: var(--ink); text-decoration: none; background: var(--hl); padding: 0 5px 2px; font-style: italic; font-weight: 700; }
.notes-preview img { max-width: 100%; height: auto; display: block; margin: 0.4rem 0; border: 1px solid var(--rule); }
.notes-preview .preview-empty { color: var(--dim); font-style: italic; font-weight: 500; }

.notes-modal-footer { padding: 0.85rem 1.2rem; display: flex; justify-content: space-between; align-items: center; gap: 0.6rem; background: white; border-top: 1px solid var(--rule); flex-wrap: wrap; }
.notes-hint { font-size: 0.7rem; color: var(--dim); font-weight: 500; }
.notes-modal-footer .footer-actions { display: flex; gap: 0.5rem; }

footer { text-align: center; padding: 2rem; font-size: 0.62rem; font-weight: 900; letter-spacing: 0.18em; text-transform: uppercase; color: var(--dim); border-top: 1px solid var(--rule); margin-top: 4rem; }

/* ─── ADMIN TABLE SCROLL WRAPPER ─── */
.admin-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* ─── COMPACT SCHEDULE ROW (admin) ─── */
.admin-table-sched .sched-summary-row td { padding: 0.55rem 0.8rem; vertical-align: middle; }
.admin-table-sched .sched-summary-row td.sched-cell-w,
.admin-table-sched .sched-summary-row td.sched-cell-date,
.admin-table-sched .sched-summary-row td.sched-cell-content { cursor: pointer; }
.admin-table-sched .sched-summary-row:hover td { background: var(--bg); }
.sched-w { display: inline-block; min-width: 1.6rem; padding: 0.15rem 0.45rem; background: var(--bg); border: 1px solid var(--rule); font-weight: 900; font-size: 0.85rem; text-align: center; }
.sched-cell-date { font-family: ui-monospace, 'SF Mono', Menlo, monospace; font-size: 0.82rem; color: var(--ink); font-weight: 600; white-space: nowrap; }
.sched-content-text { font-size: 0.9rem; font-weight: 600; color: var(--ink); line-height: 1.35; overflow: hidden; text-overflow: ellipsis; }
.sched-content-sub { font-size: 0.76rem; color: var(--dim); font-weight: 500; margin-top: 0.2rem; line-height: 1.35; overflow: hidden; text-overflow: ellipsis; }
.sched-content-tag { display: inline-block; padding: 1px 5px 2px; background: var(--rule); color: var(--ink); font-size: 0.6rem; font-weight: 900; letter-spacing: 0.1em; margin-right: 0.3rem; vertical-align: 1px; }
.sched-placeholder { color: var(--dim); font-style: italic; font-weight: 500; font-size: 0.82rem; }
.sched-cell-status { display: flex; flex-direction: column; gap: 0.3rem; align-items: flex-start; }
.sched-dots { display: flex; gap: 0.3rem; flex-wrap: wrap; align-items: center; }
.sched-dot { display: inline-flex; align-items: center; justify-content: center; min-width: 1.4rem; height: 1.4rem; padding: 0 0.35rem; background: var(--bg); border: 1px solid var(--rule); font-size: 0.7rem; color: var(--dim); line-height: 1; }
.sched-dot-text { font-weight: 900; letter-spacing: 0.04em; color: var(--ink); font-family: ui-monospace, 'SF Mono', Menlo, monospace; }
.sched-cell-actions { white-space: nowrap; text-align: right; }
.sched-cell-actions > * { vertical-align: middle; }
.btn-edit-row { padding: 0.35rem 0.75rem; background: var(--ink); color: white; border: none; font-family: inherit; font-size: 0.74rem; font-weight: 900; letter-spacing: 0.04em; cursor: pointer; transition: all 0.1s; margin-right: 0.3rem; }
.btn-edit-row:hover { background: var(--hl); color: var(--hl-ink); font-style: italic; }
.btn-row-arrow { padding: 0.2rem 0.4rem; background: transparent; color: var(--dim); border: 1px solid transparent; font-size: 0.78rem; font-weight: 900; cursor: pointer; transition: all 0.1s; }
.btn-row-arrow:hover { color: var(--ink); border-color: var(--rule); background: var(--bg); }
.btn-row-arrow-spacer { display: inline-block; width: 1.8rem; }

/* ─── SCHEDULE EDIT DRAWER ─── */
.sched-drawer { display: none; position: fixed; inset: 0; background: rgba(15,15,15,0.55); z-index: 1900; }
.sched-drawer.open { display: block; }
.sched-drawer-inner {
  position: absolute; top: 0; right: 0; bottom: 0;
  width: 100%; max-width: 520px;
  background: white; border-left: 1px solid var(--rule);
  display: flex; flex-direction: column;
  box-shadow: -8px 0 24px rgba(0,0,0,0.18);
  animation: drawerSlideIn 0.18s ease-out;
}
@keyframes drawerSlideIn { from { transform: translateX(100%); } to { transform: translateX(0); } }
.sched-drawer-header { background: var(--ink); color: white; padding: 0.95rem 1.2rem; display: flex; align-items: center; justify-content: space-between; font-size: 0.75rem; font-weight: 900; letter-spacing: 0.14em; text-transform: uppercase; }
.sched-drawer-body { flex: 1; overflow-y: auto; padding: 1.2rem 1.4rem; display: flex; flex-direction: column; gap: 1rem; background: var(--surface); }
.sched-drawer-row { display: flex; flex-direction: column; gap: 0.35rem; }
.sched-drawer-row-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; }
.sched-drawer-row-pair > div { display: flex; flex-direction: column; gap: 0.35rem; }
.sched-drawer-label { font-size: 0.62rem; font-weight: 900; letter-spacing: 0.16em; text-transform: uppercase; color: var(--dim); }
.sched-drawer-footer { padding: 0.9rem 1.2rem; display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; background: white; border-top: 1px solid var(--rule); }
.sched-drawer-footer .notes-hint { flex-basis: 100%; order: -1; margin-bottom: 0.2rem; }
.sched-drawer-delete { border: 1px solid var(--rule); }
.sched-drawer-delete:hover { background: var(--ink); color: white; border-color: var(--ink); }
body.drawer-open { overflow: hidden; }

@media (max-width: 720px) {
  .sched-drawer-inner { max-width: 100%; box-shadow: none; }
  .sched-drawer-row-pair { grid-template-columns: 1fr; }
  .admin-table-sched .sched-cell-actions { text-align: left; }
}

[data-theme="dark"] .sched-drawer-inner,
[data-theme="dark"] .sched-drawer-footer { background: var(--surface); color: var(--ink); }
[data-theme="dark"] .sched-drawer-header { background: #000; }

/* ─── MOBILE ─── */
@media (max-width: 720px) {
  /* CONTAINERS */
  main { padding: 1.5rem 1.1rem 2.5rem; }
  .center-wrap { padding: 1rem; }

  /* HEADER */
  header { padding: 1.4rem 1.2rem 1.6rem; gap: 1rem; flex-direction: column; align-items: stretch; }
  header h1 { font-size: 2.1rem; line-height: 1.05; margin-top: 0.4rem; letter-spacing: -0.035em; }
  .course-label { font-size: 0.6rem; }
  .tagline { margin-top: 0.6rem; font-size: 0.86rem; }
  .header-right { order: -1; width: 100%; justify-content: space-between; gap: 0.5rem; }
  .user-badge { padding: 0.4rem 0.7rem; font-size: 0.72rem; }
  .btn-outline { padding: 0.5rem 0.85rem; font-size: 0.7rem; }

  /* NOTICE BANNER */
  .notice-banner { padding: 0.7rem 1.2rem; font-size: 0.8rem; line-height: 1.4; }

  /* NAV */
  nav { padding: 0 0.6rem; }
  .tab { padding: 0.9rem 0.95rem; font-size: 0.68rem; letter-spacing: 0.12em; }

  /* SECTION HEAD */
  .section-head { margin-bottom: 1.4rem; }
  .section-head h2 { font-size: 1.55rem; letter-spacing: -0.03em; }

  /* AUTH CARD */
  .auth-card { padding: 2rem 1.4rem 1.6rem; }
  .auth-card h2 { font-size: 1.7rem; margin: 1.4rem 0 1.2rem; }
  .field input { font-size: 16px; }  /* prevents iOS zoom on focus */
  .btn-primary { padding: 0.85rem; font-size: 0.95rem; }

  /* SCHEDULE — card layout per row */
  .term-block { margin-bottom: 1.6rem; }
  .term-label { padding: 0.6rem 1rem; font-size: 0.62rem; letter-spacing: 0.16em; }
  .term-label::after { font-size: 0.95rem; }

  .schedule-table { font-size: 0.86rem; }
  .schedule-table thead { display: none; }
  .schedule-table tbody, .schedule-table tr, .schedule-table td { display: block; }
  .schedule-table tr { padding: 0.85rem 1rem 0.7rem 1rem; border-top: 1px solid var(--rule); position: relative; padding-right: 2.4rem; }
  .schedule-table tr:first-child { border-top: none; }
  .schedule-table td { padding: 0.3rem 0; border: none; }
  .schedule-table td:empty { display: none; }
  .schedule-table td::before {
    content: attr(data-label);
    display: block;
    font-size: 0.55rem;
    font-weight: 900;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--dim);
    margin-bottom: 0.15rem;
    line-height: 1.2;
  }
  .schedule-table td.wk { font-size: 1rem; font-weight: 900; padding-top: 0.2rem; padding-bottom: 0.4rem; letter-spacing: -0.01em; }
  .schedule-table td.wk::before { display: none; }
  .schedule-table td.dt { font-size: 0.78rem; }

  /* override desktop chevron — restore data-label content for first cell */
  .week-row td:first-child { padding-left: 0; }
  .week-row td:first-child::before {
    content: attr(data-label);
    position: static;
    transform: none;
    font-size: 0.55rem;
    font-weight: 900;
    color: var(--dim);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    margin-bottom: 0.15rem;
    line-height: 1.2;
  }
  .week-row.open td:first-child::before { content: attr(data-label); }
  .week-row td.wk:first-child::before { display: none; }

  /* +/- chevron moves to row top-right */
  .week-row::after {
    content: '+';
    position: absolute;
    top: 0.9rem;
    right: 1rem;
    font-size: 1.15rem;
    font-weight: 900;
    color: var(--ink);
    line-height: 1;
  }
  .week-row.open::after { content: '−'; }
  .week-row.open { background: var(--hero-bg); }
  .week-row.open td { background: transparent; }
  .week-row:hover td { background: transparent; }

  /* file drawer — needs higher specificity than .schedule-table tr to stay hidden by default on mobile */
  .schedule-table tr.file-drawer-row { display: none; }
  .schedule-table tr.file-drawer-row.open { display: block; }
  .file-drawer-row td { padding: 0; border: none; display: block; }
  .file-drawer-row td::before { display: none; }
  .file-drawer { padding: 0.85rem 1rem; }
  .file-chip { font-size: 0.78rem; padding: 0.5rem 0.8rem; }
  .btn-files { padding: 0.5rem 0.85rem; font-size: 0.72rem; }

  /* WEEK NOTE */
  .week-note { padding: 0.85rem 1rem; font-size: 0.83rem; }

  /* HOMEWORK */
  .hw-item { padding: 0.85rem 1rem; gap: 0.85rem; }
  .hw-text { font-size: 0.9rem; }
  .hw-progress-label { font-size: 0.58rem; }

  /* STUDY DESIGN TRACKER */
  .sd-intro { padding: 0.75rem 1rem; font-size: 0.8rem; }
  .sd-item { padding: 0.85rem 1rem; gap: 0.7rem; }
  .sd-text { font-size: 0.88rem; }
  .sd-group-head { padding: 0.95rem 1rem 0.45rem; font-size: 0.58rem; }
  .tl { width: 22px; height: 22px; }
  .tl-pill { gap: 8px; }

  /* TRIAL EXAMS — card layout per row */
  .te-table { font-size: 0.86rem; }
  .te-table thead { display: none; }
  .te-table tbody, .te-table tr, .te-table td { display: block; }
  .te-table tr { padding: 0.85rem 1rem 0.7rem 1rem; border-top: 1px solid var(--rule); }
  .te-table tr:first-child { border-top: none; }
  .te-table td { padding: 0.3rem 0; border: none; }
  .te-table td::before {
    content: attr(data-label);
    display: block;
    font-size: 0.55rem;
    font-weight: 900;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--dim);
    margin-bottom: 0.15rem;
    line-height: 1.2;
  }
  .te-table td.te-year { font-size: 1rem; font-weight: 900; padding-top: 0.2rem; padding-bottom: 0.4rem; letter-spacing: -0.01em; }
  .te-table td.te-year::before { display: none; }
  .te-table td.te-week { font-size: 0.78rem; }
  .te-paper-cell { margin-right: 0.5rem; flex-wrap: wrap; }
  .btn-mistakes { padding: 0.45rem 0.7rem; font-size: 0.72rem; }
  .te-files-inline { margin-left: 0; margin-top: 0.35rem; width: 100%; }
  .te-file-chip { padding: 0.35rem 0.6rem; font-size: 0.74rem; }
  .te-slot { grid-template-columns: 1fr; gap: 0.3rem; padding: 0.6rem 0; }
  .te-slot-actions { width: 100%; }

  /* MISTAKE MODAL */
  .mb-modal { padding: 0; }
  .mb-inner { max-width: 100%; max-height: 100vh; height: 100vh; border: none; }
  .mb-header { padding: 0.75rem 1rem; }
  .mb-body { padding: 0.7rem 0.9rem; }
  .mb-footer { padding: 0.7rem 0.9rem; }
  .mb-table { font-size: 0.82rem; }
  .mb-table thead { display: none; }
  .mb-table tbody, .mb-table tr, .mb-table td { display: block; }
  .mb-table tr { padding: 0.7rem 0; border-top: 1px solid var(--rule); }
  .mb-table tr:first-child { border-top: none; }
  .mb-table td { padding: 0.25rem 0; border: none; }
  .mb-table td::before {
    content: attr(data-label);
    display: block;
    font-size: 0.55rem;
    font-weight: 900;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--dim);
    margin-bottom: 0.2rem;
  }
  .mb-table textarea { font-size: 16px; }
  .mb-table td.mb-actions { display: flex; justify-content: flex-end; padding-top: 0.35rem; }
  .mb-table td.mb-actions::before { display: none; }

  /* FILE MODAL */
  .modal-overlay { padding: 0; }
  .modal-bar, .modal-frame { width: 100vw; max-width: 100vw; }
  .modal-bar { padding: 0.6rem 1rem; }
  .modal-frame { height: calc(100vh - 44px); }

  /* NOTES MODAL */
  .notes-modal { padding: 0; }
  .notes-modal-inner { max-width: 100%; max-height: 100vh; height: 100vh; border: none; }
  .notes-modal-header { padding: 0.7rem 1rem; }
  .notes-toolbar { padding: 0.55rem 0.7rem; gap: 0.35rem; }
  .tb-btn { padding: 0.6rem 0.8rem; min-width: 2.4rem; font-size: 0.82rem; }
  #notes-editor { min-height: 130px; padding: 0.85rem 1rem; font-size: 16px; }
  .notes-preview-label { padding: 0.55rem 1rem 0.3rem; }
  .notes-preview { padding: 0.5rem 1rem 0.8rem; max-height: 32vh; font-size: 0.86rem; }
  .notes-modal-footer { padding: 0.7rem 1rem; }
  .notes-hint { display: none; }
  .notes-modal-footer .footer-actions { width: 100%; justify-content: flex-end; }

  /* ADMIN */
  .admin-header { padding: 1.4rem 1.2rem; }
  .admin-header h1 { font-size: 1.2rem; letter-spacing: -0.02em; }
  .admin-badge { font-size: 0.55rem; padding: 0.25rem 0.5rem; margin-left: 0.5rem; }
  .admin-main { padding: 1.5rem 1rem 2.5rem; }
  .admin-section { margin-bottom: 1.6rem; }
  .admin-section-head { padding: 0.85rem 1rem; }
  .admin-section-head h3 { font-size: 1rem; }
  .admin-table { min-width: 920px; }
  .admin-table-sched { min-width: 0; }  /* compact schedule fits without horizontal scroll */
  .admin-input, .admin-textarea, .admin-select { font-size: 16px; }  /* prevents iOS zoom */

  /* FOOTER */
  footer { padding: 1.4rem 1rem; margin-top: 2.5rem; }

  /* THEME TOGGLE — smaller on mobile */
  .theme-toggle { width: 32px; height: 32px; top: 0.6rem; right: 0.6rem; font-size: 0.85rem; }
}

/* ─── THEME TOGGLE ─── */
.theme-toggle {
  position: fixed; top: 0.85rem; right: 0.85rem; z-index: 500;
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--rule);
  background: var(--surface);
  color: var(--ink);
  font-family: inherit;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.1s, color 0.1s, border-color 0.1s, transform 0.1s;
  user-select: none;
}
.theme-toggle:hover { background: var(--hl); border-color: var(--hl); color: var(--hl-ink); transform: rotate(-12deg); }
.theme-toggle::before { content: '☾'; }
[data-theme="dark"] .theme-toggle::before { content: '☀'; }

/* ─── DRAG & DROP ─── */
.drag-handle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 24px;
  cursor: grab;
  user-select: none;
  color: var(--dim);
  font-weight: 900;
  font-size: 0.95rem;
  letter-spacing: -0.15em;
  transition: color 0.1s;
  margin-right: 0.15rem;
}
.drag-handle:hover { color: var(--ink); }
.drag-handle:active { cursor: grabbing; }
tr.dragging { opacity: 0.4; }
tr.drop-target td { box-shadow: inset 0 3px 0 var(--hl); }

.drop-zone { position: relative; transition: background 0.1s, box-shadow 0.1s; }
.drop-zone.drag-over { background: var(--hero-bg); box-shadow: inset 0 0 0 2px var(--ink); }
.drop-hint { font-size: 0.72rem; font-weight: 700; color: var(--dim); letter-spacing: 0.04em; }

/* ─── DARK MODE ─── */
[data-theme="dark"] {
  --bg:        #0e0e10;
  --hero-bg:   #1c1726;
  --surface:   #18181b;
  --ink:       #fafaf8;
  --dim:       #9aa0a6;
  --rule:      #2a2a2e;
}
/* Surfaces with hardcoded white backgrounds */
[data-theme="dark"] .notes-modal-inner,
[data-theme="dark"] .notes-modal-footer,
[data-theme="dark"] #notes-editor,
[data-theme="dark"] .tb-btn { background: var(--surface); color: var(--ink); }
[data-theme="dark"] .tb-btn { border-color: var(--rule); }
/* "Strong" dark bars stay dark in dark mode (don't flip with --ink) */
[data-theme="dark"] .modal-bar,
[data-theme="dark"] .notes-modal-header,
[data-theme="dark"] .admin-header { background: #000; }
[data-theme="dark"] .btn-add { background: #000; color: #fff; }
[data-theme="dark"] .btn-save:hover,
[data-theme="dark"] .btn-secondary:hover,
[data-theme="dark"] .btn-upload:hover,
[data-theme="dark"] .btn-delete:hover { background: #000; color: #fff; }
/* Hovers that hardcode color: white but flip bg via --ink */
[data-theme="dark"] .week-note a:hover { background: #000; color: #fff; }
/* Admin header outline button: white-on-dark flips properly because the header stays black */
[data-theme="dark"] .admin-header .btn-outline { border-color: #fff; color: #fff; }
[data-theme="dark"] .admin-header .btn-outline:hover { background: #fff; color: #000; }
/* Modal preview keeps white background for documents */
/* (.modal-frame stays white intentionally) */
[data-theme="dark"] .auth-card { background: var(--surface); }
[data-theme="dark"] .new-row td { background: #2a2236 !important; }
/* Native select arrows on dark surfaces — let the browser handle, but ensure colors */
[data-theme="dark"] .admin-select option { background: var(--surface); color: var(--ink); }
/* Drop zone in dark mode: subtle hero-bg */
[data-theme="dark"] .drop-zone.drag-over { box-shadow: inset 0 0 0 2px var(--hl); }
/* Mistake modal in dark mode */
[data-theme="dark"] .mb-inner,
[data-theme="dark"] .mb-body { background: var(--surface); color: var(--ink); }
[data-theme="dark"] .mb-footer { background: var(--bg); }
[data-theme="dark"] .mb-header { background: #000; }
[data-theme="dark"] .mb-table textarea { background: var(--surface); color: var(--ink); border-color: var(--rule); }