/* ============================================================
   Sixth Year — design tokens
   Light by default, dark when the phone asks for it, and either
   one forced by data-theme on <html>.
   ============================================================ */

:root {
  --bg: #f4f2ed;
  --surface: #ffffff;
  --surface-2: #efece4;
  --surface-3: #e3ded3;
  --border: rgba(20, 33, 61, 0.10);
  --border-strong: rgba(20, 33, 61, 0.18);
  --text: #14213d;
  --dim: #5a6478;
  --faint: #6a7383;

  /* Navy carries anything interactive; gold is the highlight. Gold is too pale
     for text on a light ground, so --gold fills shapes and --info writes words. */
  --accent: #14213d;
  --accent-ink: #f4f2ed;
  --accent-soft: rgba(20, 33, 61, 0.09);
  --gold: #d9a441;
  --good: #2e8b57;
  --info: #8a6414;
  --info-soft: rgba(217, 164, 65, 0.20);
  --warn: #a3470b;
  --warn-soft: rgba(180, 83, 14, 0.14);
  --danger: #c2333c;
  --danger-soft: rgba(194, 51, 60, 0.12);

  --r-lg: 18px;
  --r: 13px;
  --r-sm: 10px;
  --shadow: 0 1px 2px rgba(20, 33, 61, 0.05), 0 8px 24px -14px rgba(20, 33, 61, 0.30);
  --shadow-lift: 0 12px 40px -12px rgba(20, 33, 61, 0.38);
  --nav-h: 60px;
  --gutter: 16px;
  --maxw: 640px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e1526;
    --surface: #141c31;
    --surface-2: #1c2740;
    --surface-3: #27334f;
    --border: rgba(244, 242, 237, 0.10);
    --border-strong: rgba(244, 242, 237, 0.20);
    --text: #eceff6;
    --dim: #a0aac0;
    --faint: #7f8aa3;

    /* Navy is the ground here, so its readable form does the interacting. */
    --accent: #9db0e0;
    --accent-ink: #0e1526;
    --accent-soft: rgba(157, 176, 224, 0.16);
    --gold: #d9a441;
    --good: #4ccf8f;
    --info: #e7c579;
    --info-soft: rgba(231, 197, 121, 0.16);
    --warn: #e39a4a;
    --warn-soft: rgba(227, 154, 74, 0.16);
    --danger: #ff8189;
    --danger-soft: rgba(255, 129, 137, 0.14);
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.45);
    --shadow-lift: 0 18px 50px -18px rgba(0, 0, 0, 0.8);
  }
}

:root[data-theme="dark"] {
  --bg: #0e1526;
  --surface: #141c31;
  --surface-2: #1c2740;
  --surface-3: #27334f;
  --border: rgba(244, 242, 237, 0.10);
  --border-strong: rgba(244, 242, 237, 0.20);
  --text: #eceff6;
  --dim: #a0aac0;
  --faint: #7f8aa3;

  /* Navy is the ground here, so its readable form does the interacting. */
  --accent: #9db0e0;
  --accent-ink: #0e1526;
  --accent-soft: rgba(157, 176, 224, 0.16);
  --gold: #d9a441;
  --good: #4ccf8f;
  --info: #e7c579;
  --info-soft: rgba(231, 197, 121, 0.16);
  --warn: #e39a4a;
  --warn-soft: rgba(227, 154, 74, 0.16);
  --danger: #ff8189;
  --danger-soft: rgba(255, 129, 137, 0.14);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.45);
  --shadow-lift: 0 18px 50px -18px rgba(0, 0, 0, 0.8);
}

/* ============================================================
   Base
   ============================================================ */

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  overscroll-behavior-y: contain;
  padding-bottom: calc(var(--nav-h) + env(safe-area-inset-bottom) + 12px);
}

button, input, select, textarea {
  font-family: inherit;
  color: inherit;
  -webkit-tap-highlight-color: transparent;
}
button { touch-action: manipulation; }

h1, h2, h3 { margin: 0; font-weight: 640; letter-spacing: -0.012em; }
h2 { font-size: 16px; }
h3 { font-size: 14px; }
p { margin: 0; }

::selection { background: var(--accent-soft); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.muted { color: var(--dim); }
.small { font-size: 13px; }
.tiny { font-size: 12px; }
.grow { flex: 1; }
.spacer { flex: 1; }
.nowrap { white-space: nowrap; }

/* ============================================================
   Shell
   ============================================================ */

.shell-top {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
}
/* A phone held sideways is too short to keep the header pinned: pinned, it and
   the tab bar left a third to a half of the screen for the page itself. There it
   scrolls away with the page instead. */
@media (max-height: 520px) {
  .shell-top { position: relative; }
}
header.top {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: calc(14px + env(safe-area-inset-top)) var(--gutter) 12px;
}
header.top .titles { min-width: 0; flex: 1; }
header.top .title { font-size: 21px; font-weight: 700; letter-spacing: -0.02em; }
header.top .sub {
  color: var(--dim); font-size: 12.5px; margin-top: 1px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.hbtn {
  position: relative;
  flex: 0 0 auto;
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  box-shadow: var(--shadow);
}
.hbtn:active { transform: scale(0.94); }
.hbtn svg { grid-area: 1 / 1; width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.hbtn .dot {
  position: absolute; top: 8px; right: 9px;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--danger);
  border: 2px solid var(--surface);
  display: none;
}
.hbtn.alert .dot { display: block; }
.hbtn.on { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); background: var(--accent-soft); }

/* Theme toggle shows the mode it will switch to */
#btnTheme .sun { display: none; }
#btnTheme.is-dark .sun { display: block; }
#btnTheme.is-dark .moon { display: none; }

/* Now / next class bar ------------------------------------- */

.nowbar {
  position: relative;
  display: flex; align-items: center; gap: 11px;
  width: min(var(--maxw), calc(100% - var(--gutter) * 2));
  margin: 0 auto 10px;
  padding: 10px 12px 11px;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--surface);
  box-shadow: var(--shadow);
  text-align: left;
  cursor: pointer;
  overflow: hidden;
}
.nowbar[hidden] { display: none; }
.nowbar .lead {
  flex: 0 0 auto;
  padding: 3px 8px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent);
  font-size: 10.5px; font-weight: 680; text-transform: uppercase; letter-spacing: 0.07em;
}
.nowbar.upcoming .lead { background: var(--info-soft); color: var(--info); }
.nowbar .info { flex: 1; min-width: 0; }
.nowbar .nm {
  display: block; font-size: 14.5px; font-weight: 620;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.nowbar .sub2 {
  display: block; margin-top: 1px; color: var(--dim); font-size: 12px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.nowbar .til {
  flex: 0 0 auto; color: var(--dim);
  font-size: 12.5px; font-weight: 600; font-variant-numeric: tabular-nums;
}
.nowbar .fill {
  position: absolute; left: 0; bottom: 0; height: 3px;
  background: var(--accent); border-radius: 0 3px 3px 0;
  transition: width 0.4s ease;
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter) 8px;
}

.view { display: none; }
.view.active { display: block; animation: rise 0.2s ease both; }
@keyframes rise { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.stack > * + * { margin-top: 12px; }

/* Bottom navigation ---------------------------------------- */

nav.tabs {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 40;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 2px;
  padding: 6px 6px env(safe-area-inset-bottom);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: saturate(1.5) blur(14px);
  -webkit-backdrop-filter: saturate(1.5) blur(14px);
  border-top: 1px solid var(--border);
}
nav.tabs button {
  min-height: 48px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px;
  padding: 4px 0 5px;
  border: 0; border-radius: var(--r-sm);
  background: none;
  color: var(--faint);
  /* Six labels have to share the width: on a small phone with larger text they
     stop growing with the text rather than pushing "Setup" off the screen. */
  font-size: min(10px, calc(3.1vw / var(--zoom))); font-weight: 550; letter-spacing: 0.01em;
  white-space: nowrap;
  cursor: pointer;
}
nav.tabs button .ico {
  display: grid; place-items: center;
  width: min(40px, 100%); height: 26px; border-radius: 999px;
  transition: background 0.18s ease, color 0.18s ease;
}
nav.tabs button svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
nav.tabs button.active { color: var(--accent); }
nav.tabs button.active .ico { background: var(--accent-soft); }

@media (min-width: 700px) and (max-width: 899.98px) {
  :root { --maxw: 720px; }
  nav.tabs {
    left: 50%; transform: translateX(-50%);
    width: min(var(--maxw), 100%);
    border: 1px solid var(--border);
    border-bottom: 0;
    border-radius: var(--r-lg) var(--r-lg) 0 0;
  }
}

/* ============================================================
   Wide screens: the tab bar becomes a sidebar and the content
   spreads across the whole window instead of a phone-width column.
   ============================================================ */

nav.tabs .brand { display: none; }

@media (min-width: 900px) {
  :root { --sidebar: 232px; }

  body { padding-bottom: 0; padding-left: var(--sidebar); min-height: calc(100dvh / var(--zoom)); }

  header.top { max-width: none; padding: 22px 28px 14px; }
  header.top .title { font-size: 24px; }
  main { max-width: none; padding: 0 28px 32px; }
  .nowbar { width: calc(100% - 56px); margin: 0 28px 16px; }

  nav.tabs {
    top: 0; bottom: 0; right: auto;
    width: var(--sidebar);
    grid-template-columns: 1fr;
    grid-auto-rows: max-content;
    align-content: start;
    gap: 3px;
    padding: 18px 12px calc(18px + env(safe-area-inset-bottom));
    border-top: 0;
    border-right: 1px solid var(--border);
    background: var(--surface);
  }
  nav.tabs .brand {
    display: flex; align-items: center; gap: 9px;
    padding: 4px 12px 18px;
    font-size: 15px; font-weight: 680; letter-spacing: -0.015em;
  }
  nav.tabs .brand img { width: 26px; height: 26px; border-radius: 7px; }
  nav.tabs button {
    flex-direction: row; justify-content: flex-start;
    gap: 12px; min-height: 44px; padding: 0 12px;
    border-radius: var(--r);
    font-size: 14px; font-weight: 560;
  }
  nav.tabs button:hover { background: var(--surface-2); color: var(--text); }
  nav.tabs button .ico { width: 24px; height: 24px; border-radius: var(--r-sm); }
  nav.tabs button.active { background: var(--accent-soft); }
  nav.tabs button.active .ico { background: none; }

  /* Card stacks and grouped lists pack into columns rather than grid rows: a grid
     row is as tall as its tallest card, which left dead space under short ones. */
  .stack, #hwList, #planList {
    columns: 320px;
    column-gap: 16px;
  }
  .stack > *, #hwList > *, #planList > * {
    break-inside: avoid;
    -webkit-column-break-inside: avoid;
    margin: 0 0 16px;
  }
  .stack > * + *, .card + .card { margin-top: 0; }
  .group .section-title { margin-top: 0; }
  .group .card + .card, .group .day-head { margin-top: 10px; }
  .group .day-head:first-child { margin-top: 0; }
  .toolbar { max-width: 520px; }
  .seg { max-width: 420px; }
  #planTimetable, #planSyllabus, #view-plan > .card { max-width: 760px; }
  .timer-card { max-width: 420px; }
  .modal-back { padding: 32px; }
}

@media (min-width: 1500px) {
  .stack, #hwList, #planList { columns: 360px; }
}

/* ============================================================
   Cards and lists
   ============================================================ */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 16px;
  box-shadow: var(--shadow);
}
.card + .card { margin-top: 12px; }
.card.flush { padding: 8px 16px; }

.card-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 10px;
  margin-bottom: 12px;
}
.card-head h2 { flex: 1; min-width: 0; }
.card-head .side { color: var(--dim); font-size: 12.5px; white-space: nowrap; }

.link {
  color: var(--accent); font-size: 13px; font-weight: 550;
  background: none; border: 0; padding: 0; cursor: pointer; white-space: nowrap;
}

.section-title {
  color: var(--dim);
  font-size: 12.5px; font-weight: 620; letter-spacing: -0.005em;
  margin: 20px 2px 8px;
}
.empty { color: var(--dim); font-size: 13.5px; padding: 6px 0 2px; }
.hint { color: var(--dim); font-size: 13px; margin-bottom: 12px; }

/* Rows ------------------------------------------------------ */

.item {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--border);
}
.item:first-child { border-top: 0; padding-top: 2px; }
.item:last-child { padding-bottom: 2px; }

.item .tick {
  flex: 0 0 auto;
  width: 24px; height: 24px; margin-top: 1px;
  border: 1.8px solid var(--border-strong);
  border-radius: 8px;
  background: none; cursor: pointer; position: relative;
  transition: background 0.15s ease, border-color 0.15s ease;
}
.item .tick.on { background: var(--accent); border-color: var(--accent); }
.item .tick.on::after {
  content: ""; position: absolute; left: 7px; top: 3px;
  width: 5px; height: 10px;
  border: solid var(--accent-ink); border-width: 0 2.4px 2.4px 0;
  transform: rotate(42deg);
}

.item .body {
  flex: 1; min-width: 0;
  background: none; border: 0; padding: 0; margin: 0;
  text-align: left; font: inherit; color: inherit; cursor: pointer;
}
.item .body .t { font-weight: 560; line-height: 1.35; word-break: break-word; }
.item.done .body .t { text-decoration: line-through; color: var(--faint); }
.item .meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
  margin-top: 5px; color: var(--dim); font-size: 12.5px;
}
.item .note {
  margin-top: 5px; color: var(--dim); font-size: 12.5px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

/* Inline-block rather than flex so a long subject, teacher or college name can
   end in "…" at the edge of its row instead of running off the screen. */
.pill {
  display: inline-block; max-width: 100%;
  overflow: hidden; text-overflow: ellipsis; vertical-align: middle;
  padding: 3px 9px; border-radius: 999px;
  background: var(--surface-2); color: var(--dim);
  font-size: 11.5px; font-weight: 550; white-space: nowrap;
}
.pill .dot { display: inline-block; width: 7px; height: 7px; margin-right: 5px; vertical-align: middle; border-radius: 50%; background: currentColor; }
.pill.late { background: var(--danger-soft); color: var(--danger); }
.pill.soon { background: var(--warn-soft); color: var(--warn); }
.pill.ok { background: var(--accent-soft); color: var(--accent); }

.icon-btn {
  flex: 0 0 auto;
  width: 34px; height: 34px; margin: -4px -6px -4px 0;
  display: grid; place-items: center;
  border: 0; border-radius: 50%;
  background: none; color: var(--faint);
  font-size: 17px; line-height: 1; cursor: pointer;
}
.icon-btn:hover { background: var(--surface-2); color: var(--text); }

/* Small controls keep their look but get a thumb-sized tap area, sized to stay
   inside the gap to the next control so they never take its taps. */
.rag, .icon-btn, .card-head .link, .sec-head .link, .sec-intro .link, #btnFocus { position: relative; }
.item .tick::before, .rag::before, .icon-btn::before {
  content: ""; position: absolute; left: 50%; top: 50%;
  width: 44px; height: 44px; transform: translate(-50%, -50%);
}
.card-head .link::before, .sec-head .link::before, .sec-intro .link::before, #btnFocus::before {
  content: ""; position: absolute; left: 0; right: 0; top: 50%;
  height: 40px; transform: translateY(-50%);
}

/* ============================================================
   Buttons and forms
   ============================================================ */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--r);
  background: var(--surface);
  color: var(--text);
  font-size: 14.5px; font-weight: 570;
  cursor: pointer;
  transition: transform 0.06s ease, background 0.15s ease;
}
.btn:active { transform: scale(0.985); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.subtle { background: var(--surface-2); border-color: transparent; }
.btn.ghost { background: none; border-color: transparent; color: var(--dim); }
.btn.danger { color: var(--danger); border-color: var(--danger-soft); background: none; }
.btn.small { min-height: 36px; padding: 7px 12px; font-size: 13px; border-radius: var(--r-sm); }
.btn.block { width: 100%; }

.row { display: flex; flex-wrap: wrap; gap: 8px; }
.row.end { justify-content: flex-end; }
.toolbar { display: flex; gap: 8px; align-items: center; margin: 4px 0 14px; }

label.field { display: block; }
label.field + .field, label.field + .grid2, .grid2 + .field { margin-top: 12px; }
.grid2 > label.field + label.field { margin-top: 0; }   /* grid gap handles the spacing */
label.field > span {
  display: block; margin-bottom: 6px;
  color: var(--dim); font-size: 12.5px; font-weight: 550;
}

input, select, textarea {
  width: 100%;
  min-height: 46px;
  padding: 11px 12px;
  background: var(--surface-2);
  border: 1px solid transparent;
  border-radius: var(--r);
  font-size: 16px;               /* 16px keeps iOS from zooming on focus */
  outline: none;
  transition: border-color 0.15s ease, background 0.15s ease;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); background: var(--surface); }
textarea { min-height: 76px; resize: vertical; line-height: 1.5; }
select {
  appearance: none; -webkit-appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--dim) 50%), linear-gradient(135deg, var(--dim) 50%, transparent 50%);
  background-position: calc(100% - 17px) 50%, calc(100% - 12px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 32px;
}
input[type="checkbox"] { width: auto; min-height: 0; accent-color: var(--accent); transform: scale(1.25); margin: 0 2px; }
input[type="date"], input[type="time"], input[type="datetime-local"] { min-width: 0; }

/* auto-fit rather than a media query, so paired fields also collapse when the
   larger text sizes shrink the space available */
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }

.switch {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  min-height: 50px; padding: 8px 0;
  border-top: 1px solid var(--border);
}
.switch:first-of-type { border-top: 0; }
.switch > span:first-child { font-size: 14.5px; }
.switch .ctl { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
.switch .ctl input[type="time"] { width: 118px; min-height: 40px; padding: 8px 10px; font-size: 14px; }

/* ============================================================
   Today
   ============================================================ */

.hero {
  background:
    radial-gradient(120% 140% at 100% 0%, var(--info-soft) 0%, transparent 60%),
    var(--surface);
}
.hero .count { display: flex; align-items: flex-end; gap: 9px; margin: 2px 0 6px; }
.hero .days { font-size: 46px; font-weight: 720; line-height: 0.95; letter-spacing: -0.035em; }
.hero .unit { color: var(--dim); font-size: 13.5px; padding-bottom: 4px; }

.track { height: 7px; border-radius: 999px; background: var(--surface-3); overflow: hidden; }
.track > i { display: block; height: 100%; border-radius: 999px; background: var(--accent); transition: width 0.35s ease; }
.track.info > i { background: var(--gold); }
.track-label { margin-top: 7px; color: var(--dim); font-size: 12.5px; }

.banner {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px;
  border-radius: var(--r-lg);
  background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  color: var(--text);
  font-size: 13.5px;
  margin-bottom: 12px;
}
.banner button { margin-left: auto; flex: 0 0 auto; }
.banner.warn {
  background: var(--danger-soft);
  border-color: color-mix(in srgb, var(--danger) 35%, transparent);
}

/* Today's Start card: what one tap will do */
.start-next { display: flex; flex-direction: column; gap: 2px; margin-top: 12px; }
.start-next:empty { display: none; }
.start-next .t { font-size: 14.5px; font-weight: 600; line-height: 1.35; }
.start-next .meta { color: var(--dim); font-size: 12.5px; line-height: 1.45; }

/* Planner blocks -------------------------------------------- */

.block {
  display: flex; align-items: center; gap: 11px;
  padding: 11px 12px; margin-top: 8px;
  background: var(--surface-2);
  border-radius: var(--r);
}
.block:first-child { margin-top: 0; }
.block .chip { width: 4px; align-self: stretch; border-radius: 999px; flex: 0 0 auto; }
.block .time { flex: 0 0 auto; width: 44px; color: var(--dim); font-size: 13px; font-variant-numeric: tabular-nums; }
.block .nm { flex: 1; min-width: 0; font-size: 14px; font-weight: 560; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.block .nm .focus {
  display: -webkit-box; -webkit-box-orient: vertical; -webkit-line-clamp: 2; overflow: hidden;
  margin-top: 1px; font-size: 12px; font-weight: 500; line-height: 1.35; color: var(--info); white-space: normal;
}
.block .len { color: var(--dim); font-size: 12.5px; white-space: nowrap; }

.day-head {
  display: flex; align-items: center; justify-content: space-between;
  margin: 18px 2px 8px;
}
.day-head .d { font-size: 13.5px; font-weight: 620; }
.day-head .d em { font-style: normal; color: var(--accent); }
.day-head .side { color: var(--faint); font-size: 12.5px; }
.day-free { color: var(--faint); font-size: 13px; padding: 2px 2px 6px; }

/* ============================================================
   Timetable
   ============================================================ */

.seg {
  display: grid; grid-auto-flow: column; grid-auto-columns: 1fr;
  gap: 3px; padding: 3px;
  margin: 4px 0 14px;
  background: var(--surface-2);
  border-radius: var(--r);
}
.seg button {
  min-height: 38px;
  border: 0; border-radius: var(--r-sm);
  background: none; color: var(--dim);
  font-size: 13.5px; font-weight: 570;
  cursor: pointer;
}
.seg button.active {
  background: var(--surface); color: var(--text);
  box-shadow: var(--shadow);
}

.chips { display: flex; gap: 6px; margin-bottom: 12px; overflow-x: auto; padding-bottom: 2px; }
.chips::-webkit-scrollbar { display: none; }
.chip-btn {
  flex: 1 0 auto; min-width: 46px; min-height: 40px;
  padding: 8px 10px;
  border: 1px solid var(--border); border-radius: var(--r-sm);
  background: var(--surface); color: var(--dim);
  font-size: 13px; font-weight: 570;
  cursor: pointer;
}
.chip-btn.active { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.chip-btn .n { display: block; font-size: 10px; font-weight: 550; opacity: 0.75; }

.tt-row {
  display: flex; align-items: center; gap: 11px;
  width: 100%;
  padding: 11px 0;
  border: 0; border-top: 1px solid var(--border);
  background: none; color: inherit; text-align: left;
  font: inherit; cursor: pointer;
}
.tt-row:first-child { border-top: 0; }
.tt-row .tt-time {
  flex: 0 0 46px; width: 46px;
  color: var(--dim); font-size: 12.5px; font-variant-numeric: tabular-nums; line-height: 1.3;
}
.tt-row .tt-time b { display: block; color: var(--text); font-size: 13px; font-weight: 600; }
.tt-row .tt-body { flex: 1; min-width: 0; }
.tt-row .tt-body .t {
  display: flex; align-items: center; gap: 7px;
  font-size: 14.5px; font-weight: 570;
}
.tt-row .tt-body .t .swatch { width: 8px; height: 8px; border-radius: 3px; flex: 0 0 auto; }
.tt-row .tt-body .t.free { color: var(--faint); font-weight: 500; }
.tt-row .meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 5px; }
.tt-row .chev { flex: 0 0 auto; color: var(--faint); font-size: 18px; line-height: 1; }
.tt-row.brk { cursor: default; }
.tt-row.brk .tt-body .t { color: var(--faint); font-weight: 500; font-size: 13.5px; }
.tt-row.live { background: var(--accent-soft); border-radius: var(--r); padding-inline: 10px; margin-inline: -10px; }

.slot-row {
  display: flex; align-items: center; gap: 10px;
  width: 100%; padding: 11px 0;
  border: 0; border-top: 1px solid var(--border);
  background: none; color: inherit; text-align: left; font: inherit; cursor: pointer;
}
.slot-row:first-child { border-top: 0; }
.slot-row .nm { flex: 1; min-width: 0; font-size: 14px; font-weight: 550; }
.slot-row .tm { color: var(--dim); font-size: 13px; font-variant-numeric: tabular-nums; }

/* ============================================================
   Syllabus
   ============================================================ */

/* Sections that fold to one line: the book's contents and each strand. Closed,
   a strand still shows its count and one dot per topic in its rating colour. */
.sec.card.flush { padding: 0 16px; }
.sec-head {
  display: flex; align-items: center; gap: 12px;
  width: 100%; min-height: 56px; padding: 12px 0; margin: 0;
  border: 0; background: none; color: inherit; font: inherit; text-align: left;
  cursor: pointer;
}
.sec-head.static { cursor: default; }
.sec-main { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.sec-t { font-size: 14.5px; font-weight: 620; line-height: 1.3; }
.sec-head:not(.static):hover .sec-t { color: var(--accent); }
.sec-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px;
  color: var(--dim); font-size: 12.5px; line-height: 1.35;
}
.sec-head .chev,
.subs-head .chev {
  flex: 0 0 auto; width: 8px; height: 8px; margin: 0 6px 0 2px;
  border-right: 2px solid var(--dim); border-bottom: 2px solid var(--dim);
  transform: rotate(-45deg); transition: transform 0.15s ease;
}
.sec.open > .sec-head .chev { transform: rotate(45deg); }
.sec:not(.open) > .sec-body { display: none; }
.sec-body { border-top: 1px solid var(--border); padding: 2px 0 6px; }
.sec.off .sec-t { color: var(--dim); }
.sec.off .topic-row { opacity: 0.45; }

.dots { display: inline-flex; flex-wrap: wrap; gap: 3px; }
.dots i { width: 7px; height: 7px; border-radius: 50%; box-shadow: inset 0 0 0 1.5px var(--border-strong); }
.dots i.c1 { background: var(--danger); box-shadow: none; }
.dots i.c2 { background: var(--gold); box-shadow: none; }
.dots i.c3 { background: var(--good); box-shadow: none; }

.sec-toggle {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  min-height: 44px; padding: 6px 0;
  color: var(--dim); font-size: 13px; cursor: pointer;
}
.sec-intro { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 10px 0 4px; }
.sec-intro .hint { margin: 0; }
.vol-head { margin: 14px 0 2px; color: var(--dim); font-size: 12.5px; font-weight: 620; }
.chapters { margin-top: 2px; }

.topic-row {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--border);
}
.topic-row:first-child { border-top: 0; }
.topic-row .body { flex: 1; min-width: 0; }
.topic-row .t { font-size: 14px; font-weight: 560; line-height: 1.35; }
.topic-row .meta { margin-top: 2px; color: var(--dim); font-size: 12.5px; line-height: 1.45; overflow-wrap: anywhere; }
.topic-row .foot { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 10px; margin-top: 6px; }
.topic-row .status { min-width: 0; color: var(--faint); font-size: 12px; }
.topic-row .hx { color: var(--info); font-weight: 560; white-space: nowrap; }
.topic-row .ch { flex: 0 0 auto; width: 92px; margin: 0; }
.topic-row .ch input {
  min-height: 36px; padding: 4px 8px;
  font-size: 12.5px; text-align: center; font-variant-numeric: tabular-nums;
}

/* The parts of a chapter, each with a rating menu (Study screen and the contents card) */
.subs-wrap { margin-top: 2px; }
.subs-title {
  display: flex; justify-content: space-between; align-items: baseline; gap: 8px; flex-wrap: wrap;
  margin: 4px 0 2px; font-size: 13px; font-weight: 600; color: var(--dim);
}
.subs-title .side { font-size: 12px; font-weight: 500; }
.subs-chap { padding: 8px 0 2px; border-top: 1px solid var(--border); }
.subs-chap:first-of-type { border-top: 0; }
.subs-head {
  display: flex; align-items: center; gap: 10px; width: 100%; min-height: 40px;
  padding: 2px 0; margin: 0; border: 0; background: none;
  font: inherit; font-size: 14px; font-weight: 560; color: inherit; text-align: left;
  cursor: pointer; border-radius: 8px;
}
.subs-head:not(.static):hover .t { color: var(--accent); }
.subs-head.static { cursor: default; }
.subs-head .maps { display: block; margin-top: 1px; color: var(--info); font-size: 12px; font-weight: 500; line-height: 1.4; }
.subs-chap.open .subs-head .chev { transform: rotate(45deg); }
.subs-head .n {
  flex: 0 0 28px; width: 28px; height: 28px;
  display: grid; place-items: center;
  border-radius: 8px; background: var(--surface-2);
  font-size: 12.5px; font-weight: 650; font-variant-numeric: tabular-nums;
}
.subs-head .t { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.subs-head .side { color: var(--dim); font-size: 12px; font-weight: 500; white-space: nowrap; }
.subs { margin-top: 2px; }
.sub-row {
  display: flex; align-items: center; gap: 10px;
  padding: 6px 0; margin: 0;
  border-top: 1px dashed var(--border);
}
.sub-row:first-child { border-top: 0; }
.sub-row .t { flex: 1; min-width: 0; font-size: 13.5px; line-height: 1.4; }
.sub-row select.sub-rate {
  flex: 0 0 auto; width: 138px; min-height: 36px;
  padding: 6px 28px 6px 10px; font-size: 13px;
  border-left: 3px solid var(--border-strong);
}
.sub-rate.c1 { border-left-color: var(--danger); }
.sub-rate.c2 { border-left-color: var(--gold); }
.sub-rate.c3 { border-left-color: var(--good); }
@media (max-width: 400px) {
  .sub-row { flex-wrap: wrap; }
  .sub-row select.sub-rate { width: 100%; }
}
.topic-row .icon-btn { margin-top: 3px; }

/* Confidence: tap to cycle not rated → shaky → getting there → solid */
.rag {
  flex: 0 0 auto;
  width: 26px; height: 26px; margin-top: 3px;
  border: 2px solid var(--border-strong); border-radius: 50%;
  background: none; cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.06s ease;
}
.rag:active { transform: scale(0.9); }
.rag.c1 { background: var(--danger); border-color: var(--danger); }
.rag.c2 { background: var(--gold); border-color: var(--gold); }
.rag.c3 { background: var(--good); border-color: var(--good); }

/* A subject's ratings as one bar: solid, getting there, shaky, then the unrated rest. */
.rag-bar { display: flex; height: 7px; border-radius: 999px; overflow: hidden; background: var(--surface-3); }
.rag-bar i { display: block; height: 100%; transition: width 0.35s ease; }
.rag-bar .c1 { background: var(--danger); }
.rag-bar .c2 { background: var(--gold); }
.rag-bar .c3 { background: var(--good); }

.rag-legend {
  display: flex; flex-wrap: wrap; gap: 6px 14px;
  margin-top: 8px; color: var(--dim); font-size: 12px;
}
.rag-legend i {
  display: inline-block; width: 10px; height: 10px; border-radius: 50%;
  margin-right: 5px; vertical-align: -1px;
}

/* ============================================================
   Study timer
   ============================================================ */

.timer-card { text-align: center; }
.timer-card .seg { margin: 0 auto 14px; max-width: 320px; }
.dial {
  position: relative; width: min(224px, calc(62vw / var(--zoom))); aspect-ratio: 1; margin: 4px auto 18px;
  container-type: inline-size;   /* the time below scales with the dial */
}
.dial svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.dial .track-ring { stroke: var(--surface-3); }
.dial .prog { stroke: var(--accent); stroke-linecap: round; transition: stroke-dashoffset 0.4s linear; }
.dial.break .prog { stroke: var(--gold); }
.dial .readout { position: absolute; inset: 0; display: grid; place-content: center; gap: 4px; text-align: center; }
.dial .time { font-size: clamp(34px, 11vw, 44px); font-size: clamp(20px, 18.5cqi, 44px); font-weight: 700; font-variant-numeric: tabular-nums; letter-spacing: -0.03em; }
.dial .mode { color: var(--faint); font-size: 11.5px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.14em; }
/* Three equal buttons in a row while they fit; when the space is too narrow
   (small phones with larger text) the last drops to its own line rather than
   pushing off the side of the screen. */
.timer-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.timer-actions .btn { flex: 1 1 0; padding-inline: 8px; white-space: nowrap; }

/* ============================================================
   Focus mode — the timer takes over the screen
   ============================================================ */

.focus-subject { display: none; color: var(--dim); font-size: 14px; margin-bottom: 4px; }
.focus-note { display: none; margin: 14px auto 0; max-width: 280px; color: var(--faint); font-size: 13px; }
#btnFocusExit { display: none; }

body.focus-on { overflow: hidden; }
body.focus-on .shell-top,
body.focus-on nav.tabs,
body.focus-on #timerSetupCard,
body.focus-on #sessionsCard,
body.focus-on #timerModeSeg,
body.focus-on #btnFocus { display: none !important; }
body.focus-on main { padding: 0; max-width: none; }
/* The view's entry animation touches transform, which would otherwise make it the
   containing block for the fixed card below and trap it in a corner. */
body.focus-on .view.active { animation: none; }
body.focus-on .timer-card {
  position: fixed; inset: 0; z-index: 80;
  max-width: none; margin: 0; border: 0; border-radius: 0;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  justify-content: safe center;   /* if it ever overflows, from the top and scrollable */
  overflow-y: auto;
  background: var(--bg); box-shadow: none;
  padding: 24px;
}
/* The dial also gives way to the height, so on a phone held sideways the
   buttons and "Leave focus mode" stay on the screen. */
body.focus-on .dial {
  width: min(340px, calc(68vw / var(--zoom)), calc(100dvh / var(--zoom) - 330px));
  min-width: 96px;
  margin-bottom: 22px;
}
body.focus-on .timer-actions { width: min(380px, calc(88vw / var(--zoom))); }
body.focus-on .focus-subject { display: block; }
body.focus-on .focus-note { display: block; }
body.focus-on #btnFocusExit { display: inline-flex; }
body.focus-on .modal-back { z-index: 90; }
/* A phone held sideways: the "phone face down" note goes, and the dial takes
   what height is left. */
@media (orientation: landscape) and (max-height: 520px) {
  body.focus-on .dial { width: min(340px, calc(68vw / var(--zoom)), calc(100dvh / var(--zoom) - 210px)); margin-bottom: 14px; }
  body.focus-on .focus-note { display: none; }
}
.modal .subs-wrap { margin-top: 6px; }

/* ============================================================
   Reading comfort
   ============================================================ */

/* The larger text sizes zoom the whole page. Zoom also multiplies anything sized
   from the screen (vw, dvh), so those are divided by --zoom wherever they appear,
   or a 90%-high sheet would come out 112% high and lose its top off the screen. */
:root { --zoom: 1; }
:root[data-text="large"] { --zoom: 1.12; }
:root[data-text="larger"] { --zoom: 1.25; }
:root[data-text] body { zoom: var(--zoom); }
:root[data-font="readable"] body {
  font-family: "Atkinson Hyperlegible", Verdana, Tahoma, sans-serif;
  letter-spacing: 0.008em;
  line-height: 1.62;
}
:root[data-font="readable"] .item .body .t,
:root[data-font="readable"] .tt-row .tt-body .t { letter-spacing: 0; }
/* Its letters are wider, so the bottom tab labels allow for that to keep
   "Homework" in its slot (the sidebar on wide screens has room to spare). */
@media (max-width: 899.98px) {
  :root[data-font="readable"] nav.tabs button { font-size: min(10px, calc(2.55vw / var(--zoom))); letter-spacing: 0; }
}

/* ============================================================
   Results and CAO courses
   ============================================================ */

.res-row {
  display: flex; align-items: center; gap: 11px;
  width: 100%; padding: 11px 0;
  border: 0; border-top: 1px solid var(--border);
  background: none; color: inherit; text-align: left; font: inherit; cursor: pointer;
}
.res-row:first-child { border-top: 0; }
.res-row .body { flex: 1; min-width: 0; }
.res-row .t { display: block; font-size: 14.5px; font-weight: 560; }
.res-row .meta { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 4px; }
.res-row .score {
  flex: 0 0 auto; text-align: right;
  font-size: 15px; font-weight: 660; font-variant-numeric: tabular-nums;
}
.res-row .score small { display: block; color: var(--dim); font-size: 11.5px; font-weight: 550; }
.trend { font-size: 11.5px; font-weight: 620; }
.trend.up { color: var(--info); }
.trend.down { color: var(--danger); }

.course-row .gap { font-size: 12.5px; font-weight: 620; }
.course-row .gap.hit { color: var(--info); }
.course-row .gap.near { color: var(--warn); }
.course-row .gap.miss { color: var(--danger); }

#pointsSrc { max-width: 340px; margin-bottom: 12px; }

/* ============================================================
   Stats
   ============================================================ */

.week { display: flex; align-items: flex-end; gap: 6px; height: 124px; }
.week .col { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; gap: 7px; height: 100%; }
.week .col .stem { width: 100%; min-height: 4px; border-radius: 7px 7px 4px 4px; background: var(--accent-soft); }
.week .col .stem.has { background: var(--accent); }
.week .col.today .stem { background: var(--gold); }
.week .col .lbl { color: var(--faint); font-size: 11px; }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
@media (max-width: 359px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat { padding: 12px 8px; border-radius: var(--r); background: var(--surface-2); text-align: center; }
.stat b { display: block; font-size: 19px; font-weight: 680; letter-spacing: -0.02em; }
.stat span { display: block; margin-top: 2px; color: var(--dim); font-size: 11.5px; line-height: 1.3; }

.subject-row { display: flex; align-items: center; gap: 10px; padding: 8px 0; }
.subject-row .nm {
  flex: 0 0 96px; width: 96px;
  font-size: 13.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.subject-row .track { flex: 1; }
.subject-row .val { flex: 0 0 auto; width: 58px; text-align: right; color: var(--dim); font-size: 12.5px; font-variant-numeric: tabular-nums; }
.subject-row .lvl { flex: 0 0 auto; color: var(--faint); font-size: 11.5px; width: 22px; }
.subject-row select { flex: 1; min-height: 40px; padding: 8px 10px; font-size: 15px; }
/* CAO rows: one line while they fit; on a narrow screen (or with larger text) the
   grade menu and points move under the subject name instead of being squeezed
   until the grade cannot be read. */
#pointsRows .subject-row { flex-wrap: wrap; row-gap: 6px; }
#pointsRows .subject-row .nm { flex: 1 1 84px; min-width: 0; }
#pointsRows .subject-row select { flex: 1 0 76px; padding-right: 30px; }
#pointsRows .subject-row .grow { flex: 1 1 120px; min-width: 0; overflow-wrap: anywhere; }
#pointsRows .subject-row .val { width: auto; min-width: 44px; }

/* ============================================================
   Sheet (modal)
   ============================================================ */

.modal-back {
  position: fixed; inset: 0; z-index: 60;
  display: flex; align-items: flex-end; justify-content: center;
  background: rgba(9, 13, 18, 0.5);
  backdrop-filter: blur(2px);
  animation: fade 0.15s ease;
}
.modal-back[hidden] { display: none !important; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

.modal {
  width: 100%; max-width: 520px;
  max-height: calc(90dvh / var(--zoom));
  display: flex; flex-direction: column;
  background: var(--surface);
  border-radius: 22px 22px 0 0;
  box-shadow: var(--shadow-lift);
  animation: sheet 0.22s cubic-bezier(0.2, 0.9, 0.3, 1);
  overflow: hidden;
}
@keyframes sheet { from { transform: translateY(24px); } to { transform: none; } }

.modal .grab {
  flex: 0 0 auto;
  width: 38px; height: 4px; margin: 9px auto 2px;
  border-radius: 999px; background: var(--surface-3);
}
.modal .sheet-body {
  flex: 1 1 auto;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 10px var(--gutter) 4px;
}
.modal .sheet-body h2 { margin-bottom: 14px; }
.modal .sheet-foot {
  flex: 0 0 auto;
  display: flex; align-items: center; gap: 8px;
  padding: 12px var(--gutter) calc(12px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.modal .sheet-foot .btn { flex: 1; }
.modal .sheet-foot .btn.ghost, .modal .sheet-foot .btn.danger { flex: 0 0 auto; }

.pick-list { margin: 0 -4px 4px; }
.pick {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  min-height: 48px; padding: 8px 4px;
  border-top: 1px solid var(--border);
  font-size: 14.5px;
  cursor: pointer;
}
.pick:first-child { border-top: 0; }

@media (min-width: 560px) {
  .modal-back { align-items: center; padding: 20px; }
  .modal { border-radius: 20px; max-height: calc(84dvh / var(--zoom)); }
  .modal .grab { display: none; }
  .modal .sheet-body { padding-top: 18px; }
  .modal .sheet-foot { padding-bottom: 14px; }
}

/* ============================================================
   Toast
   ============================================================ */

/* Above everything, focus mode and its sheet included, so a message is never
   hidden behind the thing that caused it. */
.toast {
  position: fixed; left: 50%; z-index: 100;
  bottom: calc(var(--nav-h) + env(safe-area-inset-bottom) + 16px);
  transform: translateX(-50%);
  /* Sized to its text: centred from left: 50%, it would otherwise only get half
     the screen and break "10 min logged to Mathematics" over two lines. */
  width: max-content;
  max-width: calc(100vw / var(--zoom) - 32px);
  padding: 11px 16px;
  border-radius: 999px;
  background: var(--text); color: var(--bg);
  font-size: 13.5px; font-weight: 550;
  box-shadow: var(--shadow-lift);
  animation: toast 0.2s ease;
}
.toast[hidden] { display: none; }
/* With a sheet open the bottom of the screen is its form and Save button, and in
   focus mode it is the timer's buttons, so the message goes to the top instead. */
body.sheet-open .toast,
body.focus-on .toast { top: calc(10px + env(safe-area-inset-top)); bottom: auto; }
@keyframes toast { from { opacity: 0; transform: translate(-50%, 8px); } to { opacity: 1; transform: translate(-50%, 0); } }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}