/*
  styles.css — how everything looks.

  COLORS: every color is a "variable" defined once in :root below
  (like --accent). Change it here and it changes everywhere.
  The @media (prefers-color-scheme: dark) block swaps in dark-mode
  colors automatically when your phone is in dark mode.

  Stanford colors used: Cardinal red (#8c1515), Palo Alto green (#175e54).
*/

:root {
  --bg: #f4f5f9;          /* page background */
  --surface: #ffffff;     /* cards and lists */
  --surface2: #eef0f6;    /* tracks, inputs, subtle fills */
  --text: #111827;        /* main text */
  --muted: #6b7280;       /* secondary text */
  --line: #e5e7eb;        /* thin dividers */
  --accent: #8c1515;      /* Stanford cardinal: buttons, active tab */
  --accent2: #b1040e;     /* brighter cardinal: end of gradients */
  --accent-soft: #f9eded; /* pale cardinal background (insight box) */
  --on-accent: #ffffff;   /* text on top of accent-colored buttons */
  --ok: #175e54;          /* "done" — Palo Alto green */
  --ok-soft: #e1efe9;
  --prog: #a8730a;        /* "in progress" — gold */
  --prog-soft: #fbf1d9;
  --plan: #8c1515;        /* "planned" */
  --radius: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0c10;
    --surface: #16181d;
    --surface2: #1f2229;
    --text: #f3f4f6;
    --muted: #9ca3af;
    --line: #2a2d35;
    --accent: #e5605f;
    --accent2: #f08a7e;
    --accent-soft: #3a1414;
    --on-accent: #1a0505;
    --ok: #5cc1a6;
    --ok-soft: #0f2c27;
    --prog: #f2c04d;
    --prog-soft: #3a2a05;
    --plan: #e5605f;
  }
}

/* ---------- Page basics ---------- */

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.4;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--accent); }

main {
  max-width: 600px;
  margin: 0 auto;
  /* top: room for the notch; bottom: room for the tab bar */
  padding: calc(env(safe-area-inset-top) + 20px) 16px calc(env(safe-area-inset-bottom) + 100px);
}

/* ---------- Screen headers ---------- */

.header { position: relative; margin-bottom: 16px; }
.eyebrow {
  font-size: 13px; font-weight: 600; color: var(--muted);
  letter-spacing: .02em; text-transform: uppercase;
}
.eyebrow a { color: var(--accent); text-decoration: none; text-transform: none; font-size: 15px; }
h1 { font-size: 30px; margin: 2px 0 0; letter-spacing: -.02em; line-height: 1.15; }
.subtitle { font-size: 17px; margin-top: 4px; }

/* round icon button (the Settings gear) */
.icon-btn {
  position: absolute; right: 0; top: 0;
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--surface); display: grid; place-items: center;
}
.icon-btn svg { width: 19px; height: 19px; fill: none; stroke: var(--muted); stroke-width: 2; stroke-linecap: round; }

/* ---------- Cards, tiles, sections ---------- */

.card { background: var(--surface); border-radius: var(--radius); padding: 16px; margin-bottom: 12px; }
.card p { margin: 0 0 8px; }
.card p:last-child { margin-bottom: 0; }

.section-h { display: flex; justify-content: space-between; align-items: baseline; margin: 20px 4px 8px; }
.section-h h2 { font-size: 17px; margin: 0; }
.section-h a { font-size: 14px; text-decoration: none; }

.muted { color: var(--muted); font-size: 14px; }
.small { font-size: 13px; }

.hero { display: flex; gap: 16px; align-items: center; }
.ring { width: 96px; height: 96px; flex: none; }
.big { font-size: 28px; font-weight: 700; letter-spacing: -.02em; }

.tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 12px; }
.tile { background: var(--surface); border-radius: 14px; padding: 12px; }
.tile b { display: block; font-size: 20px; letter-spacing: -.01em; font-variant-numeric: tabular-nums; }
.tile span { font-size: 12px; color: var(--muted); }

.insight { background: var(--accent-soft); border-radius: 14px; padding: 12px 14px; font-size: 14px; margin-bottom: 12px; }
.insight b { color: var(--accent); }

.bar { height: 8px; border-radius: 99px; background: var(--surface2); overflow: hidden; margin: 6px 0 2px; }
.bar i { display: block; height: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--accent), var(--accent2)); }

/* ---------- Lists (like iPhone Settings) ---------- */

.list { background: var(--surface); border-radius: var(--radius); overflow: hidden; margin-bottom: 12px; }
.row {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; border-bottom: 1px solid var(--line);
  color: inherit; text-decoration: none;
}
.row:last-child { border-bottom: 0; }
.row .main { flex: 1; min-width: 0; }
.row .code { font-weight: 600; font-size: 15px; }
.row .title { font-size: 13px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.row .chev { color: var(--muted); }

/* ---------- Pills and tags ---------- */

.pill { font-size: 12px; font-weight: 600; padding: 3px 8px; border-radius: 99px; white-space: nowrap; }
.pill.completed { background: var(--ok-soft); color: var(--ok); }
.pill.in-progress { background: var(--prog-soft); color: var(--prog); }
.pill.planned, .pill.neutral { background: var(--surface2); color: var(--muted); }

.tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 10px 0 4px; }
.tag { text-decoration: none; font-size: 12px; font-weight: 600; padding: 4px 9px; border-radius: 99px; background: var(--surface); color: var(--muted); }

/* ---------- Plan screen ---------- */

.seg { display: flex; background: var(--surface2); border-radius: 10px; padding: 2px; margin-bottom: 16px; }
.seg a { flex: 1; text-align: center; font-size: 13px; font-weight: 600; padding: 6px 2px; border-radius: 8px; color: var(--muted); text-decoration: none; }
.seg a.on { background: var(--surface); color: var(--text); box-shadow: 0 1px 2px rgba(0,0,0,.1); }

.quarter { margin-bottom: 14px; }
.quarter-h { display: flex; justify-content: space-between; font-size: 13px; font-weight: 600; color: var(--muted); margin: 0 4px 6px; text-transform: uppercase; }
.chips { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.chip {
  background: var(--surface); border-radius: 10px; padding: 8px 10px;
  font-size: 13px; font-weight: 600; color: var(--text); text-decoration: none;
  border-left: 3px solid var(--plan); min-width: 0;
}
.chip small { display: block; font-weight: 500; color: var(--muted); font-size: 11px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chip.completed { border-left-color: var(--ok); }
.chip.in-progress { border-left-color: var(--prog); }
.chip.add { border: 1.5px dashed var(--line); color: var(--accent); background: transparent; display: grid; place-items: center; min-height: 48px; }

/* ---------- Course page ---------- */

.description { font-size: 15px; line-height: 1.55; color: var(--muted); }
/* collapsed long description: 6 lines, then "Show more" */
.description.clamped { display: -webkit-box; -webkit-line-clamp: 6; -webkit-box-orient: vertical; overflow: hidden; cursor: pointer; }
.description.clamped::after { content: ''; }
.description.clamped + p::before { content: 'Tap the description to show more · '; color: var(--muted); font-weight: 400; font-size: 13px; }
.tree { font-size: 14px; line-height: 1.9; }
.tree .lbl { font-weight: 600; }
.tree .node { padding-left: 14px; border-left: 2px solid var(--line); margin-left: 6px; }

/* ---------- Forms and buttons ---------- */

.field { display: block; margin-bottom: 14px; }
.field > span { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin-bottom: 6px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

input, select {
  width: 100%; padding: 11px 12px;
  border: 1px solid var(--line); border-radius: 12px;
  background: var(--surface2); color: var(--text);
  font-size: 16px; /* 16px+ stops iPhone from zooming in */
  font-family: inherit; appearance: none; -webkit-appearance: none;
}
/* dropdowns get a small arrow on the right */
select {
  padding-right: 32px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%236b7280' stroke-width='2'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 12px center; background-size: 12px 8px;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.search { position: sticky; top: 0; z-index: 5; padding: 8px 0; background: var(--bg); }
.search input { background: var(--surface); }

.btn {
  display: block; width: 100%; text-align: center; border: 0; cursor: pointer;
  background: var(--accent); color: var(--on-accent);
  font-family: inherit; font-size: 16px; font-weight: 600; line-height: 1;
  border-radius: 14px; padding: 15px; margin-top: 12px; text-decoration: none;
}
.btn.secondary { background: var(--surface); color: var(--accent); }
.btn.danger { background: transparent; color: var(--accent); }

.empty { text-align: center; padding: 28px 16px; }

/* ---------- Bottom tab bar ---------- */

.tab-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 10;
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: var(--surface); border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom);
}
.tab-bar a {
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  padding: 8px 0 6px; color: var(--muted); text-decoration: none; font-size: 11px;
  -webkit-tap-highlight-color: transparent;
}
.tab-bar svg { width: 25px; height: 25px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.tab-bar a.active { color: var(--accent); }

/* ---------- Plan overview (all four years) ---------- */

.overview { display: grid; gap: 4px; }
/* On a wide screen (iPad, laptop), put "at a glance" beside the grid */
@media (min-width: 900px) {
  main:has(.overview) { max-width: 1100px; }
  .overview { grid-template-columns: 1fr 340px; gap: 20px; align-items: start; }
  .overview aside { position: sticky; top: 16px; margin-top: 20px; }
}

.mini-grid { display: grid; gap: 6px; }
.mini {
  background: var(--surface); border-radius: 12px; padding: 8px;
  display: flex; flex-direction: column; gap: 4px; min-width: 0; min-height: 84px;
}
.mini.now { outline: 2px solid var(--prog); outline-offset: -2px; }
.mini-h { display: flex; justify-content: space-between; font-size: 11px; font-weight: 700; color: var(--muted); text-transform: uppercase; margin-bottom: 2px; }
.mini-c {
  font-size: 12px; font-weight: 600; color: var(--text); text-decoration: none;
  background: var(--surface2); border-left: 3px solid var(--plan); border-radius: 6px;
  padding: 3px 6px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.mini-c.completed { border-left-color: var(--ok); }
.mini-c.in-progress { border-left-color: var(--prog); }
.mini-add { font-size: 13px; color: var(--accent); text-decoration: none; text-align: center; border: 1.5px dashed var(--line); border-radius: 6px; padding: 1px; margin-top: auto; }

.glance { padding: 14px; }
.glance-title { display: block; font-weight: 700; font-size: 15px; color: var(--text); text-decoration: none; }
.glance-block { border-top: 1px solid var(--line); margin-top: 12px; padding-top: 12px; }
.glance-row { padding: 5px 0; }
.glance-top { display: flex; justify-content: space-between; gap: 8px; font-size: 13px; }
.glance-top .ok { color: var(--ok); font-weight: 600; }
.glance-chips { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 3px; }
.glance-chips:empty { display: none; }
.glance-chips .mini-c { font-size: 11px; padding: 2px 6px; }

/* secondary buttons inside a card need a fill to look like buttons */
.card .btn.secondary { background: var(--surface2); }