/* ---------- BASE ---------- */
* { box-sizing: border-box; margin: 0; }

:root {
  --ink: #1e2430;
  --muted: #667085;
  --line: #e4e7ec;
  --accent: #4f46e5;
  --new: #067647;
  --new-bg: #dcfae6;
  --mod: #92400e;
  --mod-bg: #fef3c7;
  --bad: #b42318;
  --bad-bg: #fee4e2;
  --mono: ui-monospace, "SF Mono", Consolas, monospace;
}

body {
  min-height: 100vh;
  background: #f6f7fb;
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.top { max-width: 1120px; margin: 0 auto; padding: 28px 16px 8px; }
.top h1 { font-size: clamp(24px, 4vw, 34px); letter-spacing: -.5px; }
.top p { color: var(--muted); margin-top: 6px; }

.page {
  max-width: 1120px;
  margin: 0 auto;
  padding: 16px 16px 32px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  gap: 16px;
  align-items: start;
}
.lessons, .zones { grid-column: 1 / -1; }
.panel { min-width: 0; background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 18px; }
/* ---------- END BASE ---------- */

/* ---------- LESSONS ---------- */
.lesson-list { display: flex; flex-wrap: wrap; gap: 6px; }
.chip-btn {
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: inherit;
  font: 600 13px system-ui, sans-serif;
  cursor: pointer;
}
.chip-btn:hover { border-color: #a5b4fc; }
.chip-btn[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }

.note { min-height: 64px; margin-top: 12px; padding: 12px 14px; border-radius: 10px; background: #eef2ff; color: #3730a3; font-size: 14.5px; line-height: 1.5; }
.buttons { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 12px; }
.btn {
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: inherit;
  font: 700 14px system-ui, sans-serif;
  cursor: pointer;
}
.btn.primary { border-color: var(--accent); background: var(--accent); color: #fff; }
.btn:disabled { opacity: .45; cursor: default; }
.upcoming { min-width: 0; color: var(--accent); font: 600 13px var(--mono); overflow-wrap: anywhere; }
.counter { margin-left: auto; color: var(--muted); font-size: 13px; }
.chip-btn:focus-visible, .btn:focus-visible, .term-out:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
/* ---------- END LESSONS ---------- */

/* ---------- FOUR AREAS ---------- */
.zones { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.zone { min-width: 0; min-height: 166px; padding: 12px; border: 1px solid var(--line); border-radius: 12px; background: #fcfcfd; }
.zone h2 { margin-bottom: 10px; font-size: 14px; }
.zone h2 small { display: block; color: var(--muted); font-size: 12px; font-weight: 400; }

.files { display: flex; flex-direction: column; gap: 5px; padding: 0; list-style: none; }
.files li {
  display: flex;
  flex-wrap: wrap;   /* on a narrow screen the tag drops below the file name */
  justify-content: space-between;
  gap: 2px 8px;
  padding: 5px 8px;
  border-radius: 6px;
  background: #f2f4f7;
  color: #475467;
  font: 12.5px var(--mono);
  overflow-wrap: break-word;
  animation: pop .2s ease both;
}
.files li b { flex: none; font-weight: 700; }
.files li.modified { background: var(--mod-bg); color: var(--mod); }
.files li.untracked, .files li.added { background: var(--new-bg); color: var(--new); }
.files li.conflict { background: var(--bad-bg); color: var(--bad); }
.files li.deleted { background: var(--bad-bg); color: var(--bad); text-decoration: line-through; }
.files .none { background: none; padding: 5px 0; color: var(--muted); font: 13px system-ui, sans-serif; }

.repo-box { font-size: 13px; line-height: 1.5; }
.repo-box strong { display: block; font: 700 13px var(--mono); overflow-wrap: anywhere; }
.repo-box code { font: 12.5px var(--mono); color: var(--accent); }
.repo-box p { margin-top: 6px; color: var(--muted); }
.badge { display: inline-block; margin-top: 8px; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.ok { background: var(--new-bg); color: var(--new); }
.badge.warn { background: var(--mod-bg); color: var(--mod); }
.badge.bad { background: var(--bad-bg); color: var(--bad); }
/* ---------- END FOUR AREAS ---------- */

/* ---------- TERMINAL ---------- */
.terminal { background: #111827; border-color: #111827; color: #e5e7eb; }
.term-out { height: 284px; overflow-y: auto; font: 13px/1.55 var(--mono); }
.term-out div { white-space: pre-wrap; overflow-wrap: anywhere; }
.term-out .cmd { margin-top: 8px; color: #93c5fd; font-weight: 700; }
.term-out .cmd:first-child { margin-top: 0; }
.term-out .err { color: #fca5a5; }
.term-out .ok { color: #d1d5db; }

.term-in { display: flex; align-items: center; gap: 8px; margin-top: 10px; padding-top: 10px; border-top: 1px solid #374151; }
.term-in label { color: #6ee7b7; font: 700 14px var(--mono); }
.term-in input { flex: 1; min-width: 0; padding: 6px 0; border: 0; outline: 0; background: none; color: #fff; font: 14px var(--mono); }
.term-in input::placeholder { color: #6b7280; }

.help { margin-top: 8px; color: #9ca3af; font-size: 12.5px; line-height: 1.6; }
.help summary { cursor: pointer; }
.help p { margin-top: 6px; }
.help code { color: #d1d5db; font: 12px var(--mono); }
/* ---------- END TERMINAL ---------- */

/* ---------- HISTORY ---------- */
.graph-panel h2 { margin-bottom: 10px; font-size: 16px; }
.graph-scroll { overflow-x: auto; }
.graph { display: block; }
.graph .link { fill: none; stroke: #98a2b3; stroke-width: 2; }
.graph .dot { fill: var(--accent); stroke: #fff; stroke-width: 2; }
.graph .dot.merge { fill: #7c3aed; }
.graph .dot.current { stroke: var(--ink); stroke-width: 3; }
.graph .dot.teammate { fill: #0ea5e9; }
/* The white outline keeps a label readable when a branch line passes behind it. */
.graph .msg { fill: var(--muted); font: 11px system-ui, sans-serif; text-anchor: middle; paint-order: stroke; stroke: #fff; stroke-width: 4px; stroke-linejoin: round; }
.graph .tag rect { rx: 4; }
.graph .tag text { font: 700 11px var(--mono); text-anchor: middle; }
.graph .tag.branch rect { fill: #eef2ff; }
.graph .tag.branch text { fill: #3730a3; }
.graph .tag.head rect { fill: var(--ink); }
.graph .tag.head text { fill: #fff; }
.graph .tag.origin rect { fill: #e0f2fe; }
.graph .tag.origin text { fill: #075985; }
/* ---------- END HISTORY ---------- */

/* ---------- KEYFRAMES ---------- */
@keyframes pop { from { opacity: 0; transform: translateY(4px); } }
@media (prefers-reduced-motion: reduce) {
  .files li { animation: none; }
}
/* ---------- END KEYFRAMES ---------- */

/* ---------- SMALL SCREENS ---------- */
@media (max-width: 900px) {
  .page { grid-template-columns: minmax(0, 1fr); }
  .zones { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .note { min-height: 96px; }
}
@media (max-width: 420px) {
  .zone { padding: 10px; }
  .zone h2 { font-size: 13px; }
}
/* ---------- END SMALL SCREENS ---------- */