:root {
  --bg: #f7f4ee;
  --panel: #fffdf9;
  --side: #efeae1;
  --ink: #1e1b16;
  --ink-2: #57514a;
  --ink-3: #8a8279;
  --line: #e2dbcf;
  --accent: #b4441e;
  --accent-soft: #f6e3d9;
  --gold: #c9971a;
  --ok: #1f7a43;
  --ok-soft: #e1f2e7;
  --bad: #b3261e;
  --bad-soft: #f9e2df;
  --warn: #9a6a00;
  --warn-soft: #fbf0d3;
  --tip-bg: #1e1b16;
  --tip-ink: #fffdf9;
  --radius: 10px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Inter, Roboto, sans-serif;
  /* Hep açık tema: sistem koyu modda olsa da uygulama açık kalır. */
  color-scheme: light;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 var(--font);
  -webkit-font-smoothing: antialiased;
}
button, input { font: inherit; color: inherit; }
a { color: var(--accent); }

.app { display: grid; grid-template-columns: 290px 1fr; min-height: 100vh; }

/* ---------- Kenar çubuğu ---------- */
.side {
  background: var(--side);
  border-right: 1px solid var(--line);
  position: sticky; top: 0; height: 100vh;
  display: flex; flex-direction: column;
}
.brand { display: flex; gap: 12px; align-items: center; padding: 20px 18px 14px; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 10px;
  display: grid; place-items: center;
  background: var(--accent); color: #fff; font-weight: 700; font-size: 22px;
}
.brand-title { font-weight: 650; letter-spacing: -0.01em; }
.brand-sub { font-size: 13px; color: var(--ink-3); }
.lesson-list { overflow-y: auto; flex: 1; padding: 4px 10px 12px; }
.lesson-item {
  width: 100%; display: grid; grid-template-columns: 34px 1fr auto; gap: 8px; align-items: center;
  text-align: left; border: 0; background: none; cursor: pointer;
  padding: 7px 8px; border-radius: 8px; font-size: 14px; line-height: 1.3;
}
.lesson-item:hover { background: color-mix(in srgb, var(--ink) 6%, transparent); }
.lesson-item.active { background: var(--panel); box-shadow: 0 0 0 1px var(--line); }
.lesson-item .num { font-variant-numeric: tabular-nums; color: var(--ink-3); font-size: 13px; }
.lesson-item .name { overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.lesson-item.locked { color: var(--ink-3); }
.badge { font-size: 11px; padding: 2px 7px; border-radius: 99px; white-space: nowrap; }
.badge.done { background: var(--ok-soft); color: var(--ok); }
.badge.now { background: var(--accent-soft); color: var(--accent); }
.badge.soon { background: color-mix(in srgb, var(--ink) 7%, transparent); color: var(--ink-3); }
.badge.lock { color: var(--ink-3); }
.side-foot { display: flex; gap: 14px; padding: 12px 18px 16px; border-top: 1px solid var(--line); font-size: 13px; }
.link-btn { background: none; border: 0; padding: 0; color: var(--ink-2); cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }

/* ---------- Ana alan ---------- */
.main { padding: 36px 48px 80px; max-width: 900px; width: 100%; }
.eyebrow { font-size: 13px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); }
h1 { font-size: 30px; line-height: 1.2; letter-spacing: -0.02em; margin: 6px 0 4px; }
.title-tr { color: var(--ink-2); margin: 0; }
.head-actions { display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center; margin: 16px 0 0; font-size: 14px; }
.head-actions a { font-weight: 550; }
.watch { display: inline-flex; gap: 8px; align-items: center; cursor: pointer; }
.watch input { width: 17px; height: 17px; accent-color: var(--accent); }
.status-line { color: var(--ink-3); }

.tabs { display: flex; gap: 4px; margin: 22px 0 26px; border-bottom: 1px solid var(--line); }
.tab {
  border: 0; background: none; padding: 10px 14px; cursor: pointer; color: var(--ink-2);
  border-bottom: 2px solid transparent; margin-bottom: -1px; font-weight: 550;
}
.tab[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.tab .count { font-size: 12px; color: var(--ink-3); font-weight: 500; margin-left: 4px; }

/* ---------- Konu anlatımı ---------- */
.explain h3 { font-size: 18px; margin: 30px 0 8px; letter-spacing: -0.01em; }
.explain p, .explain li { color: var(--ink); }
.explain .lead { font-size: 17px; color: var(--ink-2); }
.explain ul { padding-left: 22px; }
.muted { color: var(--ink-3); }
.explain .tip, .note {
  background: var(--accent-soft); border-radius: var(--radius); padding: 12px 16px; margin: 16px 0; font-size: 15px;
}
.tbl { border-collapse: collapse; width: 100%; margin: 10px 0 6px; font-size: 15px; background: var(--panel); border-radius: var(--radius); overflow: hidden; box-shadow: 0 0 0 1px var(--line); }
.tbl th, .tbl td { padding: 8px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.tbl tr:last-child td { border-bottom: 0; }
.tbl th { font-size: 13px; color: var(--ink-3); font-weight: 600; background: color-mix(in srgb, var(--ink) 3%, transparent); }
.tbl.conj td:first-child { color: var(--ink-2); white-space: nowrap; }
.tbl.conj b, .tbl.endings b { color: var(--accent); }
.tbl.conj td.irr { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.conj-note { font-size: 13px; color: var(--ink-3); margin: 4px 0 0; }
.words { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 0; }
.word-chip { background: var(--panel); box-shadow: 0 0 0 1px var(--line); border-radius: 8px; padding: 6px 10px; font-size: 14px; }
.word-chip small { color: var(--ink-3); margin-left: 6px; }
.box { margin-top: 34px; }
.box h3 { margin-bottom: 4px; }

/* İspanyolca kelime + anlam */
.w { text-decoration: underline dotted color-mix(in srgb, var(--accent) 70%, transparent); text-underline-offset: 4px; text-decoration-thickness: 1.5px; cursor: help; }
.w:hover { background: var(--accent-soft); border-radius: 3px; }
.es { font-weight: 500; }
.target { font-weight: 600; }
#tip {
  position: fixed; z-index: 50; pointer-events: none;
  background: var(--tip-bg); color: var(--tip-ink);
  font-size: 13.5px; line-height: 1.4; padding: 6px 10px; border-radius: 7px;
  max-width: 320px; box-shadow: 0 6px 20px rgba(0,0,0,.18);
}

/* ---------- Alıştırmalar ---------- */
.sets { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.set-card {
  border: 0; background: var(--panel); box-shadow: 0 0 0 1px var(--line); border-radius: var(--radius);
  padding: 10px 14px; text-align: left; cursor: pointer; min-width: 150px;
}
.set-card.active { box-shadow: 0 0 0 2px var(--accent); }
.set-card .t { font-weight: 600; font-size: 15px; }
.set-card .s { font-size: 13px; color: var(--ink-3); }
.gen-btn {
  border: 1px dashed var(--accent); color: var(--accent); background: none; border-radius: var(--radius);
  padding: 10px 16px; cursor: pointer; font-weight: 600;
}
.gen-btn:hover { background: var(--accent-soft); }

.part-title { display: flex; justify-content: space-between; align-items: baseline; margin: 30px 0 10px; }
.part-title h2 { font-size: 19px; margin: 0; }
.part-title span { color: var(--ink-3); font-size: 14px; }
.items { list-style: none; padding: 0; margin: 0; counter-reset: q; }
.item {
  counter-increment: q; position: relative; padding: 12px 14px 12px 46px; border-radius: var(--radius);
  border: 1px solid transparent;
}
.item + .item { border-top-color: var(--line); border-radius: 0; }
.item::before { content: counter(q); position: absolute; left: 12px; top: 13px; font-size: 13px; color: var(--ink-3); font-variant-numeric: tabular-nums; width: 24px; text-align: right; }
.sentence { font-size: 17px; }
.blank {
  border: 0; border-bottom: 2px solid var(--ink-3); background: transparent; padding: 0 4px; margin: 0 2px;
  font-size: 17px; font-weight: 600; outline: none; min-width: 3.5ch; text-align: center; color: var(--ink);
}
.blank:focus { border-bottom-color: var(--accent); background: var(--accent-soft); }
.hint { color: var(--ink-3); font-size: 14.5px; margin-left: 6px; }
.hint.es-hint { color: var(--ink-2); }
.fb { font-size: 14px; margin-top: 4px; color: var(--ink-2); }
.item.ok { background: var(--ok-soft); }
.item.bad { background: var(--bad-soft); }
.item.warn { background: var(--warn-soft); }
.item.ok .blank { border-bottom-color: var(--ok); color: var(--ok); }
.item.bad .blank { border-bottom-color: var(--bad); color: var(--bad); text-decoration: line-through; }
.item.warn .blank { border-bottom-color: var(--warn); color: var(--warn); }
.fb .right { font-weight: 650; color: var(--ok); }
.fb .accent-note { color: var(--warn); font-weight: 600; }
.from { font-size: 12px; color: var(--ink-3); margin-left: 8px; }

.q { font-size: 16.5px; margin-bottom: 8px; }
.opts { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.opt {
  display: flex; gap: 10px; align-items: flex-start; padding: 8px 12px; border-radius: 8px; cursor: pointer;
  background: var(--panel); box-shadow: 0 0 0 1px var(--line); font-size: 15.5px;
}
.opt input { margin-top: 5px; accent-color: var(--accent); }
.opt.picked { box-shadow: 0 0 0 2px var(--accent); }
.opt.right { box-shadow: 0 0 0 2px var(--ok); background: var(--ok-soft); }
.opt.wrong { box-shadow: 0 0 0 2px var(--bad); background: var(--bad-soft); }
.locked-opts .opt { cursor: default; }

.accent-bar {
  position: sticky; bottom: 14px; z-index: 5; display: flex; flex-wrap: wrap; gap: 6px; align-items: center;
  background: var(--panel); box-shadow: 0 0 0 1px var(--line), 0 8px 24px rgba(0,0,0,.08); border-radius: 12px;
  padding: 8px 10px; margin-top: 28px;
}
.accent-bar .lbl { font-size: 13px; color: var(--ink-3); margin-right: 4px; }
.key { border: 0; background: color-mix(in srgb, var(--ink) 6%, transparent); border-radius: 6px; min-width: 34px; height: 32px; cursor: pointer; font-size: 16px; }
.key:hover { background: var(--accent-soft); }
.spacer { flex: 1; }
.btn { border: 0; border-radius: 8px; padding: 9px 18px; font-weight: 650; cursor: pointer; background: var(--accent); color: #fff; }
.btn.ghost { background: none; color: var(--ink); box-shadow: 0 0 0 1px var(--line); }
.btn:hover { filter: brightness(1.06); }

.score {
  display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; padding: 16px 18px; border-radius: 12px;
  background: var(--panel); box-shadow: 0 0 0 1px var(--line); margin-bottom: 8px;
}
.score .big { font-size: 30px; font-weight: 700; letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.score.pass .big { color: var(--ok); }
.score.fail .big { color: var(--bad); }
.score .msg { flex: 1; min-width: 220px; color: var(--ink-2); font-size: 15px; }

/* ---------- Yapılan alıştırmalar ---------- */
.history { width: 100%; border-collapse: collapse; font-size: 15px; }
.history td, .history th { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; }
.history th { font-size: 13px; color: var(--ink-3); font-weight: 600; }
.history tr.row { cursor: pointer; }
.history tr.row:hover td { background: color-mix(in srgb, var(--ink) 4%, transparent); }
.history tr.sel td { background: var(--accent-soft); }
.pill { font-size: 12px; padding: 2px 8px; border-radius: 99px; font-weight: 600; }
.pill.pass { background: var(--ok-soft); color: var(--ok); }
.pill.fail { background: var(--bad-soft); color: var(--bad); }
.empty { color: var(--ink-3); padding: 30px 0; }

.coming { background: var(--panel); box-shadow: 0 0 0 1px var(--line); border-radius: 12px; padding: 22px 24px; margin-top: 24px; }

.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translateX(-50%) translateY(20px); opacity: 0;
  background: var(--ink); color: var(--bg); padding: 10px 18px; border-radius: 10px; font-size: 15px;
  transition: opacity .2s, transform .2s; pointer-events: none; z-index: 60; max-width: 90vw;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 860px) {
  .app { grid-template-columns: 1fr; }
  .side { position: static; height: auto; max-height: 50vh; }
  .main { padding: 24px 16px 80px; }
  .opts { grid-template-columns: 1fr; }
}