/* ============================================================
   İngilizce Defterim — "Çalışma Defteri" editoryal tema
   ============================================================ */

:root {
  --paper: #f2ead9;
  --paper-raised: #fbf6ea;
  --paper-line: #d8c9a8;
  --ink: #2b231a;
  --ink-soft: #5c4f3f;
  --ink-faint: #8a7c67;
  --rust: #b8502c;
  --rust-dark: #8f3c20;
  --mustard: #c98a28;
  --green: #3f6b4c;
  --green-bg: #e3ecdf;
  --red: #a23b2e;
  --red-bg: #f3e1dc;
  --shadow: 0 1px 0 rgba(43,35,26,0.06), 0 6px 18px rgba(43,35,26,0.08);
  --shadow-lift: 0 2px 0 rgba(43,35,26,0.08), 0 14px 30px rgba(43,35,26,0.14);
  --radius: 14px;
  --font-display: "Fraunces", "Georgia", serif;
  --font-body: "Libre Franklin", "Segoe UI", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #221c15;
    --paper-raised: #2b241b;
    --paper-line: #4a3f2e;
    --ink: #f1e6d2;
    --ink-soft: #cdbda0;
    --ink-faint: #8f8168;
    --rust: #e08a5c;
    --rust-dark: #f0a67a;
    --mustard: #e0ab53;
    --green: #8fbf9e;
    --green-bg: #263226;
    --red: #e08478;
    --red-bg: #3a2420;
    --shadow: 0 1px 0 rgba(0,0,0,0.3), 0 6px 18px rgba(0,0,0,0.35);
    --shadow-lift: 0 2px 0 rgba(0,0,0,0.3), 0 14px 30px rgba(0,0,0,0.45);
  }
}

:root[data-theme="dark"] {
  --paper: #221c15;
  --paper-raised: #2b241b;
  --paper-line: #4a3f2e;
  --ink: #f1e6d2;
  --ink-soft: #cdbda0;
  --ink-faint: #8f8168;
  --rust: #e08a5c;
  --rust-dark: #f0a67a;
  --mustard: #e0ab53;
  --green: #8fbf9e;
  --green-bg: #263226;
  --red: #e08478;
  --red-bg: #3a2420;
  --shadow: 0 1px 0 rgba(0,0,0,0.3), 0 6px 18px rgba(0,0,0,0.35);
  --shadow-lift: 0 2px 0 rgba(0,0,0,0.3), 0 14px 30px rgba(0,0,0,0.45);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.55;
  min-height: 100vh;
  position: relative;
}

/* subtle paper grain */
.paper-grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
  background-image:
    radial-gradient(rgba(43,35,26,0.05) 1px, transparent 1px),
    radial-gradient(rgba(43,35,26,0.035) 1px, transparent 1px);
  background-size: 3px 3px, 7px 7px;
  background-position: 0 0, 1.5px 1.5px;
  mix-blend-mode: multiply;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .paper-grain { mix-blend-mode: screen; opacity: 0.15; }
}
:root[data-theme="dark"] .paper-grain { mix-blend-mode: screen; opacity: 0.15; }

a { color: inherit; }

/* ---------- Header ---------- */

.site-header {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 32px;
  border-bottom: 2px solid var(--ink);
  background: var(--paper-raised);
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 14px; }

.brand-mark {
  font-size: 34px;
  color: var(--rust);
  transform: rotate(-8deg);
  display: inline-block;
}

.brand-text h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 26px;
  margin: 0;
  letter-spacing: -0.01em;
}

.brand-text p {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
  font-style: italic;
  font-family: var(--font-display);
}

.top-nav { display: flex; gap: 8px; }

.nav-btn {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  color: var(--ink-soft);
  background: transparent;
  border: 2px solid transparent;
  border-radius: 999px;
  padding: 8px 18px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.nav-btn:hover { color: var(--ink); border-color: var(--paper-line); }

.nav-btn.active {
  color: var(--paper-raised);
  background: var(--ink);
  border-color: var(--ink);
}

/* ---------- Layout ---------- */

.layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
  max-width: 1180px;
  margin: 0 auto;
  min-height: 70vh;
}

.sidebar {
  padding: 28px 20px;
  border-right: 2px dashed var(--paper-line);
}

.sidebar-title {
  font-family: var(--font-display);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  margin: 0 0 14px 6px;
}

.sidebar-category {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 15px;
  color: var(--mustard);
  margin: 22px 0 8px 6px;
}
.sidebar-category:first-of-type { margin-top: 0; }

.unit-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  border-radius: 10px;
  padding: 9px 10px;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 14.5px;
  color: var(--ink);
}

.unit-link:hover { background: var(--paper-line); }

.unit-link.active {
  background: var(--ink);
  color: var(--paper-raised);
}

.unit-link .num {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--rust);
  min-width: 18px;
}
.unit-link.active .num { color: var(--mustard); }

.unit-link .check {
  margin-left: auto;
  color: var(--green);
  font-size: 13px;
}
.unit-link.active .check { color: #bfe3cc; }

/* ---------- Content ---------- */

.content {
  padding: 36px 40px 70px;
  min-width: 0;
}

.hero {
  background: var(--paper-raised);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  padding: 34px;
  box-shadow: var(--shadow-lift);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  top: -40px; right: -40px;
  width: 160px; height: 160px;
  border-radius: 50%;
  background: var(--mustard);
  opacity: 0.18;
}

.hero h2 {
  font-family: var(--font-display);
  font-size: 32px;
  margin: 0 0 10px;
}

.hero p { color: var(--ink-soft); max-width: 60ch; font-size: 15.5px; }

.stat-row { display: flex; gap: 16px; margin-top: 24px; flex-wrap: wrap; }

.stat-card {
  background: var(--paper);
  border: 1.5px solid var(--paper-line);
  border-radius: 12px;
  padding: 14px 18px;
  min-width: 140px;
}
.stat-card .big {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--rust);
}
.stat-card .label {
  font-size: 12.5px;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.home-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 26px;
}

.pick-card {
  background: var(--paper-raised);
  border: 1.5px solid var(--paper-line);
  border-radius: var(--radius);
  padding: 20px 22px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  text-align: left;
}
.pick-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.pick-card .tag {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--mustard);
  font-size: 13px;
}
.pick-card h3 {
  font-family: var(--font-display);
  font-size: 19px;
  margin: 4px 0 6px;
}
.pick-card p { margin: 0; color: var(--ink-soft); font-size: 14px; }

/* ---------- Unit page ---------- */

.unit-page .kicker {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--mustard);
  font-size: 14px;
  margin-bottom: 6px;
}

.unit-page h2 {
  font-family: var(--font-display);
  font-size: 30px;
  margin: 0 0 4px;
}

.unit-sub { color: var(--ink-soft); margin: 0 0 26px; font-size: 15px; }

.card {
  background: var(--paper-raised);
  border: 1.5px solid var(--paper-line);
  border-radius: var(--radius);
  padding: 24px 26px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.card h3 {
  font-family: var(--font-display);
  font-size: 19px;
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card h3::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--rust);
  display: inline-block;
}

.card p { margin: 0 0 8px; }

.example-list { list-style: none; margin: 14px 0 0; padding: 0; }

.example-list li {
  padding: 10px 0 10px 18px;
  border-left: 3px solid var(--paper-line);
  margin-bottom: 8px;
}

.example-list .en {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 16px;
}

.example-list .tr { color: var(--ink-soft); font-size: 13.5px; margin-top: 2px; }

.mini-table { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 14px; }
.mini-table td { padding: 8px 10px; border-bottom: 1px dashed var(--paper-line); }
.mini-table tr:first-child td { padding-top: 0; }
.mini-table td:first-child { color: var(--ink-soft); }
.mini-table td:nth-child(2) { font-family: var(--font-display); font-weight: 600; color: var(--rust); }

.warning-card {
  background: var(--red-bg);
  border: 1.5px solid var(--red);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 20px;
}
.warning-card .label {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--red);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
  display: block;
}

/* exercise */

.exercise-list { list-style: none; margin: 16px 0 0; padding: 0; display: grid; gap: 10px; }

.exercise-item {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 15.5px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--paper);
}

.exercise-item input {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  border: none;
  border-bottom: 2px solid var(--ink-faint);
  background: transparent;
  color: var(--ink);
  padding: 2px 4px;
  width: 140px;
  outline: none;
}
.exercise-item input:focus { border-color: var(--rust); }
.exercise-item input.correct { border-color: var(--green); color: var(--green); }
.exercise-item input.wrong { border-color: var(--red); color: var(--red); }

.exercise-item .fb { font-size: 16px; min-width: 18px; }

.exercise-actions { display: flex; align-items: center; gap: 14px; margin-top: 18px; }

.btn {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14px;
  padding: 11px 22px;
  border-radius: 999px;
  border: 2px solid var(--ink);
  background: var(--ink);
  color: var(--paper-raised);
  cursor: pointer;
  transition: transform 0.12s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn.secondary { background: transparent; color: var(--ink); }
.btn.ghost { background: transparent; color: var(--ink-soft); border-color: var(--paper-line); }

.score-note { font-size: 14px; color: var(--ink-soft); }
.score-note strong { color: var(--rust); font-family: var(--font-display); }

.complete-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 2px dashed var(--paper-line);
}

.stamp {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--green);
  border: 3px solid var(--green);
  border-radius: 10px;
  padding: 6px 14px;
  transform: rotate(-6deg);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  letter-spacing: 0.03em;
}

/* ---------- Vocabulary / Flashcards ---------- */

.vocab-page h2 {
  font-family: var(--font-display);
  font-size: 30px;
  margin: 0 0 6px;
}

.vocab-page > p.lead { color: var(--ink-soft); margin: 0 0 24px; max-width: 60ch; }

.srs-summary { display: flex; gap: 14px; margin-bottom: 26px; flex-wrap: wrap; }

.box-pill {
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 13px;
  font-weight: 600;
  background: var(--paper-raised);
  border: 1.5px solid var(--paper-line);
}
.box-pill .n { font-family: var(--font-display); color: var(--rust); margin-right: 5px; }

.flash-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
  padding: 10px 0 30px;
}

.flashcard {
  width: 100%;
  max-width: 420px;
  height: 260px;
  perspective: 1400px;
  cursor: pointer;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.5s cubic-bezier(.2,.9,.3,1.1);
  transform-style: preserve-3d;
}

.flashcard.flipped .flashcard-inner { transform: rotateY(180deg); }

.flash-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: 18px;
  border: 2px solid var(--ink);
  background: var(--paper-raised);
  box-shadow: var(--shadow-lift);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
}

.flash-face.back { transform: rotateY(180deg); background: #f4e6c9; }

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .flash-face.back { background: #3a3222; }
}
:root[data-theme="dark"] .flash-face.back { background: #3a3222; }

.flash-face .eyebrow {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  margin-bottom: 14px;
}

.flash-face .word {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 600;
}

.flash-face .tr-word {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 600;
  color: var(--rust);
  margin-bottom: 10px;
}

.flash-face .example {
  font-size: 14px;
  color: var(--ink-soft);
  font-style: italic;
  margin-top: 10px;
  max-width: 32ch;
}

.flash-face .hint { font-size: 12.5px; color: var(--ink-faint); margin-top: 16px; }

.flash-actions { display: flex; gap: 14px; }

.flash-actions .btn.know { background: var(--green); border-color: var(--green); }
.flash-actions .btn.again { background: var(--red); border-color: var(--red); }

.flash-empty {
  text-align: center;
  padding: 50px 20px;
  color: var(--ink-soft);
}
.flash-empty .big-check { font-size: 46px; color: var(--green); display: block; margin-bottom: 10px; }

.deck-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
  margin-top: 10px;
}
.deck-word {
  background: var(--paper-raised);
  border: 1.5px solid var(--paper-line);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 13px;
}
.deck-word .en { font-weight: 700; display: block; }
.deck-word .tr { color: var(--ink-soft); }
.deck-word .box { float: right; font-size: 11px; color: var(--mustard); font-weight: 700; }

/* ---------- Footer ---------- */

.site-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 26px;
  font-size: 12.5px;
  color: var(--ink-faint);
  border-top: 2px dashed var(--paper-line);
}

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { border-right: none; border-bottom: 2px dashed var(--paper-line); }
  .home-grid { grid-template-columns: 1fr; }
  .content { padding: 26px 18px 60px; }
  .site-header { padding: 18px 18px; }
}