/* ===== FVV Yordamchi — dizayn tokenlari =====
   Palette:
   --ink:      #1B2430  (chuqur ko'k-kulrang - rasmiylik, hujjat matni)
   --paper:    #F7F5EF  (issiq oq - qog'oz hujjat foni)
   --paper-2:  #EFEBE0  (biroz to'qroq qog'ozsimon panel)
   --alert:    #C1440E  (kuygan to'q sariq-qizil - xavf, qizil tugma)
   --safe:     #2F6F4E  (xavfsizlik yashili - to'g'ri javob, muvaffaqiyat)
   --line:     #D8D2C4  (chegara, ajratuvchi chiziq)
   Typography: display — 'PT Serif' (rasmiy hujjat ohangi, kirill/lotin qo'llab-quvvatlaydi)
               body    — system-ui / 'Segoe UI' (aniq o'qilishi uchun)
*/

:root {
  --ink: #1B2430;
  --ink-soft: #4A5568;
  --paper: #F7F5EF;
  --paper-2: #EFEBE0;
  --alert: #1E3A8A;
  --alert-dark: #16296B;
  --safe: #2F6F4E;
  --incorrect: #5C6470;
  --incorrect-bg: #E9EBEF;
  --line: #D8D2C4;
  --radius: 6px;
  --shadow: 0 1px 3px rgba(27, 36, 48, 0.08), 0 1px 2px rgba(27, 36, 48, 0.06);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--paper);
  color: var(--ink);
  min-height: 100vh;
}

h1, h2, h3, .display {
  font-family: "PT Serif", Georgia, serif;
  font-weight: 700;
  letter-spacing: -0.01em;
}

a { color: inherit; }

button {
  font-family: inherit;
  cursor: pointer;
}

/* ===== Header — davlat idorasi hujjatiga o'xshash yuqori chiziq bilan ===== */
.app-header {
  background: var(--ink);
  color: var(--paper);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 3px solid var(--alert);
}

.app-header .brand {
  font-family: "PT Serif", Georgia, serif;
  font-size: 1.1rem;
  font-weight: 700;
}

.app-header .brand small {
  display: block;
  font-family: -apple-system, sans-serif;
  font-weight: 400;
  font-size: 0.7rem;
  opacity: 0.7;
  letter-spacing: 0.03em;
}

.logout-btn {
  background: none;
  border: 1px solid rgba(247,245,239,0.3);
  color: var(--paper);
  padding: 6px 12px;
  border-radius: var(--radius);
  font-size: 0.85rem;
}

/* ===== Papka-varaqli navigatsiya (signature element) =====
   Hujjat asosidagi tizim bo'lgani uchun, bo'limlar orasidagi
   almashish "papka varaqlari" ko'rinishida ishlab chiqilgan. */
.tab-nav {
  display: flex;
  background: var(--paper-2);
  border-bottom: 1px solid var(--line);
  padding: 0 12px;
  overflow-x: auto;
}

.tab-btn {
  background: none;
  border: none;
  padding: 14px 16px;
  font-size: 0.9rem;
  color: var(--ink-soft);
  border-bottom: 3px solid transparent;
  white-space: nowrap;
}

.tab-btn.active {
  color: var(--ink);
  border-bottom-color: var(--alert);
  font-weight: 600;
}

/* ===== Ichki kichik tablar (masalan, yangiliklar toifasi) ===== */
.sub-tab-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 14px;
}

.sub-tab-btn {
  flex: 1;
  background: #fff;
  border: 1px solid var(--line);
  padding: 10px 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  color: var(--ink-soft);
}

.sub-tab-btn.active {
  background: var(--alert);
  border-color: var(--alert);
  color: #fff;
  font-weight: 600;
}

.news-image, .material-media {
  width: 100%;
  border-radius: var(--radius);
  margin-bottom: 10px;
  display: block;
  background: var(--paper-2);
}

.news-image { max-height: 220px; object-fit: cover; }
.material-media video, .material-media img { width: 100%; border-radius: var(--radius); display: block; }

/* ===== Umumiy konteyner ===== */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px 80px;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 14px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.card .meta {
  font-size: 0.78rem;
  color: var(--ink-soft);
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

/* Manba ko'rsatkichi - qavs ichidagi qonun bandi */
.source-tag {
  display: inline-block;
  background: var(--paper-2);
  color: var(--ink-soft);
  font-size: 0.78rem;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid var(--line);
}

/* ===== Formalar ===== */
input, textarea, select {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 0.95rem;
  background: #fff;
  color: var(--ink);
  margin-bottom: 10px;
  font-family: inherit;
}

input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--alert);
  outline-offset: 1px;
}

label {
  display: block;
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin-bottom: 4px;
  font-weight: 600;
}

.btn {
  display: inline-block;
  background: var(--alert);
  color: #fff;
  border: none;
  padding: 12px 20px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  width: 100%;
}

.btn:active { background: var(--alert-dark); }

.btn-secondary {
  background: none;
  border: 1px solid var(--line);
  color: var(--ink);
}

.btn-safe { background: var(--safe); }

.error-box {
  background: #E8EEFC;
  border: 1px solid var(--alert);
  color: var(--alert-dark);
  padding: 10px 12px;
  border-radius: var(--radius);
  font-size: 0.88rem;
  margin-bottom: 12px;
  display: none;
}

.error-box.show { display: block; }

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--ink-soft);
}

.empty-state .icon { font-size: 2rem; margin-bottom: 8px; }

/* ===== Test variantlari ===== */
.quiz-option {
  display: block;
  width: 100%;
  text-align: left;
  background: #fff;
  border: 1px solid var(--line);
  padding: 12px 14px;
  border-radius: var(--radius);
  margin-bottom: 8px;
  font-size: 0.92rem;
}

.quiz-option.selected {
  border-color: var(--ink);
  background: var(--paper-2);
}

.quiz-option.correct {
  border-color: var(--safe);
  background: #EAF4EE;
}

.quiz-option.incorrect {
  border-color: var(--incorrect);
  background: var(--incorrect-bg);
}

.quiz-progress {
  font-size: 0.82rem;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.score-display {
  text-align: center;
  padding: 30px 20px;
}

.score-display .big-number {
  font-family: "PT Serif", serif;
  font-size: 3rem;
  font-weight: 700;
  color: var(--alert);
}

@media (prefers-reduced-motion: no-preference) {
  .card, .tab-btn { transition: all 0.15s ease; }
}