/* ══════════════════════════════════════════════════
   BIJUASKS — STYLESHEET
   Aesthetic: Warm Editorial / Premium Study Card
   Fonts: Playfair Display + DM Sans
══════════════════════════════════════════════════ */

/* ── Variables ────────────────────────────────── */
:root {
  /* Light theme */
  --bg:          #f5f0e8;
  --bg-2:        #ede7d9;
  --surface:     #fffdf8;
  --surface-2:   #faf6ee;
  --border:      rgba(60, 40, 10, 0.10);
  --ink:         #1c1610;
  --ink-2:       #5a4a35;
  --ink-3:       #9a8a75;
  --accent:      #c4601a;
  --accent-2:    #e8843a;
  --accent-soft: rgba(196, 96, 26, 0.10);
  --correct:     #2d7a4f;
  --correct-bg:  #e8f5ee;
  --wrong:       #b83232;
  --wrong-bg:    #fdecea;
  --skip:        #5a6f8a;
  --skip-bg:     #eaf0f7;
  --shadow:      0 8px 40px rgba(60, 40, 10, 0.10);
  --shadow-sm:   0 2px 12px rgba(60, 40, 10, 0.08);
  --radius:      20px;
  --radius-sm:   12px;
  --radius-pill: 100px;
  --transition:  0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg:          #12100d;
  --bg-2:        #1c1912;
  --surface:     #221f18;
  --surface-2:   #2a2620;
  --border:      rgba(255, 220, 160, 0.08);
  --ink:         #f2ead8;
  --ink-2:       #c8b898;
  --ink-3:       #7a6a55;
  --accent:      #e87830;
  --accent-2:    #ffaa60;
  --accent-soft: rgba(232, 120, 48, 0.15);
  --correct:     #4caf76;
  --correct-bg:  #0e2a1a;
  --wrong:       #e05555;
  --wrong-bg:    #2a0e0e;
  --skip:        #7090b0;
  --skip-bg:     #0e1a2a;
  --shadow:      0 8px 40px rgba(0, 0, 0, 0.40);
  --shadow-sm:   0 2px 12px rgba(0, 0, 0, 0.28);
}

/* ── Reset & Base ─────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--ink);
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

/* Subtle grain texture */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.035'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

/* ── Screen System ────────────────────────────── */
.screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  z-index: 10;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.screen.hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
}

.screen.slide-out {
  opacity: 0;
  transform: translateY(-20px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* ── Theme Toggle ─────────────────────────────── */
.theme-toggle {
  position: fixed;
  top: 1.25rem;
  right: 1.25rem;
  z-index: 100;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--surface);
  border: 1.5px solid var(--border);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  transition: background var(--transition), transform 0.2s ease, box-shadow 0.2s ease;
}

.theme-toggle:hover {
  transform: scale(1.1) rotate(20deg);
  box-shadow: var(--shadow);
}

/* ══════════════════════════════════════════════════
   LANDING SCREEN
══════════════════════════════════════════════════ */
.landing-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 3rem 2.5rem 2.5rem;
  width: 100%;
  max-width: 460px;
  text-align: center;
  animation: fadeSlideUp 0.6s ease both;
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.brand-badge {
  display: inline-block;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1rem;
}

.brand-title {
  font-family: 'Playfair Display', serif;
  font-size: clamp(2.8rem, 8vw, 3.8rem);
  font-weight: 900;
  color: var(--ink);
  line-height: 1;
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.brand-title .accent {
  color: var(--accent);
}

.brand-tagline {
  font-size: 0.9rem;
  color: var(--ink-3);
  margin-bottom: 2.2rem;
  font-weight: 300;
  letter-spacing: 0.01em;
}

/* Input */
.input-group {
  text-align: left;
  margin-bottom: 1.5rem;
}

.input-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 0.5rem;
}

.name-input {
  width: 100%;
  padding: 0.85rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  color: var(--ink);
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  font-weight: 400;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.name-input::placeholder { color: var(--ink-3); }

.name-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* Category pills */
.category-group {
  text-align: left;
  margin-bottom: 1.8rem;
}

.category-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.pill {
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  color: var(--ink-2);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.pill:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.pill.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* Last score banner */
.last-score-banner {
  font-size: 0.82rem;
  color: var(--ink-3);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.55rem 1rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.95rem 1.5rem;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--accent);
  color: #fff;
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform 0.15s ease, box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(196, 96, 26, 0.3);
  letter-spacing: 0.01em;
}

.btn-primary:hover {
  background: var(--accent-2);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(196, 96, 26, 0.38);
}

.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.75rem 1.5rem;
  margin-top: 0.75rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--ink-2);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.92rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

/* ══════════════════════════════════════════════════
   LOADING SCREEN
══════════════════════════════════════════════════ */
.loading-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.loader-ring {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-text {
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  color: var(--ink-3);
  font-weight: 400;
  letter-spacing: 0.02em;
  animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50%       { opacity: 1; }
}

/* ══════════════════════════════════════════════════
   QUIZ SCREEN
══════════════════════════════════════════════════ */
.quiz-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem 2rem 1.75rem;
  width: 100%;
  max-width: 540px;
  animation: fadeSlideUp 0.4s ease both;
}

/* Top bar */
.quiz-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.4rem;
}

.user-chip {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-2);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Playfair Display', serif;
}

.score-chip {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.3rem 0.8rem;
  border-radius: var(--radius-pill);
  letter-spacing: 0.02em;
}

/* Progress row */
.progress-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.55rem;
}

.progress-label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.category-tag {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-soft);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-pill);
}

.progress-bar-track {
  height: 5px;
  background: var(--bg-2);
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin-bottom: 1.4rem;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 100%);
  border-radius: var(--radius-pill);
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  width: 0%;
}

/* Timer */
.timer-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.6rem;
}

.timer-arc-wrap {
  position: relative;
  width: 48px;
  height: 48px;
  flex-shrink: 0;
}

.timer-arc {
  width: 48px;
  height: 48px;
  transform: rotate(-90deg);
}

.arc-bg {
  fill: none;
  stroke: var(--bg-2);
  stroke-width: 3.5;
}

.arc-fill {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3.5;
  stroke-linecap: round;
  stroke-dasharray: 125.66;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s linear, stroke 0.3s ease;
}

.arc-fill.warning { stroke: #e8a020; }
.arc-fill.danger  { stroke: var(--wrong); }

.timer-num {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}

.timer-label-group {
  flex: 1;
}

.timer-hint {
  display: block;
  font-size: 0.72rem;
  color: var(--ink-3);
  margin-bottom: 0.4rem;
  letter-spacing: 0.02em;
}

.timer-bar-track {
  height: 4px;
  background: var(--bg-2);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.timer-bar-fill {
  height: 100%;
  background: var(--accent);
  border-radius: var(--radius-pill);
  width: 100%;
  transition: width 1s linear, background 0.3s ease;
}

.timer-bar-fill.warning { background: #e8a020; }
.timer-bar-fill.danger  { background: var(--wrong); }

/* Question */
.question-wrap {
  min-height: 72px;
  margin-bottom: 1.5rem;
}

.question-text {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1rem, 3.5vw, 1.2rem);
  font-weight: 500;
  color: var(--ink);
  line-height: 1.55;
  transition: opacity 0.25s ease;
}

/* Options */
.options-grid {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  color: var(--ink);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.92rem;
  font-weight: 400;
  cursor: pointer;
  text-align: left;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.option-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  opacity: 0;
  transition: opacity var(--transition);
}

.option-btn:hover:not(:disabled) {
  border-color: var(--accent);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.option-key {
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: var(--bg-2);
  color: var(--ink-3);
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition);
  letter-spacing: 0;
}

.option-btn:hover:not(:disabled) .option-key {
  background: var(--accent);
  color: #fff;
}

/* States */
.option-btn.correct {
  border-color: var(--correct);
  background: var(--correct-bg);
  color: var(--correct);
  transform: translateX(0) !important;
}

.option-btn.correct .option-key {
  background: var(--correct);
  color: #fff;
}

.option-btn.wrong {
  border-color: var(--wrong);
  background: var(--wrong-bg);
  color: var(--wrong);
  transform: translateX(0) !important;
}

.option-btn.wrong .option-key {
  background: var(--wrong);
  color: #fff;
}

.option-btn:disabled { cursor: not-allowed; opacity: 0.7; }

/* Skip row */
.skip-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.btn-skip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-pill);
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--ink-3);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-skip:hover {
  border-color: var(--skip);
  color: var(--skip);
  background: var(--skip-bg);
}

.skip-penalty {
  font-size: 0.72rem;
  color: var(--wrong);
}

.keyboard-hint {
  font-size: 0.72rem;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}

/* ══════════════════════════════════════════════════
   RESULT SCREEN
══════════════════════════════════════════════════ */
.result-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.5rem 2.5rem 2.25rem;
  width: 100%;
  max-width: 460px;
  text-align: center;
  animation: fadeSlideUp 0.5s ease both;
}

.result-emoji {
  font-size: 3.5rem;
  line-height: 1;
  margin-bottom: 1rem;
  animation: bouncePop 0.5s cubic-bezier(0.36, 0.07, 0.19, 0.97) 0.2s both;
}

@keyframes bouncePop {
  0%   { transform: scale(0.5); opacity: 0; }
  60%  { transform: scale(1.2); }
  100% { transform: scale(1);   opacity: 1; }
}

.result-name {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.4rem, 4vw, 1.75rem);
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 1.4rem;
}

.score-display {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.15rem;
  margin-bottom: 0.75rem;
}

.score-big {
  font-family: 'Playfair Display', serif;
  font-size: clamp(3.5rem, 12vw, 5rem);
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
}

.score-denom {
  font-family: 'DM Sans', sans-serif;
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--ink-3);
}

.result-msg {
  font-size: 1rem;
  color: var(--ink-2);
  margin-bottom: 1.75rem;
  font-weight: 400;
}

/* Stats */
.stats-row {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  margin-bottom: 2rem;
}

.stat-box {
  flex: 1;
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 0.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.stat-num {
  font-family: 'Playfair Display', serif;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--ink);
}

.stat-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.result-actions { display: flex; flex-direction: column; gap: 0; }

/* ══════════════════════════════════════════════════
   LEADERBOARD MODAL
══════════════════════════════════════════════════ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(6px);
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  animation: fadeIn 0.25s ease both;
}

.modal-overlay.hidden {
  display: none;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  width: 100%;
  max-width: 400px;
  animation: fadeSlideUp 0.3s ease both;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.modal-title {
  font-family: 'Playfair Display', serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--ink);
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  color: var(--ink-3);
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.modal-close:hover { border-color: var(--wrong); color: var(--wrong); }

.leaderboard-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.leaderboard-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0.9rem;
  background: var(--surface-2);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--ink);
  animation: fadeSlideUp 0.3s ease both;
}

.lb-rank {
  font-family: 'Playfair Display', serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent);
  width: 22px;
  text-align: center;
  flex-shrink: 0;
}

.lb-name { flex: 1; font-weight: 500; }

.lb-score {
  font-weight: 700;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.lb-date {
  font-size: 0.72rem;
  color: var(--ink-3);
}

.lb-pct {
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--ink-3);
}

.lb-loading {
  justify-content: center !important;
  color: var(--ink-3);
  font-style: italic;
  font-size: 0.85rem;
  background: var(--surface-2);
  border: 1.5px dashed var(--border);
}

.leaderboard-list:has(.lb-loading) {
  min-height: 60px;
}

.leaderboard-empty {
  text-align: center;
  color: var(--ink-3);
  font-size: 0.9rem;
  padding: 1rem;
}

.leaderboard-empty.hidden { display: none; }

/* ══════════════════════════════════════════════════
   QUESTION TRANSITION ANIMATION
══════════════════════════════════════════════════ */
@keyframes questionIn {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes questionOut {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(-20px); }
}

.q-enter { animation: questionIn 0.3s ease both; }
.q-exit  { animation: questionOut 0.2s ease both; }

/* ══════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════ */
@media (max-width: 480px) {
  .landing-card,
  .quiz-card,
  .result-card { padding: 1.75rem 1.5rem 1.5rem; }

  .keyboard-hint { display: none; }

  .stats-row { gap: 0.5rem; }

  .timer-row { gap: 0.75rem; }
}

@media (max-width: 360px) {
  .brand-title { font-size: 2.5rem; }
  .quiz-card { padding: 1.5rem 1.25rem; }
  .skip-row { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
}

/* ══════════════════════════════════════════════════
   UTILITY
══════════════════════════════════════════════════ */
.shake {
  animation: shake 0.4s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

@keyframes shake {
  10%, 90% { transform: translateX(-3px); }
  20%, 80% { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-5px); }
  40%, 60% { transform: translateX(5px); }
}

.score-pop {
  animation: bouncePop 0.4s ease both;
}
.leaderboard-list {
  height: 600px;
  overflow-y: scroll; /* always shows scrollbar */
}