:root {
  --bg: #0f172a;
  --panel: #111827;
  --panel-soft: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #22d3ee;
  --good: #22c55e;
  --warn: #f59e0b;
  --bad: #ef4444;
  --border: #374151;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: Inter, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(circle at 20% 0%, #172554 0%, var(--bg) 50%);
  color: var(--text);
  min-height: 100%;
  position: relative;
  overflow: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  width: 56vw;
  height: 56vw;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: -1;
  opacity: 0.32;
}

body::before {
  left: -20vw;
  top: -24vw;
  background: #0ea5e9;
  animation: bg-float-a 18s ease-in-out infinite;
}

body::after {
  right: -24vw;
  bottom: -26vw;
  background: #a855f7;
  animation: bg-float-b 22s ease-in-out infinite;
}

.app-shell {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
  position: relative;
  z-index: 1;
  height: 100%;
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

#app {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  touch-action: pan-y;
  scrollbar-width: auto;
  scrollbar-color: color-mix(in srgb, var(--accent) 42%, var(--border)) transparent;
}

#app::-webkit-scrollbar {
  width: 18px;
}

#app::-webkit-scrollbar-track {
  background: transparent;
}

#app::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--accent) 42%, var(--border));
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: content-box;
}

.topbar h1 {
  margin: 0;
  font-size: 2rem;
}

.topbar-title {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.de-flag {
  width: 28px;
  height: 18px;
  border-radius: 4px;
  border: 1px solid color-mix(in srgb, var(--border) 70%, #ffffff);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 12%, transparent);
  background: linear-gradient(
    to bottom,
    #1f2937 0%,
    #1f2937 33.33%,
    #ef4444 33.33%,
    #ef4444 66.66%,
    #facc15 66.66%,
    #facc15 100%
  );
}

.topbar {
  margin-bottom: 12px;
}

.topbar-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.topbar-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.icon-btn {
  min-width: 44px;
  height: 44px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
}

.topbar p {
  margin: 8px 0 0;
  color: var(--muted);
}

.footer-badge-wrap {
  margin-top: 16px;
  display: flex;
  justify-content: center;
}

.footer-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel-soft) 82%, #0b1220);
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 120ms ease, color 120ms ease, box-shadow 120ms ease;
}

.footer-badge:hover {
  color: var(--text);
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 14%, transparent);
}

.level-grid {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.level-card,
.quiz-card,
.result-card {
  background: linear-gradient(160deg, var(--panel), var(--panel-soft));
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.level-card {
  position: relative;
  overflow: hidden;
}

.corner-ribbon {
  position: absolute;
  bottom: 6px;
  right: -46px;
  transform: rotate(-35deg);
  min-width: 148px;
  text-align: center;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  padding: 6px 8px;
  z-index: 2;
  box-shadow: 0 8px 16px rgba(2, 6, 23, 0.35);
}

.corner-ribbon-pass {
  color: #052e16;
  background: linear-gradient(135deg, #86efac, #22c55e);
  border: 1px solid color-mix(in srgb, var(--good) 65%, #052e16);
}

.corner-ribbon-new {
  color: #422006;
  background: linear-gradient(135deg, #fcd34d, #f59e0b);
  border: 1px solid color-mix(in srgb, var(--warn) 68%, #422006);
}

.corner-ribbon-fail {
  color: #450a0a;
  background: linear-gradient(135deg, #fca5a5, #ef4444);
  border: 1px solid color-mix(in srgb, var(--bad) 70%, #450a0a);
}

.level-card-passed {
  border-color: color-mix(in srgb, var(--good) 68%, var(--border));
}

.level-card-new {
  border-color: color-mix(in srgb, var(--warn) 62%, var(--border));
}

.level-card-failed {
  border-color: color-mix(in srgb, var(--bad) 62%, var(--border));
}

.level-card-passed:hover {
  border-color: color-mix(in srgb, var(--good) 82%, #14532d);
  box-shadow: 0 10px 28px rgba(34, 197, 94, 0.18);
}

.level-card-new:hover {
  border-color: color-mix(in srgb, var(--warn) 78%, #78350f);
  box-shadow: 0 10px 28px rgba(245, 158, 11, 0.18);
}

.level-card-failed:hover {
  border-color: color-mix(in srgb, var(--bad) 80%, #7f1d1d);
  box-shadow: 0 10px 28px rgba(239, 68, 68, 0.18);
}

.level-card:hover,
.quiz-card:hover,
.review-item:hover {
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--accent) 55%, var(--border));
  box-shadow: 0 10px 28px rgba(6, 182, 212, 0.14);
}

.level-card h3 {
  margin: 0 0 10px;
}

.stats {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
  font-size: 0.95rem;
}

.stat-label {
  color: var(--muted);
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-pass {
  background: color-mix(in srgb, var(--good) 20%, transparent);
  color: var(--good);
  border: 1px solid color-mix(in srgb, var(--good) 45%, transparent);
}

.badge-fail {
  background: color-mix(in srgb, var(--bad) 20%, transparent);
  color: #fda4af;
  border: 1px solid color-mix(in srgb, var(--bad) 45%, transparent);
}

.badge-new {
  background: color-mix(in srgb, var(--warn) 20%, transparent);
  color: #fcd34d;
  border: 1px solid color-mix(in srgb, var(--warn) 45%, transparent);
}

.btn {
  border: 1px solid var(--border);
  background: #111827;
  color: var(--text);
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
  transition: transform 120ms ease, border-color 120ms ease, box-shadow 120ms ease;
}

.btn:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 18%, transparent);
}

.btn:active {
  transform: translateY(1px) scale(0.99);
}

.btn-primary {
  background: linear-gradient(135deg, #0891b2, #155e75);
  border-color: #164e63;
}

.quiz-wrap {
  margin-top: 20px;
  display: grid;
  gap: 14px;
}

.quiz-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

.progress-bar {
  width: 100%;
  height: 12px;
  background: #0b1220;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #22d3ee, #14b8a6);
}

.question {
  font-size: 1.2rem;
  margin: 0;
}

.question-image-wrap {
  margin-top: 12px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: #0b1220;
}

.question-image {
  display: block;
  width: 100%;
  max-height: 280px;
  object-fit: cover;
}

.options {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.option {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px;
  cursor: pointer;
  background: #0b1220;
  color: var(--text);
  font-size: 1rem;
  font-weight: 500;
  transition: transform 120ms ease, border-color 120ms ease, background 120ms ease;
}

.option:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.option.selected {
  border-color: #06b6d4;
  background: color-mix(in srgb, #0891b2 25%, #0b1220);
}

.option.correct {
  border-color: var(--good);
}

.option.wrong {
  border-color: var(--bad);
}

.actions {
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

.result-title {
  margin-top: 0;
}

.combo-text {
  margin: 8px 0;
  font-size: 1.2rem;
  font-weight: 800;
  color: #facc15;
  text-shadow: 0 0 14px rgba(250, 204, 21, 0.35);
}

.combo-toast {
  position: fixed;
  left: 50%;
  top: 18%;
  transform: translate(-50%, -16px) scale(0.96);
  opacity: 0;
  background: linear-gradient(135deg, #0f172a, #111827);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 10px 16px;
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.01em;
  z-index: 2400;
  box-shadow: 0 12px 26px rgba(2, 6, 23, 0.45);
  transition: transform 220ms ease, opacity 220ms ease, border-color 180ms ease;
  pointer-events: none;
}

.combo-toast.show {
  transform: translate(-50%, 0) scale(1);
  opacity: 1;
}

.combo-toast-good {
  color: #86efac;
  border-color: color-mix(in srgb, var(--good) 60%, var(--border));
  text-shadow: 0 0 12px rgba(34, 197, 94, 0.3);
}

.combo-toast-bad {
  color: #fca5a5;
  border-color: color-mix(in srgb, var(--bad) 60%, var(--border));
  text-shadow: 0 0 12px rgba(239, 68, 68, 0.28);
}

.center {
  text-align: center;
}

.player-rank-strip {
  margin-bottom: 14px;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.leaderboard-card {
  margin-bottom: 14px;
}

.scores-page {
  display: grid;
  gap: 14px;
}

.scores-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.leaderboard-card h3 {
  margin: 0 0 10px;
}

.leaderboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.leaderboard-header h3 {
  margin: 0;
}

.scores-select {
  border: 1px solid var(--border);
  background: #0b1220;
  color: var(--text);
  border-radius: 8px;
  padding: 8px 10px;
  min-width: 180px;
}

.scores-select:focus {
  outline: none;
  border-color: var(--accent);
}

.scores-name-message {
  margin: 6px 0 0;
  width: 100%;
  font-size: 0.92rem;
  min-height: 1.2rem;
  color: var(--muted);
}

.scores-name-message-success {
  color: #86efac;
}

.scores-name-message-error {
  color: #fca5a5;
}

.scores-name-message-muted {
  color: var(--muted);
}

.leaderboard-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.leaderboard-list li {
  display: grid;
  grid-template-columns: 52px 1fr auto;
  gap: 8px;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  background: #0b1220;
}

.leaderboard-pager {
  margin-top: 10px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.leaderboard-pager .btn {
  padding: 7px 11px;
}

.leader-rank {
  color: var(--accent);
  font-weight: 700;
}

.leader-name {
  font-weight: 600;
}

.leader-score {
  color: var(--muted);
  font-size: 0.92rem;
}

.level-result-board {
  margin-top: 14px;
  text-align: left;
}

.progress-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.progress-list li {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #0b1220;
  padding: 9px 10px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}

.review-list {
  display: grid;
  gap: 12px;
}

.review-item h3 {
  margin: 0;
}

.review-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.review-answer {
  margin: 8px 0 0;
}

.review-correct {
  color: #86efac;
}

.review-wrong {
  color: #fca5a5;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 1000;
}

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

.modal-card {
  width: min(440px, 100%);
  background: linear-gradient(160deg, var(--panel), var(--panel-soft));
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}

.modal-card h3 {
  margin: 0 0 8px;
}

.modal-card p {
  margin: 0;
  color: var(--muted);
}

.modal-form {
  margin-top: 12px;
  display: grid;
  gap: 10px;
}

.modal-input {
  width: 100%;
  border: 1px solid var(--border);
  background: #0b1220;
  color: var(--text);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 1rem;
}

.modal-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 14%, transparent);
}

.modal-error {
  margin: 0;
  color: #fca5a5;
  font-size: 0.92rem;
}

.modal-actions {
  justify-content: flex-end;
}

.confetti-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 2500;
}

.confetti-piece {
  position: absolute;
  top: -14px;
  width: 9px;
  height: 16px;
  opacity: 0.95;
  border-radius: 2px;
  animation-name: confetti-fall;
  animation-timing-function: linear;
  animation-fill-mode: forwards;
}

@keyframes confetti-fall {
  0% {
    transform: translate3d(0, -8vh, 0) rotate(0deg);
  }
  100% {
    transform: translate3d(var(--drift, 0px), 112vh, 0) rotate(720deg);
    opacity: 0;
  }
}

@keyframes bg-float-a {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(7vw, 4vw, 0) scale(1.08);
  }
}

@keyframes bg-float-b {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(-6vw, -5vw, 0) scale(1.1);
  }
}