:root {
  --bg: #0c1018;
  --bg-soft: #101725;
  --panel: rgba(17, 24, 39, 0.86);
  --panel-strong: rgba(12, 18, 31, 0.96);
  --line: rgba(148, 163, 184, 0.18);
  --line-strong: rgba(129, 140, 248, 0.34);
  --text: #ecf3ff;
  --muted: #9fb0ca;
  --primary: #88ffd6;
  --primary-strong: #65f4c9;
  --accent: #7aa2ff;
  --accent-strong: #a974ff;
  --danger: #ff7f96;
  --warning: #ffd36e;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.28);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(122, 162, 255, 0.22), transparent 34%),
    radial-gradient(circle at top right, rgba(169, 116, 255, 0.18), transparent 28%),
    radial-gradient(circle at bottom left, rgba(136, 255, 214, 0.12), transparent 28%),
    linear-gradient(180deg, #090d15 0%, #0d1320 48%, #0b1018 100%);
  font-family: "Outfit", "Noto Sans SC", sans-serif;
  overflow-x: hidden;
}

button,
input,
label {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

a {
  color: inherit;
}

.bg-orb {
  position: fixed;
  inset: auto;
  border-radius: 999px;
  filter: blur(22px);
  pointer-events: none;
  opacity: 0.68;
  z-index: 0;
}

.orb-1 {
  top: 8%;
  left: -80px;
  width: 220px;
  height: 220px;
  background: rgba(122, 162, 255, 0.22);
}

.orb-2 {
  top: 24%;
  right: -120px;
  width: 300px;
  height: 300px;
  background: rgba(169, 116, 255, 0.18);
}

.orb-3 {
  bottom: -60px;
  left: 14%;
  width: 240px;
  height: 240px;
  background: rgba(136, 255, 214, 0.16);
}

.app-shell {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: 0 16px 34px rgba(101, 244, 201, 0.18);
}

.brand-copy strong {
  display: block;
  font-size: 16px;
  letter-spacing: 0.02em;
}

.brand-copy span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

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

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.hero-panel {
  padding: 36px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 34px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--primary);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 26px;
  margin-top: 22px;
  align-items: stretch;
}

.hero-copy h1 {
  margin: 18px 0 0;
  font-size: clamp(42px, 7vw, 84px);
  line-height: 0.95;
  letter-spacing: -0.05em;
}

.hero-copy p {
  margin: 18px 0 0;
  max-width: 680px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
}

.hero-stats {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 22px;
}

.hero-stat {
  min-width: 132px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.hero-stat strong {
  display: block;
  font-size: 28px;
  line-height: 1;
  letter-spacing: -0.04em;
}

.hero-stat span {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  color: var(--muted);
}

.hero-side {
  display: grid;
  gap: 14px;
}

.hero-card {
  padding: 18px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.03));
  border: 1px solid rgba(255,255,255,0.08);
}

.hero-card h2 {
  margin: 0 0 10px;
  font-size: 16px;
}

.hero-card p,
.hero-card li {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}

.hero-card ul {
  padding-left: 18px;
  margin: 0;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.info-card {
  padding: 24px;
}

.info-kicker {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--primary);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.info-card h2 {
  margin: 14px 0 0;
  font-size: 24px;
  letter-spacing: -0.03em;
}

.info-card p {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.9;
  font-size: 15px;
}

.quiz-card {
  position: relative;
  padding: 22px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(13, 18, 30, 0.94), rgba(10, 14, 24, 0.88));
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 18px 44px rgba(0,0,0,0.22);
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow: hidden;
  min-height: 340px;
}

.quiz-card::after {
  content: "";
  position: absolute;
  inset: auto -30px -70px auto;
  width: 180px;
  height: 180px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(122, 162, 255, 0.22), transparent 68%);
  pointer-events: none;
}

.quiz-card.soon::after {
  background: radial-gradient(circle, rgba(255, 211, 110, 0.18), transparent 68%);
}

.quiz-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.quiz-pill {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  color: var(--primary);
  font-size: 12px;
  letter-spacing: 0.03em;
}

.quiz-status {
  font-size: 12px;
  color: var(--warning);
  letter-spacing: 0.04em;
}

.quiz-card h3 {
  margin: 0;
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.04em;
}

.quiz-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
  font-size: 14px;
}

.quiz-meta-list {
  display: grid;
  gap: 12px;
  margin-top: auto;
}

.quiz-meta-item {
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.05);
}

.quiz-meta-item strong {
  display: block;
  font-size: 13px;
  margin-bottom: 4px;
}

.quiz-meta-item span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.cache-snippet {
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(101, 244, 201, 0.08);
  border: 1px solid rgba(101, 244, 201, 0.14);
}

.cache-snippet strong {
  display: block;
  font-size: 13px;
}

.cache-snippet span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.6;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 16px;
  transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #041019;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 16px 34px rgba(122, 162, 255, 0.24);
}

.btn-secondary {
  color: var(--text);
  font-weight: 700;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
}

.btn-ghost {
  color: var(--muted);
  background: transparent;
  border: 1px solid rgba(255,255,255,0.08);
}

.btn-full {
  width: 100%;
}

.workspace {
  display: none;
  margin-top: 22px;
}

.workspace.active {
  display: block;
}

.workspace-frame {
  padding: 26px;
}

.workspace-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  align-items: flex-start;
}

.workspace-title h2 {
  margin: 10px 0 0;
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1;
  letter-spacing: -0.04em;
}

.workspace-title p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.8;
  max-width: 720px;
}

.workspace-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 18px;
  margin-top: 22px;
}

.intro-card,
.quiz-panel,
.result-panel {
  padding: 22px;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.03));
  border: 1px solid rgba(255,255,255,0.08);
}

.intro-card h3,
.quiz-panel h3,
.result-panel h3 {
  margin: 0 0 14px;
  font-size: 18px;
}

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

.intro-item {
  padding: 14px;
  border-radius: 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
}

.intro-item strong {
  display: block;
  margin-bottom: 6px;
}

.intro-item p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}

.quiz-progress {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 13px;
}

.progress-track {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  overflow: hidden;
}

.progress-fill {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transition: width 0.22s ease;
}

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

.quiz-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.single-question {
  padding: 18px;
  border-radius: 22px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
}

.single-question h3 {
  margin: 8px 0 0;
  font-size: 30px;
  line-height: 1.2;
}

.single-question p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.8;
}

.single-option {
  width: 100%;
  text-align: left;
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 14px;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.single-option:hover {
  transform: translateY(-2px);
  border-color: rgba(255,255,255,0.14);
}

.single-option span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  color: var(--primary);
  font-weight: 700;
  flex: 0 0 auto;
}

.single-option.is-selected {
  border-color: rgba(101, 244, 201, 0.32);
  background: linear-gradient(180deg, rgba(101, 244, 201, 0.12), rgba(122, 162, 255, 0.08));
  box-shadow: 0 18px 36px rgba(122, 162, 255, 0.16);
}

.single-option.is-selected span {
  background: rgba(101, 244, 201, 0.18);
  color: #dffef4;
}

.single-option.is-committing {
  animation: answer-pop 0.24s ease;
}

.single-option:disabled {
  cursor: default;
}

@keyframes answer-pop {
  0% {
    transform: scale(1);
  }
  45% {
    transform: scale(0.985);
  }
  100% {
    transform: scale(1.01);
  }
}

.result-media {
  display: grid;
  place-items: center;
  margin-bottom: 18px;
}

.result-media img {
  width: min(100%, 360px);
  border-radius: 24px;
  object-fit: cover;
  box-shadow: 0 24px 50px rgba(0,0,0,0.3);
}

.result-emoji {
  font-size: 88px;
  line-height: 1;
}

.result-kicker {
  display: inline-flex;
  min-height: 32px;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.07);
  color: var(--primary);
  font-size: 12px;
}

.result-title {
  margin: 14px 0 0;
  font-size: clamp(34px, 6vw, 56px);
  line-height: 0.98;
  letter-spacing: -0.05em;
}

.result-subtitle {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.8;
}

.result-badge {
  display: inline-flex;
  margin-top: 16px;
  min-height: 34px;
  align-items: center;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(122, 162, 255, 0.12);
  color: #dce8ff;
  border: 1px solid rgba(122, 162, 255, 0.18);
  font-size: 13px;
}

.result-sections {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.result-section {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
}

.result-section h4 {
  margin: 0 0 12px;
  font-size: 16px;
}

.result-section p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.section-list {
  display: grid;
  gap: 10px;
}

.section-list-item {
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255,255,255,0.04);
}

.section-list-item strong {
  display: block;
  font-size: 14px;
}

.section-list-item span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  color: #d7e5ff;
  font-size: 13px;
}

.quote {
  position: relative;
  padding-left: 16px;
  color: #dbe4f6;
  font-size: 16px;
  line-height: 1.9;
}

.quote::before {
  content: "“";
  position: absolute;
  left: 0;
  top: -2px;
  color: var(--warning);
  font-size: 22px;
}

.notice {
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(255, 211, 110, 0.08);
  border: 1px solid rgba(255, 211, 110, 0.14);
  color: #ffebba;
  line-height: 1.7;
  font-size: 14px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%) translateY(16px);
  min-width: 200px;
  max-width: calc(100vw - 32px);
  padding: 12px 16px;
  border-radius: 14px;
  background: rgba(4, 10, 19, 0.92);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 16px 34px rgba(0,0,0,0.24);
  color: var(--text);
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
  z-index: 20;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 980px) {
  .hero-grid,
  .intro-grid,
  .card-grid,
  .info-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .app-shell {
    width: min(100vw - 24px, 1120px);
    padding-top: 18px;
  }

  .hero-panel,
  .workspace-frame {
    padding: 20px;
  }

  .topbar,
  .workspace-header {
    flex-direction: column;
    align-items: stretch;
  }

  .workspace-actions,
  .quiz-actions,
  .topbar-actions {
    width: 100%;
  }

  .workspace-actions .btn,
  .quiz-actions .btn,
  .topbar-actions .btn {
    flex: 1 1 auto;
  }

  .hero-copy h1 {
    font-size: 42px;
  }

  .single-question h3 {
    font-size: 24px;
  }
}