:root {
  --bg: #060606;
  --gold: #ffd700;
  --gold-dim: #b8860b;
  --text: #f5f5f5;
  /* More transparent so background photos show through clearly. */
  --glass: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.15);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  width: 100%;
  min-height: 100%;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, 'Segoe UI', 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  -webkit-tap-highlight-color: transparent;
  overflow-x: hidden;
}

.bg-layer {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: background 0.5s ease-in-out;
  pointer-events: none;
}

.red-flash {
  position: fixed;
  inset: 0;
  z-index: 400;
  background: rgba(255, 0, 40, 0.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.08s ease-out;
}

.red-flash.is-on {
  opacity: 1;
}

.app {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: clamp(12px, 3vw, 24px);
  padding-bottom: calc(clamp(16px, 4vh, 40px) + env(safe-area-inset-bottom, 0px));
}

.phase {
  display: none;
  width: 100%;
  max-width: 520px;
  flex-direction: column;
  align-items: stretch;
  gap: clamp(16px, 3vw, 24px);
}

main#app > section.phase[hidden] {
  display: none !important;
}

.phase.is-visible {
  display: flex !important;
}

/* Intro */
.phase-intro {
  align-items: center;
  text-align: center;
}

.intro-logo-wrap {
  margin-top: clamp(8px, 4vh, 32px);
}

.intro-eyebrow {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: rgba(255, 215, 0, 0.65);
  margin-bottom: 0.5rem;
}

.intro-logo {
  font-size: clamp(3rem, 14vw, 5.2rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 0.95;
  color: var(--gold);
  text-shadow: 0 0 40px rgba(255, 215, 0, 0.35), 0 0 80px rgba(255, 215, 0, 0.15);
}

.intro-sub {
  margin-top: 0.35rem;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.55);
}

.glass-panel {
  background: var(--glass);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.18);
}

.video-slot {
  width: 100%;
  max-width: 480px;
  overflow: hidden;
  padding: 0;
}

.hero-video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #111;
}

.video-fallback {
  display: none;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  margin: 12px;
  border-radius: 12px;
}

.video-fallback:not([hidden]) {
  display: flex;
}

.fallback-title {
  font-weight: 800;
  color: var(--gold);
  font-size: 0.9rem;
}

.fallback-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  min-height: 120px;
}

.fallback-grid span {
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), rgba(255, 255, 255, 0.04));
  border: 1px solid rgba(255, 215, 0, 0.2);
}

.intro-hint {
  font-size: 0.78rem;
  color: rgba(255, 215, 0, 0.75);
}

.btn {
  min-height: 50px;
  padding: 14px 20px;
  border-radius: 14px;
  font-weight: 800;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  font-family: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform 0.12s ease, box-shadow 0.2s ease, background 0.2s ease;
  touch-action: manipulation;
}

.btn:active {
  transform: scale(0.98);
}

.btn-gold {
  background: linear-gradient(180deg, #ffe033, var(--gold) 55%, var(--gold-dim));
  color: #0a0a0a;
  box-shadow: 0 8px 28px rgba(255, 215, 0, 0.35);
  width: 100%;
  max-width: 420px;
}

.btn-outline {
  background: rgba(255, 255, 255, 0.05);
  color: var(--gold);
  border: 1px solid var(--glass-border);
  text-decoration: none;
  width: 100%;
}

.btn-battle {
  margin-top: 8px;
}

.btn-option {
  width: 100%;
  text-align: left;
  justify-content: flex-start;
  background: rgba(255, 255, 255, 0.025);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text);
  min-height: 52px;
}

.btn-option:hover {
  border-color: rgba(255, 215, 0, 0.45);
}

/* Quiz */
.phase-quiz {
  padding-bottom: 32px;
}

.phase-survey,
.phase-email,
.phase-result {
  padding-bottom: 32px;
}

.form-card {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-actions-row {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-actions-row-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.form-actions-row-inner .btn {
  flex: 1 1 calc(50% - 6px);
  min-width: 140px;
}

.survey-notify-msg {
  font-size: clamp(0.72rem, 2.8vw, 0.82rem);
  line-height: 1.45;
  color: rgba(255, 215, 0, 0.78);
  text-wrap: balance;
  margin-top: 6px;
}

.form-block {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.form-label {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 800;
  letter-spacing: 0.04em;
}

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

.chip {
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.05);
  color: rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  padding: 10px 12px;
  min-height: 40px;
  font-weight: 800;
  font-size: 0.82rem;
}

.chip.is-active {
  border-color: rgba(255, 215, 0, 0.6);
  box-shadow: 0 0 0 2px rgba(255, 215, 0, 0.12) inset;
}

.cert-card {
  width: 100%;
  min-height: 260px;
  overflow: hidden;
  position: relative;
  background-image:
    linear-gradient(165deg, rgba(0,0,0,0.65), rgba(0,0,0,0.35)),
    url("assets/img/img_ending_01_dokdo_sunrise.jpg");
  background-size: cover;
  background-position: center;
  padding: 18px;
}

.cert-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 10px;
  padding: 18px;
}

.cert-rank {
  font-size: 2.4rem;
  font-weight: 1000;
  letter-spacing: 0.06em;
  color: var(--gold);
  text-shadow: 0 0 22px rgba(255, 215, 0, 0.22);
}

.cert-score {
  font-size: 0.95rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.95);
}

.cert-capture {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.75);
}

/* Mobile: keep hero video visible; reduce optional chrome only */
@media (max-width: 767px) {
  .shorts-slot,
  #fx-confetti {
    display: none !important;
  }
}

.quiz-top {
  padding: 14px 16px;
  text-align: center;
}

.quiz-actions {
  display: flex;
  justify-content: center;
  margin-top: 10px;
}

.quiz-actions--split {
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.quiz-actions--split .btn-small {
  flex: 1 1 calc(50% - 8px);
  min-width: 120px;
  max-width: none;
}

.btn-small {
  min-height: 40px;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 0.85rem;
  max-width: 240px;
}

.rank-badge {
  font-size: 0.72rem;
  letter-spacing: 0.25em;
  color: var(--gold);
  margin-bottom: 4px;
}

.step-line {
  font-weight: 800;
  font-size: 1rem;
}

.landmark-hint {
  margin-top: 6px;
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.45);
  line-height: 1.35;
}

.quiz-card {
  padding: 20px 18px;
}

.quiz-prompt {
  font-size: 0.95rem;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 12px;
}

.quiz-expression {
  font-size: clamp(1.35rem, 5vw, 2rem);
  font-weight: 900;
  color: var(--gold);
  line-height: 1.25;
  word-break: keep-all;
}

.intro-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  max-width: 420px;
  align-items: stretch;
  margin-bottom: 8px;
}

.intro-actions .btn-battle {
  margin-top: 4px;
}

.btn-stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  line-height: 1.2;
}

.btn-stack--tight {
  gap: 0;
}

.btn-line-en {
  font-size: clamp(0.82rem, 3.2vw, 0.95rem);
  font-weight: 800;
  letter-spacing: 0.02em;
}

.btn-line-ko {
  font-size: clamp(0.68rem, 2.6vw, 0.78rem);
  font-weight: 600;
  color: rgba(255, 255, 255, 0.88);
}

.btn-gold .btn-line-ko {
  color: rgba(40, 30, 0, 0.88);
}

.usage-tutorial {
  width: 100%;
  max-width: 480px;
  padding: 12px 14px;
  text-align: center;
}

.usage-tutorial--compact {
  max-width: 100%;
  padding: 10px 12px;
  margin-bottom: 12px;
}

.usage-tutorial-line {
  font-size: clamp(0.72rem, 2.8vw, 0.82rem);
  line-height: 1.45;
  text-wrap: balance;
}

.usage-tutorial-en {
  color: rgba(255, 255, 255, 0.9);
  font-weight: 700;
}

.usage-tutorial-ko {
  color: rgba(255, 215, 0, 0.78);
  margin-top: 4px;
}

.usage-tutorial-line + .usage-tutorial-ko {
  margin-top: 8px;
}

.quiz-usage-warning {
  margin-top: 12px;
  font-size: clamp(0.78rem, 3vw, 0.88rem);
  font-weight: 800;
  color: rgba(255, 200, 120, 0.95);
  text-align: center;
  text-wrap: balance;
}

.phase-quiz--general .quiz-card {
  padding-top: 22px;
  padding-bottom: 22px;
}

.phase-quiz--general .quiz-prompt-en {
  line-height: 1.55;
}

.phase-quiz--general .options-wrap {
  gap: 14px;
}

.phase-quiz--general .options-wrap .btn-option {
  animation: quizOptIn 0.55s ease backwards;
}

.phase-quiz--general .options-wrap .btn-option:nth-child(1) {
  animation-delay: 0.05s;
}

.phase-quiz--general .options-wrap .btn-option:nth-child(2) {
  animation-delay: 0.12s;
}

.phase-quiz--general .options-wrap .btn-option:nth-child(3) {
  animation-delay: 0.19s;
}

.phase-quiz--general .options-wrap .btn-option:nth-child(4) {
  animation-delay: 0.26s;
}

@keyframes quizOptIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.badge-stack {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

.badge-line-en {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
}

.badge-line-ko {
  font-size: 0.62rem;
  color: rgba(255, 215, 0, 0.75);
  letter-spacing: 0.08em;
}

.confetti-root {
  position: fixed;
  inset: 0;
  z-index: 450;
  pointer-events: none;
  overflow: hidden;
}

.confetti-bit {
  position: absolute;
  top: -12px;
  width: 7px;
  height: 11px;
  border-radius: 2px;
  opacity: 0.95;
  animation: confettiDrop 2s ease-out forwards;
}

@keyframes confettiDrop {
  0% {
    transform: translate3d(0, 0, 0) rotate(0deg);
  }
  100% {
    transform: translate3d(var(--dx, 0), 110vh, 0) rotate(720deg);
    opacity: 0.65;
  }
}

.options-wrap {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
}

#hint-video-box.hint-video {
  width: 100%;
  max-width: 480px;
  margin-top: 12px;
  padding: 10px;
  box-sizing: border-box;
}

#hint-video-box.hint-video video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  background: #0a0a0a;
}

.refresh-hint {
  margin-top: 2px;
  font-size: 0.74rem;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.62);
  text-align: center;
  padding: 0 10px;
  text-wrap: balance;
}

.shorts-slot {
  width: 100%;
  padding: 14px;
}

.shorts-placeholder {
  width: 100%;
  min-height: 120px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: rgba(255, 215, 0, 0.82);
  background: linear-gradient(135deg, rgba(255, 215, 0, 0.12), rgba(255, 255, 255, 0.04));
  border: 1px dashed rgba(255, 215, 0, 0.28);
}

/* Modals */
.modal {
  position: fixed;
  inset: 0;
  z-index: 600;
  background: rgba(0, 0, 0, 0.82);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal[hidden] {
  display: none !important;
}

.modal-card {
  width: 100%;
  max-width: 400px;
  max-height: min(88dvh, 560px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.modal-title {
  font-size: 1.15rem;
  color: var(--gold);
  margin-bottom: 4px;
}

.modal-resume-sub {
  text-align: center;
}

.survey-q {
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.75);
}

.glass-input {
  min-height: 48px;
  border-radius: 10px;
  border: 1px solid var(--glass-border);
  background: rgba(0, 0, 0, 0.35);
  color: var(--text);
  padding: 0 12px;
  font-size: 1rem;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.certificate-template {
  background: linear-gradient(160deg, #0f0f12, #1a1208);
  border: 2px solid var(--gold);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  box-shadow: 0 0 30px rgba(255, 215, 0, 0.15);
}

.cert-header {
  font-size: 0.7rem;
  letter-spacing: 0.35em;
  color: var(--gold);
}

.cert-title {
  margin: 12px 0;
  font-size: 1.1rem;
  font-weight: 900;
  color: #fff;
  line-height: 1.35;
}

.cert-body {
  font-size: 0.82rem;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.82);
}

.cert-footer {
  margin-top: 16px;
  font-size: 0.72rem;
  color: rgba(255, 215, 0, 0.7);
}

.dokdo-label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.75);
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 500;
  padding: 12px 20px;
  max-width: 90vw;
  font-size: 0.88rem;
  text-align: center;
}

.toast[hidden] {
  display: none !important;
}

@keyframes kp-pulse {
  0% { transform: scale(1); box-shadow: 0 0 0 rgba(255, 215, 0, 0); }
  35% { transform: scale(1.01); box-shadow: 0 0 24px rgba(255, 215, 0, 0.22); }
  100% { transform: scale(1); box-shadow: 0 0 0 rgba(255, 215, 0, 0); }
}

.kp-correct-pulse {
  animation: kp-pulse 420ms ease-out;
}