:root {
  /* Brighter, Crystalline Theme */
  --bg-color: oklch(98% 0.01 250);
  --bg-gradient: linear-gradient(135deg, oklch(98% 0.02 220), oklch(96% 0.03 175));
  --card-bg: rgba(255, 255, 255, 0.78);
  --accent-color: oklch(58% 0.17 225);
  --accent-glow: oklch(58% 0.17 225 / 0.25);
  --text-primary: oklch(20% 0.02 250);
  --text-secondary: oklch(45% 0.02 250);
  --border-color: rgba(15, 23, 42, 0.09);
  
  --glass-effect: blur(16px) saturate(120%);
  --transition-speed: 0.4s;
  --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.05), 0 1px 8px rgba(0, 0, 0, 0.02);
}

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

body {
  font-family: 'Inter', 'Noto Sans KR', system-ui, -apple-system, sans-serif;
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Subtle pattern overlay */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(var(--accent-glow) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.2;
  pointer-events: none;
}

h1, h2, h3 {
  letter-spacing: -0.03em;
}

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

header {
  position: relative;
  text-align: center;
  margin-bottom: 3rem;
}

.global-nav {
  display: flex;
  justify-content: center;
  margin-top: 1.5rem;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.btn-nav-home {
  background: var(--card-bg);
  backdrop-filter: var(--glass-effect);
  -webkit-backdrop-filter: var(--glass-effect);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  box-shadow: var(--shadow-soft);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.6rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.2s ease;
}

.btn-nav-home:hover {
  background: white;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.06);
}

.btn-nav-home .icon {
  font-size: 1.1rem;
}

header h1 {
  font-size: clamp(2.6rem, 7vw, 4.6rem);
  background: linear-gradient(135deg, var(--text-primary), var(--accent-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
  font-weight: 800;
  transition: opacity 0.2s ease;
}

header h1:hover {
  opacity: 0.85;
}

header p {
  color: var(--text-secondary);
  font-size: 1.12rem;
  font-weight: 500;
}

.eyebrow {
  color: var(--accent-color);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0;
  margin-bottom: 0.4rem;
  text-transform: uppercase;
}

.app-panel {
  margin-bottom: 1.5rem;
}

.panel-heading {
  margin-bottom: 2rem;
}

.panel-heading h2 {
  font-size: 1.65rem;
  margin-bottom: 0.5rem;
}

.panel-heading p,
.muted {
  color: var(--text-secondary);
}

.status-copy {
  margin-top: 1rem;
}


/* Common Form Styles */
input, select, button {
  font-family: inherit;
  font-size: 1rem;
}

.card {
  background: var(--card-bg);
  backdrop-filter: var(--glass-effect);
  -webkit-backdrop-filter: var(--glass-effect);
  border: 1px solid var(--border-color);
  border-radius: 32px;
  padding: 2.5rem;
  box-shadow: var(--shadow-soft);
}

button {
  cursor: pointer;
  border: none;
  border-radius: 16px;
  padding: 1rem 2rem;
  font-weight: 600;
  transition: all var(--transition-speed);
}

.btn-primary {
  background: var(--accent-color);
  color: white;
  box-shadow: 0 8px 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 25px var(--accent-glow);
  filter: brightness(1.1);
}

.btn-secondary {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: rgba(0, 0, 0, 0.08);
}

/* Wizard Step Indicator */
.step-indicator {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

.step-dot {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  position: relative;
}

.step-dot::after {
  content: "";
  width: 12px;
  height: 12px;
  background: var(--border-color);
  border-radius: 50%;
  transition: all 0.3s;
}

.step-dot.active {
  color: var(--accent-color);
}

.step-dot.active::after {
  background: var(--accent-color);
  box-shadow: 0 0 10px var(--accent-glow);
  transform: scale(1.3);
}

/* Utilities */
.hidden { display: none; }

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 10px;
  background: rgba(0, 0, 0, 0.05);
  border-radius: 5px;
  overflow: hidden;
  position: relative;
}

.progress-fill {
  height: 100%;
  width: 40%;
  background: var(--accent-color);
  border-radius: 5px;
  box-shadow: 0 0 15px var(--accent-glow);
  animation: progressMove 2s infinite ease-in-out;
}

@keyframes progressMove {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(300%); }
}

/* Video Preview */
.video-preview-box {
  background: #000;
  border-radius: 24px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.1);
  cursor: pointer;
  overflow: hidden;
  position: relative;
}

.video-preview-box img {
  aspect-ratio: 16 / 9;
  display: block;
  object-fit: cover;
  width: 100%;
}

.preview-badge {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 999px;
  color: var(--text-primary);
  font-size: 0.72rem;
  font-weight: 800;
  left: 1rem;
  padding: 0.35rem 0.65rem;
  position: absolute;
  top: 1rem;
}


.play-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: white;
  transition: all 0.3s;
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.video-preview-box:hover .play-overlay {
  transform: translate(-50%, -50%) scale(1.1);
  background: var(--accent-color);
}

/* Modals */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(15px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-content {
  max-width: 500px;
  width: 100%;
}

/* Payment Options */
.payment-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.payment-card {
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: white;
}

.payment-card.selected {
  border-color: var(--accent-color);
  background: var(--accent-glow);
  transform: scale(1.02);
}

.payment-card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.payment-card .price {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent-color);
}

.result-actions,
.payment-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
}

.result-actions .btn-primary,
.payment-actions .btn-primary {
  flex: 1;
}

.checkout-layout {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1.2fr 1fr;
}

.checkout-visual {
  background: #000;
  border-radius: 24px;
  overflow: hidden;
  position: relative;
}

.payment-sample-img {
  aspect-ratio: 4 / 5;
  display: block;
  filter: brightness(0.9);
  object-fit: cover;
  transition: transform 0.5s ease;
  width: 100%;
}

.checkout-visual:hover .payment-sample-img {
  transform: scale(1.05);
}

.visual-overlay {
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  bottom: 0;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  left: 0;
  padding: 1.5rem 1rem 1rem;
  position: absolute;
  width: 100%;
}

.checkout-summary {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 1.5rem;
}

.checkout-label {
  color: var(--accent-color);
  font-size: 0.82rem;
  font-weight: 800;
}

.checkout-summary h3 {
  font-size: 1.25rem;
  margin: 0.45rem 0;
}

.checkout-price {
  color: var(--accent-color);
  display: block;
  font-size: 2rem;
  margin-top: 1.25rem;
}

.payment-options .payment-card {
  color: var(--text-primary);
  font-family: inherit;
  text-align: left;
}

.payment-card span,
.payment-card strong {
  display: block;
}

.payment-card strong {
  color: var(--accent-color);
  font-size: 1.35rem;
  margin-top: 0.35rem;
}

.payment-status {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  color: var(--text-primary);
  margin-top: 1rem;
  padding: 1rem;
}

@media (max-width: 720px) {
  body::before {
    opacity: 0.12;
    background-size: 28px 28px;
  }

  .container {
    padding: 1rem 0.75rem 1.5rem;
  }

  header {
    margin-bottom: 1.25rem;
    text-align: left;
  }

  header h1 {
    line-height: 1.05;
    margin-bottom: 0.35rem;
  }

  header p {
    font-size: 0.98rem;
  }

  .eyebrow {
    margin-bottom: 0.2rem;
  }

  .card {
    border-radius: 18px;
    padding: 1rem;
  }

  .app-panel {
    margin-bottom: 1rem;
  }

  .panel-heading {
    margin-bottom: 1rem;
  }

  .panel-heading h2 {
    font-size: 1.25rem;
  }

  .panel-heading p {
    font-size: 0.92rem;
  }

  .result-actions,
  .payment-actions {
    gap: 0.75rem;
  }

  .btn-primary,
  .btn-secondary,
  .payment-card {
    width: 100%;
  }

  .checkout-layout,
  .payment-options {
    grid-template-columns: 1fr;
  }

  .checkout-summary {
    padding: 1rem;
  }

  .checkout-summary h3 {
    font-size: 1.1rem;
  }

  .checkout-price {
    font-size: 1.6rem;
  }

  .result-actions,
  .payment-actions {
    flex-direction: column;
  }
}


.home-panel {
  padding: 1.5rem;
}

.home-heading {
  align-items: flex-end;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.home-heading > div:first-child {
  min-width: 0;
}

.home-heading > p {
  max-width: 28rem;
  text-align: right;
}

.section-kicker {
  color: var(--accent-color);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  margin-bottom: 0.35rem;
  text-transform: uppercase;
}

.home-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.mode-card {
  --tone: var(--accent-color);
  align-items: flex-start;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(248, 250, 252, 0.88));
  border: 1px solid var(--border-color);
  border-radius: 20px;
  box-shadow: var(--shadow-soft);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  min-height: 188px;
  overflow: hidden;
  padding: 1.2rem;
  position: relative;
  text-align: left;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.mode-card::before {
  background: var(--tone);
  content: "";
  height: 4px;
  left: 0;
  position: absolute;
  top: 0;
  width: 100%;
}

.mode-card[data-tone="sky"] { --tone: oklch(58% 0.17 225); }
.mode-card[data-tone="amber"] { --tone: oklch(72% 0.16 70); }
.mode-card[data-tone="mint"] { --tone: oklch(66% 0.14 165); }
.mode-card[data-tone="cobalt"] { --tone: oklch(56% 0.18 255); }
.mode-card[data-tone="violet"] { --tone: oklch(58% 0.18 290); }
.mode-card[data-tone="violet"] { --tone: oklch(58% 0.18 290); }

.mode-card:hover {
  border-color: color-mix(in oklab, var(--tone) 35%, var(--border-color));
  box-shadow: 0 16px 34px rgba(15, 23, 42, 0.08);
  transform: translateY(-2px);
}

.mode-badge {
  background: color-mix(in oklab, var(--tone) 14%, white);
  border-radius: 999px;
  color: var(--tone);
  display: inline-flex;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.22rem 0.6rem;
}

.mode-card strong {
  font-size: 1.15rem;
  line-height: 1.25;
}

.mode-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.mode-cta {
  color: var(--tone);
  font-size: 0.88rem;
  font-weight: 800;
  margin-top: auto;
}

.builder-header {
  align-items: flex-start;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.builder-subtitle {
  color: var(--text-secondary);
  margin-top: 0.25rem;
  max-width: 45rem;
}

.builder-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.builder-footer {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.full-width {
  width: 100%;
}

.loading-main-focus {
  text-align: center;
  padding: 2rem 0;
}

.loading-title {
  font-size: clamp(1.5rem, 5vw, 2.2rem);
  margin-bottom: 2rem;
  font-weight: 800;
  line-height: 1.2;
}

.highlight {
  color: var(--accent-color);
  font-size: 1rem;
  margin-bottom: 1rem;
  display: block;
}

.progress-bar.big {
  height: 16px;
  border-radius: 8px;
}

.status-copy.prominent {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 1.5rem;
}

.bottom-anchor {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px dashed var(--border-color);
}

.ad-disclaimer {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1.25rem;
}

.ad-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.result-actions.vertical,
.payment-actions.vertical {
  flex-direction: column;
}

.ad-strip {
  margin: 1rem 0 1.25rem;
}

.loading-progress-area {
  margin-bottom: 2.5rem;
}

.ad-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(248, 250, 252, 0.9));
  border: 1px solid var(--border-color);
  border-radius: 16px;
  min-height: 120px;
  padding: 1rem;
}

.ad-label {
  color: var(--accent-color);
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0;
  margin-bottom: 0.4rem;
  text-transform: uppercase;
}

.ad-card strong {
  display: block;
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.ad-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.checkpoint {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

@media (max-width: 720px) {
  .home-panel {
    padding: 1rem;
  }

  .home-heading,
  .builder-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .home-heading > p {
    max-width: none;
    text-align: left;
  }

  .home-grid,
  .ad-grid {
    grid-template-columns: 1fr;
  }

  .loading-title {
    font-size: 1.6rem;
  }

  .mode-card {
    min-height: 0;
  }

  .builder-actions {
    width: 100%;
  }

  .builder-actions button,
  .payment-actions button,
  .result-actions button {
    width: 100%;
  }
}