/* ============ APP HEADER ============ */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.app-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.app-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--fg) 0%, var(--accent-glow) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.app-nav {
  display: flex;
  gap: 8px;
}

.nav-link {
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--fg-muted);
  text-decoration: none;
  transition: color 0.2s, background 0.2s;
}

.nav-link:hover {
  color: var(--fg);
  background: var(--surface-hover);
}

.nav-link.active {
  color: var(--accent-glow);
  background: rgba(123, 92, 255, 0.12);
}

/* ============ GEN MAIN ============ */
.gen-main {
  position: relative;
  padding: 100px 24px 80px;
  min-height: 100vh;
  overflow: hidden;
}

.gen-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.gen-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: start;
  padding-top: 40px;
}

/* ============ GEN CONTROLS ============ */
.gen-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-glow);
  margin-bottom: 16px;
}

.gen-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--fg) 0%, var(--accent-glow) 60%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gen-subtitle {
  color: var(--fg-muted);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 40px;
}

/* ============ FORM ============ */
.gen-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.prompt-field {
  position: relative;
}

.prompt-textarea {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--fg);
  font-family: 'Outfit', sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  padding: 20px 20px 36px;
  resize: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}

.prompt-textarea::placeholder {
  color: var(--fg-muted);
  opacity: 0.6;
}

.prompt-textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(123, 92, 255, 0.12);
}

.char-count {
  position: absolute;
  bottom: 12px;
  right: 16px;
  font-size: 0.75rem;
  color: var(--fg-muted);
  opacity: 0.6;
  pointer-events: none;
}

.btn-generate {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 32px;
  background: linear-gradient(135deg, var(--accent) 0%, #6a4df0 100%);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, opacity 0.2s;
  box-shadow: 0 4px 24px rgba(123, 92, 255, 0.4);
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

.btn-generate::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  opacity: 0;
  transition: opacity 0.2s;
}

.btn-generate:hover::after { opacity: 1; }

.btn-generate:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 32px rgba(123, 92, 255, 0.5);
}

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

.btn-generate:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-spinner svg {
  animation: spin 0.8s linear infinite;
}

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

.gen-error {
  color: var(--accent-2);
  font-size: 0.9rem;
  padding: 12px 16px;
  background: rgba(255, 107, 157, 0.08);
  border: 1px solid rgba(255, 107, 157, 0.2);
  border-radius: var(--radius-sm);
}

/* ============ EXAMPLES ============ */
.examples-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.examples-label {
  font-size: 0.8rem;
  color: var(--fg-muted);
  font-weight: 500;
}

.example-chip {
  padding: 6px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--fg-muted);
  font-family: 'Outfit', sans-serif;
  font-size: 0.8rem;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.example-chip:hover {
  color: var(--accent-glow);
  border-color: var(--accent);
  background: rgba(123, 92, 255, 0.06);
}

/* ============ PREVIEW ============ */
.gen-preview {
  position: sticky;
  top: 88px;
}

.preview-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  overflow: hidden;
  min-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.preview-empty {
  text-align: center;
  color: var(--fg-muted);
  padding: 60px 40px;
}

.preview-placeholder-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: 0.3;
  color: var(--accent-glow);
}

.preview-empty p {
  font-size: 0.95rem;
  opacity: 0.5;
}

.preview-loading {
  text-align: center;
  color: var(--fg-muted);
  padding: 60px 40px;
}

.preview-loading p {
  margin-top: 20px;
  font-size: 0.95rem;
}

/* Spinner ring */
.gen-spinner-ring {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  margin: 0 auto;
}

/* ============ 3D STICKER EFFECT ============ */
.preview-result {
  width: 100%;
  padding: 40px 32px 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.sticker-3d-wrapper {
  perspective: 800px;
  cursor: pointer;
}

.sticker-3d {
  position: relative;
  width: 280px;
  height: 280px;
  border-radius: 24px;
  transform-style: preserve-3d;
  transition: transform 0.1s ease-out;
  /* Default subtle tilt */
  transform: rotateX(4deg) rotateY(-6deg);
  /* Layered shadow for depth illusion */
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.6)) drop-shadow(0 4px 12px rgba(123,92,255,0.3));
  animation: stickerFloat 5s ease-in-out infinite;
}

@keyframes stickerFloat {
  0%, 100% { transform: rotateX(4deg) rotateY(-6deg) translateY(0); }
  50% { transform: rotateX(2deg) rotateY(-4deg) translateY(-10px); }
}

/* Pause float on hover so JS tilt takes over */
.sticker-3d-wrapper:hover .sticker-3d {
  animation: none;
}

.sticker-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 20px;
  display: block;
  /* White background for transparent PNGs */
  background: #fff;
}

/* Gloss overlay */
.sticker-3d::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(255,255,255,0.18) 0%, transparent 60%);
  pointer-events: none;
}

.preview-prompt-label {
  font-size: 0.85rem;
  color: var(--fg-muted);
  text-align: center;
  max-width: 260px;
  line-height: 1.5;
  font-style: italic;
}

/* ============ GALLERY ============ */
.gallery-section {
  padding: 100px 24px 120px;
  background: var(--bg-subtle);
  position: relative;
  z-index: 1;
}

.gallery-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
  text-align: center;
}

.gallery-page-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--fg) 0%, var(--accent-glow) 60%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
}

.gallery-loading {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--fg-muted);
  padding: 60px 0;
  font-size: 0.95rem;
}

.gallery-empty {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--fg-muted);
  padding: 60px 0;
}

.gallery-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.25s, transform 0.2s, box-shadow 0.25s;
}

.gallery-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.4), 0 0 0 1px rgba(123,92,255,0.2);
}

.gallery-card-img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  background: #fff;
  display: block;
}

.gallery-card-caption {
  padding: 12px 14px;
  font-size: 0.8rem;
  color: var(--fg-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.4;
}

/* ============ LANDING NAV CTA ============ */
.hero-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  margin-top: 40px;
  background: linear-gradient(135deg, var(--accent) 0%, #6a4df0 100%);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  box-shadow: 0 4px 24px rgba(123, 92, 255, 0.4);
  transition: transform 0.15s, box-shadow 0.2s;
}

.hero-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 36px rgba(123, 92, 255, 0.55);
}

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  .gen-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .gen-preview {
    position: static;
  }

  .sticker-3d {
    width: 240px;
    height: 240px;
  }
}

@media (max-width: 600px) {
  .gen-main { padding: 88px 16px 60px; }
  .gallery-section { padding: 60px 16px 80px; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .gen-layout { gap: 32px; }
  .sticker-3d { width: 200px; height: 200px; }
}