/* ============================================
   Story Nook — A cozy storybook maker
   for kids and parents
   ============================================ */

:root {
  --coral: #FF8C6B;
  --coral-deep: #E8654A;
  --teal: #6BC5E8;
  --teal-deep: #4AA8CC;
  --sunshine: #FFD166;
  --sunshine-deep: #F0B830;
  --lavender: #C3A6E0;
  --mint: #7EDDB5;
  --cream: #FFF8EE;
  --cream-dark: #F5ECD8;
  --paper: #FFFDF7;
  --ink: #2D1B4E;
  --ink-soft: #5C4A7A;
  --ink-faint: #8B7BAA;
  --surface: rgba(255, 253, 247, 0.92);
  --surface-hover: rgba(255, 253, 247, 1);
  --stroke: rgba(45, 27, 78, 0.10);
  --stroke-strong: rgba(45, 27, 78, 0.18);
  --shadow-sm: 0 2px 8px rgba(45, 27, 78, 0.08);
  --shadow-md: 0 8px 30px rgba(45, 27, 78, 0.10);
  --shadow-lg: 0 16px 50px rgba(45, 27, 78, 0.14);
  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --font-display: 'Fredoka', 'Baloo 2', sans-serif;
  --font-body: 'Nunito', 'Quicksand', sans-serif;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  color: var(--ink);
  background: var(--cream);
  background-image:
    radial-gradient(ellipse at 20% 0%, rgba(255, 140, 107, 0.18) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 10%, rgba(107, 197, 232, 0.16) 0%, transparent 45%),
    radial-gradient(ellipse at 50% 100%, rgba(195, 166, 224, 0.14) 0%, transparent 50%);
  overflow-x: hidden;
}

/* ---- Floating decorations ---- */
.decoration {
  position: fixed;
  pointer-events: none;
  z-index: 0;
  opacity: 0.35;
}

.deco-star {
  width: 20px;
  height: 20px;
  background: var(--sunshine);
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
  animation: float-gentle 6s ease-in-out infinite;
}

.deco-star-1 { top: 8%; left: 6%; animation-delay: 0s; width: 16px; height: 16px; }
.deco-star-2 { top: 14%; right: 10%; animation-delay: 2s; width: 22px; height: 22px; opacity: 0.25; }
.deco-star-3 { bottom: 20%; left: 4%; animation-delay: 4s; width: 14px; height: 14px; opacity: 0.3; }

.deco-cloud {
  width: 80px;
  height: 32px;
  background: white;
  border-radius: 32px;
  position: relative;
  animation: drift 20s linear infinite;
}
.deco-cloud::before {
  content: '';
  position: absolute;
  width: 36px;
  height: 36px;
  background: white;
  border-radius: 50%;
  top: -18px;
  left: 16px;
}
.deco-cloud::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 24px;
  background: white;
  border-radius: 50%;
  top: -10px;
  right: 12px;
}

.deco-cloud-1 { top: 5%; left: -80px; opacity: 0.18; animation-duration: 35s; }
.deco-cloud-2 { top: 30%; left: -80px; opacity: 0.12; animation-duration: 45s; animation-delay: 10s; width: 100px; height: 38px; }

.deco-moon {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--sunshine);
  box-shadow: inset -12px -4px 0 0 var(--cream);
  top: 6%;
  right: 5%;
  opacity: 0.2;
  animation: float-gentle 8s ease-in-out infinite;
  animation-delay: 1s;
}

@keyframes float-gentle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes drift {
  0% { transform: translateX(0); }
  100% { transform: translateX(calc(100vw + 160px)); }
}

/* ---- Header ---- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 248, 238, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--stroke);
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 0.45rem;
  white-space: nowrap;
}

.logo-icon {
  display: flex;
  align-items: center;
}

.tab-nav {
  display: flex;
  gap: 0.25rem;
  background: rgba(45, 27, 78, 0.05);
  border-radius: 999px;
  padding: 4px;
}

.tab-btn {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.92rem;
  border: none;
  background: transparent;
  color: var(--ink-soft);
  padding: 0.45rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.tab-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.tab-btn:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.5);
}

.tab-btn.active {
  background: white;
  color: var(--ink);
  box-shadow: var(--shadow-sm);
  font-weight: 600;
}

/* ---- Main ---- */
.app-main {
  position: relative;
  z-index: 1;
  width: min(900px, calc(100% - 1.5rem));
  margin: 1.5rem auto 3rem;
}

.tab-panel {
  display: none;
  animation: fadeSlideIn 0.35s ease;
}

.tab-panel.active {
  display: block;
}

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- CREATE TAB ---- */
.create-card {
  background: var(--surface);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  padding: 2rem 2rem 1.5rem;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.create-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 5px;
  background: linear-gradient(90deg, var(--coral), var(--sunshine), var(--teal), var(--lavender));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.create-header {
  text-align: center;
  margin-bottom: 1.5rem;
}

.create-header h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.75rem;
  margin: 0;
  background: linear-gradient(135deg, var(--coral-deep), var(--lavender));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.create-header p {
  font-size: 1.05rem;
  color: var(--ink-soft);
  margin: 0.4rem 0 0;
}

.story-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.input-group label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink);
}

.input-group-small {
  flex: 1;
}

textarea, select {
  font-family: var(--font-body);
  font-size: 1rem;
  width: 100%;
  border: 2px solid var(--stroke-strong);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.85rem;
  background: white;
  color: var(--ink);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  resize: vertical;
}

textarea:focus, select:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(107, 197, 232, 0.25);
}

textarea::placeholder {
  color: var(--ink-faint);
}

.form-row {
  display: flex;
  align-items: flex-end;
  gap: 0.75rem;
}

/* ---- Buttons ---- */
.btn {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  border-radius: 999px;
  padding: 0.7rem 1.4rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
}

.btn-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.btn-voice {
  background: var(--teal);
  color: white;
  padding: 0.7rem 1.2rem;
}

.btn-voice:hover:not(:disabled) {
  background: var(--teal-deep);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(107, 197, 232, 0.35);
}

.button-row {
  display: flex;
  gap: 0.6rem;
}

.btn-magic {
  flex: 1;
  background: linear-gradient(135deg, var(--coral), var(--coral-deep));
  color: white;
  font-size: 1.15rem;
  padding: 0.9rem 1.6rem;
  box-shadow: 0 4px 18px rgba(255, 140, 107, 0.35);
  letter-spacing: 0.01em;
}

.btn-magic:hover:not(:disabled) {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 28px rgba(255, 140, 107, 0.45);
}

.btn-magic:active:not(:disabled) {
  transform: translateY(0) scale(0.98);
}

.btn-surprise {
  background: linear-gradient(135deg, var(--sunshine), var(--sunshine-deep));
  color: white;
  font-size: 1rem;
  padding: 0.9rem 1.4rem;
  box-shadow: 0 4px 18px rgba(255, 209, 102, 0.35);
  white-space: nowrap;
}

.btn-surprise:hover:not(:disabled) {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 28px rgba(255, 209, 102, 0.45);
}

.btn-surprise:active:not(:disabled) {
  transform: translateY(0) scale(0.98);
}

.btn-sparkle {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--sunshine);
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
  animation: twinkle 2s ease-in-out infinite;
}

.btn-sparkle:last-child { animation-delay: 1s; }

@keyframes twinkle {
  0%, 100% { opacity: 0.6; transform: scale(1) rotate(0deg); }
  50% { opacity: 1; transform: scale(1.3) rotate(20deg); }
}

/* ---- Status ---- */
.status {
  text-align: center;
  min-height: 1.4rem;
  color: var(--ink-soft);
  font-weight: 600;
  margin-top: 0.5rem;
}

.status:empty { display: none; }

/* ---- Loading indicator ---- */
.loading-indicator {
  text-align: center;
  padding: 3rem 1rem 2rem;
  animation: fadeSlideIn 0.4s ease;
}

.loading-book {
  display: inline-flex;
  gap: 8px;
  align-items: flex-end;
}

.loading-page {
  width: 28px;
  border-radius: 6px;
  animation: bookBounce 1.2s ease-in-out infinite;
}

.loading-page-1 {
  height: 80px;
  background: var(--coral);
  animation-delay: 0s;
}
.loading-page-2 {
  height: 96px;
  background: var(--teal);
  animation-delay: 0.2s;
}
.loading-page-3 {
  height: 72px;
  background: var(--sunshine);
  animation-delay: 0.4s;
}

@keyframes bookBounce {
  0%, 100% { transform: scaleY(1); }
  50% { transform: scaleY(0.6); }
}

.loading-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--ink);
  margin: 1.5rem 0 0;
  animation: pulse-text 2s ease-in-out infinite;
}

.loading-subtext {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--ink-faint);
  margin: 0.5rem 0 0;
}

@keyframes pulse-text {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* ---- LIBRARY TAB ---- */
.library-header {
  margin-bottom: 1.25rem;
}

.library-header h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.6rem;
  margin: 0;
  text-align: center;
}

.stories-shelf {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.book-card {
  background: var(--surface);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.book-card:hover {
  transform: translateY(-4px) rotate(-0.5deg);
  box-shadow: var(--shadow-lg);
  border-color: var(--teal);
}

.book-card-cover {
  height: 160px;
  position: relative;
  overflow: hidden;
}

.book-card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.book-card-cover-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  font-family: var(--font-display);
}

.book-card-cover-placeholder:nth-child(1) { background: linear-gradient(135deg, rgba(255,140,107,0.25), rgba(255,209,102,0.25)); }

.book-card-body {
  padding: 0.85rem 1rem;
}

.book-card-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  margin: 0;
  line-height: 1.3;
  color: var(--ink);
}

.book-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.4rem;
  font-size: 0.85rem;
  color: var(--ink-faint);
}

.book-card-pages {
  background: rgba(107, 197, 232, 0.15);
  color: var(--teal-deep);
  font-weight: 600;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.8rem;
}

.shelf-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 3rem 1rem;
  color: var(--ink-faint);
  font-size: 1.1rem;
}

.shelf-empty p {
  margin: 0;
}

/* ---- READER TAB ---- */
.reader-empty {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--ink-soft);
}

.empty-book-icon {
  margin-bottom: 1rem;
  opacity: 0.6;
  animation: float-gentle 4s ease-in-out infinite;
}

.reader-empty p {
  font-size: 1.1rem;
  margin: 0;
}

.reader-active {
  animation: fadeSlideIn 0.4s ease;
}

.reader-title-bar {
  text-align: center;
  margin-bottom: 1.25rem;
}

.reader-title-bar h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  margin: 0;
}

.reader-prompt {
  color: var(--ink-faint);
  margin: 0.25rem 0 0;
  font-size: 0.95rem;
  font-style: italic;
}

/* ---- Book spread ---- */
.book-spread {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.page-arrow {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--stroke-strong);
  background: var(--surface);
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-sm);
}

.page-arrow svg {
  width: 22px;
  height: 22px;
}

.page-arrow:hover:not(:disabled) {
  background: var(--teal);
  border-color: var(--teal);
  color: white;
  transform: scale(1.08);
  box-shadow: 0 4px 16px rgba(107, 197, 232, 0.3);
}

.page-arrow:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.book-page-display {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  min-height: 400px;
  animation: pageFlip 0.35s ease;
  position: relative;
}

.book-page-display::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  width: 1px;
  height: 100%;
  background: linear-gradient(to bottom, transparent, var(--stroke), transparent);
  display: none;
}

@keyframes pageFlip {
  from { opacity: 0; transform: rotateY(-8deg) scale(0.97); }
  to { opacity: 1; transform: rotateY(0deg) scale(1); }
}

.book-page-image-wrap {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(255,140,107,0.08), rgba(107,197,232,0.08));
}

.book-page-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.book-page-image-wrap img[src=""] {
  display: none;
}

.book-page-content {
  padding: 1.25rem 1.5rem 1.5rem;
}

.book-page-number {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--ink-faint);
  margin: 0 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.book-page-text {
  font-size: 1.15rem;
  line-height: 1.75;
  margin: 0;
  color: var(--ink);
  font-weight: 400;
}

/* ---- Page dots ---- */
.page-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 1rem;
  padding: 0.5rem 0;
}

.page-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid var(--stroke-strong);
  background: transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  padding: 0;
}

.page-dot:hover {
  border-color: var(--teal);
  background: rgba(107, 197, 232, 0.3);
}

.page-dot.active {
  background: var(--coral);
  border-color: var(--coral);
  transform: scale(1.25);
}

/* ---- Color palette for book cards ---- */
.book-card[data-color="coral"] .book-card-cover-placeholder { background: linear-gradient(135deg, rgba(255,140,107,0.3), rgba(255,209,102,0.2)); color: var(--coral-deep); }
.book-card[data-color="teal"] .book-card-cover-placeholder { background: linear-gradient(135deg, rgba(107,197,232,0.3), rgba(126,221,181,0.2)); color: var(--teal-deep); }
.book-card[data-color="lavender"] .book-card-cover-placeholder { background: linear-gradient(135deg, rgba(195,166,224,0.3), rgba(255,140,107,0.15)); color: var(--lavender); }
.book-card[data-color="sunshine"] .book-card-cover-placeholder { background: linear-gradient(135deg, rgba(255,209,102,0.35), rgba(255,140,107,0.15)); color: var(--sunshine-deep); }
.book-card[data-color="mint"] .book-card-cover-placeholder { background: linear-gradient(135deg, rgba(126,221,181,0.3), rgba(107,197,232,0.15)); color: var(--mint); }

/* ---- Photo uploads ---- */
.label-hint {
  font-weight: 400;
  color: var(--ink-faint);
  font-size: 0.85em;
}

.field-desc {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ink-faint);
  line-height: 1.4;
}

.photo-uploads {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.photo-entry {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: white;
  border: 2px solid var(--stroke-strong);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.65rem;
}

.photo-entry-preview {
  width: 52px;
  height: 52px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
  background: rgba(107, 197, 232, 0.1);
}

.photo-entry-fields {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.photo-entry-fields input {
  font-family: var(--font-body);
  font-size: 0.9rem;
  border: 1px solid var(--stroke);
  border-radius: 8px;
  padding: 0.35rem 0.55rem;
  background: var(--cream);
  color: var(--ink);
}

.photo-entry-fields input:focus {
  outline: none;
  border-color: var(--teal);
}

.photo-entry-remove {
  background: none;
  border: none;
  font-size: 1.2rem;
  color: var(--ink-faint);
  cursor: pointer;
  padding: 0.2rem;
  line-height: 1;
  border-radius: 50%;
  transition: color 0.15s ease;
}

.photo-entry-remove:hover {
  color: var(--coral-deep);
}

.btn-add-photo {
  background: rgba(107, 197, 232, 0.12);
  color: var(--teal-deep);
  border: 2px dashed rgba(107, 197, 232, 0.4);
  border-radius: var(--radius-sm);
  padding: 0.55rem 1rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-add-photo:hover {
  background: rgba(107, 197, 232, 0.22);
  border-color: var(--teal);
}

/* ---- Voice picker ---- */
.voice-picker {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.voice-picker label {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--ink-faint);
}

.voice-picker select {
  font-family: var(--font-body);
  font-size: 0.85rem;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--stroke-strong);
  border-radius: 8px;
  background: white;
  color: var(--ink);
  max-width: 220px;
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .app-header {
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
  }

  .logo { font-size: 1.2rem; }

  .tab-btn {
    font-size: 0.82rem;
    padding: 0.4rem 0.7rem;
  }

  .tab-icon { width: 16px; height: 16px; }

  .app-main {
    width: calc(100% - 1rem);
    margin: 1rem auto 2rem;
  }

  .create-card {
    padding: 1.25rem 1rem 1rem;
    border-radius: var(--radius-md);
  }

  .create-header h2 { font-size: 1.35rem; }

  .form-row {
    flex-direction: column;
    align-items: stretch;
  }

  .book-spread {
    gap: 0.4rem;
  }

  .page-arrow {
    width: 40px;
    height: 40px;
  }

  .page-arrow svg {
    width: 18px;
    height: 18px;
  }

  .book-page-content {
    padding: 1rem;
  }

  .book-page-text {
    font-size: 1.05rem;
  }

  .stories-shelf {
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
  }

  .book-card-cover { height: 120px; }
}

@media (max-width: 400px) {
  .stories-shelf {
    grid-template-columns: 1fr;
  }
}

/* ---- Celebration sparkles ---- */
@keyframes sparkle-burst {
  0% { transform: scale(0) rotate(0deg); opacity: 1; }
  50% { opacity: 1; }
  100% { transform: scale(1) rotate(180deg); opacity: 0; }
}

.celebration-sparkle {
  position: fixed;
  pointer-events: none;
  z-index: 1000;
  width: 12px;
  height: 12px;
  clip-path: polygon(50% 0%, 61% 35%, 98% 35%, 68% 57%, 79% 91%, 50% 70%, 21% 91%, 32% 57%, 2% 35%, 39% 35%);
  animation: sparkle-burst 0.8s ease-out forwards;
}