/* ======================================================
   GiftSong Landing Page Styles
   Design: "The Lyrical Keepsake" — warm, premium, editorial
   ====================================================== */

:root {
  --surface:                 #FBF5F1;
  --surface-container-low:   #F6F0EB;
  --surface-container-lowest:#FFFFFF;
  --surface-container-high:  #EDE7E2;
  --on-surface:              #302E2C;
  --on-surface-variant:      #6B6560;
  --primary:                 #AA2C32;
  --primary-container:       #FF7574;
  --primary-gradient:        linear-gradient(135deg, #AA2C32, #FF7574);
  --max-width: 1120px;
  --radius-sm: 4px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; scroll-behavior: smooth; }
body {
  font-family: 'Be Vietnam Pro', system-ui, sans-serif;
  color: var(--on-surface);
  background: var(--surface);
  overflow-x: hidden;
}

/* ==============================
   Navigation
   ============================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(251, 245, 241, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: box-shadow 0.3s;
}

.nav.is-scrolled {
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 20px;
  color: var(--primary);
  text-decoration: none;
  margin-right: auto;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo-img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

.nav-tabs {
  display: flex;
  gap: 4px;
}

.nav-tab {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 500;
  font-size: 14px;
  color: var(--on-surface-variant);
  background: none;
  border: none;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.2s;
}

.nav-tab:hover {
  color: var(--on-surface);
  background: rgba(170, 44, 50, 0.06);
}

.nav-tab.is-active {
  color: var(--primary);
  background: rgba(170, 44, 50, 0.1);
  font-weight: 600;
}

.nav-cta {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 14px;
  color: #fff;
  background: var(--primary-gradient);
  padding: 8px 20px;
  border-radius: var(--radius-full);
  text-decoration: none;
  margin-left: 12px;
  flex-shrink: 0;
  transition: transform 0.15s, box-shadow 0.15s;
}

.nav-cta:hover { transform: scale(1.03); box-shadow: 0 4px 16px rgba(170, 44, 50, 0.25); }

/* Hamburger — mobile only */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--on-surface);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.nav-hamburger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.is-open span:nth-child(2) { opacity: 0; }
.nav-hamburger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-mobile {
  display: flex;
  flex-direction: column;
  padding: 8px 24px 16px;
  gap: 4px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.nav-mobile .nav-tab {
  text-align: left;
  padding: 12px 16px;
  font-size: 16px;
}

.nav-mobile .nav-cta {
  margin: 8px 0 0;
  text-align: center;
}

@media (max-width: 768px) {
  .nav-tabs { display: none; }
  .nav-cta:not(.nav-mobile .nav-cta) { display: none; }
  .nav-hamburger { display: flex; }
}

/* ==============================
   Main / Tab Panels
   ============================== */
.main {
  margin-top: 64px;
  min-height: calc(100dvh - 64px);
}

.tab-panel {
  display: none;
  animation: fadeIn 0.4s ease;
}

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

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

/* Section headers */
.section-header {
  text-align: center;
  padding: 56px 24px 32px;
  max-width: 600px;
  margin: 0 auto;
}

.section-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 800;
  font-size: 36px;
  color: var(--on-surface);
  margin-bottom: 12px;
}

.section-sub {
  font-size: 16px;
  color: var(--on-surface-variant);
  line-height: 1.6;
  font-weight: 300;
}

/* ==============================
   Hero (Home tab)
   ============================== */
.hero {
  text-align: center;
  padding: 80px 24px 48px;
  max-width: 720px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 13px;
  color: var(--primary);
  background: rgba(170, 44, 50, 0.08);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

.hero-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 800;
  font-size: 52px;
  line-height: 1.1;
  color: var(--on-surface);
  margin-bottom: 20px;
}

.hero-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: 18px;
  line-height: 1.6;
  color: var(--on-surface-variant);
  font-weight: 300;
  max-width: 540px;
  margin: 0 auto 32px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

@media (max-width: 600px) {
  .hero { padding: 48px 20px 32px; }
  .hero-title { font-size: 36px; }
  .hero-sub { font-size: 16px; }
}

/* ==============================
   Buttons
   ============================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 16px;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s, box-shadow 0.15s;
}

.btn:hover { transform: scale(1.03); }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--primary-gradient);
  color: #fff;
  box-shadow: 0 8px 24px -2px rgba(170, 44, 50, 0.3);
}

.btn-primary:hover { box-shadow: 0 12px 28px -2px rgba(170, 44, 50, 0.4); }

.btn-secondary {
  background: var(--surface-container-lowest);
  color: var(--primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.btn-secondary:hover { box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1); }

/* ==============================
   Features (Home tab)
   ============================== */
.features {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--surface-container-lowest);
  border-radius: var(--radius-xl);
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.feature-icon {
  font-size: 40px;
  margin-bottom: 16px;
}

.feature-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 8px;
}

.feature-desc {
  font-size: 14px;
  color: var(--on-surface-variant);
  line-height: 1.6;
  font-weight: 300;
}

@media (max-width: 768px) {
  .features-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
}

/* ==============================
   Social Proof (Home tab)
   ============================== */
.social-proof {
  text-align: center;
  padding: 48px 24px 72px;
  background: var(--surface-container-low);
}

.proof-text {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 24px;
  font-style: italic;
  color: var(--on-surface);
  margin-bottom: 24px;
}

.proof-scenes {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  font-size: 32px;
  margin-bottom: 16px;
}

.proof-sub {
  font-size: 15px;
  color: var(--on-surface-variant);
  font-weight: 300;
}

/* ==============================
   Templates Tab
   ============================== */
.template-filters {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  padding: 0 24px 32px;
}

.filter-btn {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 500;
  font-size: 13px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  border: 1.5px solid var(--surface-container-high);
  background: var(--surface-container-lowest);
  color: var(--on-surface-variant);
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.filter-btn.is-active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.template-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 64px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 20px;
}

.template-card {
  background: var(--surface-container-lowest);
  border-radius: var(--radius-xl);
  padding: 0;
  border: none;
  cursor: pointer;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  transition: transform 0.2s, box-shadow 0.2s;
  text-align: center;
}

.template-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
}

.template-art {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--card-accent-light), var(--card-accent));
  position: relative;
}

.template-art::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.25) 0%, transparent 60%);
}

.template-emoji {
  font-size: 52px;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.15));
  z-index: 1;
  position: relative;
}

.template-label {
  padding: 14px 12px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 14px;
  color: var(--on-surface);
}

@media (max-width: 600px) {
  .template-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; padding: 0 16px 48px; }
  .template-emoji { font-size: 40px; }
  .template-label { padding: 10px 8px; font-size: 13px; }
}

/* ==============================
   Preview Modal
   ============================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(48, 46, 44, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fadeIn 0.3s ease;
}

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

.modal {
  background: var(--surface-container-lowest);
  border-radius: var(--radius-xl);
  max-width: 860px;
  width: 100%;
  max-height: 92dvh;
  overflow-y: auto;
  display: flex;
  gap: 0;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: rgba(0, 0, 0, 0.06);
  color: var(--on-surface);
  font-size: 20px;
  cursor: pointer;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.modal-close:hover { background: rgba(0, 0, 0, 0.12); }

/* Phone preview */
.modal-phone {
  flex: 0 0 340px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.phone-notch {
  width: 100px;
  height: 6px;
  border-radius: 3px;
  background: var(--surface-container-high);
  margin-bottom: 8px;
}

.phone-screen {
  width: 300px;
  height: 600px;
  border-radius: 32px;
  overflow: hidden;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
  border: 3px solid var(--surface-container-high);
}

/* Phone screen inner preview elements */
.preview-bg {
  position: absolute;
  inset: 0;
}

.preview-content {
  position: relative;
  z-index: 1;
  padding: 28px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.preview-badge {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 11px;
  color: #fff;
  padding: 5px 14px;
  border-radius: 20px;
}

.preview-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 18px;
  color: var(--on-surface);
  text-align: center;
}

.preview-sub {
  font-size: 11px;
  color: var(--on-surface-variant);
  text-align: center;
}

.preview-player {
  width: 100%;
  background: var(--surface-container-lowest);
  border-radius: 16px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.preview-album {
  width: 100%;
  aspect-ratio: 1.2;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-album-emoji { font-size: 48px; }

.preview-album-lyrics {
  font-size: 9px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.85);
  text-align: center;
  padding: 8px 10px;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
  overflow: hidden;
}

.preview-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-bottom: 2px;
}

.preview-brand-logo {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  filter: hue-rotate(var(--preview-hue-shift, 0deg));
}

.preview-brand-name {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 11px;
  color: var(--preview-accent, #AA2C32);
}

.preview-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 7px 14px;
  border-radius: 20px;
  color: #fff;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 9px;
}

.preview-cta-sub {
  font-size: 7px;
  color: var(--on-surface-variant);
  text-align: center;
}

.preview-footer {
  font-size: 7px;
  color: var(--on-surface-variant);
  opacity: 0.5;
  text-align: center;
  margin-top: auto;
  padding-top: 4px;
}

.preview-progress {
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--surface-container-high);
}

.preview-progress-fill {
  height: 100%;
  border-radius: 2px;
}

.preview-play {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  padding-left: 2px;
}

.preview-lyrics {
  width: 100%;
  background: var(--surface-container-lowest);
  border-radius: 16px;
  padding: 14px;
}

.preview-lyrics-header {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 12px;
  margin-bottom: 8px;
}

.preview-lyrics-body {
  font-size: 11px;
  line-height: 1.7;
  color: var(--on-surface);
  opacity: 0.75;
}

/* Modal info panel */
.modal-info {
  flex: 1;
  padding: 40px 32px 32px 8px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 16px;
}

.modal-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 24px;
}

.modal-desc {
  font-size: 15px;
  line-height: 1.6;
  color: var(--on-surface-variant);
  font-weight: 300;
}

.modal-cta {
  align-self: flex-start;
}

@media (max-width: 600px) {
  .modal {
    flex-direction: column;
    max-height: 95dvh;
  }
  .modal-phone {
    flex: none;
    padding: 20px 16px 0;
  }
  .phone-screen { width: 260px; height: 520px; }
  .modal-info { padding: 20px 24px 24px; }
  .modal-title { font-size: 20px; }
}

/* ==============================
   How It Works Tab
   ============================== */
.steps {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 40px;
  display: flex;
  align-items: flex-start;
  gap: 24px;
}

.step {
  flex: 1;
  background: var(--surface-container-lowest);
  border-radius: var(--radius-xl);
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  position: relative;
}

.step-num {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-gradient);
  color: #fff;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-icon { font-size: 40px; margin-bottom: 16px; }

.step-title {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 18px;
  margin-bottom: 10px;
}

.step-desc {
  font-size: 14px;
  color: var(--on-surface-variant);
  line-height: 1.6;
  font-weight: 300;
}

.step-arrow {
  font-size: 24px;
  color: var(--on-surface-variant);
  opacity: 0.4;
  margin-top: 80px;
  flex-shrink: 0;
}

.how-cta {
  text-align: center;
  padding: 32px 24px 72px;
}

.how-cta-sub {
  margin-top: 12px;
  font-size: 14px;
  color: var(--on-surface-variant);
  font-weight: 300;
}

@media (max-width: 768px) {
  .steps { flex-direction: column; max-width: 400px; }
  .step-arrow { display: none; }
}

/* ==============================
   Pricing Tab
   ============================== */
.pricing-grid {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 72px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}

.price-card {
  background: var(--surface-container-lowest);
  border-radius: var(--radius-xl);
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  position: relative;
  transition: transform 0.2s;
}

.price-card:hover { transform: translateY(-4px); }

.price-card.is-featured {
  border: 2px solid var(--primary);
  box-shadow: 0 8px 32px rgba(170, 44, 50, 0.12);
  padding-top: 44px;
}

.price-popular {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary-gradient);
  color: #fff;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 12px;
  padding: 4px 16px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.price-badge {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 600;
  font-size: 14px;
  color: var(--on-surface-variant);
  margin-bottom: 8px;
}

.price-amount {
  margin-bottom: 20px;
}

.price-dollar {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 800;
  font-size: 40px;
  color: var(--on-surface);
}

.price-period {
  font-size: 15px;
  color: var(--on-surface-variant);
  font-weight: 400;
}

.price-features {
  list-style: none;
  text-align: left;
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.price-features li {
  font-size: 14px;
  color: var(--on-surface-variant);
  padding-left: 24px;
  position: relative;
  line-height: 1.4;
}

.price-features li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 700;
}

.price-btn { width: 100%; }

.price-save {
  margin-top: 10px;
  font-size: 12px;
  color: var(--primary);
  font-weight: 500;
}

@media (max-width: 768px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 380px;
  }
}

/* ==============================
   Footer
   ============================== */
.footer {
  background: var(--surface-container-low);
  padding: 32px 24px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.footer-brand {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 18px;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-logo-img {
  width: 24px;
  height: 24px;
  border-radius: 5px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 13px;
  color: var(--on-surface-variant);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--primary); }

.footer-copy {
  font-size: 12px;
  color: var(--on-surface-variant);
  opacity: 0.6;
}

/* ==============================
   Utility
   ============================== */
[hidden] { display: none !important; }