/* ====================================
   Diary App Website - Shared Styles
   StoryBook Theme Implementation
   ==================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Caveat:wght@400;500;600;700&family=Crimson+Text:ital,wght@0,400;0,600;0,700;1,400&family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

/* CSS Custom Properties - Theme Tokens */
:root {
  /* Colors - Light Mode */
  --color-paper: #FDFBF7;
  --color-ink: #2D2A26;
  --color-accent: #D4A373;
  --color-accent-light: #E8D5C4;
  --color-accent-dark: #B8956A;
  --color-muted: #8B7355;
  --color-shadow: rgba(45, 42, 38, 0.1);
  --color-shadow-strong: rgba(45, 42, 38, 0.15);
  
  /* Gradients */
  --gradient-accent: linear-gradient(135deg, #D4A373 0%, #E8D5C4 100%);
  --gradient-hero: linear-gradient(180deg, rgba(212, 163, 115, 0.1) 0%, transparent 50%);
  --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.8) 0%, rgba(255, 255, 255, 0.4) 100%);
  
  /* Typography */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Crimson Text', Georgia, serif;
  --font-handwriting: 'Caveat', cursive;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px var(--color-shadow);
  --shadow-md: 0 4px 16px var(--color-shadow);
  --shadow-lg: 0 8px 32px var(--color-shadow-strong);
  --shadow-glow: 0 0 20px rgba(212, 163, 115, 0.3);
}

/* Dark Mode */
[data-theme="dark"] {
  --color-paper: #1A1816;
  --color-ink: #FDFBF7;
  --color-accent: #D4A373;
  --color-accent-light: #8B7355;
  --color-accent-dark: #E8D5C4;
  --color-muted: #A89B8C;
  --color-shadow: rgba(0, 0, 0, 0.3);
  --color-shadow-strong: rgba(0, 0, 0, 0.4);
  
  --gradient-accent: linear-gradient(135deg, #D4A373 0%, #8B7355 100%);
  --gradient-hero: linear-gradient(180deg, rgba(212, 163, 115, 0.08) 0%, transparent 50%);
  --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
}

/* System preference dark mode */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-paper: #1A1816;
    --color-ink: #FDFBF7;
    --color-accent: #D4A373;
    --color-accent-light: #8B7355;
    --color-accent-dark: #E8D5C4;
    --color-muted: #A89B8C;
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-shadow-strong: rgba(0, 0, 0, 0.4);
    
    --gradient-accent: linear-gradient(135deg, #D4A373 0%, #8B7355 100%);
    --gradient-hero: linear-gradient(180deg, rgba(212, 163, 115, 0.08) 0%, transparent 50%);
    --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0.02) 100%);
  }
}

/* ====================================
   Base Styles & Reset
   ==================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--color-ink);
  background-color: var(--color-paper);
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

/* ====================================
   Typography
   ==================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--space-md);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
  margin-bottom: var(--space-md);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-dark);
}

.handwriting {
  font-family: var(--font-handwriting);
  font-size: 1.5em;
}

/* ====================================
   Layout
   ==================================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section {
  padding: var(--space-4xl) 0;
}

/* ====================================
   Header & Navigation
   ==================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-md) 0;
  background: rgba(253, 251, 247, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-shadow);
  transition: background-color var(--transition-normal);
}

[data-theme="dark"] .header,
:root:not([data-theme="light"]) .header {
  background: rgba(26, 24, 22, 0.85);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .header {
    background: rgba(26, 24, 22, 0.85);
  }
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-ink);
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon svg {
  width: 24px;
  height: 24px;
  fill: white;
}

.logo-img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  object-fit: cover;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  list-style: none;
}

.nav-links a {
  font-size: 1rem;
  color: var(--color-ink);
  opacity: 0.8;
  transition: opacity var(--transition-fast), color var(--transition-fast);
}

.nav-links a:hover {
  opacity: 1;
  color: var(--color-accent);
}

/* Theme Toggle */
.theme-toggle {
  background: transparent;
  border: 2px solid var(--color-accent-light);
  border-radius: var(--radius-full);
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-ink);
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--color-accent-light);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  fill: var(--color-accent);
}

/* ====================================
   Hero Section
   ==================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 80%, rgba(212, 163, 115, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(212, 163, 115, 0.08) 0%, transparent 40%);
  pointer-events: none;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-handwriting);
  font-size: 1.3rem;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
  animation: fadeInDown 0.8s ease forwards;
}

.hero h1 {
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.8s ease 0.2s forwards;
  opacity: 0;
}

.hero h1 .accent {
  color: var(--color-accent);
  position: relative;
}

.hero h1 .accent::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 8px;
  background: rgba(212, 163, 115, 0.3);
  border-radius: var(--radius-sm);
  z-index: -1;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--color-muted);
  margin-bottom: var(--space-xl);
  animation: fadeInUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

.hero-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.6s forwards;
  opacity: 0;
}

/* Store Buttons */
.store-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-lg);
  animation: fadeInUp 0.8s ease 0.8s forwards;
  opacity: 0;
}

.store-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-ink);
  color: var(--color-paper);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-normal);
  border: 1px solid transparent;
}

[data-theme="dark"] .store-btn {
  background: var(--color-paper);
  color: var(--color-ink);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .store-btn {
    background: var(--color-paper);
    color: var(--color-ink);
  }
}

.store-btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  color: var(--color-paper);
}

[data-theme="dark"] .store-btn:hover {
  color: var(--color-ink);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .store-btn:hover {
    color: var(--color-ink);
  }
}

.store-btn svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

.store-btn-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.2;
}

.store-btn-text small {
  font-size: 0.65rem;
  opacity: 0.8;
}

.store-btn-text span {
  font-size: 1rem;
  font-weight: 600;
}

/* Floating Animation for Hero Elements */
.floating {
  animation: floating 6s ease-in-out infinite;
}

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

/* ====================================
   Buttons
   ==================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background: var(--gradient-accent);
  color: white;
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(212, 163, 115, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--color-ink);
  border: 2px solid var(--color-accent);
}

.btn-secondary:hover {
  background: var(--color-accent);
  color: white;
  transform: translateY(-2px);
}

/* ====================================
   Features Section
   ==================================== */
.features {
  background: var(--color-paper);
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
}

.section-header .badge {
  font-family: var(--font-handwriting);
  font-size: 1.2rem;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.section-header p {
  color: var(--color-muted);
  font-size: 1.125rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.feature-card {
  background: var(--gradient-card);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(212, 163, 115, 0.2);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-accent);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-glow);
}

.feature-icon svg {
  width: 32px;
  height: 32px;
  fill: white;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.feature-card p {
  color: var(--color-muted);
  margin-bottom: 0;
}

/* ====================================
   How It Works Section
   ==================================== */
.how-it-works {
  background: linear-gradient(180deg, var(--color-paper) 0%, rgba(212, 163, 115, 0.05) 100%);
}

.steps {
  display: flex;
  gap: var(--space-xl);
  justify-content: center;
  flex-wrap: wrap;
}

.step {
  flex: 1;
  min-width: 280px;
  max-width: 350px;
  text-align: center;
  padding: var(--space-xl);
  position: relative;
}

.step-number {
  width: 60px;
  height: 60px;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: white;
  box-shadow: var(--shadow-glow);
}

.step h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-sm);
}

.step p {
  color: var(--color-muted);
  font-size: 1rem;
  margin-bottom: 0;
}

/* Connector lines between steps */
.step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 50px;
  right: -20px;
  width: 40px;
  height: 2px;
  background: var(--color-accent-light);
}

@media (max-width: 900px) {
  .step:not(:last-child)::after {
    display: none;
  }
}

/* ====================================
   CTA Section
   ==================================== */
.cta {
  background: var(--gradient-accent);
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 50%);
  animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta h2 {
  color: white;
  margin-bottom: var(--space-md);
}

.cta p {
  opacity: 0.9;
  font-size: 1.25rem;
  margin-bottom: var(--space-xl);
}

.cta .btn {
  background: white;
  color: var(--color-accent);
}

.cta .btn:hover {
  background: var(--color-paper);
}

/* ====================================
   Footer
   ==================================== */
.footer {
  background: #2D2A26;
  color: #FDFBF7;
  padding: var(--space-3xl) 0 var(--space-xl);
}

[data-theme="dark"] .footer {
  background: #0F0E0D;
  color: #FDFBF7;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .footer {
    background: #0F0E0D;
    color: #FDFBF7;
  }
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-brand {
  max-width: 300px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-paper);
  margin-bottom: var(--space-md);
}

.footer-brand p {
  color: #C5C0B8;
  font-size: 1rem;
  line-height: 1.6;
}

.footer-links h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: #FDFBF7;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  color: #C5C0B8;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: #D4A373;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(253, 251, 247, 0.1);
}

.footer-bottom p {
  color: #9A958C;
  font-size: 0.9rem;
  margin-bottom: 0;
}

.social-links {
  display: flex;
  gap: var(--space-md);
}

.social-links a {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: rgba(253, 251, 247, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background: var(--color-accent);
  transform: translateY(-3px);
}

.social-links svg {
  width: 18px;
  height: 18px;
  fill: var(--color-paper);
}

/* ====================================
   Privacy Page Specific Styles
   ==================================== */
.page-header {
  padding: calc(80px + var(--space-3xl)) 0 var(--space-3xl);
  background: var(--gradient-hero);
  text-align: center;
}

.content-section {
  padding: var(--space-3xl) 0;
}

.content-section .container {
  max-width: 800px;
}

.content-section h2 {
  font-size: 1.75rem;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  color: var(--color-accent);
}

.content-section h2:first-child {
  margin-top: 0;
}

.content-section ul {
  margin-bottom: var(--space-lg);
  padding-left: var(--space-xl);
}

.content-section li {
  margin-bottom: var(--space-sm);
  color: var(--color-muted);
}

.content-section li strong {
  color: var(--color-ink);
}

.last-updated {
  font-style: italic;
  color: var(--color-muted);
  margin-bottom: var(--space-xl);
}

/* ====================================
   Animations
   ==================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scroll Animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delay for children */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }

/* ====================================
   Responsive Styles
   ==================================== */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero-content {
    padding: 0 var(--space-md);
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 280px;
  }
  
  .section {
    padding: var(--space-3xl) 0;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-brand {
    max-width: 100%;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  .container {
    padding: 0 var(--space-md);
  }
}