/* ===================================
   AI For Dummie - Styles
   Playful, approachable, friendly
   =================================== */

/* CSS Custom Properties */
:root {
  /* Colors */
  --color-primary: #FF6B4A;
  --color-primary-dark: #E5553A;
  --color-primary-light: #FF8A70;
  --color-secondary: #8B7EC8;
  --color-secondary-dark: #7468B0;
  --color-secondary-light: #A89DD8;
  --color-background: #FBF8F4;
  --color-surface: #FFFFFF;
  --color-text: #2D2D2D;
  --color-text-muted: #6B6B6B;
  --color-text-light: #9B9B9B;
  --color-border: #E8E4DE;
  --color-success: #4CAF50;
  --color-error: #E74C3C;
  
  /* Typography */
  --font-display: 'Nunito', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(45, 45, 45, 0.08);
  --shadow-md: 0 4px 16px rgba(45, 45, 45, 0.1);
  --shadow-lg: 0 8px 32px rgba(45, 45, 45, 0.12);
  --shadow-glow: 0 0 40px rgba(255, 107, 74, 0.2);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul, ol {
  list-style: none;
}

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

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 1.2;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

.btn-small {
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.875rem;
}

.btn-large {
  padding: var(--space-lg) var(--space-2xl);
  font-size: 1.125rem;
}

/* Form Elements */
.input-email {
  padding: var(--space-md) var(--space-lg);
  font-size: 1rem;
  font-family: var(--font-body);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
}

.input-email:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(255, 107, 74, 0.15);
}

.input-email::placeholder {
  color: var(--color-text-light);
}

/* ===================================
   Header
   =================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(251, 248, 244, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
}

.logo-icon {
  font-size: 1.5rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav a {
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

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

.nav .btn {
  color: white;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
  padding: var(--space-3xl) 0 var(--space-4xl);
  overflow: hidden;
}

.hero .container {
  display: grid;
  gap: var(--space-2xl);
  align-items: center;
}

.hero-eyebrow {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-secondary-dark);
  margin-bottom: var(--space-md);
}

.hero-title {
  font-size: clamp(2rem, 6vw, 3.5rem);
  color: var(--color-text);
  margin-bottom: var(--space-lg);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  max-width: 500px;
  margin-bottom: var(--space-xl);
}

.emoji-pop {
  display: inline-block;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

.subscribe-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 450px;
}

.form-note {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 300px;
}

.hero-illustration {
  position: relative;
  width: 200px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.illustration-blob {
  position: absolute;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary-light));
  border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
  animation: blob 8s ease-in-out infinite;
}

@keyframes blob {
  0%, 100% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; }
  50% { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; }
}

.illustration-emoji {
  position: relative;
  font-size: 5rem;
  z-index: 1;
  animation: float 3s ease-in-out infinite;
}

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

.floating-card {
  position: absolute;
  font-size: 2rem;
  padding: var(--space-md);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  animation: float 4s ease-in-out infinite;
}

.card-1 {
  top: 10%;
  left: 10%;
  animation-delay: 0s;
}

.card-2 {
  top: 20%;
  right: 15%;
  animation-delay: 1s;
}

.card-3 {
  bottom: 20%;
  left: 20%;
  animation-delay: 2s;
}

/* ===================================
   Section Common Styles
   =================================== */
.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-tag {
  display: inline-block;
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-secondary-light);
  color: var(--color-secondary-dark);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  margin-bottom: var(--space-sm);
}

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

/* ===================================
   Featured Product
   =================================== */
.featured {
  padding: var(--space-4xl) 0;
  background: var(--color-surface);
}

.featured-product {
  position: relative;
  background: var(--color-background);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  box-shadow: var(--shadow-lg);
  border: 2px solid var(--color-border);
}

.product-badge {
  position: absolute;
  top: -12px;
  left: var(--space-xl);
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-primary);
  color: white;
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: var(--radius-full);
}

.product-content {
  display: grid;
  gap: var(--space-xl);
}

.product-title {
  font-size: 1.75rem;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.product-description {
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  font-size: 1.0625rem;
  line-height: 1.7;
}

.product-features {
  display: grid;
  gap: var(--space-sm);
}

.product-features li {
  font-size: 1rem;
  color: var(--color-text);
}

.product-cta {
  text-align: center;
  padding: var(--space-xl);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
}

.price {
  margin-bottom: var(--space-lg);
}

.price-original {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-light);
  text-decoration: line-through;
  margin-right: var(--space-sm);
}

.price-current {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  color: var(--color-primary);
}

.price-note {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-top: var(--space-xs);
}

.guarantee {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-top: var(--space-md);
}

/* ===================================
   What You'll Learn / Course Section
   =================================== */
.what-youll-learn {
  padding: var(--space-4xl) 0;
  background: var(--color-surface);
}

.course-grid {
  display: grid;
  gap: var(--space-md);
  margin-bottom: var(--space-2xl);
}

.course-day {
  background: var(--color-background);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  border-left: 4px solid var(--color-primary);
  transition: all var(--transition-normal);
}

.course-day:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

.day-number {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.course-day h3 {
  font-size: 1.125rem;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.course-day p {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.course-cta {
  max-width: 500px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .course-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .course-day:nth-child(7) {
    grid-column: span 2;
    max-width: 50%;
    margin: 0 auto;
  }
}

@media (min-width: 1024px) {
  .course-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .course-day:nth-child(5),
  .course-day:nth-child(6),
  .course-day:nth-child(7) {
    grid-column: span 1;
    max-width: 100%;
  }
}

/* ===================================
   Social Proof Section
   =================================== */
.social-proof {
  padding: var(--space-2xl) 0;
  background: var(--color-background);
  text-align: center;
}

.proof-text p {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  font-style: italic;
  margin-bottom: var(--space-sm);
}

.proof-note {
  font-size: 0.875rem !important;
  font-weight: 400 !important;
  font-style: normal !important;
  color: var(--color-text-muted) !important;
}

/* ===================================
   Coming Soon
   =================================== */
.coming-soon {
  padding: var(--space-4xl) 0;
}

.teaser-grid {
  display: grid;
  gap: var(--space-lg);
}

.teaser-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 2px solid var(--color-border);
  transition: all var(--transition-normal);
}

.teaser-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-secondary-light);
}

.teaser-emoji {
  font-size: 2.5rem;
  margin-bottom: var(--space-md);
}

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

.teaser-description {
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}

.teaser-status {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-secondary-light);
  color: var(--color-secondary-dark);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===================================
   About Section
   =================================== */
.about {
  padding: var(--space-4xl) 0;
  background: linear-gradient(135deg, var(--color-secondary-light) 0%, var(--color-primary-light) 100%);
}

.about-content {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  background: var(--color-surface);
  padding: var(--space-2xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.about-emoji {
  font-size: 3rem;
  margin-bottom: var(--space-md);
}

.about-title {
  font-size: 1.75rem;
  margin-bottom: var(--space-lg);
}

.about-text {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  line-height: 1.8;
}

.about-text:last-child {
  margin-bottom: 0;
}

.about-text strong {
  color: var(--color-text);
}

/* ===================================
   Footer
   =================================== */
.footer {
  padding: var(--space-4xl) 0 var(--space-xl);
  background: var(--color-text);
  color: white;
}

.footer-newsletter {
  text-align: center;
  max-width: 500px;
  margin: 0 auto var(--space-3xl);
}

.footer-title {
  font-size: 1.75rem;
  margin-bottom: var(--space-sm);
}

.footer-subtitle {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--space-xl);
}

.footer-form .input-email {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: white;
}

.footer-form .input-email::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.footer-form .input-email:focus {
  border-color: var(--color-primary);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-xl) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-display);
  font-weight: 700;
}

.footer-links {
  display: flex;
  gap: var(--space-xl);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast);
}

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

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

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--color-primary);
  transform: translateY(-2px);
}

.copyright {
  text-align: center;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.5);
  margin-top: var(--space-xl);
}

/* ===================================
   Toast Notification
   =================================== */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: var(--space-md) var(--space-xl);
  background: var(--color-text);
  color: white;
  border-radius: var(--radius-full);
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transition: all var(--transition-normal);
  z-index: 1000;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast.success {
  background: var(--color-success);
}

.toast.error {
  background: var(--color-error);
}

/* ===================================
   Responsive - Tablet
   =================================== */
@media (min-width: 768px) {
  .subscribe-form {
    flex-direction: row;
  }
  
  .subscribe-form .input-email {
    flex: 1;
  }
  
  .hero .container {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
  }
  
  .hero-visual {
    min-height: 400px;
  }
  
  .hero-illustration {
    width: 280px;
    height: 280px;
  }
  
  .illustration-emoji {
    font-size: 7rem;
  }
  
  .product-content {
    grid-template-columns: 1.5fr 1fr;
    align-items: center;
  }
  
  .teaser-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* ===================================
   Responsive - Desktop
   =================================== */
@media (min-width: 1024px) {
  .featured-product {
    padding: var(--space-2xl);
  }
  
  .product-cta {
    padding: var(--space-2xl);
  }
  
  .about-content {
    padding: var(--space-3xl);
  }
}

/* ===================================
   Reduced Motion
   =================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}