/* ============================================================
   SimplySolvd Design System
   A premium digital product storefront for ebooks & guides
   Categories: Money (#10b981), AI (#6366f1), Skincare (#ec4899)
   ============================================================ */

/* ----------------------------------------------------------
   CSS Custom Properties
   ---------------------------------------------------------- */
:root {
  /* Brand */
  --color-primary: #6366f1;
  --color-primary-hover: #4f46e5;
  --color-primary-light: #e0e7ff;
  --color-primary-dark: #4338ca;

  /* Category accents */
  --color-money: #10b981;
  --color-money-hover: #059669;
  --color-money-light: #d1fae5;
  --color-money-dark: #047857;

  --color-ai: #6366f1;
  --color-ai-hover: #4f46e5;
  --color-ai-light: #e0e7ff;
  --color-ai-dark: #4338ca;

  --color-skincare: #ec4899;
  --color-skincare-hover: #db2777;
  --color-skincare-light: #fce7f3;
  --color-skincare-dark: #be185d;

  /* Neutrals */
  --color-text-primary: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-light: #94a3b8;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-border: #e2e8f0;
  --color-dark: #0f172a;
  --color-dark-mid: #1e1b4b;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Spacing (8px grid) */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 2.5rem;
  --space-6: 3rem;
  --space-8: 4rem;
  --space-10: 5rem;
  --space-12: 6rem;
  --space-16: 8rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

  /* Radii */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Layout */
  --header-height: 72px;
  --container-max: 1200px;
  --container-reading: 720px;
}


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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}

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

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.2;
  font-weight: 700;
  color: var(--color-text-primary);
}


/* ----------------------------------------------------------
   2. Navigation
   ---------------------------------------------------------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-3);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.025em;
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.logo span {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-links a {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-base);
  position: relative;
  padding: var(--space-1) 0;
}

.nav-links a:hover {
  color: #ffffff;
}

.nav-links a.active {
  color: #ffffff;
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

.nav-links a.active-money::after {
  background: var(--color-money);
}

.nav-links a.active-ai::after {
  background: var(--color-ai);
}

.nav-links a.active-skincare::after {
  background: var(--color-skincare);
}

/* Hamburger button */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: #ffffff;
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* Mobile nav */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-dark);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--space-4) var(--space-3);
    gap: 0;
    transform: translateX(100%);
    transition: transform var(--transition-slow);
  }

  .nav-links a {
    font-size: var(--font-size-lg);
    padding: var(--space-2) 0;
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .nav-links a.active::after {
    bottom: -1px;
    height: 2px;
  }

  body.nav-open .nav-links {
    transform: translateX(0);
  }

  body.nav-open .hamburger span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  body.nav-open .hamburger span:nth-child(2) {
    opacity: 0;
  }

  body.nav-open .hamburger span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  body.nav-open {
    overflow: hidden;
  }
}


/* ----------------------------------------------------------
   3. Hero Sections
   ---------------------------------------------------------- */

/* Homepage hero — large, centered, gradient */
.hero {
  padding: var(--space-16) var(--space-3) var(--space-12);
  margin-top: var(--header-height);
  text-align: center;
  background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-dark-mid) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -25%;
  width: 150%;
  height: 200%;
  background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
}

.hero h1 {
  font-size: var(--font-size-5xl);
  color: #ffffff;
  margin-bottom: var(--space-3);
  letter-spacing: -0.03em;
  font-weight: 800;
}

.hero p {
  font-size: var(--font-size-xl);
  color: var(--color-text-light);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.hero .btn {
  margin-top: var(--space-2);
}

/* Category heroes — smaller, with category-specific gradients */
.hero-category {
  padding: var(--space-10) var(--space-3) var(--space-8);
  margin-top: var(--header-height);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-category::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -25%;
  width: 150%;
  height: 200%;
  pointer-events: none;
}

.hero-category h1 {
  font-size: var(--font-size-4xl);
  color: #ffffff;
  margin-bottom: var(--space-2);
  letter-spacing: -0.025em;
  position: relative;
  z-index: 1;
}

.hero-category p {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.7);
  max-width: 560px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  line-height: 1.7;
}

.hero-money {
  background: linear-gradient(135deg, #064e3b 0%, #0f172a 60%, #0f172a 100%);
}

.hero-money::before {
  background: radial-gradient(ellipse at 30% 50%, rgba(16, 185, 129, 0.12) 0%, transparent 60%);
}

.hero-ai {
  background: linear-gradient(135deg, #312e81 0%, #0f172a 60%, #0f172a 100%);
}

.hero-ai::before {
  background: radial-gradient(ellipse at 30% 50%, rgba(99, 102, 241, 0.12) 0%, transparent 60%);
}

.hero-skincare {
  background: linear-gradient(135deg, #831843 0%, #0f172a 60%, #0f172a 100%);
}

.hero-skincare::before {
  background: radial-gradient(ellipse at 30% 50%, rgba(236, 72, 153, 0.12) 0%, transparent 60%);
}

@media (max-width: 768px) {
  .hero {
    padding: var(--space-10) var(--space-3) var(--space-8);
  }

  .hero h1 {
    font-size: var(--font-size-3xl);
  }

  .hero p {
    font-size: var(--font-size-base);
  }

  .hero-category {
    padding: var(--space-8) var(--space-3) var(--space-6);
  }

  .hero-category h1 {
    font-size: var(--font-size-2xl);
  }

  .hero-category p {
    font-size: var(--font-size-base);
  }
}


/* ----------------------------------------------------------
   4. Container
   ---------------------------------------------------------- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-3);
}


/* ----------------------------------------------------------
   5. Product Grid + Cards
   ---------------------------------------------------------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  padding: var(--space-8) 0;
}

@media (max-width: 1024px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .product-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}

.product-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.product-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-border) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-image-money {
  background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
}

.product-image-ai {
  background: linear-gradient(135deg, #e0e7ff 0%, #c7d2fe 100%);
}

.product-image-skincare {
  background: linear-gradient(135deg, #fce7f3 0%, #fbcfe8 100%);
}

.product-info {
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.product-info h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-1);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.product-info p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
  margin-bottom: var(--space-3);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.product-price {
  font-size: var(--font-size-2xl);
  font-weight: 800;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.product-price .original-price {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-light);
  text-decoration: line-through;
  margin-left: var(--space-1);
}


/* ----------------------------------------------------------
   6. Category Intro Section
   ---------------------------------------------------------- */
.category-intro {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
  padding: var(--space-8) var(--space-3) var(--space-4);
}

.category-intro h2 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-2);
  letter-spacing: -0.025em;
}

.category-intro p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: 1.8;
}

@media (max-width: 768px) {
  .category-intro {
    padding: var(--space-6) var(--space-3) var(--space-3);
  }

  .category-intro h2 {
    font-size: var(--font-size-2xl);
  }

  .category-intro p {
    font-size: var(--font-size-base);
  }
}


/* ----------------------------------------------------------
   7. Blog Grid + Cards
   ---------------------------------------------------------- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  padding: var(--space-6) 0;
}

@media (max-width: 768px) {
  .blog-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}

.blog-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.blog-card-image {
  width: 100%;
  height: 180px;
  background: var(--color-bg-alt);
  overflow: hidden;
}

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

.blog-card-body {
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-2);
}

.blog-card-body h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: var(--space-1);
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.blog-card-body h3 a {
  transition: color var(--transition-fast);
}

.blog-card-body h3 a:hover {
  color: var(--color-primary);
}

.blog-card-excerpt {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
  margin-bottom: var(--space-2);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.blog-card-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-light);
  font-weight: 500;
}

/* Category badges */
.category-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.badge-money {
  background: var(--color-money-light);
  color: var(--color-money-dark);
}

.badge-ai {
  background: var(--color-ai-light);
  color: var(--color-ai-dark);
}

.badge-skincare {
  background: var(--color-skincare-light);
  color: var(--color-skincare-dark);
}


/* ----------------------------------------------------------
   8. Product Detail Layout
   ---------------------------------------------------------- */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  padding: var(--space-8) 0;
  margin-top: var(--header-height);
  align-items: start;
}

@media (max-width: 768px) {
  .product-detail {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    padding: var(--space-4) 0;
  }
}

.product-detail-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-border) 100%);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-detail-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.product-detail-info .category-badge {
  align-self: flex-start;
}

.product-detail-info h1 {
  font-size: var(--font-size-3xl);
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.product-detail-info .product-description {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.product-detail-info .product-price {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  margin: var(--space-1) 0;
}

.product-detail-features {
  list-style: none;
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.product-detail-features li {
  padding: var(--space-1) 0;
  padding-left: var(--space-3);
  position: relative;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

.product-detail-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.7;
}

.product-detail-features li.feature-money::before {
  background: var(--color-money);
}

.product-detail-features li.feature-ai::before {
  background: var(--color-ai);
}

.product-detail-features li.feature-skincare::before {
  background: var(--color-skincare);
}

@media (max-width: 768px) {
  .product-detail-info h1 {
    font-size: var(--font-size-2xl);
  }

  .product-detail-info .product-price {
    font-size: var(--font-size-2xl);
  }
}


/* ----------------------------------------------------------
   9. Blog Article Layout
   ---------------------------------------------------------- */
.article-container {
  max-width: var(--container-reading);
  margin: 0 auto;
  padding: var(--space-4) var(--space-3) var(--space-12);
  margin-top: var(--header-height);
}

.article-header {
  text-align: center;
  padding: var(--space-8) 0 var(--space-6);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-6);
}

.article-header .category-badge {
  margin-bottom: var(--space-3);
}

.article-header h1 {
  font-size: var(--font-size-4xl);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-3);
  line-height: 1.15;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

.article-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-meta .separator {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-text-light);
}

/* Article content typography */
.article-content {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  color: var(--color-text-primary);
}

.article-content h2 {
  font-size: var(--font-size-2xl);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.article-content h3 {
  font-size: var(--font-size-xl);
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}

.article-content p {
  margin-bottom: var(--space-3);
}

.article-content strong {
  font-weight: 700;
  color: var(--color-text-primary);
}

.article-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-color: rgba(99, 102, 241, 0.3);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition-fast);
}

.article-content a:hover {
  text-decoration-color: var(--color-primary);
}

.article-content ul,
.article-content ol {
  margin-bottom: var(--space-3);
  padding-left: var(--space-4);
}

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

.article-content li {
  margin-bottom: var(--space-1);
  padding-left: var(--space-1);
}

.article-content blockquote {
  margin: var(--space-4) 0;
  padding: var(--space-3) var(--space-4);
  border-left: 4px solid var(--color-primary);
  background: var(--color-bg-alt);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--color-text-secondary);
}

.article-content blockquote p:last-child {
  margin-bottom: 0;
}

.article-content img {
  border-radius: var(--radius-md);
  margin: var(--space-4) 0;
}

@media (max-width: 768px) {
  .article-header h1 {
    font-size: var(--font-size-2xl);
  }

  .article-content {
    font-size: var(--font-size-base);
  }

  .article-content h2 {
    font-size: var(--font-size-xl);
  }

  .article-content h3 {
    font-size: var(--font-size-lg);
  }
}


/* ----------------------------------------------------------
   10. Checkout Modal
   ---------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-3);
}

.modal-overlay.active {
  display: flex;
  animation: fadeIn var(--transition-slow) ease;
}

.modal {
  background: var(--color-bg);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-xl);
  animation: slideUp var(--transition-slow) ease;
}

.modal-header {
  padding: var(--space-4) var(--space-4) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-header h2 {
  font-size: var(--font-size-xl);
  letter-spacing: -0.01em;
}

.modal-close {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  transition: background var(--transition-fast), color var(--transition-fast);
  flex-shrink: 0;
  font-size: var(--font-size-xl);
  line-height: 1;
}

.modal-close:hover {
  background: var(--color-bg-alt);
  color: var(--color-text-primary);
}

.modal-body {
  padding: var(--space-4);
}

.checkout-summary {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.checkout-summary-image {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-sm);
  background: var(--color-border);
  flex-shrink: 0;
  overflow: hidden;
}

.checkout-summary-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.checkout-summary-details {
  flex: 1;
  min-width: 0;
}

.checkout-summary-details h4 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.checkout-summary-details .price {
  font-size: var(--font-size-lg);
  font-weight: 800;
  color: var(--color-text-primary);
}

.checkout-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-primary);
}

.form-group input {
  height: 48px;
  padding: 0 var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  color: var(--color-text-primary);
  background: var(--color-bg);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

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

.form-group input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group input.error {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-error {
  font-size: var(--font-size-xs);
  color: #ef4444;
  font-weight: 500;
}

/* Checkout processing spinner state */
.checkout-processing {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  text-align: center;
  gap: var(--space-3);
}

.checkout-processing .spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.checkout-processing p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

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


/* ----------------------------------------------------------
   11. Buttons
   ---------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 12px 24px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast),
    transform var(--transition-fast), box-shadow var(--transition-fast);
  border: none;
  text-align: center;
  line-height: 1.2;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Primary */
.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
  box-shadow: none;
}

/* Buy */
.btn-buy {
  background: var(--color-primary);
  color: #ffffff;
  padding: 14px 28px;
  font-size: var(--font-size-base);
  font-weight: 700;
  border-radius: var(--radius-md);
  width: 100%;
}

.btn-buy:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.btn-buy:active {
  transform: translateY(0) scale(0.98);
  box-shadow: none;
}

.btn-buy::after {
  content: '\2192';
  margin-left: 6px;
  transition: transform var(--transition-fast);
}

.btn-buy:hover::after {
  transform: translateX(3px);
}

.btn-buy-money {
  background: var(--color-money);
}

.btn-buy-money:hover {
  background: var(--color-money-hover);
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
}

.btn-buy-ai {
  background: var(--color-ai);
}

.btn-buy-ai:hover {
  background: var(--color-ai-hover);
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.3);
}

.btn-buy-skincare {
  background: var(--color-skincare);
}

.btn-buy-skincare:hover {
  background: var(--color-skincare-hover);
  box-shadow: 0 4px 16px rgba(236, 72, 153, 0.3);
}

@media (min-width: 769px) {
  .btn-buy {
    width: auto;
  }
}

/* Outline */
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.btn-outline:active {
  transform: translateY(0) scale(0.98);
  box-shadow: none;
}

/* Secondary / Ghost */
.btn-secondary {
  background: var(--color-bg-alt);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-border);
  transform: translateY(-1px);
}

/* Size variants */
.btn-lg {
  padding: 16px 32px;
  font-size: var(--font-size-base);
}

.btn-sm {
  padding: 8px 16px;
  font-size: var(--font-size-xs);
}


/* ----------------------------------------------------------
   12. Footer
   ---------------------------------------------------------- */
.footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-12) 0 0;
}

.footer-grid {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-3);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-8);
}

.footer-brand h3 {
  font-size: var(--font-size-xl);
  color: #ffffff;
  margin-bottom: var(--space-2);
  font-weight: 800;
}

.footer-brand h3 span {
  color: var(--color-primary);
}

.footer-brand p {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  font-size: var(--font-size-sm);
  color: #ffffff;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-3);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col a {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition-fast);
}

.footer-col a:hover {
  color: #ffffff;
}

.footer-bottom {
  max-width: var(--container-max);
  margin: var(--space-8) auto 0;
  padding: var(--space-4) var(--space-3);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: rgba(255, 255, 255, 0.35);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.35);
  transition: color var(--transition-fast);
}

.footer-bottom a:hover {
  color: rgba(255, 255, 255, 0.7);
}

@media (max-width: 768px) {
  .footer {
    padding: var(--space-8) 0 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
  }
}


/* ----------------------------------------------------------
   13. Featured Products Section (Homepage)
   ---------------------------------------------------------- */
.featured-section {
  padding: var(--space-10) 0;
}

.featured-section .section-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.featured-section .section-header h2 {
  font-size: var(--font-size-3xl);
  letter-spacing: -0.025em;
  margin-bottom: var(--space-1);
}

.featured-section .section-header p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

@media (max-width: 1024px) {
  .featured-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .featured-grid {
    grid-template-columns: 1fr;
  }

  .featured-section .section-header h2 {
    font-size: var(--font-size-2xl);
  }
}


/* ----------------------------------------------------------
   14. Category Showcase Cards (Homepage)
   ---------------------------------------------------------- */
.category-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  padding: var(--space-10) 0;
}

.category-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
  transition: transform var(--transition-base), box-shadow var(--transition-base),
    border-color var(--transition-base);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.category-card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-3);
  font-size: var(--font-size-2xl);
}

.category-card-money .category-card-icon {
  background: var(--color-money-light);
  color: var(--color-money);
}

.category-card-money:hover {
  border-color: var(--color-money);
}

.category-card-ai .category-card-icon {
  background: var(--color-ai-light);
  color: var(--color-ai);
}

.category-card-ai:hover {
  border-color: var(--color-ai);
}

.category-card-skincare .category-card-icon {
  background: var(--color-skincare-light);
  color: var(--color-skincare);
}

.category-card-skincare:hover {
  border-color: var(--color-skincare);
}

.category-card h3 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-1);
  letter-spacing: -0.01em;
}

.category-card p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
  margin-bottom: var(--space-3);
}

.category-card-link {
  font-size: var(--font-size-sm);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition-fast);
}

.category-card-link::after {
  content: '\2192';
  transition: transform var(--transition-fast);
}

.category-card-link:hover::after {
  transform: translateX(3px);
}

.category-card-money .category-card-link {
  color: var(--color-money);
}

.category-card-ai .category-card-link {
  color: var(--color-ai);
}

.category-card-skincare .category-card-link {
  color: var(--color-skincare);
}

@media (max-width: 768px) {
  .category-showcase {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}


/* ----------------------------------------------------------
   15. Newsletter / Signup Section
   ---------------------------------------------------------- */
.signup-section {
  background: var(--color-bg-alt);
  padding: var(--space-10) var(--space-3);
  text-align: center;
}

.signup-section-inner {
  max-width: 520px;
  margin: 0 auto;
}

.signup-section h2 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-1);
  letter-spacing: -0.02em;
}

.signup-section p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

.signup-form {
  display: flex;
  gap: var(--space-1);
}

.signup-form input {
  flex: 1;
  height: 48px;
  padding: 0 var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  background: var(--color-bg);
  color: var(--color-text-primary);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

.signup-form input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.signup-form .btn {
  flex-shrink: 0;
  height: 48px;
}

@media (max-width: 480px) {
  .signup-form {
    flex-direction: column;
  }

  .signup-form .btn {
    width: 100%;
  }
}


/* ----------------------------------------------------------
   16. Success Page
   ---------------------------------------------------------- */
.success-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - var(--header-height));
  margin-top: var(--header-height);
  padding: var(--space-8) var(--space-3);
  text-align: center;
}

.success-checkmark {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: #d1fae5;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  animation: scaleIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.success-checkmark svg,
.success-checkmark::after {
  color: var(--color-money);
}

.success-checkmark::after {
  content: '\2713';
  font-size: 36px;
  font-weight: 700;
}

.success-container h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-2);
  letter-spacing: -0.025em;
}

.success-container p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 480px;
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.success-container .btn {
  margin-top: var(--space-2);
}

@keyframes scaleIn {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}


/* ----------------------------------------------------------
   17. Utility Classes
   ---------------------------------------------------------- */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

/* Margin top */
.mt-1 {
  margin-top: var(--space-1);
}

.mt-2 {
  margin-top: var(--space-2);
}

.mt-3 {
  margin-top: var(--space-3);
}

.mt-4 {
  margin-top: var(--space-4);
}

/* Margin bottom */
.mb-1 {
  margin-bottom: var(--space-1);
}

.mb-2 {
  margin-bottom: var(--space-2);
}

.mb-3 {
  margin-bottom: var(--space-3);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}


/* ----------------------------------------------------------
   18. Animations
   ---------------------------------------------------------- */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Scroll-triggered animation helpers (add via JS) */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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


/* ----------------------------------------------------------
   Section backgrounds
   ---------------------------------------------------------- */
.section-alt {
  background: var(--color-bg-alt);
}

.section-dark {
  background: var(--color-dark);
  color: #ffffff;
}

.section-dark h2,
.section-dark h3 {
  color: #ffffff;
}

.section-dark p {
  color: rgba(255, 255, 255, 0.7);
}


/* ----------------------------------------------------------
   Misc / Shared patterns
   ---------------------------------------------------------- */

/* Divider */
.divider {
  width: 100%;
  height: 1px;
  background: var(--color-border);
  margin: var(--space-8) 0;
}

/* Badge — generic */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* Loading skeleton */
.skeleton {
  background: linear-gradient(90deg, var(--color-bg-alt) 25%, var(--color-border) 50%, var(--color-bg-alt) 75%);
  background-size: 200% 100%;
  animation: pulse 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  padding: var(--space-3) 0 0;
}

.breadcrumbs a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

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

.breadcrumbs .separator {
  color: var(--color-text-light);
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: var(--space-12) var(--space-3);
  color: var(--color-text-secondary);
}

.empty-state h3 {
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.empty-state p {
  font-size: var(--font-size-sm);
  max-width: 360px;
  margin: 0 auto;
  line-height: 1.6;
}


/* ----------------------------------------------------------
   Print styles
   ---------------------------------------------------------- */
@media print {
  .header,
  .footer,
  .modal-overlay,
  .hamburger {
    display: none !important;
  }

  body {
    font-size: 12pt;
    color: #000;
  }

  .container {
    max-width: 100%;
  }
}