/* Notion Style Design System */

:root {
  /* Colors */
  --primary: #5645d4;
  --primary-pressed: #4534b3;
  --primary-deep: #3a2a99;
  --on-primary: #ffffff;
  --brand-navy: #0a1530;
  --brand-navy-deep: #070f24;
  --brand-navy-mid: #1a2a52;
  --link-blue: #0075de;
  --link-blue-pressed: #005bab;
  --brand-orange: #dd5b00;
  --brand-orange-deep: #793400;
  --brand-pink: #ff64c8;
  --brand-pink-deep: #a02e6d;
  --brand-purple: #7b3ff2;
  --brand-purple-300: #d6b6f6;
  --brand-purple-800: #391c57;
  --brand-teal: #2a9d99;
  --brand-green: #1aae39;
  --brand-yellow: #f5d75e;
  --brand-brown: #523410;
  --card-tint-peach: #ffe8d4;
  --card-tint-rose: #fde0ec;
  --card-tint-mint: #d9f3e1;
  --card-tint-lavender: #e6e0f5;
  --card-tint-sky: #dcecfa;
  --card-tint-yellow: #fef7d6;
  --card-tint-yellow-bold: #f9e79f;
  --card-tint-cream: #f8f5e8;
  --card-tint-gray: #f0eeec;
  --canvas: #ffffff;
  --surface: #f6f5f4;
  --surface-soft: #fafaf9;
  --hairline: #e5e3df;
  --hairline-soft: #ede9e4;
  --hairline-strong: #c8c4be;
  --ink-deep: #000000;
  --ink: #1a1a1a;
  --charcoal: #37352f;
  --slate: #5d5b54;
  --steel: #787671;
  --stone: #a4a097;
  --muted: #bbb8b1;
  --on-dark: #ffffff;
  --on-dark-muted: #a4a097;
  --semantic-success: #1aae39;
  --semantic-warning: #dd5b00;
  --semantic-error: #e03131;

  /* Typography */
  --font-family: 'Inter', 'Notion Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  
  --hero-display-size: 80px;
  --display-lg-size: 56px;
  --heading-1-size: 48px;
  --heading-2-size: 36px;
  --heading-3-size: 28px;
  --heading-4-size: 22px;
  --heading-5-size: 18px;
  --subtitle-size: 18px;
  --body-md-size: 16px;
  --body-sm-size: 14px;
  --caption-size: 13px;
  --micro-size: 12px;
  --button-md-size: 14px;

  /* Rounded */
  --rounded-xs: 4px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 12px;
  --rounded-xl: 16px;
  --rounded-xxl: 20px;
  --rounded-xxxl: 24px;
  --rounded-full: 9999px;

  /* Spacing */
  --spacing-xxs: 4px;
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 20px;
  --spacing-xl: 24px;
  --spacing-xxl: 32px;
  --spacing-xxxl: 40px;
  --spacing-section-sm: 48px;
  --spacing-section: 64px;
  --spacing-section-lg: 96px;
  --spacing-hero: 120px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--body-md-size);
  font-weight: 400;
  line-height: 1.55;
  color: var(--ink);
  background-color: var(--canvas);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-xl);
}

/* Hero Section */
.hero-band {
  background-color: var(--brand-navy);
  color: var(--on-dark);
  padding: var(--spacing-hero) var(--spacing-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-band::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle at 20% 30%, rgba(86, 69, 212, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(255, 100, 200, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(42, 157, 153, 0.05) 0%, transparent 60%);
}

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

.hero-display {
  font-size: var(--hero-display-size);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: var(--spacing-xl);
}

.hero-subtitle {
  font-size: var(--subtitle-size);
  font-weight: 400;
  line-height: 1.5;
  color: var(--on-dark-muted);
  max-width: 600px;
  margin: 0 auto var(--spacing-xxl);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-xl);
  font-size: var(--button-md-size);
  font-weight: 500;
  line-height: 1.3;
  border-radius: var(--rounded-md);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.btn-primary {
  background-color: var(--primary);
  color: var(--on-primary);
}

.btn-primary:hover {
  background-color: var(--primary-pressed);
}

.btn-secondary {
  background-color: transparent;
  color: var(--on-dark);
  border: 1px solid var(--on-dark-muted);
}

.btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.btn-dark {
  background-color: var(--ink-deep);
  color: var(--on-dark);
}

.btn-dark:hover {
  background-color: var(--charcoal);
}

.btn-group {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* Section */
.section {
  padding: var(--spacing-section-lg) 0;
}

.section-title {
  font-size: var(--heading-2-size);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.5px;
  text-align: center;
  margin-bottom: var(--spacing-section);
}

.section-subtitle {
  font-size: var(--subtitle-size);
  color: var(--steel);
  text-align: center;
  margin-bottom: var(--spacing-xxl);
}

/* Cards */
.card-base {
  background-color: var(--canvas);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-xl);
  border: 1px solid var(--hairline);
}

.card-feature {
  background-color: var(--canvas);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-xxl);
  border: 1px solid var(--hairline);
}

.card-feature-peach {
  background-color: var(--card-tint-peach);
}

.card-feature-rose {
  background-color: var(--card-tint-rose);
}

.card-feature-mint {
  background-color: var(--card-tint-mint);
}

.card-feature-lavender {
  background-color: var(--card-tint-lavender);
}

.card-feature-sky {
  background-color: var(--card-tint-sky);
}

.card-feature-yellow {
  background-color: var(--card-tint-yellow);
}

.card-feature-yellow-bold {
  background-color: var(--card-tint-yellow-bold);
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.grid-6 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--spacing-lg);
}

/* Feature Cards */
.feature-card {
  padding: var(--spacing-xxl);
  border-radius: var(--rounded-lg);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: rgba(15, 15, 15, 0.1) 0px 10px 40px -8px;
}

.feature-card h4 {
  font-size: var(--heading-4-size);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.feature-card p {
  font-size: var(--body-sm-size);
  color: var(--charcoal);
  line-height: 1.6;
}

/* Course Types */
.course-type-card {
  background-color: var(--canvas);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-xxl);
  border: 1px solid var(--hairline);
}

.course-type-card.featured {
  border-color: var(--primary);
  border-width: 2px;
  background-color: var(--surface);
}

.course-type-card h3 {
  font-size: var(--heading-3-size);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

.course-type-card .price {
  font-size: var(--heading-1-size);
  font-weight: 600;
  color: var(--ink);
  margin-bottom: var(--spacing-xs);
}

.course-type-card .period {
  font-size: var(--body-sm-size);
  color: var(--steel);
  margin-bottom: var(--spacing-xl);
}

.course-type-card ul {
  list-style: none;
  margin-bottom: var(--spacing-xxl);
}

.course-type-card li {
  padding: var(--spacing-sm) 0;
  padding-left: var(--spacing-xl);
  position: relative;
  font-size: var(--body-sm-size);
  color: var(--charcoal);
}

.course-type-card li::before {
  content: '\2714';
  position: absolute;
  left: 0;
  color: var(--brand-green);
}

/* Badges */
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--rounded-full);
  font-size: var(--caption-size);
  font-weight: 600;
}

.badge-purple {
  background-color: var(--primary);
  color: var(--on-primary);
}

.badge-pink {
  background-color: var(--brand-pink);
  color: var(--on-primary);
}

.badge-orange {
  background-color: var(--brand-orange);
  color: var(--on-primary);
}

/* Image Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.gallery-grid img {
  width: 100%;
  max-height: 400px;
  object-fit: contain;
  
  border-radius: var(--rounded-md);
  transition: transform 0.3s ease;
}

.gallery-grid img:hover {
  transform: scale(1.5);
}

/* Floating Sidebar Navigation */
.floating-nav {
  position: fixed;
  right: var(--spacing-lg);
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: 8px;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  min-width: 140px;
}

.floating-nav-header {
  font-size: var(--heading-6-size);
  font-weight: 600;
  color: var(--primary);
  padding: 6px 8px;
  margin-bottom: 4px;
  border-bottom: 1px solid var(--hairline);
  text-align: center;
}

.floating-nav-item {
  display: block;
  padding: 4px 8px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: var(--body-xs-size);
  border-radius: var(--rounded-sm);
  transition: background-color 0.2s ease, color 0.2s ease;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.floating-nav-item:hover {
  background-color: var(--card-tint-peach);
  color: var(--text-primary);
}

.floating-nav-divider {
  height: 1px;
  background-color: var(--hairline);
  margin: 4px 0;
}

@media (max-width: 768px) {
  .floating-nav {
    display: none;
  }
}

/* Commands Table */
.commands-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--canvas);
  border-radius: var(--rounded-md);
  border: 1px solid var(--hairline);
  overflow: hidden;
}

.commands-table th {
  background-color: var(--primary);
  color: var(--on-primary);
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  font-weight: 600;
  font-size: var(--body-sm-size);
}

.commands-table td {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--hairline-soft);
  font-size: var(--body-sm-size);
}

.commands-table tr:hover {
  background-color: var(--surface-soft);
}

.commands-table img {
  width: 24px;
  height: 24px;
}

@media (max-width: 768px) {
  .commands-table th,
  .commands-table td {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 11px;
  }
  
  .commands-table thead {
    display: none;
  }
  
  .commands-table tr {
    display: flex;
    flex-wrap: wrap;
    border-bottom: none;
  }
  
  .commands-table td:nth-child(1),
  .commands-table td:nth-child(2),
  .commands-table td:nth-child(3),
  .commands-table td:nth-child(4) {
    flex: 0 0 auto;
    white-space: nowrap;
    border-bottom: none;
  }
  
  .commands-table td:nth-child(5) {
    flex: 0 0 100%;
    width: 100%;
    word-break: break-all;
    border-bottom: 1px solid var(--hairline-soft);
    margin-top: 4px;
    padding-top: 8px;
    padding-bottom: 8px;
  }
  
  .commands-table img {
    width: 18px;
    height: 18px;
  }
}

/* Course Catalog */
.course-catalog {
  background-color: var(--surface);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-xxl);
}

.course-catalog h3 {
  font-size: var(--heading-3-size);
  margin-bottom: var(--spacing-xl);
}

.course-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg) 0;
  border-bottom: 1px solid var(--hairline-soft);
}

.course-item:last-child {
  border-bottom: none;
}

.course-item-title {
  font-size: var(--body-md-size);
  font-weight: 500;
  color: var(--ink);
}

.course-item-duration {
  font-size: var(--body-sm-size);
  color: var(--steel);
}

/* FAQ Section */
.faq-section {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--canvas);
  border-radius: var(--rounded-md);
  padding: var(--spacing-xl);
  border-bottom: 1px solid var(--hairline);
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item:hover {
  background-color: var(--surface-soft);
}

.faq-question {
  font-size: var(--heading-5-size);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.faq-answer {
  font-size: var(--body-sm-size);
  color: var(--charcoal);
  line-height: 1.6;
}

/* Footer */
.footer {
  background-color: var(--surface);
  padding: var(--spacing-section) var(--spacing-xl);
  border-top: 1px solid var(--hairline);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xxl);
  margin-bottom: var(--spacing-section);
}

.footer-column h4 {
  font-size: var(--heading-5-size);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

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

.footer-column li {
  padding: var(--spacing-xs) 0;
}

.footer-column a {
  font-size: var(--body-sm-size);
  color: var(--steel);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-column a:hover {
  color: var(--link-blue);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--hairline);
  font-size: var(--caption-size);
  color: var(--stone);
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--hairline-soft);
}

.navbar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-xl);
}

.navbar-logo {
  font-size: var(--heading-4-size);
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
}

.navbar-links {
  display: flex;
  gap: var(--spacing-xl);
}

.navbar-links a {
  font-size: var(--body-sm-size);
  color: var(--charcoal);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.navbar-links a:hover {
  color: var(--link-blue);
}

/* Divider */
.divider {
  height: 1px;
  background-color: var(--hairline);
  margin: var(--spacing-section) 0;
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --hero-display-size: 48px;
    --display-lg-size: 36px;
    --heading-1-size: 32px;
    --heading-2-size: 28px;
    --heading-3-size: 24px;
    --heading-4-size: 20px;
    --heading-5-size: 16px;
    --subtitle-size: 16px;
    
    --spacing-hero: 80px;
    --spacing-section-lg: 48px;
    --spacing-section: 32px;
  }

  .hero-display {
    letter-spacing: -1px;
  }

  .btn-group {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
  }

  .navbar-links {
    display: none;
  }

  .grid-2,
  .grid-3,
  .grid-6 {
    grid-template-columns: 1fr;
  }
  
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .commands-table {
    font-size: var(--body-sm-size);
  }

  .commands-table th,
  .commands-table td {
    padding: var(--spacing-sm);
  }

  .course-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-xs);
  }
  
  .card-feature p,
  .feature-card p {
    font-size: 14px;
  }
}