/* ============================================
   WeekApp Landing - Shared Styles
   ============================================ */

/* === CSS Variables === */
:root {
  /* Brand Colors - Weekapp Blue */
  --primary-color: #0066FF;
  --primary-dark: #003D99;
  --primary-light: #4D94FF;
  --secondary-color: #0052CC;
  --accent-color: #00AAFF;

  /* Text Colors */
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9CA3AF;

  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-gray: #F3F4F6;
  --bg-blue-light: #F8FBFF;

  /* Border & Divider */
  --border-color: #e5e7eb;

  /* Status Colors */
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #0066FF 0%, #003D99 100%);
  --gradient-card: linear-gradient(180deg, #F8FBFF 0%, #FFFFFF 100%);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* === Global Reset === */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 2rem;
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-color);
}

h3 {
  font-size: 1.5rem;
  margin-top: var(--spacing-xl);
}

h4 {
  font-size: 1.25rem;
  margin-top: var(--spacing-lg);
}

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

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

strong {
  font-weight: 600;
  color: var(--text-primary);
}

code {
  font-family: var(--font-mono);
  background-color: var(--bg-secondary);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  font-size: 0.875em;
}

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

/* === Header === */
.site-header {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) var(--spacing-lg);
  max-width: 1200px;
  margin: 0 auto;
}

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

.logo:hover {
  color: var(--primary-dark);
  text-decoration: none;
}

.header-nav-wrapper {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-menu {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-menu a {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 1.0625rem;
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-menu a:hover {
  color: var(--primary-color);
  text-decoration: none;
}

.login-button {
  padding: 0.625rem 1.5rem;
  background: var(--primary-color);
  color: white;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.login-button:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 102, 255, 0.3);
  text-decoration: none;
  color: white;
}

/* === Main Content === */
.main-content {
  background-color: var(--bg-primary);
  max-width: 900px;
  margin: var(--spacing-2xl) auto;
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* === Document Header === */
.document-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-xl);
  border-bottom: 2px solid var(--border-color);
}

.document-title {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.document-meta {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.meta-item {
  display: inline-block;
  margin: 0 var(--spacing-sm);
}

/* === Section Styles === */
.section {
  margin-bottom: var(--spacing-2xl);
}

.section-intro {
  background-color: var(--bg-secondary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary-color);
  margin-bottom: var(--spacing-xl);
}

/* === Lists === */
ul, ol {
  margin-left: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

li {
  margin-bottom: var(--spacing-sm);
}

li ul, li ol {
  margin-top: var(--spacing-sm);
}

/* === Highlight Boxes === */
.highlight-box {
  background-color: #eff6ff;
  border-left: 4px solid var(--primary-color);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
}

.warning-box {
  background-color: #fef3c7;
  border-left: 4px solid var(--warning-color);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
}

.success-box {
  background-color: #d1fae5;
  border-left: 4px solid var(--success-color);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
}

/* === Language Divider === */
.language-divider {
  border: none;
  border-top: 3px dashed var(--border-color);
  margin: var(--spacing-2xl) 0;
}

/* === Footer === */
.site-footer {
  background-color: var(--text-primary);
  color: white;
  padding: var(--spacing-2xl) 0;
  margin-top: var(--spacing-2xl);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  text-align: center;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  list-style: none;
  margin-bottom: var(--spacing-md);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
}

.footer-links a:hover {
  color: white;
  text-decoration: underline;
}

.footer-copyright {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.875rem;
}

/* === Responsive Design === */
@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .main-content {
    margin: var(--spacing-md);
    padding: var(--spacing-lg);
  }

  .header-content {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .nav-menu {
    gap: var(--spacing-md);
  }

  .footer-links {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .document-title {
    font-size: 1.75rem;
  }

  ul, ol {
    margin-left: var(--spacing-lg);
  }
}

@media (max-width: 480px) {
  body {
    font-size: 14px;
  }

  .main-content {
    padding: var(--spacing-md);
    margin: var(--spacing-sm);
  }

  .section-intro,
  .highlight-box,
  .warning-box,
  .success-box {
    padding: var(--spacing-md);
  }
}

/* === Print Styles === */
@media print {
  .site-header,
  .site-footer {
    display: none;
  }

  .main-content {
    box-shadow: none;
    max-width: 100%;
  }

  a {
    color: inherit;
    text-decoration: underline;
  }
}