/**
 * Global Styles for Stromfee.ai
 * Main layout, navigation, and base styles
 */

/* ===========================
   CSS Variables & Theme
   =========================== */
:root {
  /* Colors */
  --primary: #0EBAB1;
  --primary-dark: #0a9d95;
  --primary-light: #3ec9c1;

  --secondary: #F97F16;
  --secondary-dark: #d66e12;
  --secondary-light: #fa9944;

  --accent: #FFD700;
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;

  /* Background */
  --bg-primary: #ffffff;
  --bg-secondary: #f8f9fa;
  --bg-tertiary: #e9ecef;
  --bg-dark: #1a2130;

  /* Text */
  --text-primary: #1a2130;
  --text-secondary: #6c757d;
  --text-tertiary: #adb5bd;
  --text-inverse: #ffffff;

  /* Borders */
  --border-color: #dee2e6;
  --border-radius: 8px;
  --border-radius-sm: 4px;
  --border-radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

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

  /* Typography */
  --font-family: 'Inter', system-ui, -apple-system, 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;

  /* Transitions */
  --transition: all 0.3s ease;
  --transition-fast: all 0.15s ease;
}

/* Dark Theme */
[data-theme="dark"] {
  --bg-primary: #1a2130;
  --bg-secondary: #252d3f;
  --bg-tertiary: #2f3849;
  --bg-dark: #ffffff;

  --text-primary: #ffffff;
  --text-secondary: #cbd5e0;
  --text-tertiary: #a0aec0;
  --text-inverse: #1a2130;

  --border-color: #3f4f63;
}

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

html {
  scroll-behavior: smooth;
}

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

/* ===========================
   Navbar Styles
   =========================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .navbar {
  background: rgba(26, 33, 48, 0.95);
}

.navbar-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.navbar-brand {
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: var(--transition-fast);
}

.navbar-brand:hover {
  color: var(--primary);
}

.navbar-nav {
  display: flex;
  list-style: none;
  align-items: center;
  gap: 0.5rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.5rem 1rem;
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: var(--font-size-sm);
  border-radius: var(--border-radius-sm);
  transition: var(--transition-fast);
}

.nav-link:hover {
  background: var(--bg-secondary);
  color: var(--primary);
}

/* Dropdown Menu */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: var(--transition);
  padding: 0.5rem 0;
  margin-top: 0.5rem;
  z-index: 1001;
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--bg-secondary);
}

.dropdown-item-title {
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.dropdown-item-desc {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  line-height: 1.4;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition-fast);
}

/* Theme & Language Toggles */
.navbar-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

.navbar-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.theme-toggle, .lang-toggle {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.theme-toggle:hover, .lang-toggle:hover {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  transform: translateY(-2px);
}

.login-btn {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  display: inline-block;
}

.login-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(14, 186, 177, 0.3);
}

.icon-button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--bg-secondary);
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
}

.icon-button:hover {
  background: var(--primary);
  color: white;
}

/* ===========================
   Footer Styles
   =========================== */
footer {
  background: var(--bg-dark);
  color: var(--text-inverse);
  padding: 3rem 2rem 2rem;
  margin-top: auto;
}

[data-theme="dark"] footer {
  background: #0f1419;
}

.footer-container {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin-bottom: 1rem;
}

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

.footer-section a {
  color: var(--text-tertiary);
  text-decoration: none;
  display: block;
  padding: 0.25rem 0;
  transition: var(--transition-fast);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-tertiary);
  font-size: var(--font-size-sm);
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
  .navbar-container {
    padding: 0 1rem;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .navbar-nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--bg-primary);
    padding: 1rem;
    box-shadow: var(--shadow-lg);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: var(--transition);
  }

  .navbar-nav.active {
    max-height: calc(100vh - 70px);
    opacity: 1;
    overflow-y: auto;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    width: 100%;
    padding: 0.75rem 1rem;
  }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    margin-top: 0.5rem;
    background: var(--bg-secondary);
  }

  .navbar-controls {
    flex-direction: column;
    width: 100%;
    gap: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    margin-top: 1.5rem;
  }

  .theme-toggle,
  .lang-toggle,
  .login-btn {
    width: 100%;
    justify-content: center;
  }

  .footer-container {
    grid-template-columns: 1fr;
  }
}

/* ===========================
   Utility Classes
   =========================== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

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

.mt-1 { margin-top: var(--spacing-md); }
.mt-2 { margin-top: var(--spacing-lg); }
.mt-3 { margin-top: var(--spacing-xl); }
.mt-4 { margin-top: var(--spacing-2xl); }

.mb-1 { margin-bottom: var(--spacing-md); }
.mb-2 { margin-bottom: var(--spacing-lg); }
.mb-3 { margin-bottom: var(--spacing-xl); }
.mb-4 { margin-bottom: var(--spacing-2xl); }