/* Base Theme Variables */
:root {
  /* Typography */
  --font-heading: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;

  /* 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: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

/* Modern Theme (Современный) */
[data-theme="modern"] {
  /* Colors */
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-light: #dbeafe;
  --secondary: #8b5cf6;
  --secondary-hover: #7c3aed;
  --accent: #06b6d4;
  --accent-hover: #0891b2;

  /* Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-overlay: rgba(0, 0, 0, 0.5);

  /* Text */
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-tertiary: #94a3b8;
  --text-on-primary: #ffffff;

  /* Borders */
  --border-color: #e2e8f0;
  --border-hover: #cbd5e1;

  /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Button Styles */
  --btn-radius: var(--radius-lg);
  --btn-padding-x: 1.5rem;
  --btn-padding-y: 0.75rem;
  --btn-font-weight: 500;

  /* Link Styles */
  --link-color: var(--primary);
  --link-hover: var(--primary-hover);
  --link-decoration: none;
  --link-hover-decoration: underline;
}

/* Minimal Theme (Минимализм) */
[data-theme="minimal"] {
  /* Colors */
  --primary: #000000;
  --primary-hover: #333333;
  --primary-light: #f5f5f5;
  --secondary: #666666;
  --secondary-hover: #444444;
  --accent: #e5e5e5;
  --accent-hover: #d4d4d4;

  /* Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #fafafa;
  --bg-tertiary: #f5f5f5;
  --bg-overlay: rgba(0, 0, 0, 0.3);

  /* Text */
  --text-primary: #000000;
  --text-secondary: #666666;
  --text-tertiary: #999999;
  --text-on-primary: #ffffff;

  /* Borders */
  --border-color: #e5e5e5;
  --border-hover: #d4d4d4;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
  --shadow-md: 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 4px 8px -2px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 8px 16px -4px rgba(0, 0, 0, 0.1);

  /* Button Styles */
  --btn-radius: 0;
  --btn-padding-x: 2rem;
  --btn-padding-y: 0.875rem;
  --btn-font-weight: 400;

  /* Link Styles */
  --link-color: var(--text-primary);
  --link-hover: var(--text-secondary);
  --link-decoration: underline;
  --link-hover-decoration: none;
}

/* Corporate Theme (Корпоративный) */
[data-theme="corporate"] {
  /* Colors */
  --primary: #1e40af;
  --primary-hover: #1e3a8a;
  --primary-light: #dbeafe;
  --secondary: #059669;
  --secondary-hover: #047857;
  --accent: #dc2626;
  --accent-hover: #b91c1c;

  /* Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --bg-overlay: rgba(30, 64, 175, 0.5);

  /* Text */
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-tertiary: #9ca3af;
  --text-on-primary: #ffffff;

  /* Borders */
  --border-color: #d1d5db;
  --border-hover: #9ca3af;

  /* 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);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Button Styles */
  --btn-radius: var(--radius-sm);
  --btn-padding-x: 1.75rem;
  --btn-padding-y: 0.625rem;
  --btn-font-weight: 600;

  /* Link Styles */
  --link-color: var(--primary);
  --link-hover: var(--primary-hover);
  --link-decoration: none;
  --link-hover-decoration: underline;
}

/* Creative Theme (Креативный) */
[data-theme="creative"] {
  /* Colors */
  --primary: #ec4899;
  --primary-hover: #db2777;
  --primary-light: #fce7f3;
  --secondary: #a855f7;
  --secondary-hover: #9333ea;
  --accent: #f59e0b;
  --accent-hover: #d97706;

  /* Backgrounds */
  --bg-primary: #fefefe;
  --bg-secondary: #fdf4ff;
  --bg-tertiary: #fae8ff;
  --bg-overlay: rgba(236, 72, 153, 0.4);

  /* Text */
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;
  --text-on-primary: #ffffff;

  /* Borders */
  --border-color: #f3e8ff;
  --border-hover: #e9d5ff;

  /* Shadows */
  --shadow-sm: 0 2px 4px 0 rgba(236, 72, 153, 0.1);
  --shadow-md: 0 6px 12px -2px rgba(236, 72, 153, 0.15);
  --shadow-lg: 0 12px 24px -4px rgba(236, 72, 153, 0.2);
  --shadow-xl: 0 24px 48px -8px rgba(236, 72, 153, 0.25);

  /* Button Styles */
  --btn-radius: var(--radius-xl);
  --btn-padding-x: 2rem;
  --btn-padding-y: 0.875rem;
  --btn-font-weight: 600;

  /* Link Styles */
  --link-color: var(--primary);
  --link-hover: var(--secondary);
  --link-decoration: none;
  --link-hover-decoration: none;
}

/* Elegant Theme (Элегантный) */
[data-theme="elegant"] {
  /* Colors */
  --primary: #78716c;
  --primary-hover: #57534e;
  --primary-light: #f5f5f4;
  --secondary: #a8a29e;
  --secondary-hover: #78716c;
  --accent: #d6d3d1;
  --accent-hover: #a8a29e;

  /* Backgrounds */
  --bg-primary: #fafaf9;
  --bg-secondary: #f5f5f4;
  --bg-tertiary: #e7e5e4;
  --bg-overlay: rgba(120, 113, 108, 0.5);

  /* Text */
  --text-primary: #292524;
  --text-secondary: #57534e;
  --text-tertiary: #78716c;
  --text-on-primary: #fafaf9;

  /* Borders */
  --border-color: #e7e5e4;
  --border-hover: #d6d3d1;

  /* Shadows */
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 8px -2px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 10px 20px -5px rgba(0, 0, 0, 0.15);
  --shadow-xl: 0 20px 40px -10px rgba(0, 0, 0, 0.18);

  /* Button Styles */
  --btn-radius: var(--radius-md);
  --btn-padding-x: 1.75rem;
  --btn-padding-y: 0.75rem;
  --btn-font-weight: 500;

  /* Link Styles */
  --link-color: var(--primary);
  --link-hover: var(--primary-hover);
  --link-decoration: underline;
  --link-hover-decoration: underline;
}

/* Bold Theme (Яркий) */
[data-theme="bold"] {
  /* Colors */
  --primary: #ef4444;
  --primary-hover: #dc2626;
  --primary-light: #fee2e2;
  --secondary: #f59e0b;
  --secondary-hover: #d97706;
  --accent: #10b981;
  --accent-hover: #059669;

  /* Backgrounds */
  --bg-primary: #ffffff;
  --bg-secondary: #fef2f2;
  --bg-tertiary: #fee2e2;
  --bg-overlay: rgba(239, 68, 68, 0.5);

  /* Text */
  --text-primary: #18181b;
  --text-secondary: #3f3f46;
  --text-tertiary: #71717a;
  --text-on-primary: #ffffff;

  /* Borders */
  --border-color: #fecaca;
  --border-hover: #fca5a5;

  /* Shadows */
  --shadow-sm: 0 2px 4px 0 rgba(239, 68, 68, 0.1);
  --shadow-md: 0 6px 12px -2px rgba(239, 68, 68, 0.15);
  --shadow-lg: 0 12px 24px -4px rgba(239, 68, 68, 0.2);
  --shadow-xl: 0 24px 48px -8px rgba(239, 68, 68, 0.3);

  /* Button Styles */
  --btn-radius: var(--radius-lg);
  --btn-padding-x: 2rem;
  --btn-padding-y: 1rem;
  --btn-font-weight: 700;

  /* Link Styles */
  --link-color: var(--primary);
  --link-hover: var(--secondary);
  --link-decoration: none;
  --link-hover-decoration: underline;
}

/* Global Theme Styles */
[data-theme] .btn-primary {
  background-color: var(--primary);
  color: var(--text-on-primary);
  padding: var(--btn-padding-y) var(--btn-padding-x);
  border-radius: var(--btn-radius);
  font-weight: var(--btn-font-weight);
  transition: all var(--transition-base);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

[data-theme] .btn-primary:hover {
  background-color: var(--primary-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

[data-theme] .btn-secondary {
  background-color: var(--secondary);
  color: var(--text-on-primary);
  padding: var(--btn-padding-y) var(--btn-padding-x);
  border-radius: var(--btn-radius);
  font-weight: var(--btn-font-weight);
  transition: all var(--transition-base);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

[data-theme] .btn-secondary:hover {
  background-color: var(--secondary-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

[data-theme] .btn-outline {
  background-color: transparent;
  color: var(--primary);
  padding: var(--btn-padding-y) var(--btn-padding-x);
  border-radius: var(--btn-radius);
  font-weight: var(--btn-font-weight);
  transition: all var(--transition-base);
  border: 2px solid var(--primary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

[data-theme] .btn-outline:hover {
  background-color: var(--primary);
  color: var(--text-on-primary);
  box-shadow: var(--shadow-md);
}

[data-theme] .btn-ghost {
  background-color: transparent;
  color: var(--primary);
  padding: var(--btn-padding-y) var(--btn-padding-x);
  border-radius: var(--btn-radius);
  font-weight: var(--btn-font-weight);
  transition: all var(--transition-base);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}

[data-theme] .btn-ghost:hover {
  background-color: var(--primary-light);
  color: var(--primary-hover);
}

[data-theme] a:not(.btn-primary):not(.btn-secondary):not(.btn-outline):not(.btn-ghost) {
  color: var(--link-color);
  text-decoration: var(--link-decoration);
  transition: all var(--transition-fast);
}

[data-theme] a:not(.btn-primary):not(.btn-secondary):not(.btn-outline):not(.btn-ghost):hover {
  color: var(--link-hover);
  text-decoration: var(--link-hover-decoration);
}

[data-theme] .card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--btn-radius);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

[data-theme] .card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

[data-theme] .input,
[data-theme] input[type="text"],
[data-theme] input[type="email"],
[data-theme] input[type="tel"],
[data-theme] input[type="password"],
[data-theme] textarea,
[data-theme] select {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  transition: all var(--transition-fast);
  width: 100%;
}

[data-theme] .input:focus,
[data-theme] input:focus,
[data-theme] textarea:focus,
[data-theme] select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-light);
}

[data-theme] .badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  font-weight: 500;
  background-color: var(--primary-light);
  color: var(--primary);
}

[data-theme] .divider {
  height: 1px;
  background-color: var(--border-color);
  margin: var(--spacing-lg) 0;
}