/**
 * Design Tokens - Centralized Color System
 * =========================================
 * Single source of truth for all colors, spacing, and visual properties.
 * Import this file first in all pages.
 */

/* ========================================
   LIGHT MODE (Default)
   ======================================== */
:root {
    /* Primary Colors */
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-primary-active: #1d4ed8;
    --color-primary-light: rgba(59, 130, 246, 0.1);
    --color-primary-muted: rgba(59, 130, 246, 0.15);

    /* Secondary / Accent */
    --color-secondary: #8b5cf6;
    --color-secondary-hover: #7c3aed;

    /* Status Colors */
    --color-success: #10b981;
    --color-success-hover: #059669;
    --color-success-light: rgba(16, 185, 129, 0.1);

    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;
    --color-danger-light: rgba(239, 68, 68, 0.1);

    --color-warning: #f59e0b;
    --color-warning-hover: #d97706;
    --color-warning-light: rgba(245, 158, 11, 0.1);

    --color-info: #06b6d4;
    --color-info-hover: #0891b2;

    /* Backgrounds */
    --bg-base: #f8fafc;
    --bg-elevated: #ffffff;
    --bg-subtle: #f1f5f9;
    --bg-muted: #e2e8f0;
    --bg-overlay: rgba(0, 0, 0, 0.5);

    /* Text Colors */
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --text-subtle: #94a3b8;
    --text-inverse: #ffffff;

    /* Borders */
    --border-default: #e2e8f0;
    --border-muted: #f1f5f9;
    --border-strong: #cbd5e1;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

    /* Focus Ring */
    --focus-ring: 0 0 0 3px rgba(59, 130, 246, 0.4);

    /* Component Specific - Navbar */
    --nav-bg: #ffffff;
    --nav-border: var(--border-default);
    --nav-text: var(--text-primary);
    --nav-text-muted: var(--text-muted);
    --nav-height: 64px;

    /* Component Specific - Sidebar */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 72px;
    --sidebar-bg: #ffffff;
    --sidebar-border: var(--border-default);
    --sidebar-text: var(--text-muted);
    --sidebar-text-hover: var(--text-primary);
    --sidebar-active-bg: var(--color-primary-light);

    /* Component Specific - Cards */
    --card-bg: #ffffff;
    --card-border: var(--border-default);
    --card-shadow: var(--shadow-md);

    /* Component Specific - Inputs */
    --input-bg: #ffffff;
    --input-border: var(--border-default);
    --input-border-focus: var(--color-primary);
    --input-text: var(--text-primary);
    --input-placeholder: var(--text-subtle);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
}

/* ========================================
   DARK MODE
   ======================================== */
.dark-mode,
[data-theme="dark"] {
    /* Primary Colors - Slightly brighter for dark backgrounds */
    --color-primary: #60a5fa;
    --color-primary-hover: #3b82f6;
    --color-primary-active: #2563eb;
    --color-primary-light: rgba(96, 165, 250, 0.15);
    --color-primary-muted: rgba(96, 165, 250, 0.1);

    /* Secondary / Accent */
    --color-secondary: #a78bfa;
    --color-secondary-hover: #8b5cf6;

    /* Status Colors */
    --color-success: #34d399;
    --color-success-hover: #10b981;
    --color-success-light: rgba(52, 211, 153, 0.15);

    --color-danger: #f87171;
    --color-danger-hover: #ef4444;
    --color-danger-light: rgba(248, 113, 113, 0.15);

    --color-warning: #fbbf24;
    --color-warning-hover: #f59e0b;
    --color-warning-light: rgba(251, 191, 36, 0.15);

    --color-info: #22d3ee;
    --color-info-hover: #06b6d4;

    /* Backgrounds */
    --bg-base: #0f172a;
    --bg-elevated: #1e293b;
    --bg-subtle: #1e293b;
    --bg-muted: #334155;
    --bg-overlay: rgba(0, 0, 0, 0.7);

    /* Text Colors - Enhanced contrast for WCAG AA */
    --text-primary: #f1f5f9;
    --text-secondary: #e2e8f0;
    --text-muted: #94a3b8;
    --text-subtle: #64748b;
    --text-inverse: #0f172a;

    /* Borders */
    --border-default: #334155;
    --border-muted: #1e293b;
    --border-strong: #475569;

    /* Shadows - More subtle on dark */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);

    /* Focus Ring */
    --focus-ring: 0 0 0 3px rgba(96, 165, 250, 0.4);

    /* Component Specific - Navbar */
    --nav-bg: #0f172a;
    --nav-border: #1e293b;
    --nav-text: #f1f5f9;
    --nav-text-muted: #94a3b8;

    /* Component Specific - Sidebar */
    --sidebar-bg: #0f172a;
    --sidebar-border: #1e293b;
    --sidebar-text: #94a3b8;
    --sidebar-text-hover: #f1f5f9;
    --sidebar-active-bg: var(--color-primary-light);

    /* Component Specific - Cards */
    --card-bg: #1e293b;
    --card-border: #334155;
    --card-shadow: var(--shadow-md);

    /* Component Specific - Inputs */
    --input-bg: #1e293b;
    --input-border: #334155;
    --input-border-focus: var(--color-primary);
    --input-text: var(--text-primary);
    --input-placeholder: var(--text-muted);
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

/* Text Colors */
.text-primary { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-subtle { color: var(--text-subtle) !important; }
.text-success { color: var(--color-success) !important; }
.text-danger { color: var(--color-danger) !important; }
.text-warning { color: var(--color-warning) !important; }

/* Background Colors */
.bg-base { background-color: var(--bg-base) !important; }
.bg-elevated { background-color: var(--bg-elevated) !important; }
.bg-subtle { background-color: var(--bg-subtle) !important; }
.bg-primary { background-color: var(--color-primary) !important; }
.bg-success { background-color: var(--color-success) !important; }
.bg-danger { background-color: var(--color-danger) !important; }

/* Button Base Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

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

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

.btn-success {
    background-color: var(--color-success);
    color: var(--text-inverse);
}

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

.btn-danger {
    background-color: var(--color-danger);
    color: var(--text-inverse);
}

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

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-default);
    color: var(--text-primary);
}

.btn-outline:hover {
    background-color: var(--bg-subtle);
    border-color: var(--border-strong);
}

/* Card Component */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
}

/* Badge Component */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-full);
}

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

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

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

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

/* Input Component */
.input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-md);
    color: var(--input-text);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.input::placeholder {
    color: var(--input-placeholder);
}

.input:focus {
    outline: none;
    border-color: var(--input-border-focus);
    box-shadow: var(--focus-ring);
}

/* Glassmorphism Effect */
.glass {
    background: rgba(30, 41, 59, 0.8);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.light-mode .glass,
[data-theme="light"] .glass {
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(0, 0, 0, 0.08);
}