/* ========================================
   ROOT VARIABLES & THEME SYSTEM
   ======================================== */
:root {
    /* Brand Colors */
    --color-primary: #071A2E;
    --color-accent: #FF6B2C;
    --color-success: #20C997;
    --color-warning: #FFC107;
    --color-danger: #DC3545;
    --color-info: #00D4FF;
    
    /* Neutrals */
    --color-white: #F7F8FA;
    --color-gray-light: #E8EBF0;
    --color-gray-medium: #8892A6;
    --color-gray-dark: #3B4556;
    --color-surface: #0D1117;
    --color-surface-light: #161B22;
    --color-black: #010409;
    
    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', 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: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(255, 107, 44, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-Index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Dark Mode Theme (Default) */
body {
    --bg-primary: #071A2E;
    --bg-secondary: #0D1117;
    --bg-tertiary: #161B22;
    --text-primary: #F7F8FA;
    --text-secondary: #8892A6;
    --text-tertiary: #3B4556;
    --border-color: #21262D;
}

/* Light Mode Theme */
body.light-mode {
    --bg-primary: #FFFFFF;
    --bg-secondary: #F7F8FA;
    --bg-tertiary: #E8EBF0;
    --text-primary: #010409;
    --text-secondary: #3B4556;
    --text-tertiary: #8892A6;
    --border-color: #D0D7DE;
}

/* ========================================
   GLOBAL STYLES
   ======================================== */

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: 0.9375rem;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: #FF5A0C;
    text-decoration: underline;
}

/* ========================================
   COMPONENTS
   ======================================== */

.btn {
    font-family: var(--font-body);
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    border: none;
    padding: 0.5rem 1.25rem;
    font-size: 0.9375rem;
}

.btn-primary {
    background-color: var(--color-accent);
    color: white;
    box-shadow: 0 0 10px rgba(255, 107, 44, 0.3);
}

.btn-primary:hover {
    background-color: #FF5A0C;
    box-shadow: 0 0 20px rgba(255, 107, 44, 0.5);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--text-tertiary);
    border-color: var(--text-secondary);
}

.btn-outline-primary {
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
    background-color: transparent;
}

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

.btn-link {
    color: var(--color-accent);
    padding: 0;
    text-decoration: none;
}

.btn-link:hover {
    text-decoration: underline;
}

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* Badges */
.badge {
    font-family: var(--font-body);
    font-weight: 600;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bg-success { background-color: var(--color-success) !important; }
.bg-warning { background-color: var(--color-warning) !important; }
.bg-danger { background-color: var(--color-danger) !important; }
.bg-info { background-color: var(--color-info) !important; }

/* Form Controls */
.form-control, .form-select {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-lg);
    font-family: var(--font-body);
    transition: all var(--transition-fast);
}

.form-control:focus, .form-select:focus {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--color-accent);
    box-shadow: 0 0 0 0.2rem rgba(255, 107, 44, 0.25);
}

.form-control::placeholder {
    color: var(--text-tertiary);
}

.form-label {
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
}

/* Dropdown */
.dropdown-menu {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.dropdown-item {
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

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

.dropdown-divider {
    border-color: var(--border-color);
}

/* Tables */
.table {
    color: var(--text-primary);
    border-color: var(--border-color);
}

.table thead th {
    border-color: var(--border-color);
    background-color: var(--bg-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}

.table tbody td {
    border-color: var(--border-color);
    vertical-align: middle;
}

.table tbody tr:hover {
    background-color: var(--bg-secondary);
}

/* Cards */
.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-glow);
}

.card-header {
    background-color: var(--bg-tertiary);
    border-color: var(--border-color);
}

.card-body {
    color: var(--text-primary);
}

/* Modals */
.modal-content {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
}

.modal-header {
    border-color: var(--border-color);
}

.modal-body {
    color: var(--text-primary);
}

.modal-footer {
    border-color: var(--border-color);
}

/* Progress */
.progress {
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-lg);
}

.progress-bar {
    background-color: var(--color-accent);
    background-image: linear-gradient(45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent);
    background-size: 1rem 1rem;
}

/* Alerts */
.alert {
    border: 1px solid;
    border-radius: var(--radius-lg);
}

.alert-danger {
    background-color: rgba(220, 53, 69, 0.1);
    border-color: rgba(220, 53, 69, 0.3);
    color: #FF6B6B;
}

.alert-warning {
    background-color: rgba(255, 193, 7, 0.1);
    border-color: rgba(255, 193, 7, 0.3);
    color: #FFD700;
}

.alert-success {
    background-color: rgba(32, 201, 151, 0.1);
    border-color: rgba(32, 201, 151, 0.3);
    color: var(--color-success);
}

.alert-info {
    background-color: rgba(0, 212, 255, 0.1);
    border-color: rgba(0, 212, 255, 0.3);
    color: var(--color-info);
}

/* Utilities */
.container-fluid {
    max-width: 100%;
}

.text-muted {
    color: var(--text-secondary) !important;
}

.border {
    border-color: var(--border-color) !important;
}

.divider {
    border-top: 1px solid var(--border-color);
    margin: 1rem 0;
}

/* ========================================
   SCROLLBAR STYLING
   ======================================== */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--text-tertiary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}

/* ========================================
   ACCESSIBILITY
   ======================================== */

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Focus States */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
    body {
        background-color: white;
        color: black;
    }
    
    .no-print {
        display: none !important;
    }
}