/* ============================================
   FORGE DESIGN SYSTEM — RTOWebLMS
   Industrial Precision meets Modern SaaS
   ============================================ */

/* --- Google Font Import --- */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400;1,500&display=swap');

/* === DESIGN TOKENS === */
:root {
    /* --- Core Palette --- */
    --forge-slate-950: #020617;
    --forge-slate-900: #0f172a;
    --forge-slate-800: #1e293b;
    --forge-slate-700: #334155;
    --forge-slate-600: #475569;
    --forge-slate-500: #64748b;
    --forge-slate-400: #94a3b8;
    --forge-slate-300: #cbd5e1;
    --forge-slate-200: #e2e8f0;
    --forge-slate-100: #f1f5f9;
    --forge-slate-50: #f8fafc;

    /* --- Accent: Hi-Vis Amber --- */
    --forge-amber-500: #f59e0b;
    --forge-amber-400: #fbbf24;
    --forge-amber-600: #d97706;
    --forge-amber-700: #b45309;
    --forge-amber-100: #fef3c7;
    --forge-amber-50: #fffbeb;

    /* --- Semantic Colors --- */
    --forge-success: #10b981;
    --forge-success-light: #d1fae5;
    --forge-warning: #f59e0b;
    --forge-warning-light: #fef3c7;
    --forge-danger: #ef4444;
    --forge-danger-light: #fee2e2;
    --forge-info: #3b82f6;
    --forge-info-light: #dbeafe;

    /* --- Applied Colors --- */
    --forge-bg: var(--forge-slate-50);
    --forge-bg-elevated: #ffffff;
    --forge-bg-sunken: var(--forge-slate-100);
    --forge-sidebar-bg: var(--forge-slate-900);
    --forge-sidebar-hover: rgba(255, 255, 255, 0.06);
    --forge-sidebar-active: rgba(251, 191, 36, 0.12);
    --forge-topbar-bg: #ffffff;
    --forge-topbar-border: var(--forge-slate-200);

    /* --- Text --- */
    --forge-text: var(--forge-slate-900);
    --forge-text-secondary: var(--forge-slate-600);
    --forge-text-muted: var(--forge-slate-400);
    --forge-text-on-dark: var(--forge-slate-100);
    --forge-text-on-dark-muted: var(--forge-slate-400);

    /* --- Borders & Shadows --- */
    --forge-border: var(--forge-slate-200);
    --forge-border-light: var(--forge-slate-100);
    --forge-ring: rgba(245, 158, 11, 0.35);
    --forge-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --forge-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --forge-shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.08);
    --forge-shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.1);

    /* --- Typography --- */
    --forge-font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --forge-font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* --- Spacing --- */
    --forge-sidebar-width: 260px;
    --forge-sidebar-collapsed: 68px;
    --forge-topbar-height: 60px;
    --forge-radius-sm: 6px;
    --forge-radius-md: 10px;
    --forge-radius-lg: 14px;
    --forge-radius-xl: 20px;

    /* --- Transitions --- */
    --forge-transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --forge-transition-slow: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === GLOBAL RESET & BASE === */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--forge-font);
    color: var(--forge-text);
    background: var(--forge-bg);
    line-height: 1.6;
    margin: 0;
}

/* === TYPOGRAPHY OVERRIDES === */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--forge-font);
    font-weight: 700;
    line-height: 1.25;
    color: var(--forge-text);
    letter-spacing: -0.01em;
}

h1 { font-size: 1.875rem; font-weight: 800; letter-spacing: -0.025em; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; font-weight: 600; }

p { color: var(--forge-text-secondary); }

small, .text-muted {
    color: var(--forge-text-muted) !important;
}

/* === BUTTON OVERRIDES === */
.btn {
    font-family: var(--forge-font);
    font-weight: 600;
    border-radius: var(--forge-radius-sm);
    padding: 0.5rem 1.15rem;
    font-size: 0.875rem;
    transition: all var(--forge-transition);
    border: none;
    letter-spacing: 0.01em;
}

.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--forge-ring);
}

.btn-primary {
    background: var(--forge-amber-500);
    color: var(--forge-slate-900);
    border: none;
}

.btn-primary:hover, .btn-primary:active {
    background: var(--forge-amber-600);
    color: var(--forge-slate-900);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
}

.btn-outline-primary {
    border: 1.5px solid var(--forge-amber-500);
    color: var(--forge-amber-600);
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--forge-amber-50);
    border-color: var(--forge-amber-600);
    color: var(--forge-amber-700);
}

.btn-secondary {
    background: var(--forge-slate-100);
    color: var(--forge-slate-700);
    border: 1px solid var(--forge-slate-200);
}

.btn-secondary:hover {
    background: var(--forge-slate-200);
    color: var(--forge-slate-800);
}

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

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

/* === CARD OVERRIDES === */
.card {
    border: 1px solid var(--forge-border);
    border-radius: var(--forge-radius-md);
    box-shadow: var(--forge-shadow-sm);
    background: var(--forge-bg-elevated);
    transition: all var(--forge-transition);
}

.card:hover {
    box-shadow: var(--forge-shadow-md);
}

.card-header {
    background: var(--forge-bg-sunken);
    border-bottom: 1px solid var(--forge-border);
    font-weight: 600;
    padding: 0.875rem 1.25rem;
}

.card-body {
    padding: 1.25rem;
}

/* === FORM OVERRIDES === */
.form-control, .form-select {
    font-family: var(--forge-font);
    border: 1.5px solid var(--forge-slate-200);
    border-radius: var(--forge-radius-sm);
    padding: 0.6rem 0.875rem;
    font-size: 0.875rem;
    color: var(--forge-text);
    background: var(--forge-bg-elevated);
    transition: all var(--forge-transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--forge-amber-500);
    box-shadow: 0 0 0 3px var(--forge-ring);
    outline: none;
}

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

.form-label {
    font-weight: 600;
    font-size: 0.8125rem;
    color: var(--forge-text);
    margin-bottom: 0.375rem;
    letter-spacing: 0.02em;
}

/* === TABLE OVERRIDES === */
.table {
    font-size: 0.875rem;
    border-color: var(--forge-border-light);
}

.table thead th {
    background: var(--forge-bg-sunken);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--forge-text-secondary);
    border-bottom: 2px solid var(--forge-border);
    padding: 0.75rem 1rem;
}

.table tbody td {
    padding: 0.75rem 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--forge-border-light);
}

.table tbody tr:hover {
    background: var(--forge-amber-50);
}

/* === BADGE OVERRIDES === */
.badge {
    font-family: var(--forge-font);
    font-weight: 600;
    font-size: 0.7rem;
    letter-spacing: 0.03em;
    padding: 0.3em 0.65em;
    border-radius: 100px;
}

.badge.bg-primary, .badge.text-bg-primary {
    background: var(--forge-amber-100) !important;
    color: var(--forge-amber-700) !important;
}

.badge.bg-success, .badge.text-bg-success {
    background: var(--forge-success-light) !important;
    color: #065f46 !important;
}

.badge.bg-danger, .badge.text-bg-danger {
    background: var(--forge-danger-light) !important;
    color: #991b1b !important;
}

.badge.bg-warning, .badge.text-bg-warning {
    background: var(--forge-warning-light) !important;
    color: var(--forge-amber-700) !important;
}

.badge.bg-info, .badge.text-bg-info {
    background: var(--forge-info-light) !important;
    color: #1e40af !important;
}

/* === PROGRESS BAR === */
.progress {
    height: 6px;
    border-radius: 100px;
    background: var(--forge-slate-100);
    overflow: hidden;
}

.progress-bar {
    background: linear-gradient(90deg, var(--forge-amber-500), var(--forge-amber-400));
    border-radius: 100px;
    transition: width 0.6s ease;
}

/* === ALERT OVERRIDES === */
.alert {
    border-radius: var(--forge-radius-md);
    border: none;
    font-size: 0.875rem;
    font-weight: 500;
}

/* === MODAL OVERRIDES === */
.modal-content {
    border: none;
    border-radius: var(--forge-radius-lg);
    box-shadow: var(--forge-shadow-xl);
}

.modal-header {
    border-bottom: 1px solid var(--forge-border);
    padding: 1.25rem 1.5rem;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: 1px solid var(--forge-border);
    padding: 1rem 1.5rem;
}

/* === UTILITY CLASSES === */
.forge-page-header {
    margin-bottom: 1.75rem;
}

.forge-page-header h1,
.forge-page-header h2 {
    margin-bottom: 0.25rem;
}

.forge-page-header p {
    color: var(--forge-text-muted);
    font-size: 0.9rem;
    margin: 0;
}

.forge-stat-card {
    background: var(--forge-bg-elevated);
    border: 1px solid var(--forge-border);
    border-radius: var(--forge-radius-md);
    padding: 1.25rem;
    transition: all var(--forge-transition);
}

.forge-stat-card:hover {
    box-shadow: var(--forge-shadow-md);
    border-color: var(--forge-slate-300);
}

.forge-stat-card .stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--forge-text);
    line-height: 1;
    letter-spacing: -0.02em;
}

.forge-stat-card .stat-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--forge-text-muted);
    margin-top: 0.375rem;
}

.forge-stat-card .stat-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--forge-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.forge-stat-card .stat-icon.amber {
    background: var(--forge-amber-100);
    color: var(--forge-amber-600);
}

.forge-stat-card .stat-icon.emerald {
    background: var(--forge-success-light);
    color: var(--forge-success);
}

.forge-stat-card .stat-icon.blue {
    background: var(--forge-info-light);
    color: var(--forge-info);
}

.forge-stat-card .stat-icon.red {
    background: var(--forge-danger-light);
    color: var(--forge-danger);
}

/* --- Subtle Grain Texture (for sidebar) --- */
.forge-grain::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 0;
}

/* === SCROLLBAR STYLING === */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--forge-slate-300);
    border-radius: 100px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--forge-slate-400);
}

/* Dark scrollbar for sidebar */
.nav-scrollable::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
}

.nav-scrollable::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* === LINK STYLES === */
a {
    color: var(--forge-amber-600);
    text-decoration: none;
    transition: color var(--forge-transition);
}

a:hover {
    color: var(--forge-amber-700);
}

/* === SELECTION === */
::selection {
    background: var(--forge-amber-100);
    color: var(--forge-slate-900);
}

/* === ANIMATIONS === */
@keyframes forgeSlideUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes forgeFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.forge-animate-in {
    animation: forgeSlideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* Staggered children animation */
.forge-stagger > * {
    opacity: 0;
    animation: forgeSlideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.forge-stagger > *:nth-child(1) { animation-delay: 0.05s; }
.forge-stagger > *:nth-child(2) { animation-delay: 0.1s; }
.forge-stagger > *:nth-child(3) { animation-delay: 0.15s; }
.forge-stagger > *:nth-child(4) { animation-delay: 0.2s; }
.forge-stagger > *:nth-child(5) { animation-delay: 0.25s; }
.forge-stagger > *:nth-child(6) { animation-delay: 0.3s; }