/**
 * ============================================
 * NIRF DASHBOARD - COMPLETE CSS
 * Modern, Responsive, Professional Design
 * Version 2.0 - November 2025
 * ============================================
 */

/* ============================================
   CSS VARIABLES & DESIGN TOKENS
   ============================================ */
:root {
    /* Brand Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #8b5cf6;
    --secondary-dark: #7c3aed;
    
    /* Semantic Colors */
    --success: #10b981;
    --success-light: #34d399;
    --danger: #ef4444;
    --danger-light: #f87171;
    --warning: #f59e0b;
    --warning-light: #fbbf24;
    --info: #3b82f6;
    --info-light: #60a5fa;
    
    /* Neutral Palette */
    --white: #ffffff;
    --black: #000000;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray-900: #111827;
    --gray-800: #1f2937;
    --gray-700: #374151;
    --gray-600: #4b5563;
    --gray-500: #6b7280;
    --gray-400: #9ca3af;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    --light: #f8fafc;
    
    /* Spacing Scale */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Monaco', 'Courier New', monospace;
    
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 30px;
    --font-size-4xl: 36px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--gray-900);
    background: var(--light);
    overflow-x: hidden;
}

body.sidebar-open {
    overflow: hidden;
}

img,
picture,
video,
canvas,
svg {
    display: block;
    max-width: 100%;
    height: auto;
}

input,
button,
textarea,
select {
    font: inherit;
    color: inherit;
}

button {
    cursor: pointer;
}

a {
    color: inherit;
    text-decoration: none;
}

p,
h1, h2, h3, h4, h5, h6 {
    overflow-wrap: break-word;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 12px 24px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    line-height: 1;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    user-select: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.btn-primary.btn-glow {
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    }
    to {
        box-shadow: 0 4px 20px rgba(99, 102, 241, 0.6);
    }
}

.btn-secondary {
    background: white;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--primary);
    color: white;
}

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

.btn-success:hover:not(:disabled) {
    background: var(--success-light);
}

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

.btn-danger:hover:not(:disabled) {
    background: var(--danger-light);
}

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

.btn-outline {
    background: transparent;
    border: 2px solid var(--gray-300);
    color: var(--gray-700);
}

.btn-outline:hover:not(:disabled) {
    background: var(--gray-50);
    border-color: var(--primary);
    color: var(--primary);
}

/* Button Sizes */
.btn-sm {
    padding: 8px 16px;
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: 16px 32px;
    font-size: var(--font-size-lg);
}

.btn-block {
    width: 100%;
}

/* Icon Buttons */
.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: var(--gray-100);
    color: var(--gray-700);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.btn-icon:hover {
    background: var(--primary);
    color: white;
    transform: scale(1.1);
}

.btn-icon-primary {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
}

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

.btn-icon-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

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

.btn-icon-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

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

/* ============================================
   ACTION CARDS
   ============================================ */
.action-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-10);
}

.action-card {
    background: white;
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    color: var(--gray-900);
    transition: all var(--transition-base);
    border: 2px solid transparent;
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    position: relative;
    overflow: hidden;
}

.action-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.action-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.action-card:hover::before {
    transform: scaleX(1);
}

.card-hover-effect {
    position: relative;
}

.card-hover-effect::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(99,102,241,0.05), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.card-hover-effect:hover::after {
    opacity: 1;
}

.action-icon-lg {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: white;
    flex-shrink: 0;
}

.gradient-blue {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

.gradient-green {
    background: linear-gradient(135deg, #10b981, #059669);
}

.gradient-purple {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

.gradient-orange {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.gradient-teal {
    background: linear-gradient(135deg, #14b8a6, #0d9488);
}

.gradient-red {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.action-content h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.action-content p {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    line-height: 1.5;
}

.action-arrow {
    margin-left: auto;
    color: var(--gray-400);
    transition: all var(--transition-base);
}

.action-card:hover .action-arrow {
    color: var(--primary);
    transform: translateX(4px);
}

/* ============================================
   TABLES
   ============================================ */
.table-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    margin-bottom: var(--space-8);
}

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.data-table thead {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.data-table th {
    padding: 16px 20px;
    text-align: left;
    font-weight: 600;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: var(--font-size-xs);
    white-space: nowrap;
}

.data-table td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-100);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: all var(--transition-fast);
}

.data-table tbody tr:hover {
    background: var(--gray-50);
}

.table-row-hover {
    cursor: pointer;
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* Table Cell Elements */
.college-cell {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.college-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-sm);
    flex-shrink: 0;
}

.code-badge {
    display: inline-block;
    padding: 4px 10px;
    background: var(--gray-100);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    color: var(--gray-700);
}

.score-display {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.score-badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: var(--font-size-sm);
}

.score-excellent {
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
    color: #065f46;
}

.score-good {
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    color: #1e40af;
}

.score-average {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    color: #92400e;
}

.status-pill {
    display: inline-block;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: capitalize;
}

.status-draft {
    background: var(--gray-100);
    color: var(--gray-700);
}

.status-submitted {
    background: #dbeafe;
    color: #1e40af;
}

.status-under_review {
    background: #fef3c7;
    color: #92400e;
}

.status-verified {
    background: #d1fae5;
    color: #065f46;
}

.status-published {
    background: #dcfce7;
    color: #166534;
}

.status-rejected {
    background: #fee2e2;
    color: #991b1b;
}

.time-ago {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--gray-500);
    font-size: var(--font-size-xs);
    cursor: help;
}

.action-buttons {
    display: flex;
    gap: var(--space-2);
    flex-wrap: nowrap;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-8);
}

.empty-icon {
    font-size: 64px;
    color: var(--gray-300);
    margin-bottom: var(--space-4);
}

.empty-state h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: var(--space-2);
}

.empty-state p {
    font-size: var(--font-size-base);
    color: var(--gray-600);
    margin-bottom: var(--space-6);
}

/* ============================================
   FORMS
   ============================================ */
.form-group {
    margin-bottom: var(--space-5);
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--gray-700);
    margin-bottom: var(--space-2);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: var(--font-size-sm);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-5);
}

/* ============================================
   ALERTS
   ============================================ */
.alert {
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-6);
    border-left: 4px solid;
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border-color: var(--success);
}

.alert-error {
    background: #fee2e2;
    color: #991b1b;
    border-color: var(--danger);
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border-color: var(--warning);
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border-color: var(--info);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideRight {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease-out;
}

.animate-slide-down {
    animation: slideDown 0.5s ease-out;
}

.animate-slide-up {
    animation: slideUp 0.5s ease-out;
}

.animate-slide-right {
    animation: slideRight 0.5s ease-out;
}

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

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Text Colors */
.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-info { color: var(--info); }
.text-muted { color: var(--gray-500); }

/* Background Colors */
.bg-primary { background: var(--primary); }
.bg-success { background: var(--success); }
.bg-danger { background: var(--danger); }
.bg-warning { background: var(--warning); }
.bg-light { background: var(--light); }
.bg-white { background: white; }

/* Display */
.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }

/* Flex */
.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

/* Margins */
.m-0 { margin: 0; }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }

/* Paddings */
.p-0 { padding: 0; }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }

/* Width */
.w-full { width: 100%; }
.w-auto { width: auto; }

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablets (768px - 1024px) */
@media (max-width: 1024px) {
    :root {
        --font-size-4xl: 32px;
        --font-size-3xl: 26px;
        --font-size-2xl: 22px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .action-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile (below 768px) */
@media (max-width: 768px) {
    :root {
        --space-8: 24px;
        --space-10: 32px;
        --space-12: 40px;
    }
    
    body {
        font-size: 15px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .stat-value {
        font-size: 28px;
    }
    
    .action-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }
    
    .welcome-banner {
        padding: var(--space-6);
        text-align: center;
    }
    
    .welcome-content h1 {
        font-size: 24px;
    }
    
    .welcome-actions {
        width: 100%;
        justify-content: center;
    }
    
    .section-title h2 {
        font-size: 20px;
    }
    
    .data-table {
        font-size: 13px;
    }
    
    .data-table th,
    .data-table td {
        padding: 12px;
    }
    
    .hide-mobile {
        display: none !important;
    }
    
    /* Responsive Table */
    .data-table thead {
        display: none;
    }
    
    .data-table,
    .data-table tbody,
    .data-table tr,
    .data-table td {
        display: block;
        width: 100%;
    }
    
    .data-table tr {
        margin-bottom: var(--space-4);
        border: 1px solid var(--gray-200);
        border-radius: var(--radius-md);
        padding: var(--space-4);
    }
    
    .data-table td {
        padding: var(--space-2) 0;
        border: none;
        position: relative;
        padding-left: 50%;
    }
    
    .data-table td::before {
        content: attr(data-label);
        position: absolute;
        left: 0;
        width: 45%;
        padding-right: var(--space-2);
        font-weight: 600;
        color: var(--gray-700);
    }
    
    .action-buttons {
        justify-content: flex-end;
    }
}

/* Small Mobile (below 480px) */
@media (max-width: 480px) {
    .btn {
        padding: 10px 16px;
        font-size: 13px;
    }
    
    .btn-lg {
        padding: 12px 20px;
        font-size: 15px;
    }
    
    .stat-icon {
        width: 50px;
        height: 50px;
        font-size: 24px;
    }
    
    .action-icon-lg {
        width: 56px;
        height: 56px;
        font-size: 24px;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
}

/* Desktop - Show Elements */
@media (min-width: 769px) {
    .hide-desktop {
        display: none !important;
    }
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .sidebar,
    .main-header,
    .welcome-actions,
    .action-buttons,
    .btn,
    .hide-print {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
        padding: 0;
    }
    
    .stat-card,
    .action-card,
    .table-card {
        box-shadow: none;
        border: 1px solid var(--gray-200);
    }
    
    * {
        color-adjust: exact;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
}

/* ============================================
   DARK MODE SUPPORT (Optional)
   ============================================ */
@media (prefers-color-scheme: dark) {
    /* Dark mode styles can be added here */
}

/* End of CSS */