/* ================================================================
   ASSESSMENT PORTAL — MASTER STYLESHEET
   Professional, modern, with dark mode support & animations
   ================================================================ */

/* ---- Google Fonts 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&display=swap');

/* ================================================================
   CSS VARIABLES (Design Tokens)
   Change these to update the ENTIRE app's look instantly
   ================================================================ */
:root {
    /* Brand Colors */
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #e0e7ff;
    --secondary: #0d9488;
    --secondary-hover: #0f766e;
    --accent: #f59e0b;
    --accent-hover: #d97706;

    /* Status Colors */
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;

    /* Light Theme (default) */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-navbar: #1e1b4b;
    --bg-footer: #1e1b4b;
    --bg-input: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-navbar: #e2e8f0;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 25px rgba(79, 70, 229, 0.15);

    /* Typography */
    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-base: 15px;
    --font-size-sm: 13px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 42px;
    --line-height: 1.6;

    /* Spacing */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ================================================================
   DARK MODE
   ================================================================ */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #1e293b;
    --bg-card: #1e293b;
    --bg-navbar: #0f172a;
    --bg-footer: #0f172a;
    --bg-input: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #64748b;
    --border-color: #334155;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 8px 25px rgba(79, 70, 229, 0.25);
}

/* ================================================================
   BASE STYLES
   ================================================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: var(--transition);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    color: var(--primary-hover);
}

/* ================================================================
   SCROLLBAR (Custom)
   ================================================================ */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ================================================================
   NAVBAR
   ================================================================ */
.navbar-main {
    background: var(--bg-navbar) !important;
    padding: 12px 0;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
    position: sticky;
    top: 0;
    z-index: 1050;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.navbar-main .navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: #ffffff !important;
    letter-spacing: -0.3px;
}

.navbar-main .navbar-brand img {
    height: 40px;
    width: 40px;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.navbar-main .nav-link {
    color: var(--text-navbar) !important;
    font-weight: 500;
    font-size: var(--font-size-sm);
    padding: 8px 16px !important;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.navbar-main .nav-link:hover {
    color: #ffffff !important;
    background: rgba(255, 255, 255, 0.08);
}

.navbar-main .nav-link.active {
    color: #ffffff !important;
    background: rgba(255, 255, 255, 0.12);
}

.navbar-main .nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 20px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transition: transform 0.3s ease;
}

.navbar-main .nav-link:hover::after,
.navbar-main .nav-link.active::after {
    transform: translateX(-50%) scaleX(1);
}

/* Theme Toggle Button */
.theme-toggle {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #ffffff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 18px;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(30deg);
}

/* Auth Buttons in Navbar */
.btn-nav-login {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #ffffff !important;
    padding: 6px 20px !important;
    border-radius: 50px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    transition: var(--transition);
}

.btn-nav-login:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-nav-register {
    background: var(--accent);
    border: none;
    color: #1e293b !important;
    padding: 6px 20px !important;
    border-radius: 50px;
    font-size: var(--font-size-sm);
    font-weight: 700;
    transition: var(--transition);
}

.btn-nav-register:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}

/* ================================================================
   FOOTER
   ================================================================ */
.footer-main {
    background: var(--bg-footer);
    color: var(--text-navbar);
    padding: 50px 0 0;
    margin-top: 60px;
}

.footer-main h5 {
    color: #ffffff;
    font-weight: 700;
    font-size: var(--font-size-base);
    margin-bottom: 20px;
    letter-spacing: -0.2px;
}

.footer-main p,
.footer-main a {
    color: #94a3b8;
    font-size: var(--font-size-sm);
    line-height: 1.8;
}

.footer-main a:hover {
    color: #ffffff;
    padding-left: 4px;
}

.footer-links li {
    list-style: none;
    margin-bottom: 8px;
}

.footer-links a {
    transition: var(--transition);
}

.footer-links a i {
    margin-right: 8px;
    font-size: 12px;
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 14px;
}

.footer-contact-item i {
    color: var(--accent);
    margin-top: 3px;
    font-size: 16px;
}

.footer-divider {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: 40px;
    padding: 20px 0;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.footer-bottom p {
    margin: 0;
    font-size: 12px;
}

/* Footer — dynamic company data styles */
.footer-brand {
    display: flex;
    align-items: center;
}

.footer-heading {
    color: #ffffff;
    font-weight: 700;
    font-size: 15px;
    margin-bottom: 20px;
    letter-spacing: -0.2px;
}

.footer-links {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.footer-contact {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 14px;
    color: #94a3b8;
    font-size: 14px;
}

.footer-contact li i {
    color: var(--accent, #f59e0b);
    margin-top: 3px;
    font-size: 16px;
    flex-shrink: 0;
}

.footer-contact li a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 14px;
}

.footer-contact li a:hover {
    color: #ffffff;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: 40px;
    padding: 20px 0;
}

/* ================================================================
   PAGE CONTENT
   ================================================================ */
.page-content {
    min-height: calc(100vh - 300px);
    padding: 30px 0;
}

/* ================================================================
   CARDS
   ================================================================ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}

.card-body {
    padding: 24px;
}

.card-title {
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.3px;
}

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

/* ================================================================
   BUTTONS
   ================================================================ */
.btn {
    font-family: var(--font-family);
    font-weight: 600;
    border-radius: var(--radius-sm);
    padding: 10px 24px;
    transition: var(--transition);
    letter-spacing: -0.1px;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
}

.btn-accent {
    background: var(--accent);
    border: none;
    color: #1e293b;
}

.btn-accent:hover {
    background: var(--accent-hover);
    color: #1e293b;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
}

.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline-primary:hover {
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
}

/* ================================================================
   FORMS
   ================================================================ */
.form-control,
.form-select {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    font-size: var(--font-size-base);
    transition: var(--transition);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    background: var(--bg-input);
    color: var(--text-primary);
}

.form-label {
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    margin-bottom: 6px;
}

.input-group-text {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
    color: var(--text-muted);
}

/* ================================================================
   ALERTS / MESSAGES
   ================================================================ */
.alert {
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    animation: slideDown 0.4s ease-out;
}
.alert-success { background: #d1fae5 !important; color: #065f46 !important; }
.alert-danger  { background: #fee2e2 !important; color: #991b1b !important; }
.alert-warning { background: #fef3c7 !important; color: #92400e !important; }
.alert-info    { background: #dbeafe !important; color: #1e40af !important; }
.alert .btn-close { filter: none; }

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

/* ================================================================
   BADGES
   ================================================================ */
.badge {
    font-weight: 600;
    font-size: 11px;
    padding: 5px 12px;
    border-radius: 50px;
    letter-spacing: 0.3px;
}

/* ================================================================
   FILTER BAR
   ================================================================ */
.filter-bar {
    background: var(--bg-card);
    padding: 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    margin-bottom: 25px;
}

/* ================================================================
   STAT CARDS
   ================================================================ */
.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.stat-card .stat-number {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    letter-spacing: -1px;
}

.stat-card .stat-label {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-top: 4px;
}

/* ================================================================
   HERO SECTION
   ================================================================ */
.hero-section {
    padding: 80px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.hero-title {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    letter-spacing: -1.5px;
    line-height: 1.15;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 30px;
    line-height: 1.7;
}

/* ================================================================
   SECTION HEADERS
   ================================================================ */
.section-header {
    margin-bottom: 40px;
}

.section-title {
    font-size: var(--font-size-xl);
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-primary);
}

/* ================================================================
   ANIMATIONS
   ================================================================ */
/* Fade In Up */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.6s ease-out forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Staggered animation delays for cards */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }
.stagger-6 { animation-delay: 0.6s; }

/* Fade In */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.5s ease-out forwards;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

/* Scale In */
.scale-in {
    opacity: 0;
    transform: scale(0.9);
    animation: scaleIn 0.4s ease-out forwards;
}

@keyframes scaleIn {
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Pulse (for live indicators) */
.pulse {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Smooth theme transition */
body,
.navbar-main,
.footer-main,
.card,
.form-control,
.form-select,
.filter-bar,
.stat-card,
.btn,
.alert,
.input-group-text {
    transition: background-color 0.3s ease,
                color 0.3s ease,
                border-color 0.3s ease,
                box-shadow 0.3s ease;
}

/* ================================================================
   SCROLL REVEAL (triggered by JavaScript)
   ================================================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ================================================================
   LOADING SPINNER
   ================================================================ */
.spinner-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px;
}

.spinner-border {
    color: var(--primary);
}

/* ================================================================
   EMPTY STATE
   ================================================================ */
.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state i {
    font-size: 64px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.empty-state p {
    color: var(--text-muted);
    font-size: var(--font-size-lg);
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 768px) {
    .hero-title {
        font-size: var(--font-size-2xl);
    }

    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    .stat-card .stat-number {
        font-size: var(--font-size-xl);
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* ================================================================
   DARK MODE OVERRIDES FOR BOOTSTRAP COMPONENTS
   ================================================================ */
[data-theme="dark"] .table {
    --bs-table-bg: var(--bg-secondary);
    --bs-table-color: var(--text-primary);
    --bs-table-border-color: var(--border-color);
    --bs-table-striped-bg: rgba(255, 255, 255, 0.03);
    --bs-table-hover-bg: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .modal-content {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .dropdown-menu {
    background: var(--bg-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .dropdown-item {
    color: var(--text-primary);
}

[data-theme="dark"] .dropdown-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .text-dark {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .text-muted {
    color: var(--text-muted) !important;
}

[data-theme="dark"] .bg-light {
    background-color: var(--bg-tertiary) !important;
}

[data-theme="dark"] .bg-white {
    background-color: var(--bg-card) !important;
}

/* ================================================================
   DARK MODE — COMPREHENSIVE TEXT & ELEMENT FIXES
   Ensures ALL text is visible on dark backgrounds
   ================================================================ */
[data-theme="dark"] p,
[data-theme="dark"] span,
[data-theme="dark"] label,
[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6,
[data-theme="dark"] li,
[data-theme="dark"] td,
[data-theme="dark"] th,
[data-theme="dark"] small,
[data-theme="dark"] strong,
[data-theme="dark"] div {
    color: var(--text-primary);
}

[data-theme="dark"] .card p,
[data-theme="dark"] .card span,
[data-theme="dark"] .card small,
[data-theme="dark"] .card div {
    color: var(--text-secondary);
}

[data-theme="dark"] .card h4,
[data-theme="dark"] .card h5,
[data-theme="dark"] .card h6,
[data-theme="dark"] .card .fw-bold,
[data-theme="dark"] .card .card-title {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .card .text-muted {
    color: var(--text-muted) !important;
}

/* Contact page specific fixes */
[data-theme="dark"] .footer-contact-item span,
[data-theme="dark"] .footer-contact-item a {
    color: #94a3b8;
}

[data-theme="dark"] a:not(.btn):not(.nav-link):not(.navbar-brand):not(.badge) {
    color: #818cf8;
}

[data-theme="dark"] a:not(.btn):not(.nav-link):not(.navbar-brand):not(.badge):hover {
    color: #a5b4fc;
}

/* Form elements in dark mode */
[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: var(--bg-input) !important;
    color: var(--text-primary) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .form-control::placeholder {
    color: var(--text-muted);
}

[data-theme="dark"] .input-group-text {
    background-color: #1e293b !important;
    border-color: var(--border-color) !important;
    color: var(--text-muted) !important;
}

/* Stat card numbers — keep brand colors visible */
[data-theme="dark"] .stat-card .stat-number {
    color: inherit;
}

[data-theme="dark"] .stat-card .stat-label {
    color: var(--text-muted) !important;
}

[data-theme="dark"] .stat-card h5 {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .stat-card p {
    color: var(--text-muted) !important;
}

/* Alert text */
[data-theme="dark"] .alert {
    /* Keep forced colors from .alert-success/danger/warning/info above */
}
[data-theme="dark"] .alert .btn-close { filter: none; }

/* CTA Section in dark mode */
[data-theme="dark"] .rounded-4[style*="linear-gradient"] {
    color: #ffffff !important;
}

[data-theme="dark"] .rounded-4[style*="linear-gradient"] h2,
[data-theme="dark"] .rounded-4[style*="linear-gradient"] p {
    color: #ffffff !important;
}

/* Badge text stays white on colored backgrounds */
[data-theme="dark"] .badge {
    color: #ffffff;
}

/* Card footer */
[data-theme="dark"] .card-footer {
    background: var(--bg-card) !important;
    border-color: var(--border-color) !important;
}

/* HR (horizontal rule) */
[data-theme="dark"] hr {
    border-color: var(--border-color);
    opacity: 0.3;
}

/* Section header text */
[data-theme="dark"] .section-title {
    color: var(--text-primary) !important;
}

/* Hero section */
[data-theme="dark"] .hero-title {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .hero-subtitle {
    color: var(--text-secondary) !important;
}

/* Primary light background in dark mode */
[data-theme="dark"] [style*="var(--primary-light)"] {
    background: rgba(79, 70, 229, 0.15) !important;
}

/* Success/Warning/Danger text colors preserved in dark */
[data-theme="dark"] .text-success { color: #34d399 !important; }
[data-theme="dark"] .text-danger { color: #f87171 !important; }
[data-theme="dark"] .text-warning { color: #fbbf24 !important; }
[data-theme="dark"] .text-info { color: #60a5fa !important; }
[data-theme="dark"] .text-primary { color: #818cf8 !important; }