/* Tech UI Theme */
:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #06b6d4;
    --accent-color: #22d3ee;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #38bdf8;
    --surface: #0f172a;
    --surface-soft: #111b33;
    --text-primary: #e2e8f0;
    --text-muted: #94a3b8;
    --border-color: rgba(148, 163, 184, 0.25);
    --card-bg: rgba(255, 255, 255, 0.95);
    --shadow-sm: 0 6px 16px rgba(15, 23, 42, 0.14);
    --shadow-md: 0 12px 28px rgba(15, 23, 42, 0.18);
    --shadow-lg: 0 24px 48px rgba(15, 23, 42, 0.22);
}

/* Body and Typography */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    min-height: 100vh;
    color: #0f172a;
    background:
        radial-gradient(circle at 15% 20%, rgba(99, 102, 241, 0.35), transparent 35%),
        radial-gradient(circle at 85% 80%, rgba(34, 211, 238, 0.28), transparent 30%),
        linear-gradient(135deg, #060b1a 0%, #0e1b35 52%, #112a46 100%);
    background-attachment: fixed;
    position: relative;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.22;
    background-image:
        linear-gradient(rgba(148, 163, 184, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, 0.1) 1px, transparent 1px);
    background-size: 34px 34px;
    mask-image: radial-gradient(circle at center, black 40%, transparent 92%);
    z-index: 0;
}

.main-content,
.navbar,
.footer {
    position: relative;
    z-index: 1;
}

h1, h2, h3, h4, h5, .navbar-brand {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    letter-spacing: 0.2px;
}

/* Navbar */
.navbar {
    background: rgba(8, 16, 35, 0.72) !important;
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(148, 163, 184, 0.2);
    box-shadow: 0 8px 24px rgba(2, 6, 23, 0.35);
    padding: 0.85rem 0;
}

.navbar-brand {
    font-size: 1.35rem;
    font-weight: 700;
    color: #e2e8f0 !important;
    transition: transform 0.25s ease, color 0.25s ease;
}

.brand-wordmark {
    letter-spacing: 0.8px;
    text-transform: uppercase;
    font-size: 1.15rem;
    font-weight: 800;
    background: linear-gradient(90deg, #c4b5fd 0%, #93c5fd 45%, #67e8f9 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-brand:hover {
    transform: translateY(-1px);
    color: #a5b4fc !important;
}

.nav-link {
    font-weight: 500;
    transition: all 0.25s ease;
    border-radius: 10px;
    padding: 0.45rem 0.85rem !important;
    margin: 0 0.2rem;
    color: rgba(226, 232, 240, 0.9) !important;
}

.nav-link:hover {
    color: #dbeafe !important;
    background: rgba(99, 102, 241, 0.16);
}

.nav-register-btn {
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: #ffffff !important;
    border: none;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.nav-register-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    color: #ffffff !important;
}

/* Main Content */
.main-content {
    min-height: calc(100vh - 200px);
    padding: 2rem 0;
}

/* Cards */
.card {
    border: 1px solid rgba(148, 163, 184, 0.22);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.97) 0%, rgba(247, 250, 255, 0.94) 100%);
    overflow: hidden;
    backdrop-filter: blur(8px);
    position: relative;
}

.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.85), rgba(34, 211, 238, 0.85));
    opacity: 0.8;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 24px 52px rgba(15, 23, 42, 0.28);
}

.card-header {
    background: linear-gradient(135deg, #312e81 0%, #4f46e5 48%, #0891b2 100%);
    color: #ffffff;
    border: none;
    padding: 1rem 1.2rem;
    font-weight: 600;
}

.card-body {
    color: #0f172a;
}

/* Buttons */
.btn {
    border-radius: 10px;
    padding: 0.56rem 1.25rem;
    font-weight: 600;
    transition: all 0.25s ease;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 28px rgba(79, 70, 229, 0.38);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
}

.btn-success:hover,
.btn-outline-primary:hover,
.btn-outline-success:hover,
.btn-outline-danger:hover {
    transform: translateY(-1px);
}

.btn-outline-primary,
.btn-outline-success,
.btn-outline-danger {
    background: rgba(248, 250, 252, 0.9);
}

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

/* Forms */
.form-control,
.form-select {
    border-radius: 10px;
    border: 1px solid #cbd5e1;
    padding: 0.72rem 0.95rem;
    transition: all 0.25s ease;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
    outline: none;
}

.form-label {
    font-weight: 500;
    color: #1e293b;
    margin-bottom: 0.45rem;
}

/* Tables */
.table {
    background: transparent;
    border-radius: 10px;
    overflow: hidden;
}

.table thead {
    background: linear-gradient(135deg, #4f46e5 0%, #0891b2 100%);
    color: white;
}

.table tbody tr {
    transition: background-color 0.2s ease;
}

.table tbody tr:hover {
    background-color: rgba(99, 102, 241, 0.08);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.45s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(16px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-16px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-left {
    animation: slideInLeft 0.3s ease-out;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, rgba(7, 13, 30, 0.9) 0%, rgba(16, 24, 46, 0.9) 100%);
    color: #e2e8f0;
    border-top: 1px solid rgba(99, 102, 241, 0.25);
    backdrop-filter: blur(12px);
    margin-top: auto;
    box-shadow: 0 -8px 28px rgba(2, 6, 23, 0.28);
}

.footer .text-muted {
    color: rgba(226, 232, 240, 0.75) !important;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 1rem;
    align-items: center;
}

.footer-brand h6 {
    font-family: 'Space Grotesk', 'Inter', sans-serif;
    font-weight: 700;
    color: #f8fafc;
}

.footer-brand p {
    margin: 0;
    color: rgba(226, 232, 240, 0.72);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.footer-links a {
    color: rgba(191, 219, 254, 0.9);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: #e0e7ff;
}

.footer-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.2rem;
    color: rgba(226, 232, 240, 0.72);
    font-size: 0.86rem;
}

/* Responsive */
@media (max-width: 768px) {
    .main-content {
        padding: 1rem 0;
    }

    .card {
        margin-bottom: 1rem;
    }

    .navbar-brand {
        font-size: 1.15rem;
    }

    .footer-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
        flex-wrap: wrap;
    }

    .footer-meta {
        align-items: center;
    }
}

/* Utilities */
.text-gradient {
    background: linear-gradient(135deg, #6366f1 0%, #22d3ee 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bg-gradient-light {
    background: linear-gradient(135deg, #eff6ff 0%, #e0f2fe 100%);
}

.shadow-hover {
    transition: box-shadow 0.25s ease;
}

.shadow-hover:hover {
    box-shadow: var(--shadow-lg);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #dbeafe;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #4f46e5 0%, #0891b2 100%);
    border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
    background: #4338ca;
}