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

:root {
    --primary-color: #63ffd9;
    --secondary-color: #2de0ff;
    --dark-bg: #081018;
    --card-bg: rgba(14, 30, 38, 0.96);
    --text-light: #ffffff;
    --text-muted: #aab7bc;
}

body {
    font-family: 'Sarabun', sans-serif;
    background: var(--dark-bg);
    color: var(--text-light);
    overflow-x: hidden;
}

/* Background Gradients */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(circle at top right, #3fffd41a 0%, transparent 30%),
        radial-gradient(circle at bottom left, #2de0ff12 0%, transparent 30%);
    z-index: -1;
}

/* =================== NAVBAR =================== */
.custom-navbar {
    background: rgba(6, 12, 18, 0.7);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 18px 0;
}

.logo-text {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-light) !important;
}

.logo-text span {
    color: var(--primary-color);
}

.navbar-nav .nav-link {
    color: #c8d2d7 !important;
    margin: 0 10px;
    font-size: 15px;
    transition: 0.3s;
}

.navbar-nav .nav-link:hover {
    color: var(--primary-color) !important;
}

/* =================== BUTTONS =================== */
.btn-outline-light {
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #d7e1e6;
    padding: 10px 18px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.03);
    transition: 0.3s;
}

.btn-outline-light:hover {
    color: var(--primary-color);
    border-color: rgba(99, 255, 217, 0.2);
    background: rgba(99, 255, 217, 0.08);
}

.btn-light {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #071117;
    font-weight: 700;
    border: none;
    padding: 10px 22px;
    border-radius: 14px;
    box-shadow: 0 10px 30px rgba(45, 224, 255, 0.18);
    transition: 0.3s;
}

.btn-light:hover {
    transform: translateY(-2px);
    color: #071117;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: #071117;
    font-weight: 600;
    border-radius: 12px;
    padding: 10px 24px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    color: #071117;
}

/* =================== FORMS =================== */
.form-control,
.form-select {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    border-radius: 12px;
    padding: 12px 16px;
    transition: 0.3s;
}

.form-control::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.form-control:focus,
.form-select:focus {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(99, 255, 217, 0.1);
    color: var(--text-light);
}

.form-label {
    color: #c2d0d5;
    font-weight: 500;
    margin-bottom: 8px;
}

/* =================== HERO SECTION =================== */
.hero-section {
    display: flex;
    align-items: center;
    padding: 20px 0 40px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: rgba(99, 255, 217, 0.08);
    border: 1px solid rgba(99, 255, 217, 0.15);
    color: #7effe0;
    padding: 12px 18px;
    border-radius: 999px;
    margin-bottom: 30px;
    font-size: 14px;
}

.hero-title {
    font-size: 64px;
    line-height: 1.1;
    font-weight: 700;
    margin-bottom: 28px;
}

.hero-title span {
    color: var(--primary-color);
}

.hero-desc {
    color: var(--text-muted);
    font-size: 18px;
    line-height: 1.9;
    max-width: 620px;
    margin-bottom: 40px;
}

.hero-btn-main {
    background: var(--primary-color);
    color: #071117;
    padding: 16px 28px;
    border-radius: 18px;
    font-weight: 700;
    box-shadow: 0 12px 30px rgba(99, 255, 217, 0.15);
    border: none;
    transition: 0.3s;
    display: inline-block;
    text-decoration: none;
}

.hero-btn-main:hover {
    transform: translateY(-2px);
    color: #071117;
}

/* =================== CARDS =================== */
.card {
    background: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    color: var(--text-light);
    transition: 0.3s;
}

.card:hover {
    border-color: rgba(99, 255, 217, 0.2);
    box-shadow: 0 10px 40px rgba(99, 255, 217, 0.1);
}

.card-header {
    background: rgba(99, 255, 217, 0.05);
    border-bottom: 1px solid rgba(99, 255, 217, 0.1);
    border-radius: 20px 20px 0 0;
}

.card-title {
    color: var(--primary-color);
    font-weight: 600;
}

/* =================== TABLES =================== */
.table {
    color: var(--text-light);
}

.table thead {
    background: rgba(99, 255, 217, 0.08);
    border-bottom: 2px solid rgba(99, 255, 217, 0.1);
}

.table thead th {
    color: var(--primary-color);
    font-weight: 600;
    border: none;
    padding: 16px 12px;
}

.table tbody tr {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.table tbody tr:hover {
    background: rgba(99, 255, 217, 0.05);
}

.table td {
    padding: 14px 12px;
    vertical-align: middle;
}

/* =================== ALERTS =================== */
.alert-success {
    background: rgba(46, 255, 173, 0.1);
    border: 1px solid rgba(46, 255, 173, 0.2);
    color: #7effe0;
}

.alert-danger {
    background: rgba(255, 66, 66, 0.1);
    border: 1px solid rgba(255, 66, 66, 0.2);
    color: #ff8c8c;
}

.alert-warning {
    background: rgba(255, 193, 7, 0.1);
    border: 1px solid rgba(255, 193, 7, 0.2);
    color: #ffc107;
}

/* =================== ADMIN DASHBOARD =================== */
.admin-sidebar {
    background: var(--card-bg);
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    min-height: 100vh;
    padding: 20px 0;
    position: fixed;
    width: 250px;
    left: 0;
    top: 0;
}

.admin-content {
    margin-left: 250px;
    padding: 20px;
}

.admin-menu-item {
    color: #c2d0d5;
    padding: 12px 20px;
    text-decoration: none;
    display: block;
    transition: 0.3s;
    border-left: 3px solid transparent;
}

.admin-menu-item:hover,
.admin-menu-item.active {
    color: var(--primary-color);
    background: rgba(99, 255, 217, 0.08);
    border-left-color: var(--primary-color);
}

.admin-menu-item i {
    margin-right: 10px;
    width: 20px;
}

/* =================== STATUS BADGES =================== */
.badge-pending {
    background: rgba(255, 193, 7, 0.2);
    color: #ffc107;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-approved {
    background: rgba(46, 255, 173, 0.2);
    color: #2effa9;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-rejected {
    background: rgba(255, 66, 66, 0.2);
    color: #ff8c8c;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

/* =================== FOOTER =================== */
.footer {
    background: rgba(6, 12, 18, 0.8);
    backdrop-filter: blur(14px);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: 80px;
}

.footer a {
    transition: 0.3s;
}

.footer a:hover {
    color: var(--primary-color) !important;
}

/* =================== BACK TO TOP =================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #071117;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: 0.3s;
    box-shadow: 0 10px 30px rgba(99, 255, 217, 0.15);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
}

/* =================== RESPONSIVE =================== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }

    .admin-sidebar {
        width: 100%;
        position: relative;
        min-height: auto;
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .admin-content {
        margin-left: 0;
    }

    .admin-menu-item {
        display: inline-block;
        padding: 12px 16px;
    }
}