:root {
    --tappcon-primary: #1e3a5f;
    --tappcon-secondary: #2980b9;
    --tappcon-accent: #3498db;
    --tappcon-light: #eaf2fa;
    --tappcon-bg: #f8f9fa;
    --tappcon-text: #2c3e50;
    --tappcon-success: #27ae60;
    --tappcon-warning: #e67e22;
    --tappcon-danger: #e74c3c;
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--tappcon-text);
    background-color: var(--tappcon-bg);
}

.tappcon-navbar {
    background: linear-gradient(135deg, var(--tappcon-primary) 0%, var(--tappcon-secondary) 100%);
}

.tappcon-navbar .nav-link {
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
    transition: color .2s ease;
}

.tappcon-navbar .nav-link:hover,
.tappcon-navbar .nav-link.active {
    color: #fff;
}

.text-tappcon-accent {
    color: var(--tappcon-accent);
}

.btn-tappcon-accent {
    background: var(--tappcon-accent);
    color: #fff;
    font-weight: 600;
    border-radius: 50px;
    padding: .5rem 1.5rem;
    border: none;
    transition: background .2s ease, transform .2s ease;
}

.btn-tappcon-accent:hover {
    background: #2a83c4;
    color: #fff;
    transform: translateY(-2px);
}

.btn-tappcon-primary {
    background: var(--tappcon-primary);
    color: #fff;
    font-weight: 600;
    border-radius: 50px;
    padding: .5rem 1.5rem;
    border: none;
    transition: background .2s ease, transform .2s ease;
}

.btn-tappcon-primary:hover {
    background: #162c47;
    color: #fff;
    transform: translateY(-2px);
}

.hero-section {
    background: linear-gradient(rgba(30, 58, 95, 0.92), rgba(30, 58, 95, 0.95)), url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><text y="85" font-size="85" fill="%233498db" opacity="0.08">&#9829;</text></svg>') no-repeat center center / cover;
    color: #fff;
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

.hero-badge {
    display: inline-block;
    background: rgba(52, 152, 219, 0.2);
    border: 1px solid var(--tappcon-accent);
    color: var(--tappcon-accent);
    padding: .35rem 1rem;
    border-radius: 50px;
    font-size: .85rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: 3.25rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: .5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    max-width: 800px;
    margin: 0 auto;
}

.hero-meta {
    margin-top: 1.5rem;
    font-size: 1rem;
}

.hero-meta i {
    color: var(--tappcon-accent);
    margin-right: .5rem;
}

.section-padding {
    padding: 4rem 0;
}

.section-title {
    color: var(--tappcon-primary);
    font-weight: 700;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--tappcon-accent);
    border-radius: 2px;
}

.section-subtitle {
    color: var(--tappcon-secondary);
    font-weight: 500;
    margin-bottom: 2rem;
    max-width: 700px;
}

.card-tappcon {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(30, 58, 95, 0.08);
    transition: transform .3s ease, box-shadow .3s ease;
    overflow: hidden;
}

.card-tappcon:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(30, 58, 95, 0.15);
}

.guideline-icon {
    font-size: 2rem;
    color: var(--tappcon-accent);
    margin-bottom: 1rem;
}

.team-avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: var(--tappcon-light);
    border: 3px solid var(--tappcon-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--tappcon-secondary);
    font-size: 2rem;
    margin: 0 auto 1rem;
    overflow: hidden;
}

.team-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.session-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: var(--tappcon-light);
    color: var(--tappcon-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.tappcon-footer {
    background: var(--tappcon-primary);
    color: rgba(255, 255, 255, 0.85);
}

.tappcon-footer a {
    transition: color .2s ease;
}

.tappcon-footer a:hover {
    color: var(--tappcon-accent);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--tappcon-accent);
    box-shadow: 0 0 0 .2rem rgba(52, 152, 219, 0.1);
}

.form-label {
    font-weight: 500;
    color: var(--tappcon-primary);
}

.required::after {
    content: ' *';
    color: var(--tappcon-danger);
}

.workshop-card {
    border: 2px solid #e5e9ef;
    border-radius: 12px;
    padding: 1.5rem;
    transition: border-color .2s ease, box-shadow .2s ease;
    cursor: pointer;
    height: 100%;
    background: #fff;
}

.workshop-card:hover {
    border-color: var(--tappcon-accent);
    box-shadow: 0 4px 20px rgba(52, 152, 219, 0.1);
}

.workshop-card.selected {
    border-color: var(--tappcon-accent);
    box-shadow: 0 0 0 2px rgba(52, 152, 219, 0.2);
    background: var(--tappcon-light);
}

.workshop-card.disabled {
    opacity: .5;
    cursor: not-allowed;
    border-color: #e74c3c;
}

.workshop-card input[type="radio"] {
    display: none;
}

.seats-available {
    font-size: .85rem;
    color: var(--tappcon-success);
    font-weight: 600;
}

.seats-full {
    font-size: .85rem;
    color: var(--tappcon-danger);
    font-weight: 600;
}

.fee-breakdown {
    background: #fff;
    border-radius: 12px;
    border: 2px solid var(--tappcon-light);
    padding: 1.5rem;
}

.fee-row {
    display: flex;
    justify-content: space-between;
    padding: .5rem 0;
    border-bottom: 1px solid #f0f2f5;
}

.fee-row:last-child {
    border-bottom: none;
}

.fee-total {
    font-weight: 700;
    color: var(--tappcon-primary);
    font-size: 1.1rem;
    border-bottom: none;
    padding-top: 1rem;
    border-top: 2px dashed var(--tappcon-secondary);
}

.admin-sidebar {
    background: var(--tappcon-primary);
    min-height: 100vh;
    color: #fff;
}

.admin-sidebar .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: .75rem 1.5rem;
    border-left: 3px solid transparent;
    transition: all .2s ease;
}

.admin-sidebar .nav-link:hover,
.admin-sidebar .nav-link.active {
    color: #fff;
    background: rgba(52, 152, 219, 0.2);
    border-left-color: var(--tappcon-accent);
}

.stat-card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(30, 58, 95, 0.08);
    padding: 1.5rem;
    background: #fff;
}

.stat-card .stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--tappcon-primary);
}

.stat-card .stat-label {
    color: var(--tappcon-secondary);
    font-weight: 500;
    font-size: .9rem;
}

.table-admin {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(30, 58, 95, 0.06);
}

.table-admin thead th {
    background: var(--tappcon-primary);
    color: #fff;
    font-weight: 600;
    font-size: .85rem;
    white-space: nowrap;
}

.badge-payment-pending {
    background: #fff3cd;
    color: #856404;
}

.badge-payment-received {
    background: #d4edda;
    color: #155724;
}

.badge-payment-not-received {
    background: #f8d7da;
    color: #721c24;
}

.badge-status-submitted {
    background: #d1ecf1;
    color: #0c5460;
}

.badge-status-confirmed {
    background: #d4edda;
    color: #155724;
}

.badge-status-cancelled {
    background: #f8d7da;
    color: #721c24;
}

.upload-zone {
    border: 2px dashed var(--tappcon-secondary);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    color: var(--tappcon-secondary);
    transition: all .2s ease;
    cursor: pointer;
    background: var(--tappcon-light);
}

.upload-zone:hover {
    border-color: var(--tappcon-accent);
    background: #dbeafe;
}

.upload-zone i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .section-padding {
        padding: 3rem 0;
    }
}