/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    line-height: 1.6;
    color: #1f2937;
}

.container {
    max-width: 1200px;
    width: 100%;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 30px;
    color: white;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 10px;
}

.logo h1 {
    font-size: 28px;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.subtitle {
    font-size: 16px;
    opacity: 0.95;
    font-weight: 500;
}

/* Card */
.card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 40px;
    margin-bottom: 20px;
}

.card-header {
    text-align: center;
    margin-bottom: 30px;
}

.card-header h2 {
    font-size: 24px;
    font-weight: 700;
    color: #1f2937;
    margin-bottom: 10px;
}

.card-header p {
    color: #6b7280;
    font-size: 15px;
}

/* Success Icon */
.success-icon {
    text-align: center;
    margin-bottom: 30px;
}

.success-details {
    margin: 30px 0;
    text-align: center;
}

.session-info {
    margin-top: 20px;
    padding: 15px;
    background: #f3f4f6;
    border-radius: 8px;
    border-left: 4px solid #2563eb;
}

.session-info code {
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: #2563eb;
    background: white;
    padding: 2px 6px;
    border-radius: 4px;
}

/* Form Styles */
.registration-form {
    margin-top: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #374151;
    font-size: 14px;
}

.required {
    color: #ef4444;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-group input:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group input::placeholder {
    color: #9ca3af;
}

/* Info Box */
.info-box {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    padding: 16px;
    margin: 25px 0;
    display: flex;
    gap: 12px;
    align-items: start;
}

.info-box svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: #2563eb;
}

.info-box p {
    color: #1e40af;
    font-size: 14px;
    margin: 0;
    line-height: 1.5;
}

/* Error Message */
.error-message {
    background: #fee2e2;
    border: 1px solid #fca5a5;
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 25px;
    display: flex;
    gap: 12px;
    align-items: center;
    color: #991b1b;
    font-size: 14px;
    font-weight: 500;
}

.error-message svg {
    flex-shrink: 0;
}

/* Buttons */
.submit-btn {
    width: 100%;
    padding: 14px 24px;
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
}

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

.action-buttons {
    display: flex;
    gap: 12px;
    margin-top: 30px;
    justify-content: center;
}

.secondary-btn {
    padding: 12px 24px;
    background: white;
    color: #2563eb;
    border: 2px solid #2563eb;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.secondary-btn:hover {
    background: #eff6ff;
    transform: translateY(-2px);
}

/* Sessions Table */
.sessions-table {
    overflow-x: auto;
    margin: 30px 0;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: #f3f4f6;
}

th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: #374151;
    font-size: 14px;
    border-bottom: 2px solid #e5e7eb;
}

td {
    padding: 12px;
    border-bottom: 1px solid #e5e7eb;
    font-size: 14px;
    color: #4b5563;
}

tr:hover {
    background: #f9fafb;
}

td code {
    font-family: 'Courier New', monospace;
    font-size: 12px;
    background: #f3f4f6;
    padding: 2px 6px;
    border-radius: 4px;
    color: #374151;
}

/* Badges */
.badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    display: inline-block;
}

.badge-success {
    background: #d1fae5;
    color: #065f46;
}

.badge-pending {
    background: #fef3c7;
    color: #92400e;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: #6b7280;
}

/* Footer */
.footer {
    text-align: center;
    color: white;
    font-size: 14px;
    opacity: 0.9;
}

.footer p {
    margin: 5px 0;
}

.footer-note {
    font-style: italic;
    font-size: 13px;
}

/* Responsive */
@media (max-width: 640px) {
    .card {
        padding: 30px 20px;
    }

    .logo h1 {
        font-size: 22px;
    }

    .card-header h2 {
        font-size: 20px;
    }

    table {
        font-size: 12px;
    }

    th, td {
        padding: 8px;
    }
}