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

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

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

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
}

.logo-img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.header h1 {
    color: white;
    font-size: 2.5rem;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

/* Login Section */
.login-section {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

.login-container {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    width: 100%;
    max-width: 400px;
}

.login-tabs {
    display: flex;
    margin-bottom: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 5px;
}

.tab-btn {
    flex: 1;
    padding: 10px;
    border: none;
    background: transparent;
    color: white;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.tab-btn.active {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.login-form h2 {
    color: white;
    margin-bottom: 20px;
    text-align: center;
    font-size: 1.5rem;
}

.login-form h2 i {
    margin-right: 10px;
}

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

.form-group label {
    display: block;
    color: white;
    margin-bottom: 5px;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(255, 255, 255, 0.2);
}

.btn-login,
.btn-pay,
.btn-submit {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 8px;
    background: linear-gradient(135deg, #4CAF50, #45a049);
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
}

.btn-login:hover,
.btn-pay:hover,
.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(76, 175, 80, 0.3);
}

.btn-login i,
.btn-pay i,
.btn-submit i {
    margin-right: 8px;
}

.hidden {
    display: none !important;
}

/* Dashboard */
.dashboard {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    margin-bottom: 30px;
}

.student-info {
    text-align: center;
    margin-bottom: 30px;
}

.student-info h2 {
    color: white;
    margin-bottom: 10px;
    font-size: 1.8rem;
}

.student-info p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 5px;
}

.status {
    font-weight: 600;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 14px;
}

.status.lunas {
    background: #4CAF50;
    color: white;
}

.status.belum {
    background: #ff9800;
    color: white;
}

.payment-section h3,
.section h3 {
    color: white;
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.payment-section h3 i,
.section h3 i {
    margin-right: 10px;
}

.payment-form {
    max-width: 300px;
    margin: 0 auto;
}

/* Admin Stats */
.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 20px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.stat-card i {
    font-size: 2rem;
    color: #4CAF50;
    margin-bottom: 10px;
}

.stat-card h3 {
    color: white;
    margin-bottom: 10px;
    font-size: 1rem;
}

.stat-card p {
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
}

/* Tables */
.table-container {
    overflow-x: auto;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    padding: 20px;
}

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

table th,
table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

table th {
    font-weight: 600;
    background: rgba(255, 255, 255, 0.1);
}

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

/* Form Row */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-row .form-group {
    margin-bottom: 0;
}

/* Notifications */
.notifications {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    max-width: 300px;
}

.notification {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    border-left: 4px solid #4CAF50;
    animation: slideIn 0.3s ease;
}

.notification.error {
    border-left-color: #f44336;
}

.notification p {
    margin: 0;
    color: #333;
    font-size: 14px;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Loading */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    color: white;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid #4CAF50;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Logout Button */
.btn-logout {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 12px 20px;
    border: none;
    border-radius: 25px;
    background: linear-gradient(135deg, #f44336, #d32f2f);
    color: white;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(244, 67, 54, 0.3);
    transition: all 0.3s ease;
    z-index: 100;
}

.btn-logout:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(244, 67, 54, 0.4);
}

.btn-logout i {
    margin-right: 8px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .header h1 {
        font-size: 2rem;
    }

    .login-container {
        padding: 20px;
        max-width: 100%;
    }

    .admin-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .table-container {
        padding: 10px;
    }

    table th,
    table td {
        padding: 8px;
        font-size: 14px;
    }

    .dashboard {
        padding: 20px;
    }

    .notifications {
        left: 10px;
        right: 10px;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .admin-stats {
        grid-template-columns: 1fr;
    }

    .logo {
        flex-direction: column;
        gap: 10px;
    }

    .header h1 {
        font-size: 1.5rem;
    }
}