/* QR Yoklama Sistemi - Modern CSS */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

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

/* Page Management */
.page {
    display: none;
}

.page.active {
    display: block;
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.navbar h1 {
    color: #4a5568;
    font-size: 1.8rem;
    font-weight: 700;
}

.nav-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.nav-link {
    text-decoration: none;
    color: #718096;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 10px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.nav-link:hover,
.nav-link.active {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

/* Cards */
.login-card,
.dashboard,
.scan-container,
.reports-container,
.settings-container {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
}

.login-card {
    max-width: 400px;
    margin: 50px auto;
    text-align: center;
}

.login-card h1 {
    color: #4a5568;
    margin-bottom: 10px;
    font-size: 2rem;
}

.login-card h2 {
    color: #718096;
    margin-bottom: 30px;
    font-weight: 400;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
    text-align: left;
}

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

label {
    display: block;
    margin-bottom: 8px;
    color: #4a5568;
    font-weight: 600;
}

input[type="text"],
input[type="password"],
input[type="date"],
input[type="time"],
input[type="email"] {
    width: 100%;
    padding: 15px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #f7fafc;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="email"]:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Buttons */
.btn {
    padding: 15px 30px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: #4a5568;
    color: white;
}

.btn-secondary:hover {
    background: #2d3748;
    transform: translateY(-2px);
}

.btn-danger {
    background: #e53e3e;
    color: white;
}

.btn-danger:hover {
    background: #c53030;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: #4a5568;
    border: 2px solid #e2e8f0;
}

.btn-outline:hover {
    background: #f7fafc;
    border-color: #cbd5e0;
}

/* QR Code */
.qr-form {
    background: #f7fafc;
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 30px;
}

.qr-result {
    background: #f0fff4;
    border: 2px solid #68d391;
    border-radius: 15px;
    padding: 30px;
    text-align: center;
}

.qr-container {
    margin: 20px 0;
}

.qr-container canvas {
    max-width: 300px;
    border-radius: 10px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.qr-actions {
    margin: 20px 0;
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.session-info {
    background: #edf2f7;
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px;
    text-align: left;
}

.session-info p {
    margin: 5px 0;
    color: #4a5568;
}

/* QR Scanner */
.qr-reader {
    margin: 20px 0;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.attendance-form {
    background: #f7fafc;
    padding: 30px;
    border-radius: 15px;
    margin-top: 20px;
}

/* Reports */
.reports-actions {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.filters {
    background: #f7fafc;
    padding: 25px;
    border-radius: 15px;
    margin-bottom: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    align-items: end;
}

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

.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.stat-card h3 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.stat-card p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Tables */
.table-container {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

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

.data-table th {
    background: #4a5568;
    color: white;
    padding: 20px;
    text-align: left;
    font-weight: 600;
}

.data-table td {
    padding: 15px 20px;
    border-bottom: 1px solid #e2e8f0;
}

.data-table tr:hover {
    background: #f7fafc;
}

.data-table tr:last-child td {
    border-bottom: none;
}

/* Settings */
.settings-section {
    background: #f7fafc;
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 30px;
}

.settings-section h3 {
    color: #4a5568;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.data-actions {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.info-item {
    background: white;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid #667eea;
}

.warning-text {
    color: #e53e3e;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Result Messages */
.result-message {
    padding: 15px 20px;
    border-radius: 10px;
    margin-top: 20px;
    font-weight: 500;
    text-align: center;
}

.result-message.success {
    background: #f0fff4;
    color: #22543d;
    border: 1px solid #68d391;
}

.result-message.error {
    background: #fed7d7;
    color: #742a2a;
    border: 1px solid #fc8181;
}

/* Login Info */
.login-info {
    background: #edf2f7;
    padding: 20px;
    border-radius: 10px;
    margin-top: 20px;
    text-align: left;
}

.login-info p {
    margin: 5px 0;
    color: #4a5568;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .navbar {
        flex-direction: column;
        gap: 20px;
    }
    
    .nav-links {
        justify-content: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .qr-actions {
        flex-direction: column;
    }
    
    .reports-actions {
        flex-direction: column;
    }
    
    .filters {
        grid-template-columns: 1fr;
    }
    
    .data-actions {
        flex-direction: column;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .login-card,
    .dashboard,
    .scan-container,
    .reports-container,
    .settings-container {
        padding: 20px;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 10px;
    }
    
    .qr-container canvas {
        max-width: 100%;
    }
}