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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #cbd5e1 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px;
}

/* Header Styles */
.header {
    text-align: center;
    margin-bottom: 25px;
    padding: 20px 15px;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.06);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.main-title {
    font-size: 2.4rem;
    font-weight: 700;
    color: #e74c3c;
    margin-bottom: 8px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.main-title i {
    font-size: 2.2rem;
    color: #c0392b;
}

.subtitle {
    font-size: 0.95rem;
    color: #64748b;
    font-weight: 400;
}

/* Main Content Grid */
.main-content {
    margin-bottom: 40px;
}

.grid-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

/* Card Styles */
.card {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 15px;
    padding: 22px;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s;
}

.card:hover::before {
    left: 100%;
}

.card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.08);
}

.card-red {
    border-left: 5px solid #e74c3c;
    background: linear-gradient(135deg, #ffffff 0%, #fef2f2 50%, #fee2e2 100%);
}

.card-green {
    border-left: 5px solid #27ae60;
    background: linear-gradient(135deg, #ffffff 0%, #f0fdf4 50%, #dcfce7 100%);
}

.card-icon {
    width: 65px;
    height: 65px;
    margin: 0 auto 15px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    transition: all 0.3s ease;
}

.card-red .card-icon {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
    box-shadow: 0 10px 20px rgba(231, 76, 60, 0.3);
}

.card-green .card-icon {
    background: linear-gradient(135deg, #27ae60, #2ecc71);
    color: white;
    box-shadow: 0 10px 20px rgba(39, 174, 96, 0.3);
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
}

.card h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: #2c3e50;
    line-height: 1.3;
}

.card p {
    color: #7f8c8d;
    font-size: 0.9rem;
    font-weight: 400;
}

/* Status Bar */
.status-bar {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border-radius: 12px;
    padding: 18px;
    margin-bottom: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.status-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
}

.status-item i {
    font-size: 1.2rem;
    color: #27ae60;
}

.status-item:first-child {
    color: #e74c3c;
    font-weight: 600;
}

.status-item:last-child {
    color: #7f8c8d;
}

/* Navigation */
.navigation {
    text-align: center;
}

.nav-btn {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 40px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.25);
}

.nav-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(52, 152, 219, 0.4);
}

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

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 30px;
    border-radius: 20px;
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    right: 20px;
    top: 15px;
    transition: color 0.3s ease;
}

.close:hover {
    color: #e74c3c;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .grid-row {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
    }
    
    .main-title {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header {
        padding: 30px 15px;
        margin-bottom: 30px;
    }
    
    .main-title {
        font-size: 2.5rem;
        flex-direction: column;
        gap: 15px;
    }
    
    .main-title i {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .grid-row {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .card {
        padding: 25px 20px;
    }
    
    .card h3 {
        font-size: 1.2rem;
    }
    
    .status-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .status-item {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .main-title {
        font-size: 2rem;
    }
    
    .main-title i {
        font-size: 2rem;
    }
    
    .card {
        padding: 20px 15px;
    }
    
    .card-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .nav-btn {
        padding: 12px 25px;
        font-size: 1rem;
    }
}

/* Loading Animation */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Hover Effects for Cards */
.card:hover .card-icon {
    animation: pulse 0.6s ease-in-out;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility */
.card:focus,
.nav-btn:focus {
    outline: 2px solid #3498db;
    outline-offset: 2px;
}

/* Print styles */
@media print {
    body {
        background: white;
    }
    
    .card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}