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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --text-light: #f1f5f9;
    --text-gray: #94a3b8;
    --border-color: #334155;
    --success-color: #10b981;
    --error-color: #ef4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-darker);
    color: var(--text-light);
    overflow-x: hidden;
}

/* Login Page */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
}

.login-box {
    background: var(--bg-dark);
    padding: 3rem;
    border-radius: 1rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border-color);
}

.login-box h1 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2rem;
    color: var(--text-light);
}

.login-box .form-group {
    margin-bottom: 1.5rem;
}

.login-box label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-gray);
    font-size: 0.9rem;
}

.login-box input {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: var(--text-light);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.login-box input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.login-box button {
    width: 100%;
    padding: 0.75rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.login-box button:hover {
    background: var(--secondary-color);
}

.error-message {
    background: var(--error-color);
    color: white;
    padding: 0.75rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    text-align: center;
    display: none;
}

.error-message.show {
    display: block;
}

/* Header */
.header {
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.header-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.location-filter {
    display: flex;
    gap: 0.5rem;
}

.location-btn {
    padding: 0.5rem 1rem;
    background: var(--bg-darker);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: var(--text-gray);
    cursor: pointer;
    transition: all 0.3s;
    font-size: 0.9rem;
}

.location-btn:hover {
    border-color: var(--primary-color);
    color: var(--text-light);
}

.location-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.logout-btn {
    padding: 0.5rem 1rem;
    background: var(--error-color);
    border: none;
    border-radius: 0.5rem;
    color: white;
    cursor: pointer;
    transition: opacity 0.3s;
    font-size: 0.9rem;
}

.logout-btn:hover {
    opacity: 0.8;
}

/* Camera Grid */
.camera-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1rem;
    padding: 2rem;
    max-width: 1920px;
    margin: 0 auto;
}

.camera-card {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
    position: relative;
}

.camera-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
    border-color: var(--primary-color);
}

.camera-video {
    width: 100%;
    aspect-ratio: 16/9;
    background: #000;
    display: block;
    object-fit: cover;
}

.camera-info {
    padding: 0.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.camera-name {
    font-weight: 600;
    font-size: 0.95rem;
}

.camera-status {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success-color);
}

.camera-status.offline {
    background: var(--error-color);
}

.camera-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-gray);
    font-size: 0.9rem;
}

/* Full Screen View */
.fullscreen-view {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--bg-darker);
    z-index: 2000;
}

.fullscreen-view.active {
    display: flex;
    flex-direction: column;
}

.fullscreen-header {
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.back-btn {
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    border: none;
    border-radius: 0.5rem;
    color: white;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background 0.3s;
}

.back-btn:hover {
    background: var(--secondary-color);
}

.fullscreen-video-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.fullscreen-video {
    width: 100%;
    height: 100%;
    max-width: 1920px;
    max-height: 1080px;
    background: #000;
}

/* Loading Spinner */
.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

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

/* Responsive */
@media (max-width: 1400px) {
    .camera-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .location-filter {
        flex-wrap: wrap;
    }
    
    .camera-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        padding: 1rem;
        gap: 0.75rem;
    }
}

/* Hidden */
.hidden {
    display: none !important;
}