/* Enhanced Base Styling */
:root {
    --primary-color: #007bff;
    --primary-dark: #0056b3;
    --primary-light: #b3d1ff;
    --primary-lighter: #e3f0ff;
    --success: #2ecc71;
    --success-dark: #27ae60;
    --danger: #e74c3c;
    --danger-dark: #c0392b;
    --text-color: #333;
    --text-light: #666;
    --background: #f7f7f9;
    --header-bg: #222;
    --header-text: #fff;
    --border-radius: 12px;
    --box-shadow: 0 4px 18px rgba(0,123,255,0.08);
    --box-shadow-hover: 0 8px 28px rgba(0,123,255,0.15);
    --transition: all 0.3s ease;
}

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

body { 
    font-family: 'Segoe UI', Arial, Helvetica, sans-serif; 
    margin: 0; 
    background: var(--background); 
    color: var(--text-color);
    line-height: 1.6;
}

.container { 
    max-width: 1200px; 
    margin: 0 auto; 
    padding: 20px;
    width: 100%;
}

/* Enhanced Header */
.site-header { 
    background: var(--header-bg); 
    color: var(--header-text);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container { 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
    padding: 12px 20px;
}

.site-header h1 { 
    margin: 0; 
    font-size: 22px;
    font-weight: 600;
}

.site-header h1 a {
    color: var(--header-text);
    text-decoration: none;
    transition: var(--transition);
}

.site-header h1 a:hover {
    color: var(--primary-light);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 16px;
}

.main-nav a { 
    color: var(--header-text); 
    text-decoration: none; 
    font-weight: 600;
    padding: 6px 10px;
    border-radius: 6px;
    transition: var(--transition);
}

.main-nav a:hover { 
    background: rgba(255,255,255,0.1);
}

/* Enhanced Footer */
.site-footer { 
    text-align: center; 
    padding: 20px; 
    margin-top: 40px; 
    color: var(--text-light);
    border-top: 1px solid rgba(0,0,0,0.1);
    background: rgba(255,255,255,0.5);
    backdrop-filter: blur(10px);
}

/* Simple form styles */
.form label, .inline-form label { 
    display: inline-block; 
    margin-right: 12px;
    font-weight: 600;
}

.form input, .form select { 
    display: block; 
    padding: 10px 12px; 
    margin-top: 6px; 
    width: 260px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: var(--transition);
}

.form input:focus, .form select:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0,123,255,0.15);
}

.form button, .inline-form button { 
    padding: 10px 16px; 
    margin-top: 10px; 
    cursor: pointer;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
}

.form button:hover, .inline-form button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* Grid for rooms used by both public building view and admin */
.rooms { 
    display: grid; 
    grid-template-columns: repeat(10, 1fr); 
    gap: 16px;
}

.room { 
    padding: 16px; 
    border-radius: var(--border-radius); 
    color: #fff; 
    text-align: center; 
    font-weight: 700;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    transition: var(--transition);
}

.room:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
}

.room.vacant { 
    background: var(--success);
}

.room.occupied { 
    background: var(--danger);
}

/* Admin grids */
.rooms-grid { 
    display: grid; 
    grid-template-columns: repeat(10, 1fr); 
    gap: 16px; 
    margin-bottom: 24px;
}

.room-box { 
    padding: 16px; 
    border-radius: var(--border-radius); 
    color: #fff; 
    text-align: center;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    transition: var(--transition);
}

.room-box:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
}

.room-box .room-code { 
    font-size: 16px;
    font-weight: 700;
}

.room-box .room-status { 
    font-size: 14px; 
    opacity: 0.9; 
    margin-bottom: 8px;
}

/* Overwrite colors for admin specific classes */
.room-box.vacant { 
    background: var(--success-dark);
}

.room-box.occupied { 
    background: var(--danger-dark);
}

/* Minor */
.inline-update select { 
    margin-bottom: 8px;
}

.alert { 
    padding: 12px; 
    border-radius: 8px; 
    margin-bottom: 16px;
}

.alert.error { 
    background: #ffdddd; 
    color: #900; 
    border: 1px solid #f5c6cb;
}

/* Building Cards (from existing CSS, enhanced) */
.building-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8faff 70%, #e3f0ff 100%);
    border-radius: 16px;
    box-shadow: 0 4px 18px rgba(0,123,255,0.08);
    padding: 32px 18px 24px 18px;
    text-decoration: none;
    transition: transform 0.18s, box-shadow 0.18s, background 0.3s;
    border: 1px solid #e3eafc;
    position: relative;
    overflow: hidden;
}
.building-card::before {
    content: "";
    position: absolute;
    top: -40%;
    left: -40%;
    width: 180%;
    height: 180%;
    background: radial-gradient(circle at 60% 40%, #b3d1ff33 0%, transparent 70%);
    z-index: 0;
    transition: opacity 0.3s;
    opacity: 0.7;
}
.building-card:hover {
    transform: translateY(-8px) scale(1.04);
    box-shadow: 0 12px 36px rgba(0,123,255,0.18);
    border-color: #007bff;
    background: linear-gradient(135deg, #e3f0ff 60%, #f8faff 100%);
}
.building-card:hover::before {
    opacity: 1;
}
.building-icon {
    margin-bottom: 18px;
    z-index: 1;
}
.building-icon svg {
    filter: drop-shadow(0 2px 6px #b3d1ff88);
}
.building-name {
    font-size: 1.35rem;
    font-weight: 700;
    color: #007bff;
    text-align: center;
    letter-spacing: 0.5px;
    z-index: 1;
    margin-top: 2px;
}

/* Enhanced Building Selection (from existing CSS) */
.enhanced-buildings {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 28px;
    margin-top: 32px;
}

/* Login Form Styles (from existing CSS) */
.form {
    max-width: 400px;
    margin: 32px auto;
    padding: 32px 24px 24px 24px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.10);
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.form label {
    font-weight: 600;
    color: #222;
    margin-bottom: 6px;
}
.form input[type="text"],
.form input[type="password"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 16px;
    background: #f9f9f9;
    transition: border-color 0.2s;
}
.form input[type="text"]:focus,
.form input[type="password"]:focus {
    border-color: #007bff;
    outline: none;
}
.form button[type="submit"] {
    padding: 12px 0;
    background: linear-gradient(90deg, #007bff 60%, #0056b3 100%);
    color: #fff;
    font-weight: bold;
    border: none;
    border-radius: 6px;
    font-size: 17px;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,123,255,0.08);
    transition: background 0.2s;
}
.form button[type="submit"]:hover {
    background: linear-gradient(90deg, #0056b3 60%, #007bff 100%);
}
.alert.error {
    background: #ffeaea;
    color: #d8000c;
    border: 1px solid #f5c6cb;
    border-radius: 6px;
    padding: 10px;
    margin-bottom: 18px;
    font-size: 15px;
}

/* Responsive Adjustments */
@media (max-width: 1200px) {
    .container {
        max-width: 900px;
        padding: 16px;
    }
    .rooms, .rooms-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

@media (max-width: 900px) {
    .enhanced-buildings {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 16px;
    }
    .building-card {
        padding: 18px 8px 14px 8px;
        border-radius: 12px;
    }
    .building-name {
        font-size: 1.1rem;
    }
    
    .container {
        max-width: 100%;
        padding: 12px;
    }
    .rooms, .rooms-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 600px) {
    .enhanced-buildings {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 8px;
    }
    .building-card {
        padding: 10px 2px 8px 2px;
        border-radius: 8px;
    }
    .building-icon svg {
        width: 28px;
        height: 28px;
    }
    .building-name {
        font-size: 1rem;
        margin-top: 0;
    }
    
    .container {
        padding: 8px;
    }
    .site-header .container {
        flex-direction: column;
        align-items: flex-start;
        padding: 10px 8px;
    }
    .site-header h1 {
        font-size: 18px;
        margin-bottom: 8px;
    }
    .main-nav {
        width: 100%;
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-bottom: 4px;
    }
    .main-nav a {
        font-size: 14px;
        padding: 4px 8px;
    }
    .rooms, .rooms-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }
    .room, .room-box {
        padding: 10px;
        font-size: 14px;
    }
    
    .form {
        max-width: 98%;
        padding: 18px 12px;
        gap: 12px;
    }
    .form input[type="text"],
    .form input[type="password"] {
        font-size: 15px;
        padding: 10px;
    }
    .form button[type="submit"] {
        font-size: 15px;
        padding: 10px 0;
    }
}

@media (max-width: 480px) {
    .rooms, .rooms-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }
    .room, .room-box {
        padding: 8px;
        font-size: 13px;
    }
}