:root {
    --bg-dark: #0f172a;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --neon-blue: #38bdf8;
    --neon-purple: #c084fc;
    --danger: #ef4444;
    --success: #22c55e;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(56, 189, 248, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(192, 132, 252, 0.15), transparent 25%);
    background-attachment: fixed;
}

.login-body {
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.glass-container {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
}

.login-box {
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.neon-text {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--neon-blue), var(--neon-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.input-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.input-group input, .input-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.input-group input:focus, .input-group select:focus {
    border-color: var(--neon-blue);
}

.btn-primary {
    width: 100%;
    padding: 0.75rem;
    background: linear-gradient(135deg, var(--neon-blue), var(--neon-purple));
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.3s ease, transform 0.1s ease;
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-primary:active {
    transform: scale(0.98);
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}

.alert.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Dashboard Layout */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--glass-bg);
    border-bottom: 1px solid var(--glass-border);
    position: relative;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 100;
}
.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: 0.3s;
}

.navbar .nav-links {
    display: flex;
    align-items: center;
}

.navbar .nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 1.5rem;
    font-weight: 500;
    transition: color 0.3s;
}

.navbar .nav-links a:hover {
    color: var(--text-primary);
}

.main-content {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    flex-grow: 1;
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

/* Status Items */
.status-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--glass-border);
}
.status-item:last-child {
    border-bottom: none;
}

.status-info h3 {
    font-size: 1rem;
    font-weight: 600;
}
.status-info p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
    flex-shrink: 0;
}
.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}
.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255,255,255,0.1);
    transition: .4s;
    border-radius: 34px;
}
.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: var(--danger);
    transition: .4s;
    border-radius: 50%;
}
input:checked + .slider {
    background-color: rgba(34, 197, 94, 0.2);
}
input:checked + .slider:before {
    transform: translateX(22px);
    background-color: var(--success);
}

/* Schedule Table */
.schedule-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.schedule-table th, .schedule-table td {
    padding: 1rem 0.5rem;
    text-align: left;
    border-bottom: 1px solid var(--glass-border);
}

.schedule-table th {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    padding: 1rem;
}
.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}
.modal-content {
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.session-row {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    align-items: center;
}
.session-row input {
    width: 100%;
    flex: 1;
}
.btn-remove {
    background: none;
    border: none;
    color: var(--danger);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0 0.5rem;
}

.btn-secondary {
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: white;
    cursor: pointer;
    transition: background 0.3s;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    .navbar .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--glass-bg);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        flex-direction: column;
        align-items: flex-start;
        padding: 1rem 2rem;
        gap: 1rem;
        border-bottom: 1px solid var(--glass-border);
        display: none; /* hidden by default */
        z-index: 99;
    }
    .navbar .nav-links.active {
        display: flex;
    }
    .navbar .nav-links a {
        margin-left: 0;
        width: 100%;
        padding: 0.5rem 0;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
        padding: 1rem 0;
    }
    
    .main-content {
        padding: 1rem;
    }
    .card {
        padding: 1rem;
    }
    .glass-container {
        padding: 1.5rem;
    }
    
    /* Make table more compact on mobile */
    .schedule-table td {
        padding: 0.75rem 0.25rem;
    }
    .schedule-table td:first-child {
        font-weight: 600;
        color: var(--neon-blue);
        width: 40%;
    }
    .schedule-table td select {
        width: 100%;
        padding: 0.5rem;
        font-size: 0.875rem;
    }
    
    .schedule-table-hp td:first-child {
        color: var(--neon-purple) !important;
    }
}