:root {
    --bg: #09090b;
    /* Deep pitch dark */
    --sidebar: rgba(15, 23, 42, 0.4);
    /* Glassmorphic sidebar */
    --card: rgba(255, 255, 255, 0.03);
    /* Glass cards */
    --card-hover: rgba(255, 255, 255, 0.05);
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #38bdf8;
    /* Sleek vibrant cyan/blue */
    --primary-glow: rgba(56, 189, 248, 0.4);
    --border: rgba(255, 255, 255, 0.08);
    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.4);
    --success: #10b981;
    --success-glow: rgba(16, 185, 129, 0.4);
    --warning: #f59e0b;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'Outfit', -apple-system, sans-serif;
    background: var(--bg);
    background-image:
        radial-gradient(circle at 15% 50%, rgba(56, 189, 248, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 85% 30%, rgba(139, 92, 246, 0.03) 0%, transparent 50%);
    color: var(--text);
    display: flex;
    height: 100vh;
    overflow: hidden;
    letter-spacing: 0.3px;
}

h1,
h2,
h3,
h4 {
    font-weight: 600;
    margin: 0;
}

/* Modal / Auth */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.4s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.modal-content {
    background: #111827;
    padding: 2.5rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8), 0 0 0 1px var(--border);
    width: 340px;
    transform: translateY(20px);
    animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideUp {
    to {
        transform: translateY(0);
    }
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-5px);
    }

    75% {
        transform: translateX(5px);
    }
}

.shake {
    animation: shake 0.2s ease-in-out 0s 2;
}

.modal-content input,
.modal-content select {
    width: 100%;
    padding: 1rem;
    margin-bottom: 1.5rem;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    color: white;
    border-radius: 8px;
    box-sizing: border-box;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    font-family: 'Outfit', sans-serif;
}

.modal-content input:focus,
.modal-content select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 15px var(--primary-glow);
}

.hidden {
    display: none !important;
}

/* Layout */
#app-content {
    display: flex;
    width: 100%;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--sidebar);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-right: 1px solid var(--border);
    color: white;
    padding: 2rem 0;
    display: flex;
    flex-direction: column;
}

.sidebar h2 {
    margin-left: 2rem;
    margin-bottom: 2.5rem;
    font-size: 1.4rem;
    color: #fff;
    letter-spacing: 1px;
    font-weight: 700;
    text-transform: uppercase;
    background: linear-gradient(90deg, #fff, var(--text-muted));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-links li {
    padding: 1.25rem 2rem;
    cursor: pointer;
    border-left: 3px solid transparent;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 1.05rem;
    color: var(--text-muted);
}

.nav-links li:hover {
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.05) 0%, transparent 100%);
    color: #fff;
    padding-left: 2.5rem;
    /* Slide effect */
}

.nav-links li.active {
    background: linear-gradient(90deg, rgba(56, 189, 248, 0.1) 0%, transparent 100%);
    border-left-color: var(--primary);
    color: var(--primary);
    font-weight: 600;
}

.badge {
    background: var(--danger);
    box-shadow: 0 0 10px var(--danger-glow);
    color: white;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

/* Main Content Area */
.content {
    flex: 1;
    padding: 2.5rem 3.5rem;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.content::-webkit-scrollbar {
    width: 6px;
}

.content::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1.5rem;
    margin-bottom: 2.5rem;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
}

/* Buttons */
.btn {
    background: var(--primary);
    color: #0f172a;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 4px 14px 0 var(--primary-glow);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(56, 189, 248, 0.6);
}

.btn:active {
    transform: scale(0.95);
}

.btn.loading {
    position: relative;
    pointer-events: none;
    color: transparent !important;
}

.btn.loading::after {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-top: -10px;
    margin-left: -10px;
    border: 2px solid rgba(15, 23, 42, 0.3);
    border-top-color: #0f172a;
    border-radius: 50%;
    animation: button-spin 0.8s linear infinite;
}

@keyframes button-spin {
    to {
        transform: rotate(360deg);
    }
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
    box-shadow: none;
}

.btn-outline:hover {
    background: rgba(56, 189, 248, 0.1);
    box-shadow: 0 0 15px var(--primary-glow);
}

input[type="date"],
input[type="month"] {
    padding: 0.75rem;
    background: #111827;
    color: white;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: 'Outfit', sans-serif;
    outline: none;
    transition: 0.3s ease;
}

input[type="date"]:focus,
input[type="month"]:focus {
    border-color: var(--primary);
}

/* Floating Grid Cards (CRED Style) */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
    perspective: 1000px;
}

.metric-card {
    background: var(--card);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Inner Glow line on top */
.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), transparent);
    opacity: 0.7;
}

.metric-card.warning::before {
    background: linear-gradient(90deg, var(--danger), transparent);
}

.metric-card:hover {
    transform: translateY(-8px) scale(1.02);
    background: var(--card-hover);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 20px rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.15);
}

.metric-card.warning:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 20px var(--danger-glow);
    border-color: var(--danger);
}

.metric-card h3 {
    margin: 0 0 0.75rem 0;
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 1px;
}

.metric-card .number {
    margin: 0;
    font-size: 2.75rem;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(180deg, #ffffff, #a1a1aa);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Devices Grid */
.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.device-card {
    background: var(--card);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.device-card:hover {
    transform: translateX(5px);
    background: var(--card-hover);
    border-color: rgba(255, 255, 255, 0.1);
}

.device-info h4 {
    margin: 0 0 0.5rem 0;
    font-size: 1.25rem;
    font-weight: 500;
    color: #fff;
}

.device-info p {
    margin: 0.25rem 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.device-card.offline {
    border-color: rgba(239, 68, 68, 0.3);
    background: rgba(239, 68, 68, 0.05);
}

/* Tables */
.table-container {
    background: var(--card);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow-x: auto;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* Custom Scrollbar to make horizontal scrolling obvious */
.table-container::-webkit-scrollbar {
    height: 10px;
}

.table-container::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 0 0 12px 12px;
}

.table-container::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 10px;
}

.table-container::-webkit-scrollbar-thumb:hover {
    background: #0ea5e9;
    /* Slightly darker shade of primary */
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    min-width: 900px;
}

.data-table th,
.data-table td {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    background: rgba(0, 0, 0, 0.2);
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.data-table tr {
    transition: background 0.2s ease;
}

.data-table tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

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

.status-tag,
.badge.bg-success,
.badge.bg-danger,
.badge.bg-warning,
.badge.bg-primary {
    padding: 0.35rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    width: auto;
    height: auto;
    display: inline-block;
}

.badge {
    margin: 0;
}

.bg-success,
.status-tag.on_time {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.1);
}

.bg-danger,
.status-tag.absent {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.bg-warning,
.status-tag.late {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

/* Custom form labels */
label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    body {
        height: auto;
        overflow: auto;
    }

    #app-content {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        padding: 1.5rem 0 0 0;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

    .sidebar h2 {
        margin-left: 0;
        text-align: center;
        margin-bottom: 1rem;
    }

    .nav-links {
        display: flex;
        overflow-x: auto;
        white-space: nowrap;
        padding-bottom: 0px;
    }

    .nav-links::-webkit-scrollbar {
        height: 0;
        display: none;
    }

    .nav-links li {
        padding: 1rem 1.5rem;
        border-left: none;
        border-bottom: 3px solid transparent;
        transition: none;
    }

    .nav-links li:hover {
        padding: 1rem 1.5rem;
        /* Prevent layout shift on hover */
        background: transparent;
    }

    .nav-links li.active {
        border-left-color: transparent;
        border-bottom-color: var(--primary);
        background: transparent;
    }

    .content {
        padding: 1.5rem 1rem;
        overflow-y: visible;
    }

    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .metrics-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .devices-grid {
        grid-template-columns: 1fr;
    }

    .table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    header div {
        display: flex;
        flex-direction: column;
        width: 100%;
        gap: 0.5rem;
    }

    header button,
    header a.btn {
        width: 100%;
        text-align: center;
        box-sizing: border-box;
    }
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-switch .slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(239, 68, 68, 0.2);
    border: 1px solid var(--danger);
    transition: .4s;
    border-radius: 24px;
}

.toggle-switch .slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: var(--danger);
    transition: .4s;
    border-radius: 50%;
}

.toggle-switch input:checked+.slider {
    background-color: rgba(16, 185, 129, 0.2);
    border-color: var(--success);
}

.toggle-switch input:checked+.slider:before {
    transform: translateX(20px);
    background-color: var(--success);
}