:root {
    /* Color Palette - Light Mode */
    --primary-color: #4361ee;
    /* Vibrant Blue */
    --primary-hover: #3a56d4;
    --secondary-color: #3f37c9;
    /* Indigo */
    --accent-color: #4895ef;
    /* Lighter Blue */

    --bg-color: #F8F9FA;
    --card-bg: #FFFFFF;
    --sidebar-bg: #FFFFFF;

    --text-primary: #2b2d42;
    --text-secondary: #8d99ae;
    --text-muted: #D1D5DB;

    --border-color: #E5E7EB;
    --input-bg: #F3F4F6;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Variables */
body.dark-mode {
    --primary-color: #4361ee;
    --primary-hover: #3a56d4;

    --bg-color: #0f172a;
    /* Slate 900 */
    --card-bg: #1e293b;
    /* Slate 800 */
    --sidebar-bg: #1e293b;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --border-color: #334155;
    --input-bg: #334155;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    transition: var(--transition);
    overflow-x: hidden;
}

.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.sidebar-header {
    padding: 2rem 1.5rem;
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    width: 100%;
}

.logo-icon i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.logo-text h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-text p {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.sidebar-menu {
    padding: 1.5rem 1rem;
    flex: 1;
    overflow-y: auto;
}

.sidebar-menu ul {
    list-style: none;
}

.sidebar-menu li {
    margin-bottom: 0.5rem;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    padding: 0.8rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-weight: 500;
}

.sidebar-menu a i {
    width: 24px;
    margin-right: 10px;
    text-align: center;
}

.sidebar-menu li.active a,
.sidebar-menu a:hover {
    background-color: rgba(67, 97, 238, 0.1);
    color: var(--primary-color);
}

.menu-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 1rem 0;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.avatar {
    width: 40px;
    height: 40px;
    background-color: var(--bg-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.user-info h4 {
    font-size: 0.9rem;
    margin-bottom: 2px;
}

.user-info p {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
    min-width: 0;
    transition: margin-left 0.3s ease;
}

/* Topbar */
.topbar {
    height: 70px;
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    z-index: 99;
    box-shadow: var(--shadow-sm);
}

.toggle-sidebar {
    display: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.page-title h2 {
    font-size: 1.4rem;
    font-weight: 600;
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.datetime {
    text-align: right;
    display: flex;
    flex-direction: column;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

#current-time {
    font-weight: 700;
    color: var(--text-primary);
}

.icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-secondary);
    transition: var(--transition);
}

.icon-btn:hover {
    color: var(--primary-color);
    transform: rotate(15deg);
}

/* Content Area */
#content-area {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

.content-section {
    display: none;
    animation: fadeIn 0.4s ease;
}

.content-section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Welcome Banner */
.welcome-banner {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    padding: 2rem;
    border-radius: var(--radius-md);
    margin-bottom: 2rem;
    box-shadow: 0 10px 20px rgba(67, 97, 238, 0.2);
}

.welcome-banner h1 {
    margin-bottom: 0.5rem;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat-card.highlight {
    border-left: 4px solid var(--primary-color);
}

.icon-box {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.icon-box.blue {
    background-color: rgba(67, 97, 238, 0.1);
    color: #4361ee;
}

.icon-box.purple {
    background-color: rgba(114, 9, 183, 0.1);
    color: #7209b7;
}

.icon-box.orange {
    background-color: rgba(247, 37, 133, 0.1);
    color: #f72585;
}

.icon-box.green {
    background-color: rgba(76, 201, 240, 0.1);
    color: #4cc9f0;
}

.stat-info p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.2rem;
}

.stat-info h3 {
    font-size: 1.5rem;
    font-weight: 700;
}

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

.card {
    background-color: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.card-header h3 {
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-header p {
    margin-top: 0.3rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.card-body {
    padding: 1.5rem;
    flex: 1;
}

.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.7rem 1.5rem;
    border-radius: var(--radius-sm);
    border: none;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    gap: 0.5rem;
    font-size: 0.95rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 10px rgba(67, 97, 238, 0.3);
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-secondary:hover {
    background-color: var(--bg-color);
    color: var(--text-primary);
}

.btn-danger {
    background-color: #ef476f;
    color: white;
}

.btn-danger:hover {
    background-color: #d90429;
}

.btn-warning {
    background-color: #ffd166;
    color: #e36414;
}

.btn-warning:hover {
    background-color: #ffb703;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: rgba(67, 97, 238, 0.05);
}

.btn-block {
    width: 100%;
    display: flex;
    padding: 1rem;
    margin-bottom: 1rem;
    justify-content: flex-start;
}

.action-buttons .btn-icon {
    font-size: 1.5rem;
    margin-right: 1rem;
}

.action-buttons .btn-text {
    text-align: left;
}

.action-buttons .btn-text span {
    display: block;
    font-weight: 600;
}

.action-buttons .btn-text small {
    font-size: 0.8rem;
    opacity: 0.8;
}

/* Forms */
.form-grid {
    display: grid;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

input[type="text"],
input[type="email"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 0.8rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-primary);
    transition: var(--transition);
    font-size: 0.95rem;
    outline: none;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.readonly-input {
    background-color: var(--border-color);
    cursor: not-allowed;
    color: var(--text-muted);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* Table */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
}

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

.table th {
    font-weight: 600;
    color: var(--text-secondary);
    background-color: var(--bg-color);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table td {
    color: var(--text-primary);
    font-size: 0.95rem;
    vertical-align: middle;
}

.table tr:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
}

.search-box {
    position: relative;
    width: 250px;
}

.search-box input {
    padding-left: 2.5rem;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

/* Settings Toggle */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 24px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
}

.slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
}

input:checked+.slider {
    background-color: var(--primary-color);
}

input:checked+.slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.setting-info h4 {
    margin-bottom: 5px;
}

.setting-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* About */
.about-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 3rem;
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.about-logo {
    margin-bottom: 1.5rem;
}

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

.about-details {
    text-align: left;
    background-color: var(--bg-color);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: 2rem;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    padding: 0.8rem 0;
}

.detail-item:last-child {
    border-bottom: none;
}

.footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .toggle-sidebar {
        display: block;
    }

    .form-group-row {
        grid-template-columns: 1fr;
    }
}

/* =========================================
   ENHANCED LOGIN UI (Final Polish)
   ========================================= */

#login-page {
    background: linear-gradient(135deg, #f0f4f8 0%, #d9e2ec 100%);
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    padding: 1rem;
    /* Ensure spacing on small screens */
}

/* Dynamic Background Shapes */
#login-page::before {
    content: '';
    position: absolute;
    top: -150px;
    right: -150px;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(67, 97, 238, 0.2) 0%, rgba(67, 97, 238, 0) 70%);
    border-radius: 50%;
    z-index: -1;
}

#login-page::after {
    content: '';
    position: absolute;
    bottom: -150px;
    left: -150px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(72, 149, 239, 0.2) 0%, rgba(72, 149, 239, 0) 70%);
    border-radius: 50%;
    z-index: -1;
}

.login-card {
    background: #ffffff;
    /* Clean white background */
    width: 100%;
    max-width: 400px;
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.1);
    text-align: center;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(5px);
}

.login-header {
    margin-bottom: 2rem;
}

.login-header i {
    text-shadow: 0 4px 10px rgba(67, 97, 238, 0.3);
    margin-bottom: 1rem !important;
    display: inline-block;
}

.login-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 0.25rem;
}

.login-header p {
    color: #718096;
    font-size: 0.95rem;
}

.login-body {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.btn-login {
    width: 100%;
    padding: 1rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

.btn-login.admin {
    background: var(--primary-color);
    color: #fff;
    box-shadow: 0 4px 6px -1px rgba(67, 97, 238, 0.4);
}

.btn-login.admin:active {
    transform: translateY(1px);
    box-shadow: 0 2px 4px -1px rgba(67, 97, 238, 0.4);
}

.btn-login.viewer {
    background: #f7fafc;
    color: #4a5568;
    border: 1px solid #e2e8f0;
}

.btn-login.viewer:hover {
    background: #edf2f7;
    color: #1a202c;
}

#admin-password-input {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #edf2f7;
    animation: fadeIn 0.3s ease;
}

#admin-password-input input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.2s;
    outline: none;
    margin-bottom: 1rem;
}

#admin-password-input input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =========================================
   RESPONSIVE DESIGN (MOBILE)
   ========================================= */
@media (max-width: 480px) {
    .login-card {
        padding: 2rem 1.5rem;
        width: 100%;
        max-width: 100%;
        border-radius: 16px;
    }

    .login-header h2 {
        font-size: 1.5rem;
    }

    .login-header i.fa-3x {
        font-size: 2.5em;
    }

    .btn-login {
        padding: 0.875rem;
    }
}