@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Light Mode Variables */
    --primary: #0284c7; /* Sky blue */
    --primary-hover: #0369a1;
    --secondary: #f8fafc;
    --background: #f1f5f9;
    --surface: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;

    --sidebar-bg: #ffffff;
    --sidebar-hover: #f1f5f9;
    --sidebar-active: #e0f2fe;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 12px;
}

[data-theme="dark"] {
    /* Dark Mode Variables */
    --primary: #38bdf8;
    --primary-hover: #0ea5e9;
    --secondary: #1e293b;
    --background: #0f172a;
    --surface: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    
    --sidebar-bg: #1e293b;
    --sidebar-hover: #334155;
    --sidebar-active: #0f172a;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.4);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5), 0 4px 6px -4px rgb(0 0 0 / 0.5);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background);
    color: var(--text-main);
    display: flex;
    min-height: 100vh;
    overflow-x: hidden;
    transition: var(--transition);
}

/* Typography Utilities */
.text-muted { color: var(--text-muted); }
.text-danger { color: var(--danger); }
.text-center { text-align: center; }
.text-xl { font-size: 1.25rem; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    border-radius: 8px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-size: 0.9rem;
}

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

.btn-primary {
    background-color: var(--primary);
    color: #fff;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: var(--shadow-md);
}

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

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

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

.btn-danger:hover {
    background-color: var(--danger);
    color: white;
}
.btn-sm {
    padding: 6px 10px;
    font-size: 0.8rem;
    border-radius: 6px;
}
.btn-icon {
    padding: 8px;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 24px 0;
    z-index: 100;
    transition: var(--transition);
    height: 100vh;
    position: sticky;
    top: 0;
}

.sidebar.closed {
    transform: translateX(-100%);
    position: absolute;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 0 24px 24px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header .logo {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.header-text h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.025em;
}

.header-text p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.menu-toggle-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
    display: none;
}

.nav-links {
    list-style: none;
    padding: 24px 16px;
    flex: 1;
}

.nav-links li {
    margin-bottom: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    text-decoration: none;
    color: var(--text-muted);
    border-radius: 8px;
    font-weight: 500;
    transition: var(--transition);
}

.nav-link i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

.nav-link:hover {
    background-color: var(--sidebar-hover);
    color: var(--text-main);
    transform: translateX(4px);
}

.nav-link.active {
    background-color: var(--sidebar-active);
    color: var(--primary);
}

.divider {
    height: 1px;
    background-color: var(--border);
    margin: 16px 0;
}

.sidebar-footer {
    padding: 16px 24px 0;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-muted);
    text-align: center;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.top-header {
    height: 72px;
    background-color: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    position: sticky;
    top: 0;
    z-index: 90;
    box-shadow: var(--shadow-sm);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

#show-sidebar-btn {
    display: block;
}

.live-clock {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: var(--background);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
    border: 1px solid var(--border);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Theme Switcher */
.theme-switch-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
}

.theme-switch {
    display: inline-block;
    height: 28px;
    position: relative;
    width: 50px;
}

.theme-switch input {
    display: none;
}

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

.slider:before {
    background-color: #fff;
    bottom: 4px;
    content: "";
    height: 20px;
    left: 4px;
    position: absolute;
    transition: .4s;
    width: 20px;
}

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

input:checked + .slider:before {
    transform: translateX(22px);
}

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

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

/* Content Wrapper & SPA Routing */
.content-wrapper {
    padding: 32px;
    flex: 1;
    position: relative;
}

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

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-header {
    margin-bottom: 24px;
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.section-header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}

/* Dashboard Specifics */
.welcome-banner {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    border-radius: var(--radius);
    padding: 40px;
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.welcome-banner::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0) 70%);
    border-radius: 50%;
}

.banner-text h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.banner-text p {
    font-size: 1.05rem;
    opacity: 0.9;
    margin-bottom: 24px;
    max-width: 600px;
}

.banner-img {
    width: 140px;
    height: 140px;
    object-fit: contain;
    filter: drop-shadow(0 10px 15px rgba(0,0,0,0.2));
    z-index: 10;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.b-blue { background: rgba(59, 130, 246, 0.1); color: #3b82f6; }
.b-orange { background: rgba(245, 158, 11, 0.1); color: #f59e0b; }
.b-green { background: rgba(16, 185, 129, 0.1); color: #10b981; }

.stat-details h3 {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 4px;
}

.stat-details p {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-main);
}

.dashboard-charts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.chart-container {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
}

.chart-container h3 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 12px;
}

.breakdown-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.breakdown-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background-color: var(--background);
    border-radius: 6px;
}

.breakdown-item .label {
    font-weight: 500;
}

.breakdown-item .badge {
    background-color: var(--primary);
    color: white;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 700;
}

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group.span-2 {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-main);
}

.required {
    color: var(--danger);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background-color: var(--background);
    color: var(--text-main);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.1);
}

.input-with-icon {
    position: relative;
    display: flex;
    align-items: center;
}

.input-with-icon input {
    width: 100%;
    padding-right: 40px;
}

.input-with-icon i {
    position: absolute;
    right: 16px;
    color: var(--text-muted);
    pointer-events: none;
}

.readonly-input {
    background-color: var(--secondary) !important;
    cursor: not-allowed;
    opacity: 0.8;
}

.form-actions {
    margin-top: 32px;
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    border-top: 1px solid var(--border);
    padding-top: 24px;
}

/* Tables */
.table-tools {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 16px;
}

.search-box {
    position: relative;
    min-width: 300px;
}

.search-box input {
    width: 100%;
    padding: 10px 16px 10px 40px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background-color: var(--background);
    color: var(--text-main);
}

.search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

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

.table-responsive {
    overflow-x: auto;
}

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

th, td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

th {
    background-color: var(--background);
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

tr:hover td {
    background-color: var(--sidebar-hover);
}

.td-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.empty-state {
    text-align: center;
    padding: 48px 0;
}

.empty-img {
    width: 150px;
    margin-bottom: 16px;
    opacity: 0.7;
}

.empty-state p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Settings & About */
.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.setting-info h3 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

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

hr {
    border: none;
    border-top: 1px solid var(--border);
}

.about-header {
    text-align: center;
    margin-bottom: 32px;
}

.about-logo {
    width: 100px;
    margin-bottom: 16px;
}

.about-table {
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.about-table td {
    padding: 12px;
    border: none;
}

.about-table td:first-child {
    width: 150px;
    color: var(--text-muted);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
    animation: fadeInModal 0.3s forwards;
}

@keyframes fadeInModal {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: var(--surface);
    border-radius: var(--radius);
    width: 90%;
    max-width: 400px;
    padding: 24px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
    transform: translateY(20px);
    animation: slideUp 0.3s forwards;
}

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

.modal-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.modal-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.modal-icon.warning {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.modal-body {
    margin-bottom: 24px;
    color: var(--text-muted);
    line-height: 1.5;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

/* Notifications Container */
#notification-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background-color: var(--surface);
    color: var(--text-main);
    padding: 16px 20px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary);
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: 300px;
    animation: slideInRight 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55) forwards;
    cursor: pointer;
}

.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }
.toast.info { border-color: var(--info); }

.toast-icon { font-size: 1.25rem; }
.toast.success .toast-icon { color: var(--success); }
.toast.error .toast-icon { color: var(--danger); }
.toast.info .toast-icon { color: var(--info); }

.toast-content h4 { font-size: 0.95rem; margin-bottom: 4px;}
.toast-content p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

@keyframes slideInRight {
    from { transform: translateX(120%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOutRight {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(120%); opacity: 0; }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .sidebar {
        position: fixed;
        left: 0;
        transform: translateX(-100%);
    }
    .sidebar.open {
        transform: translateX(0);
        box-shadow: 0 0 0 100vw rgba(0,0,0,0.5); /* backdrop hack */
    }
    .menu-toggle-btn {
        display: block;
    }
    #show-sidebar-btn {
        display: block;
    }
}

@media (max-width: 768px) {
    .content-wrapper { padding: 16px; }
    .form-grid { grid-template-columns: 1fr; }
    .welcome-banner { flex-direction: column; text-align: center; padding: 24px; }
    .banner-img { margin-top: 24px; width: 100px; height: 100px; }
    .top-header { padding: 0 16px; }
    .live-clock { display: none; } /* Hide on very small screens to save space */
}