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

:root {
    /* Light Theme (Default) */
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --border-color: #e2e8f0;
    --border-color-hover: #cbd5e1;
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --color-primary: #4f46e5; /* Indigo */
    --color-primary-glow: rgba(79, 70, 229, 0.15);
    --color-success: #10b981; /* Emerald */
    --color-success-bg: rgba(16, 185, 129, 0.1);
    --color-warning: #d97706; /* Amber */
    --color-warning-bg: rgba(217, 119, 6, 0.1);
    --color-danger: #dc2626; /* Red */
    --color-danger-bg: rgba(220, 38, 38, 0.1);

    --bg-sidebar: #ffffff;
    --border-sidebar: #e2e8f0;
    --logo-shadow: 0 4px 15px rgba(79, 70, 229, 0.15);

    --font-sans: 'Hind Siliguri', 'Outfit', sans-serif;
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
}

[data-theme="dark"] {
    /* Dark Theme */
    --bg-main: #0B0F19;
    --bg-card: rgba(22, 28, 45, 0.7);
    --bg-card-hover: rgba(30, 39, 63, 0.85);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-hover: rgba(255, 255, 255, 0.15);
    
    --text-primary: #F3F4F6;
    --text-secondary: #9CA3AF;
    --text-muted: #6B7280;

    --color-primary: #6366F1;
    --color-primary-glow: rgba(99, 102, 241, 0.25);
    --color-success: #10B981;
    --color-success-bg: rgba(16, 185, 129, 0.15);
    --color-warning: #F59E0B;
    --color-warning-bg: rgba(245, 158, 11, 0.15);
    --color-danger: #EF4444;
    --color-danger-bg: rgba(239, 68, 68, 0.15);

    --bg-sidebar: rgba(15, 23, 42, 0.8);
    --border-sidebar: rgba(255, 255, 255, 0.08);
    --logo-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
    background-image: 
        radial-gradient(at 0% 0%, var(--color-primary-glow) 0px, transparent 50%),
        radial-gradient(at 100% 100%, var(--color-success-bg) 0px, transparent 50%);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Sidebar Styling */
aside {
    width: 280px;
    background: var(--bg-sidebar);
    backdrop-filter: blur(16px);
    border-right: 1px solid var(--border-sidebar);
    display: flex;
    flex-direction: column;
    padding: 2rem 1.5rem;
    position: fixed;
    height: 100vh;
    left: 0;
    top: 0;
    z-index: 100;
    transition: var(--transition-smooth);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-success));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
    box-shadow: var(--logo-shadow);
    transition: var(--transition-smooth);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-item button {
    width: 100%;
    background: none;
    border: none;
    outline: none;
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition-smooth);
}

.nav-item button:hover {
    color: var(--text-primary);
    background: var(--bg-card-hover);
}

.nav-item.active button {
    color: white;
    background: var(--color-primary);
    box-shadow: 0 4px 15px var(--color-primary-glow);
}

.nav-icon {
    font-size: 1.2rem;
}

/* Main Content Area */
main {
    margin-left: 280px;
    flex: 1;
    padding: 2.5rem;
    max-width: 1600px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
}

.page-title h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 0.25rem;
}

.page-title p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Dashboard Metrics Grid */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.metric-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    padding: 1.75rem;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: var(--transition-smooth);
}

.metric-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-color-hover);
    background: var(--bg-card-hover);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
}

.metric-info h3 {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.metric-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.metric-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.metric-card:nth-child(1) .metric-icon {
    background: rgba(99, 102, 241, 0.15);
    color: var(--color-primary);
}

.metric-card:nth-child(2) .metric-icon {
    background: rgba(16, 185, 129, 0.15);
    color: var(--color-success);
}

.metric-card:nth-child(3) .metric-icon {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-warning);
}

.metric-card:nth-child(4) .metric-icon {
    background: rgba(239, 68, 68, 0.15);
    color: var(--color-danger);
}

/* Tab Content Switcher */
.tab-content {
    display: none;
    animation: fadeIn 0.4s ease-out;
}

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

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

/* Card Panel Layouts */
.panel {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.2);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.panel-title {
    font-size: 1.25rem;
    font-weight: 600;
}

/* Styled Tables */
.table-wrapper {
    overflow-x: auto;
    width: 100%;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th {
    padding: 1rem;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 1.25rem 1rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
}

tr:hover td {
    background: rgba(255, 255, 255, 0.015);
    color: var(--text-primary);
}

/* Status Badges */
.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    display: inline-block;
}

.badge-success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

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

.badge-info {
    background-color: rgba(99, 102, 241, 0.15);
    color: var(--color-primary);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

/* Action Buttons */
.btn {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    border: 1px solid transparent;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-danger {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
    border-color: rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background-color: var(--color-danger);
    color: white;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

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

.btn-primary:hover {
    background-color: #4f46e5;
    box-shadow: 0 4px 12px var(--color-primary-glow);
}

/* Empty States */
.empty-state {
    padding: 3rem;
    text-align: center;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* DB Connection Banner */
.db-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: 2rem;
}

.db-banner-text {
    font-size: 0.95rem;
    color: #F87171;
}

.db-banner-action {
    color: white;
    text-decoration: underline;
    font-weight: 500;
    cursor: pointer;
}

/* Loading Overlay */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 1s ease-in-out infinite;
    margin: 2rem auto;
}

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

/* Responsive details */
@media (max-width: 1024px) {
    aside {
        width: 80px;
        padding: 2rem 0.5rem;
    }
    
    .logo-text, .logo-container span, .nav-item button span {
        display: none;
    }
    
    .logo-container {
        justify-content: center;
        margin-bottom: 2rem;
    }
    
    .nav-item button {
        justify-content: center;
        padding: 0.85rem;
    }
    
    main {
        margin-left: 80px;
        padding: 1.5rem;
    }
}

/* Edit Modals & Form Styling */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(8px);
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: modalFadeIn 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    padding: 2.25rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    animation: modalSlideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-header-title {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 0.8rem 1.1rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
    outline: none;
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.btn-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.05rem;
    transition: var(--transition-smooth);
}

.btn-circle:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-color-hover);
    transform: scale(1.05);
}

.btn-secondary {
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
}

[data-theme="dark"] .btn-secondary {
    background: rgba(255, 255, 255, 0.05);
}

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

.btn-success:hover {
    box-shadow: 0 4px 12px var(--color-success-bg);
    opacity: 0.9;
}

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

@keyframes modalSlideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}