:root {
    /* Premium Light Theme Palette */
    --bg-primary: #f1f5f9;
    --bg-secondary: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.7);
    --border-color: rgba(15, 23, 42, 0.08);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --primary-color: #4f46e5; /* Indigo */
    --primary-hover: #4338ca;
    
    --accent-color: #f59e0b;
    --accent-hover: #d97706;
    
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    
    /* Layout */
    --sidebar-width: 260px;
    --header-height: 70px;
    
    /* Effects */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    
    --radius-md: 0.75rem;
    --radius-lg: 1.25rem;
    --radius-xl: 1.75rem;
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
}

/* Glassmorphism Utilities */
.glass-panel {
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.text-gradient {
    background: linear-gradient(135deg, #60a5fa, #c084fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Auth Pages (Login) */
.auth-container {
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top right, #e2e8f0, #f8fafc);
    padding: 1rem;
}

.login-card {
    width: 100%;
    max-width: 400px;
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.login-header {
    text-align: center;
}

.login-header h1 {
    font-size: 1.875rem;
    margin-bottom: 0.5rem;
}

/* Forms */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.form-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 0.875rem 1.25rem;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
    transform: translateY(-1px);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    gap: 0.5rem;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

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

.btn-accent:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

/* Layout - App */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 50;
    transition: transform 0.3s ease;
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.nav-links {
    padding: 1.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex-grow: 1;
    overflow-y: auto;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1rem;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-bounce);
}

.nav-link:hover {
    background-color: rgba(79, 70, 229, 0.05);
    color: var(--primary-color);
    transform: translateX(4px);
}

.nav-link.active {
    background-color: var(--primary-color);
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
}

.nav-link i {
    width: 20px;
    text-align: center;
}

.main-content {
    flex-grow: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.topbar {
    height: var(--header-height);
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    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: 40;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.content-area {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* Dashboard Cards */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: #ffffff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition-bounce);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.stat-value.success { color: var(--success); }
.stat-value.danger { color: var(--danger); }
.stat-value.warning { color: var(--warning); }

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

table {
    width: 100%;
    border-collapse: collapse;
    background: #ffffff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

th, td {
    padding: 1.25rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background-color: #f8fafc;
}

tr {
    transition: var(--transition);
}

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

tr:hover td {
    background-color: #f1f5f9;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    width: 100%;
    max-width: 500px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    transform: translateY(20px);
    transition: var(--transition);
    max-height: 90vh;
    overflow-y: auto;
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

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

.modal-body {
    padding: 1.5rem;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.25rem;
}

/* Badges */
.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}
.badge-success { background: rgba(16, 185, 129, 0.2); color: var(--success); }
.badge-danger { background: rgba(239, 68, 68, 0.2); color: var(--danger); }
.badge-warning { background: rgba(245, 158, 11, 0.2); color: var(--warning); }

/* Responsive */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .sidebar {
        top: auto;
        bottom: 0;
        width: 100%;
        height: 70px;
        flex-direction: row;
        border-right: none;
        border-top: 1px solid var(--border-color);
        box-shadow: 0 -4px 10px rgba(0,0,0,0.05);
        z-index: 100;
        padding: 0 0.5rem;
        transform: none; /* Override old transform */
    }
    
    .sidebar-header {
        display: none;
    }
    
    .nav-links {
        flex-direction: row;
        justify-content: space-around;
        align-items: center;
        padding: 0;
        overflow: visible;
        width: 100%;
    }
    
    .nav-link {
        flex-direction: column;
        gap: 0.25rem;
        padding: 0.5rem;
        font-size: 0.65rem;
        border-radius: 0;
        color: var(--text-muted);
    }
    
    .nav-link i {
        font-size: 1.25rem;
    }
    
    .nav-link span {
        /* Hide text on very small screens, or keep very small */
        display: block;
        text-align: center;
    }
    
    .nav-link:hover, .nav-link.active {
        background-color: transparent;
        color: var(--primary-color);
        transform: none;
        box-shadow: none;
    }
    
    .nav-link.active i {
        transform: scale(1.1);
    }
    
    .hide-mobile {
        display: none !important;
    }
    
    .sidebar-divider, .sidebar-footer {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
        margin-bottom: 70px; /* Space for bottom nav */
    }
    
    .topbar {
        padding: 0 1rem;
    }
    
    .menu-toggle {
        display: none; /* No hamburger needed with bottom nav */
    }
    
    .content-area {
        padding: 1rem;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    /* Responsive Table to Cards */
    table, thead, tbody, th, td, tr {
        display: block;
    }
    
    thead tr {
        position: absolute;
        top: -9999px;
        left: -9999px;
    }
    
    tr {
        border: 1px solid var(--border-color);
        margin-bottom: 1rem;
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        background: #fff;
    }
    
    td {
        border: none;
        border-bottom: 1px solid #eee;
        position: relative;
        padding-left: 40%;
        text-align: right;
        min-height: 3rem;
        display: flex;
        align-items: center;
        justify-content: flex-end;
    }
    
    td:before {
        content: attr(data-label);
        position: absolute;
        left: 1rem;
        width: 35%;
        padding-right: 10px;
        white-space: nowrap;
        font-weight: 600;
        text-align: left;
        color: var(--text-secondary);
        font-size: 0.75rem;
        text-transform: uppercase;
    }
}