@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    /* Primary Brand - Modern Indigo */
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-soft: rgba(99, 102, 241, 0.1);
    
    /* Semantic Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #0ea5e9;
    
    /* Neutral Palette - Slate Based */
    --bg-app: #f8fafc;
    --bg-card: #ffffff;
    --sidebar: #0f172a;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #f1f5f9;
    
    /* Effects */
    --shadow-subtle: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --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 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-app);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Base Layout */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar - Compact Professional */
.sidebar {
    width: 280px;
    flex-shrink: 0;
    background: var(--sidebar);
    color: #f8fafc;
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: sticky;
    top: 0;
    border-right: 1px solid rgba(255, 255, 255, 0.05);
    padding: 1.5rem 1rem;
    z-index: 50;
    overflow-y: auto;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar.collapsed {
    width: 80px;
    padding: 1.5rem 0.75rem;
}

.sidebar.collapsed .sidebar-logo span,
.sidebar.collapsed .nav-link span,
.sidebar.collapsed .nav-section-title {
    display: none;
}

.sidebar.collapsed .sidebar-logo,
.sidebar.collapsed .nav-link {
    justify-content: center;
    padding: 0.75rem;
}

.sidebar.collapsed .nav-link i {
    margin: 0;
    font-size: 1.25rem;
}

.main-content {
    flex-grow: 1;
    padding: 1.25rem 1.75rem;
    min-width: 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-section-title {
    font-size: 0.65rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.3);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin: 1.5rem 0.75rem 0.75rem 0.75rem;
}

.sidebar::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
}

/* Topbar Styles */
.topbar {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    height: 72px;
    display: flex;
    align-items: center;
    padding: 0 2rem;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 40;
    margin: -1.25rem -1.75rem 2rem -1.75rem;
    transition: all 0.3s ease;
}

.topbar-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.75rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.topbar-user:hover {
    background: white;
    border-color: var(--border);
    box-shadow: var(--shadow-subtle);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.375rem;
    font-weight: 800;
    color: white;
    text-decoration: none;
    margin-bottom: 2.5rem;
    padding-left: 0.5rem;
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    padding: 0.625rem 0.875rem;
    color: #94a3b8;
    text-decoration: none;
    border-radius: 0.625rem;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover, .nav-link.active {
    background: rgba(255, 255, 255, 0.05);
    color: white;
}

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

/* Main Content Area - Compact */
.main-content {
    flex-grow: 1;
    min-width: 0;
    padding: 1.25rem 1.75rem;
    background: #fdfdfd;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.75rem;
}

.page-title {
    font-size: 1.375rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    color: #0f172a;
}

/* Form Elements - Premium Compact */
.form-input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border-radius: 0.5rem;
    border: 1.5px solid #e2e8f0;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-main);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    background: white;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-soft);
}

label {
    display: block;
    margin-bottom: 0.375rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: #475569;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

/* Components - Compact */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-subtle);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    font-weight: 700;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 2px 4px rgba(99, 102, 241, 0.2);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
}

.btn-ghost:hover {
    background: var(--bg-app);
    color: var(--text-main);
}

/* Modal System - Glassmorphism */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 100;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.2s ease-out;
}

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

.modal-content {
    background: white;
    width: 100%;
    margin: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.5);
    animation: slideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

/* Dashboard Specifics */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2.5rem;
}

.stat-card {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.05em;
}

/* Badge System */
.badge {
    padding: 0.25rem 0.625rem;
    border-radius: 4px;
    font-size: 0.65rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Switch Component */
.switch {
    position: relative;
    display: inline-block;
    width: 38px;
    height: 20px;
}

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

.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: #e2e8f0;
    transition: .3s;
    border-radius: 20px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 14px;
    width: 14px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .3s;
    border-radius: 50%;
}

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

input:checked + .slider:before {
    transform: translateX(18px);
}