:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --radius: 0.75rem;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.6;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Manrope', sans-serif;
    font-weight: 700;
}

h1 { font-size: 1.875rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }

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

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--primary);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
}

.sidebar-header {
    padding: 1.25rem;
    border-bottom: 1px solid var(--primary-light);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-logo {
    width: 32px;
    height: 32px;
    background: var(--accent);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-title {
    font-size: 1.125rem;
    font-weight: 700;
}

.sidebar-nav {
    padding: 1rem 0.75rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--gray-400);
    text-decoration: none;
    border-radius: 0.5rem;
    margin-bottom: 0.25rem;
    transition: all 0.2s;
}

.nav-item:hover {
    color: white;
    background: var(--primary-light);
}

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

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

.sidebar-user {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    border-top: 1px solid var(--primary-light);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--gray-700);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: white;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-email {
    font-size: 0.75rem;
    color: var(--gray-500);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
}

.topbar {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.content {
    padding: 2rem;
}

/* Cards */
.card {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.card-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-body {
    padding: 1.5rem;
}

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

.stat-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-icon.blue { background: #dbeafe; color: var(--accent); }
.stat-icon.orange { background: #ffedd5; color: #ea580c; }
.stat-icon.green { background: #dcfce7; color: #16a34a; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-light);
}

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

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

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

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

.btn-outline {
    background: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-700);
}

.btn-outline:hover {
    background: var(--gray-100);
}

.btn-ghost {
    background: transparent;
    color: var(--gray-600);
}

.btn-ghost:hover {
    background: var(--gray-100);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

/* Forms */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.375rem;
}

.form-input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    border: 1px solid var(--gray-300);
    border-radius: 0.5rem;
    transition: all 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input::placeholder {
    color: var(--gray-400);
}

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

.table th {
    padding: 0.75rem 1rem;
    text-align: left;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--gray-500);
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.table td {
    padding: 0.875rem 1rem;
    font-size: 0.875rem;
    color: var(--gray-700);
    border-bottom: 1px solid var(--gray-100);
}

.table tr:hover td {
    background: var(--gray-50);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 9999px;
    border: 1px solid;
}

.badge-blue {
    background: #dbeafe;
    color: #1d4ed8;
    border-color: #bfdbfe;
}

.badge-orange {
    background: #ffedd5;
    color: #c2410c;
    border-color: #fed7aa;
}

.badge-green {
    background: #dcfce7;
    color: #15803d;
    border-color: #bbf7d0;
}

/* Modal */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s;
}

.modal-backdrop.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: white;
    border-radius: var(--radius);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95);
    transition: all 0.2s;
}

.modal-backdrop.active .modal {
    transform: scale(1);
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-400);
    cursor: pointer;
    line-height: 1;
}

.modal-close:hover {
    color: var(--gray-600);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--gray-200);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    transition: all 0.2s;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--gray-400);
    background: var(--gray-50);
}

.upload-area.dragover {
    border-color: var(--accent);
    background: #dbeafe;
}

.upload-area.has-file {
    border-color: var(--success);
    background: #dcfce7;
}

.upload-icon {
    font-size: 2.5rem;
    color: var(--gray-400);
    margin-bottom: 0.75rem;
}

.upload-text {
    color: var(--gray-600);
    margin-bottom: 0.5rem;
}

.upload-hint {
    font-size: 0.875rem;
    color: var(--gray-400);
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.alert-warning {
    background: #fef3c7;
    border: 1px solid #fcd34d;
    color: #92400e;
}

.alert-success {
    background: #dcfce7;
    border: 1px solid #86efac;
    color: #166534;
}

.alert-error {
    background: #fee2e2;
    border: 1px solid #fca5a5;
    color: #991b1b;
}

/* Grid */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

/* Logo Preview */
.logo-preview {
    width: 40px;
    height: 40px;
    object-fit: contain;
    border-radius: 4px;
    border: 1px solid var(--gray-200);
}

.logo-placeholder {
    width: 40px;
    height: 40px;
    background: var(--gray-100);
    border-radius: 4px;
    border: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-400);
}

/* Auth Pages */
.auth-container {
    min-height: 100vh;
    display: flex;
}

.auth-left {
    flex: 1;
    background: var(--primary);
    color: white;
    padding: 3rem;
    display: none;
    flex-direction: column;
    justify-content: space-between;
}

@media (min-width: 1024px) {
    .auth-left {
        display: flex;
    }
}

.auth-right {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.auth-card {
    width: 100%;
    max-width: 400px;
}

.auth-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.auth-title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.auth-subtitle {
    color: var(--gray-500);
    margin-bottom: 2rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--gray-500);
}

.empty-icon {
    font-size: 3rem;
    color: var(--gray-300);
    margin-bottom: 1rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
}

/* Utilities */
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-mono { font-family: 'JetBrains Mono', monospace; }
.font-bold { font-weight: 700; }
.text-blue { color: var(--accent); }
.text-muted { color: var(--gray-500); }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.gap-2 { gap: 0.5rem; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }