/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Segoe UI', sans-serif;
}

:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --surface-50: #f8fafc;
    --surface-100: #f1f5f9;
    --surface-200: #e2e8f0;
    --surface-300: #cbd5e1;
    --surface-600: #475569;
    --surface-700: #334155;
    --surface-800: #1e293b;
    --surface-900: #0f172a;
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
}

body {
    background-color: var(--surface-50);
    color: var(--surface-800);
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    color: var(--surface-900);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--primary-hover);
}

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

.sidebar {
    width: 260px;
    background: white;
    border-right: 1px solid var(--surface-200);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.sidebar-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    color: var(--surface-600);
    font-weight: 500;
    transition: all 0.2s;
}

.nav-item:hover, .nav-item.active {
    background: var(--surface-100);
    color: var(--primary);
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--surface-50);
}

.topbar {
    height: 70px;
    background: white;
    border-bottom: 1px solid var(--surface-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
}

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

.content-area {
    padding: 2rem;
    flex: 1;
    overflow-y: auto;
}

/* UI Components */
.card {
    background: white;
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--surface-100);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.875rem;
    gap: 0.5rem;
}

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

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

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

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

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

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--surface-700);
    margin-bottom: 0.5rem;
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--surface-300);
    background: white;
    color: var(--surface-800);
    font-size: 0.875rem;
    transition: all 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Auth Page */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--surface-50) 0%, var(--surface-200) 100%);
    padding: 1rem;
}

.auth-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 1.5rem;
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

/* Dashboard Grid */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.kpi-card {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.kpi-value {
    font-size: 2rem;
    font-weight: 800;
    margin-top: 0.25rem;
}

.kpi-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--surface-600);
    font-weight: 600;
}

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

.animate-fade-in {
    animation: fadeIn 0.4s ease-out forwards;
}

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

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

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--surface-200);
}

th {
    font-weight: 600;
    color: var(--surface-600);
    font-size: 0.875rem;
    background: var(--surface-50);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-blue { background: #dbeafe; color: #1e40af; }
.badge-green { background: #d1fae5; color: #065f46; }
.badge-red { background: #fee2e2; color: #991b1b; }
.badge-yellow { background: #fef3c7; color: #92400e; }

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    z-index: 1000;
    padding: 4rem 1rem 1rem 1rem;
}

.modal-content {
    background: white;
    border-radius: 1rem;
    padding: 2rem;
    width: 100%;
    max-width: 500px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    max-height: 90vh;
    overflow-y: auto;
}

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

.modal-header h3 {
    font-size: 1.125rem;
}

.btn-icon {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 0.375rem;
    color: var(--surface-600);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.btn-icon:hover {
    background: var(--surface-100);
}