/**
 * Main stylesheet for the API Management System
 * Modern, clean design with dark gray color scheme
 */

:root {
    --primary-color: #374151;
    --primary-dark: #1f2937;
    --primary-light: #4b5563;
    --secondary-color: #6b7280;
    --success-color: #059669;
    --danger-color: #dc2626;
    --warning-color: #d97706;
    --info-color: #0ea5e9;
    --background-color: #f9fafb;
    --surface-color: #ffffff;
    --text-color: #374151;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.15);
}

* {
    box-sizing: border-box;
}

body {
    background: #f3f4f6;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    color: var(--text-color);
    line-height: 1.6;
}

/* Layout Components */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.main-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.content-wrapper {
    flex: 1;
    padding: 20px 0;
}

/* Login Page Specific */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 20px;
}

.login-container {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    overflow: hidden;
    max-width: 450px;
    width: 100%;
    margin: 0 auto;
}

.login-header {
    background: var(--primary-color);
    color: white;
    padding: 30px;
    text-align: center;
}

.login-header h3 {
    margin: 0 0 8px;
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

.login-header p {
    margin: 0;
    opacity: 0.9;
    font-size: 0.95rem;
    font-weight: 400;
}

.form-container {
    padding: 40px;
}

/* Main Dashboard Layout */
.dashboard-container {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    margin: 20px 0;
}

.page-header {
    background: var(--primary-color);
    color: white;
    padding: 20px 30px;
    border-radius: 12px 12px 0 0;
}

.page-header h1 {
    margin: 0;
    font-size: 1.75rem;
    font-weight: 700;
}

.page-header p {
    margin: 5px 0 0;
    opacity: 0.9;
    font-size: 0.95rem;
}

.page-content {
    padding: 30px;
}

/* Navigation */
.navbar {
    background: var(--primary-color);
    padding: 15px 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.nav-brand {
    color: white;
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 600;
}

.nav-brand:hover {
    color: white;
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 20px;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: white;
    background: rgba(255, 255, 255, 0.1);
}

/* Sidebar */
.sidebar {
    background: white;
    min-height: calc(100vh - 76px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.sidebar .nav-link {
    color: var(--text-color);
    border-radius: 8px;
    margin: 2px 0;
    padding: 12px 16px;
    transition: all 0.2s ease;
}

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

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

/* Forms */
.form-group {
    position: relative;
    margin-bottom: 24px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.875rem;
    letter-spacing: 0.025em;
}

.form-label i {
    color: var(--primary-color);
    margin-right: 8px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    background: #ffffff;
    color: var(--text-color);
    outline: none;
    transition: border-color 0.2s ease;
}

.form-control:focus {
    border-color: var(--primary-color);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-control:disabled {
    background: #f9fafb;
    color: var(--text-muted);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.025em;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    color: white;
    text-decoration: none;
}

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

.btn-secondary:hover {
    background: #4b5563;
    color: white;
    text-decoration: none;
}

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

.btn-success:hover {
    background: #047857;
    color: white;
    text-decoration: none;
}

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

.btn-danger:hover {
    background: #b91c1c;
    color: white;
    text-decoration: none;
}

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

.btn-warning:hover {
    background: #b45309;
    color: white;
    text-decoration: none;
}

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

.btn-info:hover {
    background: #0284c7;
    color: white;
    text-decoration: none;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

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

.btn-sm {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.125rem;
}

.btn-block {
    width: 100%;
}

/* Alerts */
.alert {
    border-radius: 8px;
    border: none;
    padding: 12px 16px;
    margin-bottom: 24px;
    font-weight: 500;
    display: flex;
    align-items: center;
}

.alert i {
    margin-right: 8px;
}

.alert-danger {
    background: #fef2f2;
    color: var(--danger-color);
    border: 2px solid #fecaca;
    border-left: 4px solid var(--danger-color);
}

.alert-success {
    background: #ecfdf5;
    color: var(--success-color);
    border: 2px solid #a7f3d0;
    border-left: 4px solid var(--success-color);
}

.alert-warning {
    background: #fffbeb;
    color: var(--warning-color);
    border: 2px solid #fed7aa;
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background: #f0f9ff;
    color: var(--info-color);
    border: 2px solid #bae6fd;
    border-left: 4px solid var(--info-color);
}

/* Tables */
.table-container {
    background: white;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    margin: 20px 0;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin: 0;
}

.table th,
.table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    background: #f9fafb;
    font-weight: 600;
    color: var(--text-color);
}

.table tbody tr:hover {
    background: #f9fafb;
}

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

/* Cards */
.card {
    background: white;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    margin: 20px 0;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    background: #f9fafb;
}

.card-header h3 {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    background: #f9fafb;
}

/* Utilities */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-muted {
    color: var(--text-muted);
}

.text-primary {
    color: var(--primary-color);
}

.text-success {
    color: var(--success-color);
}

.text-danger {
    color: var(--danger-color);
}

.text-warning {
    color: var(--warning-color);
}

.text-info {
    color: var(--info-color);
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.d-flex { display: flex; }
.justify-content-between { justify-content: space-between; }
.justify-content-center { justify-content: center; }
.align-items-center { align-items: center; }
.flex-wrap { flex-wrap: wrap; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 1rem; }

/* Footer */
.footer-text {
    text-align: center;
    margin-top: 30px;
}

.footer-text small {
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
    
    .login-header {
        padding: 20px;
    }
    
    .form-container {
        padding: 30px 20px;
    }
    
    .login-header h3 {
        font-size: 1.5rem;
    }
    
    .page-content {
        padding: 20px;
    }
    
    .nav-links {
        flex-direction: column;
        gap: 5px;
    }
    
    .table-container {
        overflow-x: auto;
    }
}

/* Focus visible for accessibility */
.btn:focus-visible,
.form-control:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* API Testing specific styles */
.response-container {
    background: var(--light-bg);
    border-radius: 8px;
    padding: 15px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
}

.loading {
    opacity: 0.6;
    pointer-events: none;
}