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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --secondary-hover: #475569;
    --success-color: #10b981;
    --error-color: #ef4444;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Loading Screen */
.loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-color: var(--background);
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-screen p {
    margin-top: 1rem;
    color: var(--text-secondary);
}

/* Access Denied */
.access-denied-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-color: var(--background);
    padding: 1rem;
}

.access-denied-card {
    background: var(--surface);
    border-radius: 0.75rem;
    padding: 3rem 2rem;
    box-shadow: var(--shadow-lg);
    text-align: center;
    max-width: 420px;
    width: 100%;
}

.access-denied-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    line-height: 1;
}

.access-denied-card h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.access-denied-card p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Navbar */
.navbar {
    background-color: var(--surface);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-link {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 0.375rem;
    transition: all 0.2s;
}

.nav-link:hover {
    background-color: var(--background);
    color: var(--text-primary);
}

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

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

.username {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.container {
    width: 100%;
}

.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Cards */
.card {
    background-color: var(--surface);
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}

.card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

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

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

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

.btn-danger:hover {
    background-color: #dc2626;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Adapter Cards */
.adapter-card {
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

.adapter-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.adapter-icon-large {
    font-size: 3rem;
    line-height: 1;
}

.adapter-card-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    min-height: 3rem;
}

/* Status Indicators */
.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.4rem 0;
    margin-bottom: 0.75rem;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-ok { color: #065f46; }
.status-ok .status-dot {
    background-color: var(--success-color);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    animation: pulse 2.5s ease-in-out infinite;
}

.status-warning { color: #92400e; }
.status-warning .status-dot {
    background-color: #f59e0b;
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15);
}

.status-error { color: #991b1b; }
.status-error .status-dot {
    background-color: var(--error-color);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

.status-unconfigured { color: var(--text-secondary); }
.status-unconfigured .status-dot { background-color: var(--secondary-color); }

.status-unknown { color: var(--text-secondary); }
.status-unknown .status-dot { background-color: var(--border-color); }

.status-loading {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 0.4rem 0;
    margin-bottom: 0.75rem;
}

.status-spinner {
    width: 10px;
    height: 10px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    flex-shrink: 0;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Plugin Config Page */
.plugin-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--border-color);
}

.plugin-title {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.plugin-icon {
    font-size: 2.5rem;
    line-height: 1;
}

.plugin-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

.plugin-loading {
    display: flex;
    justify-content: center;
    padding: 3rem;
}

/* Forms */
.form-section {
    margin: 1.5rem 0;
    padding: 1.5rem;
    background-color: var(--background);
    border-radius: 0.375rem;
}

.form-section h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="email"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    font-size: 0.875rem;
    transition: border-color 0.2s;
    background-color: var(--surface);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group input:disabled,
.form-group select:disabled,
.form-group textarea:disabled {
    background-color: var(--background);
    cursor: not-allowed;
}

.form-group .hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.form-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

/* Messages */
.info-message {
    padding: 1rem;
    background-color: #fef3c7;
    border-left: 4px solid #f59e0b;
    border-radius: 0.375rem;
    margin-bottom: 1rem;
    color: #92400e;
    font-size: 0.875rem;
}

.error-message {
    padding: 1rem;
    background-color: #fef2f2;
    border-left: 4px solid var(--error-color);
    border-radius: 0.375rem;
    color: #991b1b;
    font-size: 0.875rem;
}

/* Notifications */
.notification {
    position: fixed;
    top: 80px;
    right: 1rem;
    padding: 1rem 1.5rem;
    background-color: var(--surface);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 1000;
    max-width: 400px;
}

.notification.show {
    transform: translateX(0);
}

.notification-success {
    border-left: 4px solid var(--success-color);
}

.notification-error {
    border-left: 4px solid var(--error-color);
}

.notification-info {
    border-left: 4px solid var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-wrap: wrap;
        height: auto;
        padding: 1rem;
    }

    .nav-menu {
        width: 100%;
        flex-direction: column;
        margin: 1rem 0;
    }

    .nav-user {
        width: 100%;
        justify-content: space-between;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .plugin-header {
        flex-direction: column;
        gap: 1rem;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions .btn {
        width: 100%;
    }
}