/* CSS Reset and Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary-color: #0db7ed;
    --primary-dark: #0a8cb8;
    --primary-light: #e6f7fc;
    --secondary-color: #384d54;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --dark-color: #1e1e1e;
    --light-color: #f8f9fa;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --transition: all 0.2s ease;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Code', monospace;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--gray-100);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--dark-color) 100%);
    color: white;
    padding: 1.5rem 0;
    box-shadow: var(--shadow);
}

.header .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-img {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.tagline {
    margin-top: 0.5rem;
    color: var(--primary-color);
    font-size: 1rem;
}

/* Main Content */
.main {
    flex: 1;
    padding: 2rem 0;
}

.app-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: start;
}

/* Panel Styles */
.panel {
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
}

.panel-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--gray-800);
}

.panel-section {
    padding: 1.25rem;
    border-top: 1px solid var(--gray-200);
}

.panel-section h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 0.75rem;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-300);
}

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

.btn-danger:hover:not(:disabled) {
    background: #c82333;
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
}

.btn .icon {
    font-size: 1rem;
}

/* Service List */
.services-list,
.networks-list,
.volumes-list {
    padding: 1rem 1.25rem;
}

.service-card,
.network-card,
.volume-card {
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-bottom: 0.75rem;
    transition: var(--transition);
}

.service-card:hover,
.network-card:hover,
.volume-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.service-card:last-child,
.network-card:last-child,
.volume-card:last-child {
    margin-bottom: 0;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.card-title {
    font-weight: 600;
    color: var(--gray-800);
    font-size: 1rem;
}

.card-actions {
    display: flex;
    gap: 0.5rem;
}

.card-details {
    font-size: 0.85rem;
    color: var(--gray-600);
}

.card-details span {
    display: inline-block;
    margin-right: 1rem;
}

.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--gray-500);
}

.empty-state p {
    margin-bottom: 1rem;
}

/* Preview Panel */
.preview-panel {
    position: sticky;
    top: 1rem;
}

.preview-actions {
    display: flex;
    gap: 0.5rem;
}

.yaml-preview {
    margin: 0;
    padding: 1.25rem;
    background: var(--dark-color);
    color: #e6e6e6;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.7;
    overflow-x: auto;
    min-height: 400px;
    max-height: calc(100vh - 200px);
    overflow-y: auto;
}

.yaml-preview code {
    font-family: inherit;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--border-radius-lg);
    width: 100%;
    max-width: 700px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
}

.modal-small {
    max-width: 450px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--gray-100);
    border-bottom: 1px solid var(--gray-200);
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--gray-500);
    cursor: pointer;
    padding: 0.25rem;
    line-height: 1;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--gray-800);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--gray-100);
    border-top: 1px solid var(--gray-200);
}

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

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--gray-700);
    font-size: 0.9rem;
}

.form-group input[type="text"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.95rem;
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    background: white;
    transition: var(--transition);
    font-family: inherit;
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

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

.form-help {
    display: block;
    margin-top: 0.375rem;
    font-size: 0.8rem;
    color: var(--gray-500);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-weight: normal !important;
}

.checkbox-label input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    cursor: pointer;
}

.checkbox-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.checkbox-list .empty-message {
    color: var(--gray-500);
    font-size: 0.85rem;
    font-style: italic;
}

/* Tabs */
.form-tabs {
    display: flex;
    gap: 0.25rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--gray-200);
    overflow-x: auto;
    padding-bottom: 0;
}

.tab-btn {
    padding: 0.75rem 1rem;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-600);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--gray-800);
}

.tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--gray-800);
    color: white;
    padding: 0.875rem 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    opacity: 0;
    transition: all 0.3s ease;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

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

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

/* Footer Styles */
.footer {
    background: var(--secondary-color);
    color: var(--gray-300);
    padding: 1.25rem 0;
    text-align: center;
    margin-top: auto;
}

.footer p {
    font-size: 0.9rem;
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.footer a:hover {
    color: white;
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .app-layout {
        grid-template-columns: 1fr;
    }

    .preview-panel {
        position: static;
    }

    .yaml-preview {
        max-height: 400px;
    }
}

@media (max-width: 768px) {
    .header {
        padding: 1rem 0;
    }

    .logo h1 {
        font-size: 1.4rem;
    }

    .logo-img {
        width: 40px;
        height: 40px;
    }

    .main {
        padding: 1rem 0;
    }

    .panel-header {
        flex-direction: column;
        gap: 0.75rem;
        align-items: flex-start;
    }

    .preview-actions {
        width: 100%;
    }

    .preview-actions .btn {
        flex: 1;
    }

    .modal-content {
        max-height: 95vh;
        margin: 0.5rem;
    }

    .form-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .tab-btn {
        padding: 0.6rem 0.8rem;
        font-size: 0.85rem;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }

    .card-actions {
        width: 100%;
    }

    .card-actions .btn {
        flex: 1;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }

    .logo {
        flex-direction: column;
        gap: 0.5rem;
    }

    .logo h1 {
        font-size: 1.25rem;
    }

    .btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }

    .panel-header h2 {
        font-size: 1rem;
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 1rem;
    }

    .yaml-preview {
        font-size: 0.75rem;
        padding: 1rem;
    }
}

/* Utility Classes */
.text-danger {
    color: var(--danger-color);
}

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

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }

/* YAML Syntax Highlighting */
.yaml-key {
    color: #f8c555;
}

.yaml-value {
    color: #98c379;
}

.yaml-comment {
    color: #5c6370;
    font-style: italic;
}

/* Scrollbar Styling */
.yaml-preview::-webkit-scrollbar,
.modal-body::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.yaml-preview::-webkit-scrollbar-track,
.modal-body::-webkit-scrollbar-track {
    background: var(--gray-200);
}

.yaml-preview::-webkit-scrollbar-thumb,
.modal-body::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 4px;
}

.yaml-preview::-webkit-scrollbar-thumb:hover,
.modal-body::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

.yaml-preview::-webkit-scrollbar-track {
    background: var(--gray-700);
}

.yaml-preview::-webkit-scrollbar-thumb {
    background: var(--gray-500);
}