/* === Loading Screen === */
.loading-screen {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.4s ease;
}

.loading-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.loading-content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: 0.15em;
}

.loading-subtitle {
    color: var(--text-dim);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border);
    border-top-color: var(--highlight);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-status {
    color: var(--text-dim);
    font-size: 0.85rem;
}

.loading-progress {
    width: 240px;
    height: 4px;
    background: var(--border);
    border-radius: 2px;
    overflow: hidden;
}

.loading-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--highlight);
    border-radius: 2px;
    transition: width 0.3s ease;
}

/* === Reset & Base === */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg: #1a1a2e;
    --surface: #16213e;
    --surface-hover: #1a2745;
    --accent: #0f3460;
    --highlight: #e94560;
    --text: #eee;
    --text-dim: #999;
    --border: #2a2a4a;
    --radius: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--highlight);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* === Header === */
header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 2rem;
    display: flex;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.1em;
}

header .subtitle {
    color: var(--text-dim);
    font-size: 0.85rem;
}

header nav {
    margin-left: auto;
    display: flex;
    gap: 1rem;
}

header nav a {
    color: var(--text-dim);
    padding: 0.4rem 1rem;
    border-radius: var(--radius);
    transition: all 0.2s;
}

header nav a:hover,
header nav a.active {
    color: var(--text);
    background: var(--accent);
    text-decoration: none;
}

/* === Tag Filter === */
.tag-filter {
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
}

.tag-filter-label {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-right: 0.25rem;
}

.tag-btn {
    padding: 0.3rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--bg);
    color: var(--text-dim);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.tag-btn:hover {
    border-color: var(--highlight);
    color: var(--text);
}

.tag-btn.active {
    background: var(--highlight);
    border-color: var(--highlight);
    color: var(--text);
}

/* === Gallery === */
.gallery {
    padding: 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
    flex: 1;
}

.gallery .loading {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-dim);
    padding: 4rem;
}

.design-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}

.design-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.design-card .preview {
    width: 100%;
    height: 260px;
    background: #0d1117;
    cursor: grab;
}

.design-card .preview:active {
    cursor: grabbing;
}

.design-card .info {
    padding: 1rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.design-card .info h3 {
    font-size: 1rem;
}

.design-card .info .meta {
    color: var(--text-dim);
    font-size: 0.8rem;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.card-tag {
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    background: var(--accent);
    color: var(--text-dim);
    font-size: 0.7rem;
    cursor: pointer;
    transition: all 0.2s;
}

.card-tag:hover {
    background: var(--highlight);
    color: var(--text);
}

.design-card .actions {
    padding: 0.75rem 1.25rem;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 0.75rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.4rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--accent);
    color: var(--text);
    font-size: 0.8rem;
    cursor: pointer;
    transition: background 0.2s;
}

.btn:hover {
    background: var(--highlight);
    border-color: var(--highlight);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: #d63050;
}

/* === Editor Page === */
.editor-layout {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.editor-panel {
    width: 50%;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
}

.editor-toolbar {
    padding: 0.5rem 1rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.editor-toolbar select,
.editor-toolbar input {
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.3rem 0.5rem;
    font-size: 0.8rem;
}

.editor-toolbar label {
    font-size: 0.8rem;
    color: var(--text-dim);
}

.auto-render-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8rem;
    color: var(--text-dim);
    cursor: pointer;
    margin-left: auto;
    user-select: none;
}

.auto-render-toggle input[type="checkbox"] {
    accent-color: var(--highlight);
    cursor: pointer;
}

.auto-render-toggle:hover {
    color: var(--text);
}

.code-area {
    flex: 1;
    position: relative;
}

.code-area textarea {
    width: 100%;
    height: 100%;
    background: #0d1117;
    color: #c9d1d9;
    border: none;
    padding: 1rem;
    font-family: "JetBrains Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    resize: none;
    tab-size: 4;
}

.code-area textarea:focus {
    outline: none;
}

.preview-panel {
    width: 50%;
    display: flex;
    flex-direction: column;
}

.preview-toolbar {
    padding: 0.5rem 1rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.preview-toolbar .status {
    margin-left: auto;
    font-size: 0.8rem;
    color: var(--text-dim);
}

.preview-toolbar .status.rendering {
    color: #f0ad4e;
}

.preview-toolbar .status.success {
    color: #5cb85c;
}

.preview-toolbar .status.error {
    color: var(--highlight);
}

.preview-canvas {
    flex: 1;
    background: #0d1117;
    cursor: grab;
}

.preview-canvas:active {
    cursor: grabbing;
}

/* === Parameter Panel === */
.params-panel {
    max-height: 40%;
    overflow-y: auto;
    border-top: 1px solid var(--border);
    background: var(--surface);
    padding: 0.75rem 1rem;
}

.params-panel h4 {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.param-group {
    margin-bottom: 0.75rem;
}

.param-group .group-title {
    font-size: 0.75rem;
    color: var(--highlight);
    margin-bottom: 0.3rem;
}

.param-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.3rem;
}

.param-row label {
    font-size: 0.8rem;
    color: var(--text-dim);
    min-width: 160px;
}

.param-row input[type="number"],
.param-row input[type="range"],
.param-row select {
    flex: 1;
    background: var(--bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.2rem 0.4rem;
    font-size: 0.8rem;
}

.param-row input[type="range"] {
    padding: 0;
}

.param-row select option {
    background: var(--bg);
    color: var(--text);
}

.param-row .value {
    font-size: 0.8rem;
    color: var(--text);
    min-width: 40px;
    text-align: right;
}

.editor-toolbar select option {
    background: var(--bg);
    color: var(--text);
}

/* === Footer === */
footer {
    padding: 1rem 2rem;
    text-align: center;
    color: var(--text-dim);
    font-size: 0.8rem;
    border-top: 1px solid var(--border);
    background: var(--surface);
}

/* === Responsive === */
@media (max-width: 768px) {
    header {
        padding: 1rem;
    }

    .gallery {
        padding: 1rem;
        grid-template-columns: 1fr;
    }

    .editor-layout {
        flex-direction: column;
    }

    .editor-panel,
    .preview-panel {
        width: 100%;
        height: 50vh;
    }
}