:root {
    --bg: #1a1f2e;
    --bg-2: #252b3d;
    --bg-3: #2f364b;
    --fg: #e8eaf0;
    --accent: #ff8c42;
    --accent-2: #f76b1c;
    --highlight: #ffba08;
    --success: #4ade80;
    --danger: #f87171;
    --info: #60a5fa;
    --pulse: #c084fc;
    --pause: #475569;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh;
}
body {
    display: flex;
    flex-direction: column;
    padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
header {
    text-align: center;
    padding: 20px 16px 12px;
    border-bottom: 1px solid var(--bg-3);
    background: var(--bg-2);
}
header h1 {
    font-size: 26px;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.5px;
}
header .tagline {
    color: #94a3b8;
    font-size: 12px;
    margin-top: 4px;
    font-style: italic;
}

.tabs {
    display: flex;
    background: var(--bg-2);
    border-bottom: 1px solid var(--bg-3);
    position: sticky;
    top: 0;
    z-index: 10;
}
.tab-btn {
    flex: 1;
    padding: 14px 8px;
    background: transparent;
    border: 0;
    color: #94a3b8;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.15s;
}
.tab-btn:hover { color: var(--fg); }
.tab-btn.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

main {
    flex: 1;
    padding: 16px;
    max-width: 920px;
    margin: 0 auto;
    width: 100%;
}
.tab { display: none; }
.tab.active { display: block; animation: fadeIn 0.2s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: translateY(0); } }

h2 {
    color: var(--accent);
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 4px;
}
.subtitle {
    color: #94a3b8;
    font-size: 13px;
    margin-bottom: 18px;
    line-height: 1.5;
}

/* Filter bar (bibliotheek) */
.filter-bar {
    display: flex;
    gap: 6px;
    margin-bottom: 16px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.filter-btn {
    flex-shrink: 0;
    padding: 8px 14px;
    background: var(--bg-2);
    border: 1px solid var(--bg-3);
    border-radius: 18px;
    color: #94a3b8;
    font-family: inherit;
    font-size: 13px;
    cursor: pointer;
}
.filter-btn.active {
    background: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
}

/* Pattern grid */
.pattern-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 12px;
}
.pattern-card {
    background: var(--bg-2);
    border: 1px solid var(--bg-3);
    border-radius: 12px;
    padding: 14px;
    cursor: pointer;
    transition: all 0.15s;
    user-select: none;
    -webkit-user-select: none;
    position: relative;
}
.pattern-card:active {
    background: var(--bg-3);
    transform: scale(0.97);
}
.pattern-card .name {
    font-weight: 600;
    font-size: 15px;
    margin-bottom: 4px;
}
.pattern-card .category {
    font-size: 11px;
    color: var(--accent);
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}
.pattern-card .preview {
    display: flex;
    align-items: end;
    height: 36px;
    gap: 1px;
    background: var(--bg);
    padding: 4px;
    border-radius: 4px;
}
.pattern-card .bar {
    background: var(--accent);
    flex: 1;
    min-height: 2px;
    border-radius: 1px;
}
.pattern-card .gap {
    background: transparent;
    flex: 1;
}
.pattern-card .actions {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.15s;
}
.pattern-card:hover .actions { opacity: 1; }
.pattern-card .icon-btn {
    width: 24px;
    height: 24px;
    background: var(--bg-3);
    border: 0;
    border-radius: 4px;
    color: var(--fg);
    font-size: 12px;
    cursor: pointer;
}
.pattern-card .icon-btn:hover { background: var(--danger); color: white; }
.pattern-card .description {
    font-size: 11px;
    color: #94a3b8;
    margin-top: 6px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Editor */
.editor-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}
.editor-bar input, .editor-bar select {
    flex: 1;
    padding: 10px 14px;
    background: var(--bg-2);
    color: var(--fg);
    border: 1px solid var(--bg-3);
    border-radius: 8px;
    font-family: inherit;
    font-size: 14px;
}
.editor-bar input:focus, .editor-bar select:focus {
    outline: none;
    border-color: var(--accent);
}

.timeline-wrap {
    background: var(--bg-2);
    border: 1px solid var(--bg-3);
    border-radius: 12px;
    padding: 12px;
    margin-bottom: 16px;
    overflow-x: auto;
}
#timeline-canvas {
    width: 100%;
    height: 120px;
    background: var(--bg);
    border-radius: 8px;
    cursor: crosshair;
    display: block;
}
.timeline-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
    flex-wrap: wrap;
}
.tool-btn {
    padding: 8px 14px;
    background: var(--bg-3);
    border: 1px solid transparent;
    border-radius: 6px;
    color: #94a3b8;
    font-family: inherit;
    font-size: 13px;
    cursor: pointer;
}
.tool-btn.active {
    background: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
}
.tool-btn.danger { color: var(--danger); }
.timeline-toolbar .hint {
    font-size: 12px;
    color: #94a3b8;
    font-style: italic;
    flex: 1;
}

.pattern-info {
    margin-bottom: 16px;
}
.pattern-stats {
    padding: 8px 14px;
    background: var(--bg-2);
    border-radius: 6px;
    font-size: 13px;
    color: var(--accent);
    text-align: center;
}

.editor-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}
.editor-actions button {
    flex: 1;
    min-width: 90px;
    padding: 12px 16px;
    border-radius: 8px;
    border: 0;
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
}
button.primary {
    background: var(--accent);
    color: var(--bg);
}
button.secondary {
    background: var(--bg-3);
    color: var(--fg);
    border: 1px solid var(--bg-3);
}
button.danger { background: var(--danger); color: white; }
.editor-actions button:hover { transform: translateY(-1px); }
.editor-actions button:active { transform: scale(0.97); }

.loop-control {
    padding: 8px;
    background: var(--bg-2);
    border-radius: 6px;
    text-align: center;
    font-size: 13px;
}

/* Stats banner */
.stats-banner {
    padding: 14px;
    background: var(--bg-2);
    border: 1px dashed var(--bg-3);
    border-radius: 8px;
    text-align: center;
    color: #94a3b8;
    font-size: 13px;
    margin-bottom: 16px;
}
.stats-banner.active {
    border-style: solid;
    border-color: var(--success);
    color: var(--success);
}

/* Share tab */
.share-current {
    background: var(--bg-2);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 18px;
}
.share-current h3 {
    color: var(--accent);
    font-size: 15px;
    margin-bottom: 8px;
}
.share-preview {
    font-family: monospace;
    font-size: 12px;
    color: var(--fg);
    background: var(--bg);
    padding: 10px;
    border-radius: 6px;
    word-break: break-all;
}
.share-actions, .share-import {
    background: var(--bg-2);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
}
.share-actions h3, .share-import h3 {
    color: var(--accent);
    font-size: 15px;
    margin-bottom: 12px;
}
.share-actions button {
    margin-right: 8px;
    margin-bottom: 8px;
}
.qr-section {
    background: var(--bg-2);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 16px;
    text-align: center;
}
.qr-section h3 { color: var(--accent); margin-bottom: 12px; }
#qr-canvas-wrap canvas {
    image-rendering: pixelated;
    background: white;
    padding: 12px;
    border-radius: 8px;
    margin: 0 auto;
    display: block;
    max-width: 240px;
}
.qr-section .hint {
    font-size: 12px;
    color: #94a3b8;
    margin-top: 10px;
}
.import-row {
    display: flex;
    gap: 8px;
}
.import-row input {
    flex: 1;
    padding: 10px 14px;
    background: var(--bg);
    color: var(--fg);
    border: 1px solid var(--bg-3);
    border-radius: 8px;
    font-family: inherit;
    font-size: 13px;
}
.import-row input:focus { outline: none; border-color: var(--accent); }
.import-row button { flex-shrink: 0; }

/* Toast (notificatie-banner) */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 20px;
    background: var(--bg-3);
    color: var(--fg);
    border-radius: 24px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    font-size: 14px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s, transform 0.3s;
    z-index: 100;
    max-width: 90%;
    text-align: center;
}
.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(-12px);
    pointer-events: auto;
}
.toast.success { background: var(--success); color: var(--bg); }
.toast.error { background: var(--danger); color: white; }

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 50;
    padding: 16px;
}
.modal.active { display: flex; }
.modal-content {
    background: var(--bg-2);
    border-radius: 12px;
    padding: 24px;
    max-width: 500px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
}
.modal-close {
    position: absolute;
    top: 8px;
    right: 8px;
    background: transparent;
    border: 0;
    color: #94a3b8;
    font-size: 22px;
    cursor: pointer;
    width: 32px;
    height: 32px;
    border-radius: 50%;
}
.modal-close:hover { background: var(--bg-3); color: var(--fg); }
.modal-content h2 {
    margin-bottom: 12px;
    padding-right: 32px;
}
.modal-content button {
    padding: 8px 16px;
    background: var(--accent);
    color: var(--bg);
    border: 0;
    border-radius: 6px;
    cursor: pointer;
    margin-right: 6px;
}
.modal-content .btn-row {
    display: flex;
    gap: 6px;
    margin-top: 16px;
}
.modal-content pre {
    background: var(--bg);
    color: var(--fg);
    padding: 10px;
    border-radius: 6px;
    font-size: 12px;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

footer {
    padding: 10px 16px;
    background: var(--bg-2);
    border-top: 1px solid var(--bg-3);
    font-size: 12px;
    text-align: center;
    color: #94a3b8;
}

@media (max-width: 600px) {
    main { padding: 12px; }
    h2 { font-size: 19px; }
    .pattern-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}