/* Stage Designer 3D — 舞台設計器 */
:root {
    --bg: #07070c;
    --s: #0e0e18;
    --s2: #14142a;
    --bd: #1e1e3a;
    --t: #e8e8f4;
    --m: #7a7a9e;
    --ac: #6c5ce7;
    --ac2: #a29bfe;
    --green: #00d2a0;
    --red: #ff4757;
    --orange: #ffa502;
    --blue: #4da6ff;
}

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

body {
    font-family: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--t);
    overflow: hidden;
    height: 100vh;
}

/* ═══ Layout ═══ */
.app-layout {
    display: grid;
    grid-template-rows: 48px 1fr 42px;
    grid-template-columns: 260px 1fr 280px;
    height: 100vh;
}

.header { grid-column: 1 / -1; }
.sidebar-left { grid-row: 2; }
.viewport { grid-row: 2; grid-column: 2; }
.sidebar-right { grid-row: 2; grid-column: 3; }
.bottom-bar { grid-column: 1 / -1; }

/* ═══ Header ═══ */
.header {
    background: var(--s);
    border-bottom: 1px solid var(--bd);
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 12px;
    z-index: 50;
}

.header h1 {
    font-size: 0.95rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.header h1 .icon { color: var(--ac); }

.header-sep { width: 1px; height: 24px; background: var(--bd); }

.view-btns { display: flex; gap: 2px; }
.view-btn {
    padding: 5px 12px;
    font-size: 0.72rem;
    background: transparent;
    border: 1px solid var(--bd);
    color: var(--m);
    cursor: pointer;
    transition: all 0.15s;
}
.view-btn:first-child { border-radius: 6px 0 0 6px; }
.view-btn:last-child { border-radius: 0 6px 6px 0; }
.view-btn.active, .view-btn:hover { background: var(--ac); color: #fff; border-color: var(--ac); }

.header-actions { margin-left: auto; display: flex; gap: 6px; }

.btn {
    padding: 6px 14px;
    font-size: 0.75rem;
    background: var(--s2);
    border: 1px solid var(--bd);
    border-radius: 6px;
    color: var(--t);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.15s;
}
.btn:hover { border-color: var(--ac); }
.btn-primary { background: linear-gradient(135deg, var(--ac), var(--ac2)); border: none; color: #fff; font-weight: 600; }

/* ═══ Sidebar Left (Equipment Library) ═══ */
.sidebar-left {
    background: var(--s);
    border-right: 1px solid var(--bd);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-header {
    padding: 12px 14px;
    border-bottom: 1px solid var(--bd);
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-header i { color: var(--ac); font-size: 0.85rem; }

.search-input {
    margin: 8px 10px;
    padding: 7px 10px;
    background: var(--s2);
    border: 1px solid var(--bd);
    border-radius: 6px;
    color: var(--t);
    font-size: 0.78rem;
    outline: none;
}
.search-input:focus { border-color: var(--ac); }

.eq-categories { flex: 1; overflow-y: auto; padding: 4px 8px; }

.eq-cat-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--m);
    padding: 10px 6px 4px;
    font-weight: 600;
}

.eq-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: 6px;
    cursor: grab;
    font-size: 0.78rem;
    transition: background 0.15s;
    user-select: none;
}
.eq-item:hover { background: rgba(108,92,231,0.12); }
.eq-item:active { cursor: grabbing; }
.eq-item .eq-icon { width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; background: var(--s2); border-radius: 6px; font-size: 0.9rem; border: 1px solid var(--bd); }
.eq-item .eq-info { flex: 1; }
.eq-item .eq-name { font-weight: 500; display: block; }
.eq-item .eq-dim { font-size: 0.65rem; color: var(--m); }

/* ═══ Viewport ═══ */
.viewport {
    position: relative;
    background: var(--bg);
    overflow: hidden;
}

.viewport-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    z-index: 10;
}

.viewport-stats {
    position: absolute;
    top: 10px; left: 10px;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(6px);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.7rem;
    color: var(--m);
    pointer-events: none;
}

.viewport-hint {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.5);
    backdrop-filter: blur(6px);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.7rem;
    color: var(--m);
    pointer-events: none;
}

/* ═══ Sidebar Right (Properties) ═══ */
.sidebar-right {
    background: var(--s);
    border-left: 1px solid var(--bd);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.props-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    color: var(--m);
    font-size: 0.82rem;
    gap: 8px;
    text-align: center;
    padding: 20px;
}
.props-empty i { font-size: 2rem; opacity: 0.15; }

.prop-group {
    padding: 12px 14px;
    border-bottom: 1px solid var(--bd);
}

.prop-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--m);
    font-weight: 600;
    margin-bottom: 6px;
}

.prop-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 4px;
}

.prop-row label {
    width: 18px;
    font-size: 0.72rem;
    color: var(--m);
    font-weight: 500;
}

.prop-input {
    flex: 1;
    background: var(--s2);
    border: 1px solid var(--bd);
    border-radius: 4px;
    padding: 4px 8px;
    color: var(--t);
    font-size: 0.75rem;
    outline: none;
    width: 100%;
}
.prop-input:focus { border-color: var(--ac); }

.prop-row-inline {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 4px;
}

/* ═══ Bottom Bar ═══ */
.bottom-bar {
    background: var(--s);
    border-top: 1px solid var(--bd);
    display: flex;
    align-items: center;
    padding: 0 16px;
    font-size: 0.72rem;
    color: var(--m);
    gap: 20px;
}

.bom-summary { display: flex; gap: 16px; }
.bom-item { display: flex; align-items: center; gap: 4px; }
.bom-count { color: var(--green); font-weight: 600; }

/* ═══ Scrollbar ═══ */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bd); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--ac); }

/* ═══ Responsive ═══ */
@media (max-width: 900px) {
    .app-layout { grid-template-columns: 1fr; }
    .sidebar-left, .sidebar-right { display: none; }
}