/* ============================================================
   GrobSim — ruimteakoestiek simulator
   Huisstijl: grob.tech (zwart / oranje / Verdana)
   ============================================================ */

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

:root {
    --bg:         #000000;
    --bg-alt:     #080808;
    --surface:    #0f0f0f;
    --surface-2:  #161616;
    --border:     #222222;
    --accent:     #fe8a02;
    --accent-dim: #c96c01;
    --accent-glow:rgba(254,138,2,0.13);
    --text:       #e8e8ec;
    --text-muted: #7a7a8c;
    --text-dim:   #4a4a58;
    --green:      #4caf6a;
    --orange:     #fe8a02;
    --red:        #e05252;
    --radius:     10px;
    --font:       Verdana, Geneva, sans-serif;
    --nav-h:      60px;
}

html, body {
    height: 100%;
    overflow: hidden;
    font-family: var(--font);
    font-size: 13px;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

/* ─── Nav ────────────────────────────────────────────────── */
.app-nav {
    position: relative;
    z-index: 10;
    height: var(--nav-h);
    background: rgba(0,0,0,0.92);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    flex-shrink: 0;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 12px;
}
.nav__logo-img {
    height: 32px;
    width: auto;
    display: block;
    opacity: 0.9;
}
.nav__divider {
    width: 1px;
    height: 22px;
    background: var(--border);
}
.nav__page-title {
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
}
.nav__page-sub {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-left: 6px;
    letter-spacing: 0.04em;
}
.nav__right {
    font-size: 0.76rem;
    color: var(--text-dim);
}

/* ─── Layout ─────────────────────────────────────────────── */
.app-layout {
    display: flex;
    height: calc(100vh - var(--nav-h));
    overflow: hidden;
}

/* ─── Sidebar ────────────────────────────────────────────── */
.sidebar {
    width: 268px;
    flex-shrink: 0;
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.panel {
    border-bottom: 1px solid var(--border);
    padding: 14px 16px;
}
.panel-header {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 10px;
}

/* Model list */
.model-list { display: flex; flex-direction: column; gap: 3px; margin-bottom: 10px; }

.model-item {
    padding: 8px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.82rem;
    color: var(--text-muted);
    border: 1px solid transparent;
    transition: all 0.15s;
    position: relative;
}
.model-item::before {
    content: '';
    position: absolute;
    left: 0; top: 6px; bottom: 6px;
    width: 2px;
    background: var(--accent);
    border-radius: 2px;
    opacity: 0;
    transition: opacity 0.15s;
}
.model-item:hover  { background: var(--surface-2); color: var(--text); }
.model-item.active {
    background: var(--accent-glow);
    border-color: rgba(254,138,2,0.25);
    color: var(--accent);
}
.model-item.active::before { opacity: 1; }

.list-loading { font-size: 0.8rem; color: var(--text-dim); padding: 4px 0; }
.list-error   { font-size: 0.8rem; color: var(--red);      line-height: 1.6; padding: 4px 0; }

/* Upload */
.upload-btn {
    display: block;
    text-align: center;
    padding: 7px 12px;
    border: 1px dashed var(--border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--text-dim);
    font-family: var(--font);
    transition: all 0.15s;
}
.upload-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
}

/* Properties */
.props-list { display: flex; flex-direction: column; gap: 4px; }
.prop {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-size: 0.8rem;
    padding: 4px 0;
    border-bottom: 1px solid var(--border);
}
.prop:last-child { border-bottom: none; }
.prop span { color: var(--text-muted); }
.prop strong { font-weight: 600; text-align: right; max-width: 55%; }

.tag-green  { color: var(--green); }
.tag-orange { color: var(--orange); }

/* Materials legend */
.materials-legend { display: flex; flex-direction: column; gap: 7px; }
.legend-item { display: flex; align-items: center; gap: 8px; font-size: 0.8rem; }
.legend-swatch {
    width: 12px; height: 12px; border-radius: 3px;
    flex-shrink: 0; opacity: 0.85;
}
.legend-name  { flex: 1; color: var(--text-muted); }
.legend-area  { color: var(--text-dim); font-variant-numeric: tabular-nums; }

/* ─── Main area ───────────────────────────────────────────── */
.main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* 3-D viewer */
.viewer-container {
    flex: 1;
    position: relative;
    min-height: 0;
    background: #080808;
}
.viewer-container canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}
.viewer-placeholder {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    color: var(--text-dim);
    pointer-events: none;
}
.placeholder-icon {
    font-size: 2.8rem;
    color: rgba(254,138,2,0.15);
}
.viewer-placeholder p {
    font-size: 0.85rem;
}

/* Toolbar */
.calc-toolbar {
    flex-shrink: 0;
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 10px 16px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}

/* ─── Buttons (GrobTech stijl) ────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    border-radius: 7px;
    font-family: var(--font);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.18s ease;
    white-space: nowrap;
}
.btn sub { font-size: 0.7em; }

.btn--primary {
    background: var(--accent);
    color: #000000;
}
.btn--primary:hover {
    background: #ff9a1f;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(254,138,2,0.3);
}

.btn--ghost {
    background: transparent;
    color: var(--text-muted);
    border: 1.5px solid var(--border);
}
.btn--ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-1px);
}

.btn.active {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Results area */
.results-area {
    flex-shrink: 0;
    max-height: 42vh;
    overflow-y: auto;
    background: var(--bg);
    border-top: 1px solid var(--border);
    padding: 16px 20px;
}
.results-area::-webkit-scrollbar { width: 4px; }
.results-area::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ─── Result cards ────────────────────────────────────────── */
.result-card h3 {
    font-size: 0.92rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    margin-bottom: 8px;
    color: var(--accent);
    text-transform: uppercase;
}
.result-note {
    font-size: 0.79rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    line-height: 1.65;
}
.schroeder-value {
    font-size: 3.2rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--accent);
    margin: 8px 0 4px;
    letter-spacing: -0.02em;
}

/* Tables */
.table-scroll { overflow-x: auto; }
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8rem;
    margin-bottom: 12px;
}
th {
    padding: 6px 12px;
    background: var(--surface);
    text-align: left;
    color: var(--text-muted);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}
td {
    padding: 5px 12px;
    border-bottom: 1px solid var(--border);
    font-variant-numeric: tabular-nums;
    color: var(--text);
}
tr:hover td { background: rgba(254,138,2,0.04); }
.freq-cell   { font-weight: 700; color: var(--accent); }
.method-cell { color: var(--text-muted); font-size: 0.76rem; }
.abs-row td  { color: var(--text-dim); background: rgba(0,0,0,0.3); }

/* Mode type tags */
.tag {
    display: inline-block;
    padding: 2px 7px;
    border-radius: 4px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.tag-axiaal      { background: rgba(254,138,2,0.12); color: var(--accent); }
.tag-tangentieel { background: rgba(254,138,2,0.07); color: #d47000; }
.tag-oblique     { background: rgba(100,100,100,0.15); color: var(--text-muted); }
.tag-modal       { background: rgba(254,138,2,0.12); color: var(--accent);     font-size: 0.72rem; padding: 2px 6px; border-radius: 4px; }
.tag-diffuse     { background: rgba(76,175,106,0.12); color: var(--green);     font-size: 0.72rem; padding: 2px 6px; border-radius: 4px; }

/* Warning box */
.warn-box {
    background: rgba(254,138,2,0.07);
    border-left: 3px solid var(--accent);
    padding: 10px 14px;
    border-radius: 0 6px 6px 0;
    color: var(--text-muted);
    font-size: 0.84rem;
    line-height: 1.65;
}

/* ─── Critical distance controls ─────────────────────────── */
.critical-controls {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    align-items: flex-end;
    margin-bottom: 14px;
    padding: 12px 14px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.critical-controls label {
    display: flex;
    flex-direction: column;
    gap: 5px;
    font-size: 0.78rem;
    color: var(--text-muted);
    font-family: var(--font);
}
.critical-controls select,
.critical-controls input[type="number"] {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 5px;
    color: var(--text);
    font-family: var(--font);
    font-size: 0.82rem;
    padding: 5px 8px;
    outline: none;
    transition: border-color 0.15s;
}
.critical-controls select:focus,
.critical-controls input[type="number"]:focus { border-color: var(--accent); }
.critical-controls select { min-width: 200px; }
.r-input-group {
    display: flex;
    align-items: center;
    gap: 6px;
}
.r-input-group input { width: 80px; }
.r-input-group span  { color: var(--text-dim); font-size: 0.8rem; }

/* D/R colour coding */
.dr-high   { color: #4caf6a; font-weight: 700; }
.dr-mid    { color: var(--accent); font-weight: 600; }
.dr-low    { color: #c97000; }
.dr-reverb { color: #888; }

.dr-legend {
    margin-top: 8px;
    font-size: 0.76rem;
    color: var(--text-dim);
}
.dr-legend span { font-weight: 700; margin-right: 2px; }

/* Details/summary voor absorptietabel */
.abs-details {
    margin-top: 8px;
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
}
.abs-details summary {
    padding: 7px 14px;
    cursor: pointer;
    background: var(--surface);
    font-size: 0.78rem;
    color: var(--text-dim);
    user-select: none;
    transition: color 0.15s;
}
.abs-details summary:hover { color: var(--text-muted); }
.abs-details .table-scroll { padding: 0 4px 4px; }