/* ===================================================================
   Binaural Beats Lab — jackdaw skin
   Structure ported from the standalone app; palette and chrome now
   pull from theme.css so it reads as the same instrument as the
   psychoacoustics tool next door.
   =================================================================== */

.tool-binaural {
    padding: 26px 22px 48px;
    max-width: 1080px;
    margin: 0 auto;
}

.tool-binaural .hero {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    flex-wrap: wrap;
    align-items: center;
    margin-bottom: 20px;
    padding: 16px 20px;
    border-radius: var(--radius);
    background: linear-gradient(180deg, var(--panel-raised), var(--panel));
    border: 1px solid var(--line);
}

.tool-binaural .hero h1 {
    margin: 0;
    font-size: clamp(1.35rem, 3vw, 1.7rem);
    color: var(--text);
}

.tool-binaural .hero p {
    margin: 5px 0 0;
    color: var(--text-dim);
    font-size: 0.88rem;
    max-width: 46ch;
}

.tool-binaural .status-chip {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    border: 1px solid var(--line);
    background: var(--bg-1);
    padding: 8px 13px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-dim);
}

.tool-binaural .aux-actions {
    display: grid;
    gap: 8px;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 8px;
}

.tool-binaural .grid {
    display: grid;
    gap: 18px;
}

/* the module: shared card chrome, brass rivets in the corners */
.tool-binaural .module {
    position: relative;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px 20px 22px;
    background: linear-gradient(180deg, var(--panel-raised) 0%, var(--panel) 100%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03), 0 10px 24px rgba(0, 0, 0, 0.35);
}

.tool-binaural .module::before,
.tool-binaural .module::after {
    content: "";
    position: absolute;
    top: 9px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 30%, var(--brass-bright), var(--brass-deep) 80%);
    opacity: 0.75;
}
.tool-binaural .module::before { left: 9px; }
.tool-binaural .module::after { right: 9px; }

.tool-binaural .module h2 {
    display: inline-block;
    margin: 0 0 8px;
    padding: 4px 12px 5px;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--eye-bright);
    background: var(--bg-0);
    border: 1px solid var(--line);
    border-radius: 5px;
    text-shadow: 0 0 8px rgba(143, 225, 255, 0.25);
}

.tool-binaural .module h3 {
    margin: 0 0 6px;
    font-size: 0.95rem;
    color: var(--text);
}

.tool-binaural .muted { color: var(--text-dim); font-size: 0.88rem; margin: 0; }

/* preset / stereo overlays */
.tool-binaural .preset-panel,
.tool-binaural .stereo-panel {
    position: fixed;
    z-index: 30;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -48%) scale(0.98);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.tool-binaural .preset-panel { width: min(1040px, calc(100vw - 28px)); max-height: 88vh; }
.tool-binaural .stereo-panel { width: min(480px, calc(100vw - 24px)); }

.tool-binaural .preset-panel.open,
.tool-binaural .stereo-panel.open {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, -50%) scale(1);
}

.tool-binaural .preset-panel-body { overflow: auto; max-height: calc(88vh - 84px); padding-right: 2px; }

.tool-binaural .preset-backdrop,
.tool-binaural .stereo-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(4, 5, 7, 0.78);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    z-index: 25;
}
.tool-binaural .preset-backdrop.open,
.tool-binaural .stereo-backdrop.open { opacity: 1; pointer-events: auto; }

.tool-binaural .preset-header {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: baseline;
    margin-bottom: 12px;
}
.tool-binaural .preset-header-actions { display: inline-flex; align-items: center; gap: 8px; }
.tool-binaural .stereo-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; margin-top: 10px; }

/* controls */
.tool-binaural .controls { display: grid; gap: 16px; margin-top: 16px; }
.tool-binaural .frequency-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: start; }
.tool-binaural .base-slider-hidden { display: none; }

.tool-binaural .mix-stack,
.tool-binaural .segment-frequency,
.tool-binaural .delta-control,
.tool-binaural .delta-dial,
.tool-binaural .delta-bands,
.tool-binaural .mix-card,
.tool-binaural .option-card,
.tool-binaural .segment-stepper,
.tool-binaural .delta-stepper,
.tool-binaural .protocol-builder,
.tool-binaural .readout {
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    background: var(--bg-1);
}

.tool-binaural .mix-stack { margin-top: 12px; padding: 11px; display: grid; gap: 9px; }
.tool-binaural .mix-card { padding: 10px 11px; position: relative; }
.tool-binaural .control-row { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center; }
.tool-binaural .control-row label {
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-dim);
}
.tool-binaural .control-value {
    font-family: var(--mono);
    font-size: 0.82rem;
    color: var(--eye-bright);
    background: var(--bg-0);
    padding: 2px 7px;
    border-radius: 3px;
}

.tool-binaural select { width: 100%; }

.tool-binaural .segment-frequency { margin-top: 12px; padding: 12px; }

.tool-binaural .segment-display,
.tool-binaural .delta-display {
    font-family: var(--mono);
    color: var(--eye-bright);
    text-shadow: 0 0 6px rgba(143, 225, 255, 0.75), 0 0 14px rgba(143, 225, 255, 0.3);
    background: radial-gradient(120% 90% at 50% 0%, #10151b, #05070a 75%);
    border: 1px solid #000;
    border-radius: var(--radius-sm);
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.85);
}

.tool-binaural .segment-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    font-size: clamp(1.1rem, 3.6vw, 1.35rem);
    padding: 12px 6px;
}

.tool-binaural .segment-block { display: inline-flex; align-items: baseline; gap: 5px; }
.tool-binaural .segment-value { min-width: 2ch; text-align: center; }
.tool-binaural .segment-value.hz { min-width: 3ch; }
.tool-binaural .segment-unit { font-size: 0.6em; color: rgba(188, 217, 230, 0.75); letter-spacing: 0.05em; }
.tool-binaural .segment-decimal-dot { opacity: 0.85; }

.tool-binaural .segment-controls { margin-top: 11px; display: grid; gap: 8px; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.tool-binaural .segment-stepper { padding: 8px; }
.tool-binaural .segment-stepper-label,
.tool-binaural .delta-stepper-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-faint);
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
}
.tool-binaural .segment-stepper-row,
.tool-binaural .delta-stepper-row { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }

.tool-binaural .segment-btn {
    padding: 7px 8px;
    border-radius: 5px;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text);
    border: 1px solid var(--line);
    background: linear-gradient(180deg, var(--panel-raised), var(--panel));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}
.tool-binaural .segment-btn:hover { filter: brightness(1.15); }
.tool-binaural .segment-btn:active { transform: translateY(1px); }

.tool-binaural .frequency-hint { margin-top: 7px; font-size: 0.76rem; color: var(--text-faint); text-align: right; }

.tool-binaural .delta-layout { display: grid; grid-template-columns: 1.35fr 1fr; gap: 12px; align-items: stretch; }
.tool-binaural .delta-control { padding: 12px; }
.tool-binaural .delta-display { display: flex; align-items: baseline; justify-content: center; gap: 6px; padding: 12px 8px; }
.tool-binaural .delta-display .value { font-size: 1.35rem; font-weight: 600; min-width: 4ch; text-align: center; }
.tool-binaural .delta-display .unit { font-size: 0.8rem; color: rgba(188, 217, 230, 0.75); }
.tool-binaural .delta-controls { margin-top: 9px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.tool-binaural .delta-stepper { padding: 8px; }

/* brainwave dial: each band keeps a distinct hue, drawn from the shared palette */
.tool-binaural .delta-dial { padding: 12px; display: grid; grid-template-rows: auto auto auto; gap: 10px; justify-items: center; }
.tool-binaural .dial-ring {
    position: relative;
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background:
        radial-gradient(circle at center, #05070a 0 38%, transparent 39% 100%),
        repeating-conic-gradient(from -90deg, rgba(0, 0, 0, 0.45) 0deg 1deg, transparent 1deg 9deg),
        conic-gradient(
            var(--eye) 0deg 29deg,
            var(--eye-bright) 29deg 55deg,
            var(--good) 55deg 97deg,
            var(--brass) 97deg 209deg,
            var(--danger) 209deg 270deg,
            #1a1e24 270deg 360deg
        );
    box-shadow: inset 0 0 16px rgba(0, 0, 0, 0.6), 0 0 0 5px var(--panel-raised), 0 0 0 7px var(--line), 0 5px 12px rgba(0, 0, 0, 0.5);
}
.tool-binaural .dial-ring::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: radial-gradient(120% 80% at 35% 22%, rgba(255, 255, 255, 0.08), transparent 45%);
    pointer-events: none;
}
.tool-binaural .dial-needle {
    --needle-deg: -135deg;
    position: absolute;
    left: 50%;
    top: 50%;
    width: 2px;
    height: 50px;
    transform-origin: center bottom;
    transform: translate(-50%, -100%) rotate(var(--needle-deg));
    background: linear-gradient(#fff, var(--brass));
    box-shadow: 0 0 8px rgba(201, 154, 85, 0.7);
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    z-index: 2;
}
.tool-binaural .dial-cap {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle at 35% 30%, var(--brass-bright), var(--brass-deep) 80%);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
    z-index: 3;
}
.tool-binaural .dial-active-zone { font-family: var(--display); font-size: 0.92rem; color: var(--eye-bright); }
.tool-binaural .dial-legend { display: grid; gap: 4px; width: 100%; font-size: 0.76rem; color: var(--text-dim); }
.tool-binaural .dial-legend-row { display: flex; justify-content: space-between; }
.tool-binaural .dial-legend-row .swatch {
    width: 8px; height: 8px; border-radius: 50%; margin-right: 6px;
    display: inline-block; vertical-align: middle; box-shadow: 0 0 5px currentColor;
}

.tool-binaural .delta-bands { margin-top: 9px; padding: 9px; display: grid; grid-template-columns: 1fr 1fr; gap: 6px 10px; }
.tool-binaural .delta-band { font-size: 0.78rem; color: var(--text-dim); }
.tool-binaural .delta-band strong { color: var(--eye-bright); font-size: 0.78rem; letter-spacing: 0.03em; text-transform: uppercase; display: block; }

.tool-binaural .button-row { display: grid; gap: 12px; grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 18px; }

.tool-binaural .readout-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 18px; }
.tool-binaural .readout { padding: 11px; }
.tool-binaural .readout .k { display: block; color: var(--text-faint); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; font-weight: 600; }
.tool-binaural .readout .v { display: block; margin-top: 5px; font-family: var(--mono); font-size: 0.98rem; color: var(--eye-bright); }

.tool-binaural .protocol-builder { margin-top: 0; padding: 12px; display: grid; gap: 9px; }
.tool-binaural .protocol-topbar { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.tool-binaural .protocol-topbar strong { font-family: var(--display); color: var(--text); }
.tool-binaural .protocol-mini-actions { display: inline-flex; gap: 6px; }
.tool-binaural .protocol-help { display: none; border: 1px solid var(--line); border-radius: 5px; padding: 9px; background: var(--bg-0); color: var(--text-dim); font-size: 0.82rem; }
.tool-binaural .protocol-help.open { display: block; }
.tool-binaural .protocol-body { display: none; gap: 8px; }
.tool-binaural .protocol-body.open { display: grid; }
.tool-binaural .protocol-header { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.tool-binaural .protocol-rows { display: grid; gap: 6px; }
.tool-binaural .protocol-row { display: grid; grid-template-columns: 0.8fr 1fr 1fr; gap: 6px; }
.tool-binaural .protocol-input { font-family: var(--mono); font-size: 0.85rem; padding: 7px 8px; }
.tool-binaural textarea {
    width: 100%;
    background: radial-gradient(120% 90% at 50% 0%, #10151b, #05070a 75%);
    color: var(--eye-bright);
    font-family: var(--mono);
    font-size: 0.82rem;
    padding: 9px;
    resize: vertical;
}
.tool-binaural .protocol-actions { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 6px; }
.tool-binaural .protocol-note { color: var(--text-dim); font-size: 0.8rem; }

.tool-binaural .option-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.tool-binaural .option-card { padding: 10px 11px; display: grid; gap: 6px; position: relative; }
.tool-binaural .option-card.wide { grid-column: 1 / -1; }
.tool-binaural .option-card label { font-size: 0.8rem; color: var(--eye-bright); font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; }
.tool-binaural .ambience-inline { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; align-items: end; }

.tool-binaural .help-chip {
    position: absolute; right: 7px; top: 7px; width: 18px; height: 18px; border-radius: 50%;
    border: 1px solid var(--brass-deep); color: #201306; font-weight: 700; font-size: 0.72rem;
    display: inline-flex; align-items: center; justify-content: center;
    background: linear-gradient(180deg, var(--brass-bright), var(--brass-deep));
    cursor: help; user-select: none;
}
.tool-binaural .help-tooltip {
    position: absolute; right: 6px; top: 30px; width: min(250px, calc(100vw - 44px));
    border: 1px solid var(--line); border-radius: 6px; background: var(--bg-0); color: var(--text-dim);
    font-size: 0.78rem; line-height: 1.4; padding: 9px 10px; opacity: 0; transform: translateY(4px);
    pointer-events: none; transition: opacity 0.16s ease, transform 0.16s ease; z-index: 5;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
}
.tool-binaural .mix-card:hover .help-tooltip,
.tool-binaural .option-card:hover .help-tooltip { opacity: 1; transform: translateY(0); }

.tool-binaural .aux-btn { font-size: 0.84rem; padding: 9px; }
.tool-binaural .preset-close { padding: 8px 11px; font-size: 0.8rem; }

.tool-binaural .preset-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 10px; }
.tool-binaural .preset-tab { padding: 10px; text-align: center; text-transform: uppercase; letter-spacing: 0.06em; font-weight: 700; font-size: 0.88rem; }

.tool-binaural .adhd-insights { margin-bottom: 10px; border: 1px solid var(--line); border-radius: 6px; padding: 11px; background: var(--bg-1); }
.tool-binaural .adhd-insights p { margin: 0; color: var(--text-dim); font-size: 0.83rem; }
.tool-binaural .adhd-insights p + p { margin-top: 6px; }
.tool-binaural .adhd-insights strong { color: var(--eye-bright); }

.tool-binaural .adhd-filter-row { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 10px; }
.tool-binaural .adhd-filter-btn { padding: 9px 10px; text-align: center; font-size: 0.84rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; }

.tool-binaural .preset-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 9px; min-height: 520px; }

.tool-binaural .preset {
    border: 1px solid var(--line);
    background: var(--bg-1);
    color: var(--text);
    text-align: left;
    border-radius: var(--radius-sm);
    padding: 11px;
}
.tool-binaural .preset strong { display: block; margin-bottom: 2px; color: var(--text); font-size: 1rem; font-weight: 700; }
.tool-binaural .preset small { color: var(--text-dim); }
.tool-binaural .preset-meta { margin-top: 5px; display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap; }

.tool-binaural .preset.active {
    border-color: var(--brass);
    background: linear-gradient(180deg, rgba(201, 154, 85, 0.16), var(--bg-1));
    box-shadow: inset 0 0 0 1px rgba(201, 154, 85, 0.45), 0 0 16px rgba(201, 154, 85, 0.2);
}

.tool-binaural .noise-tag,
.tool-binaural .evidence-badge {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border-radius: 999px;
    padding: 3px 9px;
    border: 1px solid transparent;
}
.tool-binaural .noise-tag.brown { background: rgba(156, 112, 56, 0.28); border-color: var(--brass-deep); color: var(--brass-bright); }
.tool-binaural .noise-tag.pink { background: rgba(201, 105, 90, 0.24); border-color: var(--danger-deep); color: #f2c3ba; }
.tool-binaural .noise-tag.balanced { background: rgba(188, 217, 230, 0.16); border-color: var(--eye); color: var(--eye); }
.tool-binaural .noise-tag.pure { background: rgba(124, 182, 134, 0.2); border-color: var(--good); color: var(--good); }

.tool-binaural .evidence-strong { background: rgba(124, 182, 134, 0.2); border-color: var(--good); color: var(--good); }
.tool-binaural .evidence-mixed { background: rgba(201, 154, 85, 0.22); border-color: var(--brass); color: var(--brass-bright); }
.tool-binaural .evidence-experimental { background: rgba(201, 105, 90, 0.22); border-color: var(--danger); color: #f2c3ba; }

@media (max-width: 920px) {
    .tool-binaural .preset-grid { min-height: 460px; max-height: none; }
    .tool-binaural .preset-panel { width: calc(100vw - 20px); max-height: 92vh; }
}

@media (max-width: 620px) {
    .tool-binaural .button-row,
    .tool-binaural .readout-grid,
    .tool-binaural .preset-grid,
    .tool-binaural .delta-layout,
    .tool-binaural .delta-bands,
    .tool-binaural .aux-actions,
    .tool-binaural .frequency-pair,
    .tool-binaural .option-grid,
    .tool-binaural .ambience-inline,
    .tool-binaural .stereo-grid {
        grid-template-columns: 1fr;
    }
    .tool-binaural .option-card.wide { grid-column: auto; }
}

@media (hover: none), (pointer: coarse) {
    .tool-binaural .help-chip, .tool-binaural .help-tooltip { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    .tool-binaural .dial-needle { transition: none !important; }
}