/* Qubibyte NMR spectrometer. Colours come from the site theme tokens in /css/themes.css
   with fallbacks for the dark look; plots and 3D scenes read the --n-* tokens at draw time. */

:root {
    --n-bg: var(--bg-primary, #0f172a);
    --n-surface: var(--bg-card, #151c30);
    --n-surface-2: var(--bg-surface, #1c2540);
    --n-plot-bg: var(--bg-surface, #0b1020);
    --n-text: var(--text-primary, #f1f5f9);
    --n-text-2: var(--text-secondary, #cbd5e1);
    --n-muted: var(--text-muted, #94a3b8);
    --n-border: var(--border-default, rgba(148, 163, 184, 0.28));
    --n-border-soft: var(--border-subtle, rgba(148, 163, 184, 0.14));
    --n-grid: rgba(148, 163, 184, 0.14);
    --n-accent: #6366f1;
    --n-accent-2: #a855f7;
    --n-pos: #38bdf8;
    --n-neg: #f43f5e;
    --n-ok: #22c55e;
    --n-warn: #f59e0b;
    --n-shadow: rgba(0, 0, 0, 0.35);
}

html[data-theme="light"] {
    --n-bg: var(--bg-primary, #f3f4f8);
    --n-surface: var(--bg-card, #ffffff);
    --n-surface-2: var(--bg-surface, #eef0f6);
    --n-plot-bg: #fbfbfe;
    --n-text: var(--text-primary, #0f172a);
    --n-text-2: var(--text-secondary, #334155);
    --n-muted: var(--text-muted, #64748b);
    --n-border: var(--border-default, rgba(15, 23, 42, 0.16));
    --n-border-soft: var(--border-subtle, rgba(15, 23, 42, 0.08));
    --n-grid: rgba(15, 23, 42, 0.08);
    --n-accent: #4f46e5;
    --n-accent-2: #9333ea;
    --n-pos: #0284c7;
    --n-neg: #e11d48;
    --n-ok: #15803d;
    --n-warn: #b45309;
    --n-shadow: rgba(15, 23, 42, 0.15);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body.nmr-page {
    margin: 0;
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--n-bg);
    color: var(--n-text);
    font-size: 13px;
    line-height: 1.45;
}

.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 18px;
    border-bottom: 1px solid var(--n-border);
    background: var(--n-surface);
    flex-wrap: wrap;
}

.title-section {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo { height: 38px; }

html[data-theme="light"] .logo { filter: invert(1) hue-rotate(180deg); }

.title {
    margin: 0;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.subtitle {
    margin: 2px 0 0;
    color: var(--n-muted);
    font-size: 12px;
}

.header-controls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 7px 14px;
    border-radius: 8px;
    border: 1px solid var(--n-border);
    background: var(--n-surface-2);
    color: var(--n-text);
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
}

.btn:hover { border-color: var(--n-accent); }
.btn-primary { background: var(--n-accent); border-color: var(--n-accent); color: #fff; }
.btn-primary:hover { filter: brightness(1.1); }
.btn-ghost { background: transparent; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn[aria-pressed="true"] { background: var(--n-accent); color: #fff; border-color: var(--n-accent); }

.boot-error {
    margin: 0;
    padding: 12px 18px;
    background: rgba(244, 63, 94, 0.15);
    color: var(--n-text);
}

/* layout */
.main {
    display: grid;
    grid-template-columns: 290px minmax(0, 1fr) 330px;
    gap: 12px;
    padding: 12px;
    flex: 1;
    min-height: 0;
}

.panel {
    background: var(--n-surface);
    border: 1px solid var(--n-border);
    border-radius: 12px;
    min-width: 0;
}

.panel-left, .panel-right {
    overflow: auto;
    max-height: calc(100vh - 84px);
    padding: 6px 0 10px;
}

.panel-center {
    display: flex;
    flex-direction: column;
    min-height: 560px;
    max-height: calc(100vh - 84px);
    overflow: hidden;
}

.section {
    padding: 12px 14px;
    border-bottom: 1px solid var(--n-border-soft);
}

.section:last-child { border-bottom: none; }

.section-title {
    margin: 0 0 10px;
    font-size: 11.5px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--n-muted);
    font-weight: 700;
}

.control-group { margin-bottom: 10px; }
.control-group.inline { display: flex; align-items: center; gap: 8px; }
.control-group.inline .control-label { margin: 0; flex: 1; }
.control-group.inline-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

.control-label {
    display: block;
    font-size: 12px;
    color: var(--n-text-2);
    margin-bottom: 4px;
}

.slider-container { display: flex; align-items: center; gap: 10px; }

.slider {
    flex: 1;
    accent-color: var(--n-accent);
    min-width: 0;
}

.slider-short { width: 90px; flex: none; }

.slider-value {
    min-width: 62px;
    text-align: right;
    font-family: 'JetBrains Mono', ui-monospace, Consolas, monospace;
    font-size: 12px;
    color: var(--n-text);
    white-space: nowrap;
}

.select, .input-small, .input-tiny {
    width: 100%;
    background: var(--n-bg);
    color: var(--n-text);
    border: 1px solid var(--n-border);
    border-radius: 7px;
    padding: 6px 8px;
    font: inherit;
    font-size: 12.5px;
}

.select:focus, .input-small:focus, .input-tiny:focus { outline: 2px solid var(--n-accent); outline-offset: 0; }
.input-small { width: 80px; }
.input-tiny { width: 64px; }
.select-tiny { width: auto; }
.unit { color: var(--n-muted); }

.info-text {
    margin-top: 4px;
    font-size: 11.5px;
    line-height: 1.4;
    color: var(--n-muted);
}

.info-warn { color: var(--n-warn); }

.toggle-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.toggle-row .control-label { margin: 0; }

.toggle { position: relative; display: inline-block; width: 38px; height: 22px; flex-shrink: 0; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-slider { position: absolute; inset: 0; background: var(--n-surface-2); border: 1px solid var(--n-border); border-radius: 999px; cursor: pointer; transition: background 0.2s; }
.toggle-slider::before { content: ''; position: absolute; width: 16px; height: 16px; left: 2px; top: 2px; background: var(--n-muted); border-radius: 50%; transition: transform 0.2s, background 0.2s; }
.toggle input:checked + .toggle-slider { background: var(--n-accent); border-color: var(--n-accent); }
.toggle input:checked + .toggle-slider::before { transform: translateX(16px); background: #fff; }
.toggle input:focus-visible + .toggle-slider { outline: 2px solid var(--n-accent); }

.toggle-inline { display: inline-flex; align-items: center; gap: 6px; color: var(--n-text-2); }

.kv { display: grid; gap: 4px; margin-top: 6px; }
.kv div { display: flex; justify-content: space-between; gap: 10px; font-size: 12px; padding: 4px 8px; border-radius: 6px; background: var(--n-surface-2); }
.kv span { color: var(--n-muted); }
.kv b { font-weight: 600; font-family: 'JetBrains Mono', ui-monospace, Consolas, monospace; font-size: 11.5px; text-align: right; }

.pulse-diagram { margin-top: 8px; overflow-x: auto; background: var(--n-plot-bg); border: 1px solid var(--n-border-soft); border-radius: 8px; padding: 4px; }
.ps-diagram { display: block; }

/* centre */
.viz-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 2px;
    padding: 8px 10px 0;
    border-bottom: 1px solid var(--n-border-soft);
}

.viz-tab {
    background: transparent;
    color: var(--n-muted);
    border: none;
    border-bottom: 2px solid transparent;
    padding: 8px 12px;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
}

.viz-tab:hover { color: var(--n-text); }
.viz-tab[aria-selected="true"] { color: var(--n-text); border-bottom-color: var(--n-accent); }

.viz-panel {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    padding: 10px;
    gap: 8px;
}

.viz-panel[hidden] { display: none; }

.canvas-3d {
    flex: 1;
    min-height: 320px;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--n-border-soft);
    position: relative;
}

.canvas-3d canvas { display: block; width: 100% !important; height: 100% !important; }

.canvas-wrap {
    position: relative;
    flex: 1;
    min-height: 300px;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--n-border-soft);
    background: var(--n-plot-bg);
}

.plot { display: block; width: 100%; height: 100%; touch-action: none; }

.canvas-tip {
    position: absolute;
    z-index: 4;
    background: var(--n-surface);
    border: 1px solid var(--n-border);
    border-radius: 8px;
    padding: 6px 10px;
    font-size: 12px;
    color: var(--n-text-2);
    box-shadow: 0 8px 24px var(--n-shadow);
    pointer-events: none;
    max-width: 240px;
}

.canvas-tip b { color: var(--n-text); }

.legend {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 14px;
    font-size: 11.5px;
    color: var(--n-muted);
    align-items: center;
}

.legend-text { display: block; }
.legend-hint { margin-left: auto; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.sw { display: inline-block; width: 12px; height: 12px; border-radius: 3px; }
.sw-n { background: #ef4444; }
.sw-s { background: #3b82f6; }
.sw-coil { background: #d97706; }
.sw-sample { background: #38bdf8; }
.sw-field { background: #22c55e; }

.plot-tools { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
.plot-tools .spacer { flex: 1; }

.tbtn {
    background: transparent;
    color: var(--n-text-2);
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 4px 9px;
    font: inherit;
    font-size: 12px;
    cursor: pointer;
}

.tbtn:hover { background: var(--n-surface-2); color: var(--n-text); }
.tbtn[aria-pressed="true"] { background: color-mix(in srgb, var(--n-accent) 22%, transparent); border-color: color-mix(in srgb, var(--n-accent) 50%, transparent); color: var(--n-text); }

.bloch-controls { display: flex; flex-direction: column; gap: 8px; }
.bloch-row { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; }
.bloch-row label { display: inline-flex; align-items: center; gap: 6px; color: var(--n-text-2); font-size: 12px; }
.bloch-readout { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 6px; }
.bloch-readout div { background: var(--n-surface-2); border-radius: 8px; padding: 6px 4px; text-align: center; }
.bloch-readout .val { display: block; font-family: 'JetBrains Mono', ui-monospace, Consolas, monospace; font-size: 13px; color: var(--n-text); }
.bloch-readout .lbl { display: block; font-size: 10.5px; color: var(--n-muted); }

.table-wrap { max-height: 260px; overflow: auto; border: 1px solid var(--n-border-soft); border-radius: 8px; margin-top: 8px; }
.peak-table { width: 100%; border-collapse: collapse; font-size: 11.5px; }
.peak-table th, .peak-table td { padding: 5px 7px; text-align: left; border-bottom: 1px solid var(--n-border-soft); white-space: nowrap; }
.peak-table th { position: sticky; top: 0; background: var(--n-surface); color: var(--n-muted); font-weight: 600; font-size: 10.5px; }
.peak-table td.num { font-family: 'JetBrains Mono', ui-monospace, Consolas, monospace; text-align: right; }
.peak-table tr[data-key] { cursor: pointer; }
.peak-table tr[data-key]:hover td { background: var(--n-surface-2); }
.peak-table tr.peak-solvent td { color: var(--n-muted); font-style: italic; }
.row-end { display: flex; justify-content: flex-end; margin-top: 6px; }

/* popups */
.peak-popup {
    position: fixed;
    z-index: 50;
    width: 280px;
    background: var(--n-surface);
    border: 1px solid var(--n-border);
    border-radius: 10px;
    padding: 10px 12px;
    box-shadow: 0 12px 32px var(--n-shadow);
    font-size: 12px;
}

.pp-title { display: flex; align-items: center; gap: 8px; font-weight: 700; margin-bottom: 6px; }
.pp-title small { color: var(--n-muted); font-weight: 400; }
.pp-close { margin-left: auto; background: transparent; border: none; color: var(--n-muted); cursor: pointer; font-size: 13px; }
.pp-row { display: flex; justify-content: space-between; gap: 10px; color: var(--n-muted); padding: 2px 0; }
.pp-row b { color: var(--n-text); font-weight: 600; text-align: right; }
.pp-lines { margin-top: 6px; border-top: 1px solid var(--n-border-soft); padding-top: 6px; font-family: 'JetBrains Mono', ui-monospace, Consolas, monospace; font-size: 11px; }
.pp-line { display: grid; grid-template-columns: 1fr 1fr 0.6fr; gap: 6px; color: var(--n-text-2); }
.pp-more { color: var(--n-muted); font-family: inherit; }

.toast {
    position: fixed;
    left: 50%;
    bottom: 22px;
    transform: translateX(-50%);
    background: var(--n-surface);
    color: var(--n-text);
    border: 1px solid var(--n-border);
    border-radius: 999px;
    padding: 8px 16px;
    box-shadow: 0 10px 30px var(--n-shadow);
    z-index: 60;
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 70;
    background: rgba(0, 0, 0, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal[hidden] { display: none; }

.modal-content {
    width: min(760px, 100%);
    max-height: 90vh;
    overflow: auto;
    background: var(--n-surface);
    border: 1px solid var(--n-border);
    border-radius: 14px;
    padding: 20px 22px;
    box-shadow: 0 20px 60px var(--n-shadow);
}

.modal-content h3 { margin: 0 0 12px; font-size: 18px; }
.tutorial .step { margin-bottom: 14px; }
.tutorial h4 { margin: 0 0 4px; font-size: 13.5px; color: var(--n-accent-2); }
.tutorial p { margin: 0; color: var(--n-text-2); }
.modal-buttons { display: flex; justify-content: flex-end; margin-top: 10px; }

/* responsive */
@media (max-width: 1180px) {
    .main { grid-template-columns: 250px minmax(0, 1fr) 290px; }
}

@media (max-width: 960px) {
    .main { grid-template-columns: minmax(0, 1fr); }
    .panel-left, .panel-right, .panel-center { max-height: none; }
    .panel-center { min-height: 480px; }
    .header { position: static; }
    .bloch-readout { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 560px) {
    .header-controls .btn-ghost { display: none; }
    .title { font-size: 17px; }
    .subtitle { display: none; }
    .control-group.inline-2 { grid-template-columns: 1fr; }
}