/* ─────────────────────────────────────────────────────────────────────────────
   CrisperWhisper 2.0 — Demo UI
   ───────────────────────────────────────────────────────────────────────────── */

:root {
    --bg:            #FCFCFD;
    --bg-card:       #FFFFFF;
    --bg-dark:       #0A122F;
    --text:          #0A122F;
    --text-secondary: #4A5068;
    --text-muted:    #8890A4;
    --border:        #E4E5ED;
    --rule:          #D0D2DC;
    --accent:        #3949F5;
    --accent-light:  #616DF6;
    --accent-dim:    rgba(57,73,245,0.08);
    --accent-dark:   #222C93;
    --accent-dark-dim: rgba(34,44,147,0.10);
    --red:           #FF3B57;
    --red-soft:      #FF929D;
    --red-dim:       rgba(255,58,87,0.08);
    --green:         #52A68A;
    --green-dim:     rgba(82,166,138,0.10);
    --amber:         #E07B12;
    --amber-dim:     rgba(224,123,18,0.09);

    /* Disfluency tokens */
    --filler-bg:      rgba(255,58,87,0.09);
    --filler-text:    #D42B42;
    --filler-border:  rgba(255,58,87,0.22);
    --sound-bg:       rgba(34,44,147,0.09);
    --sound-text:     #222C93;
    --sound-border:   rgba(34,44,147,0.22);
    --cutoff-bg:      rgba(224,123,18,0.09);
    --cutoff-text:    #B5630A;
    --cutoff-border:  rgba(224,123,18,0.25);
    --repetition-bg:  rgba(57,73,245,0.08);
    --repetition-text: #2E3CC4;
    --repetition-border: rgba(57,73,245,0.22);
    --disfluent-bg:   rgba(136,144,164,0.10);
    --disfluent-text: #4A5068;
    --disfluent-border: rgba(136,144,164,0.28);

    --verbatim-accent: #E07B12;
    --intended-accent: #3949F5;

    --serif: 'Source Serif 4', Georgia, serif;
    --sans:  'DM Sans', -apple-system, system-ui, sans-serif;
    --mono:  'JetBrains Mono', 'Fira Code', monospace;
    --radius: 10px;
    --radius-sm: 6px;
    --radius-lg: 14px;
    --transition: 180ms ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--sans);
    background: transparent;
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

/* ─── Header ──────────────────────────────────────────────────────────────── */
.header {
    height: 58px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 36px;
    border-bottom: 1px solid var(--border);
    background: rgba(252,252,253,0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-shrink: 0;
    z-index: 100;
    position: sticky;
    top: 0;
}

.header-left { display: flex; align-items: center; }

.logo { display: flex; align-items: baseline; gap: 4px; }

.logo-text {
    font-family: var(--serif);
    font-size: 17px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text);
}

.logo-version {
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-dim);
    border: 1px solid rgba(57,73,245,0.2);
    padding: 1px 6px;
    border-radius: 4px;
    letter-spacing: 0.02em;
}

/* ─── Main ────────────────────────────────────────────────────────────────── */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* ─── Controls section — always visible, fixed layout ────────────────────── */
.controls-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 32px 36px 36px;
    border-bottom: 1px solid var(--border);
}

/* ─── Controls row ────────────────────────────────────────────────────────── */
.controls-row {
    display: flex;
    gap: 12px;
    align-items: center;
}

/* ─── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 22px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-family: var(--sans);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    box-shadow: 0 1px 3px rgba(10,18,47,0.04);
}
.btn:hover {
    border-color: #C0C3CF;
    color: var(--text);
    box-shadow: 0 4px 12px rgba(10,18,47,0.08);
    transform: translateY(-1px);
}

.btn-record {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(57,73,245,0.3);
}
.btn-record:hover {
    background: #2E3CC4;
    border-color: #2E3CC4;
    color: #fff;
    box-shadow: 0 6px 20px rgba(57,73,245,0.38);
    transform: translateY(-2px);
}
.btn-record.recording {
    background: var(--red);
    border-color: var(--red);
    animation: pulse-rec 1.8s ease-in-out infinite;
}

.btn-upload { cursor: pointer; }

.btn-stop {
    background: rgba(255,58,87,0.08);
    border-color: rgba(255,58,87,0.3);
    color: var(--red);
    padding: 10px 20px;
}
.btn-stop:hover {
    background: rgba(255,58,87,0.14);
    border-color: rgba(255,58,87,0.5);
    color: var(--red);
    transform: translateY(-1px);
}

.btn-run {
    background: var(--green);
    border-color: var(--green);
    color: #fff;
    font-weight: 600;
    padding: 10px 28px;
    box-shadow: 0 2px 8px rgba(82,166,138,0.3);
}
.btn-run:hover {
    background: #429577;
    border-color: #429577;
    color: #fff;
    box-shadow: 0 4px 14px rgba(82,166,138,0.38);
    transform: translateY(-1px);
}

.btn-disabled,
.btn-disabled:hover {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
    transform: none;
    box-shadow: none;
}

.btn-clear {
    padding: 8px 10px;
    border-color: transparent;
    background: transparent;
    color: var(--text-muted);
    box-shadow: none;
}
.btn-clear:hover {
    color: var(--red);
    background: var(--red-dim);
    border-color: transparent;
    box-shadow: none;
}

.btn-rerun {
    padding: 7px 16px;
    font-size: 13px;
}
.btn-rerun:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.header-actions { display: flex; gap: 8px; align-items: center; }
.btn-icon { flex-shrink: 0; }

@keyframes pulse-rec {
    0%, 100% { box-shadow: 0 0 0 0 rgba(255,58,87,0.4); }
    50%       { box-shadow: 0 0 0 10px rgba(255,58,87,0); }
}

/* ─── Samples ─────────────────────────────────────────────────────────────── */
.samples-row {
    display: flex; align-items: center; gap: 12px;
    margin-top: 22px; flex-wrap: wrap; justify-content: center;
}
.samples-label { font-size: 12px; color: var(--text-muted); }
.samples-list  { display: flex; gap: 8px; flex-wrap: wrap; }
.btn-sample {
    padding: 5px 14px; font-size: 12px; border-radius: 100px;
    background: var(--bg-card); border: 1.5px solid var(--border);
    color: var(--text-muted); cursor: pointer; font-family: var(--sans);
    transition: all var(--transition);
    box-shadow: 0 1px 3px rgba(10,18,47,0.04);
}
.btn-sample:hover {
    border-color: var(--accent); color: var(--accent);
    background: var(--accent-dim);
}

/* ─── Recording area ──────────────────────────────────────────────────────── */
.recording-area {
    display: flex; flex-direction: column;
    align-items: center; gap: 16px; margin-top: 26px;
}
#waveform-canvas {
    border-radius: var(--radius-lg);
    background: var(--bg-card);
    border: 1.5px solid var(--border);
}
.recording-timer {
    font-family: var(--mono);
    font-size: 32px; font-weight: 600;
    letter-spacing: -0.03em;
    color: var(--red);
}

/* ─── Ready bar ───────────────────────────────────────────────────────────── */
.ready-bar {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 22px;
    padding: 10px 18px;
    background: var(--green-dim);
    border: 1.5px solid rgba(82,166,138,0.25);
    border-radius: var(--radius);
}

.ready-file {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--green);
    flex: 1;
    min-width: 0;
}

.ready-filename {
    font-family: var(--mono);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ─── Settings Panel ──────────────────────────────────────────────────────── */
.settings-panel {
    display: flex; flex-direction: column; gap: 14px;
    margin-top: 24px; width: 100%; max-width: 480px;
    background: var(--bg-card);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    box-shadow: 0 1px 3px rgba(10,18,47,0.04), 0 8px 24px rgba(10,18,47,0.05);
}

.settings-row { display: flex; flex-direction: column; gap: 7px; }

.settings-label {
    font-size: 0.76rem; font-weight: 600;
    color: var(--text-muted);
    display: flex; align-items: center; gap: 6px;
    white-space: nowrap;
    text-transform: uppercase; letter-spacing: 0.05em;
}
.settings-hint {
    font-size: 10px; color: var(--text-muted);
    font-weight: 400; text-transform: none; letter-spacing: 0;
}

.language-select,
.settings-input,
.settings-textarea {
    background: var(--bg);
    color: var(--text);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    font-family: var(--sans);
    font-size: 13px;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition), opacity var(--transition);
}
.language-select { cursor: pointer; }
.settings-input  { width: 100%; }
.settings-textarea {
    width: 100%; resize: vertical;
    min-height: 76px; line-height: 1.55;
}
.language-select:focus,
.settings-input:focus,
.settings-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-dim);
}
.settings-input-disabled,
.settings-input[disabled],
.settings-textarea[disabled] { opacity: 0.35; cursor: not-allowed; }

.settings-row-disabled { opacity: 0.38; pointer-events: none; }

.hotwords-count {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text-muted);
    text-align: right;
    min-height: 16px;
}
.hotwords-count.at-limit { color: var(--red); font-weight: 600; }

/* ─── Toggle switch ───────────────────────────────────────────────────────── */
.settings-row-inline {
    flex-direction: row !important;
    align-items: center !important;
    justify-content: space-between;
}
.toggle-switch { position: relative; display: inline-flex; cursor: pointer; flex-shrink: 0; }
.toggle-switch input { opacity: 0; width: 0; height: 0; position: absolute; }
.toggle-track {
    width: 38px; height: 22px;
    background: #DDE0EA;
    border: 1.5px solid #C8CBDA;
    border-radius: 22px;
    transition: background var(--transition), border-color var(--transition);
    display: flex; align-items: center; padding: 2px;
}
.toggle-thumb {
    width: 16px; height: 16px; border-radius: 50%;
    background: #fff;
    box-shadow: 0 1px 3px rgba(10,18,47,0.18);
    transition: transform var(--transition);
}
.toggle-switch input:checked + .toggle-track {
    background: var(--accent);
    border-color: var(--accent);
}
.toggle-switch input:checked + .toggle-track .toggle-thumb {
    transform: translateX(16px);
}

/* ─── Output section (processing + results) ──────────────────────────────── */
.output-section {
    display: flex;
    flex-direction: column;
    padding: 36px 36px 48px;
    max-width: 1100px;
    width: 100%;
    margin: 0 auto;
    align-self: center;
}

/* Processing spinner */
.processing-area {
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    padding: 60px 24px; gap: 18px;
}
.spinner {
    width: 36px; height: 36px;
    border: 2.5px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.processing-text { color: var(--text-muted); font-size: 14px; letter-spacing: 0.01em; }

/* ─── Results ─────────────────────────────────────────────────────────────── */
.results-area { display: flex; flex-direction: column; }

.results-header {
    display: flex; align-items: center;
    justify-content: space-between;
    padding-bottom: 18px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap; gap: 12px;
}

.results-meta {
    display: flex; gap: 18px;
    font-size: 12px; color: var(--text-muted);
    font-family: var(--mono);
}

/* ─── Mode banners ────────────────────────────────────────────────────────── */
.mode-note {
    margin: 0 0 14px;
    padding: 10px 16px;
    background: rgba(224,123,18,0.07);
    border: 1.5px solid rgba(224,123,18,0.22);
    border-radius: var(--radius);
    font-size: 13px;
    color: var(--amber);
}
.mode-badge {
    display: inline-block; margin-bottom: 14px;
    padding: 3px 12px;
    background: var(--accent-dim);
    border: 1.5px solid rgba(57,73,245,0.2);
    border-radius: 100px;
    font-size: 11px; font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.04em;
    font-family: var(--mono);
}

/* ─── Diff container ──────────────────────────────────────────────────────── */
.diff-container {
    flex: none;
    background: var(--bg-card);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(10,18,47,0.04), 0 4px 16px rgba(10,18,47,0.04);
    position: relative;
}
.diff-container::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--verbatim-accent), var(--accent), var(--intended-accent));
}

.side-by-side-view { display: flex; gap: 0; }

.transcript-column {
    flex: 1; padding: 24px;
    background: transparent;
    overflow: hidden;
    position: relative;
}

.column-divider { width: 1px; background: var(--border); flex-shrink: 0; }

.column-header {
    display: flex; align-items: center; gap: 10px;
    margin-bottom: 20px; padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}
.column-accent { display: none; }
.column-header h3 {
    font-family: var(--sans);
    font-size: 0.76rem; font-weight: 700;
    letter-spacing: 0.06em; text-transform: uppercase;
    color: var(--text-muted);
}
.column-desc {
    font-size: 11px; color: var(--text-muted);
    margin-left: auto; letter-spacing: 0.02em;
}

/* Word flow */
.word-flow {
    font-size: 17px; line-height: 2.1;
    letter-spacing: -0.01em; color: var(--text);
    max-height: 420px; overflow-y: auto;
    padding-right: 4px;
}
.word-flow .word {
    display: inline;
    opacity: 0;
    animation: word-appear 250ms ease forwards;
}
.word-flow .word-space { display: inline; width: 0.3em; }

/* Disfluency pills */
.pill {
    display: inline-flex; align-items: center; gap: 3px;
    padding: 2px 8px; border-radius: 4px;
    font-size: 0.82em; font-weight: 600;
    position: relative; vertical-align: baseline;
    border: 1.5px solid transparent;
    font-family: var(--mono);
}
.pill-label {
    font-size: 8px; font-weight: 700; text-transform: uppercase;
    letter-spacing: 0.07em; opacity: 0.65;
    position: absolute; top: -13px; left: 2px; white-space: nowrap;
    font-family: var(--sans);
}
.pill.filler    { background: var(--filler-bg);     color: var(--filler-text);     border-color: var(--filler-border); }
.pill.sound     { background: var(--sound-bg);      color: var(--sound-text);      border-color: var(--sound-border); }
.pill.cutoff    { background: var(--cutoff-bg);     color: var(--cutoff-text);     border-color: var(--cutoff-border); }
.pill.repetition{ background: var(--repetition-bg); color: var(--repetition-text); border-color: var(--repetition-border); }
.pill.disfluent { background: var(--disfluent-bg);  color: var(--disfluent-text);  border-color: var(--disfluent-border); }

.pill.filler .pill-label    { color: var(--filler-text); }
.pill.sound .pill-label     { color: var(--sound-text); }
.pill.cutoff .pill-label    { color: var(--cutoff-text); }
.pill.repetition .pill-label{ color: var(--repetition-text); }
.pill.disfluent .pill-label { color: var(--text-muted); }

.word-gap {
    display: inline-block; width: 1.5em; height: 2px;
    background: var(--border); border-radius: 1px;
    vertical-align: middle; margin: 0 2px;
    opacity: 0; animation: word-appear 250ms ease forwards;
}

/* ─── Integrated Play Bar ─────────────────────────────────────────────────── */
.ts-play-bar {
    display: flex; align-items: center; gap: 14px;
    padding: 14px 24px;
    border-bottom: 1px solid var(--border);
    background: rgba(10,18,47,0.012);
    user-select: none;
}

.ts-play-btn {
    width: 34px; height: 34px; flex-shrink: 0;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    display: grid; place-items: center;
    cursor: pointer; color: #fff;
    transition: background var(--transition), box-shadow var(--transition), transform 80ms ease;
    box-shadow: 0 2px 6px rgba(57,73,245,0.28);
}
.ts-play-btn:hover {
    background: var(--accent-light);
    box-shadow: 0 3px 10px rgba(57,73,245,0.35);
}
.ts-play-btn:active { transform: scale(0.91); }
.ts-play-btn svg { width: 12px; height: 12px; fill: currentColor; pointer-events: none; }

.ts-progress-track {
    flex: 1; height: 4px; border-radius: 2px;
    background: var(--border);
    position: relative; cursor: pointer;
}
.ts-progress-fill {
    height: 100%; border-radius: 2px;
    background: var(--accent);
    width: 0%; transition: width 0.05s linear;
    position: relative;
}
.ts-progress-fill::after {
    content: ''; position: absolute; right: -5px; top: -4px;
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 3px rgba(57,73,245,0.18);
    opacity: 0; transition: opacity var(--transition);
}
.ts-progress-track:hover .ts-progress-fill::after { opacity: 1; }

.ts-time {
    font-family: var(--mono); font-size: 11px;
    color: var(--text-muted); white-space: nowrap;
    min-width: 80px; text-align: right;
}

.ts-speed-group { display: flex; gap: 3px; }
.ts-speed-btn {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 4px; padding: 3px 7px;
    font-size: 10px; font-weight: 600;
    color: var(--text-muted);
    cursor: pointer; font-family: var(--mono);
    transition: all var(--transition);
}
.ts-speed-btn:hover { border-color: var(--accent); color: var(--accent); background: rgba(57,73,245,0.05); }
.ts-speed-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ─── Inline verbatim word highlighting during playback ───────────────────── */
.word-flow .word.vw-linked,
.word-flow .pill.vw-linked {
    cursor: pointer;
    transition: all 0.1s ease;
}
.word-flow .word.vw-active {
    opacity: 1;
    background: rgba(57,73,245,0.12);
    color: var(--accent);
    font-weight: 600;
    border-radius: 3px;
    padding: 2px 3px;
    margin: 0 -3px;
    text-shadow: 0 0 12px rgba(57,73,245,0.2);
}
.word-flow .pill.vw-active {
    opacity: 1;
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    filter: brightness(1.05);
    text-shadow: 0 0 10px rgba(57,73,245,0.15);
}
.word-flow .word.vw-past,
.word-flow .pill.vw-past {
    opacity: 1;
}

/* ─── Audio Player (hidden) ───────────────────────────────────────────────── */
.audio-player { display: none; }

/* ─── Legend ───────────────────────────────────────────────────────────────── */
.legend {
    display: flex; gap: 22px; justify-content: center;
    margin-top: 20px; padding: 12px 0; flex-wrap: wrap;
}
.legend-item {
    display: flex; align-items: center; gap: 7px;
    font-size: 11px; color: var(--text-muted);
    letter-spacing: 0.02em;
}
.legend-pill {
    padding: 1px 8px; border-radius: 3px;
    font-size: 10px; font-weight: 600; font-family: var(--mono);
    border: 1.5px solid transparent;
}
.filler-pill     { background: var(--filler-bg);     color: var(--filler-text);     border-color: var(--filler-border); }
.sound-pill      { background: var(--sound-bg);      color: var(--sound-text);      border-color: var(--sound-border); }
.cutoff-pill     { background: var(--cutoff-bg);     color: var(--cutoff-text);     border-color: var(--cutoff-border); }
.repetition-pill { background: var(--repetition-bg); color: var(--repetition-text); border-color: var(--repetition-border); }
.disfluent-pill  { background: var(--disfluent-bg);  color: var(--disfluent-text);  border-color: var(--disfluent-border); }

/* ─── Animations ──────────────────────────────────────────────────────────── */
@keyframes word-appear {
    from { opacity: 0; transform: translateY(4px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ─── Scrollbars ──────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--rule); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #B0B3C2; }

/* ─── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .header { padding: 0 20px; }
    .controls-section { padding: 24px 20px 28px; }
    .output-section { padding: 24px 20px 36px; }
    .side-by-side-view { flex-direction: column; gap: 0; }
    .side-by-side-view .column-divider { width: auto; height: 1px; }
    .word-flow { font-size: 15px; }
    .settings-panel { max-width: 100%; }
    .ts-play-bar { padding: 12px 16px; }
    .ready-bar { flex-wrap: wrap; }
}


/* ═══════════════════════════════════════════════════════════════════════════
   AMBIENT BACKGROUND SYSTEM
   Three-layer composition: base gradient wash → floating orbs → wave field.
   Everything stays behind z-index 0 so it never competes with UI elements.
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Layer container ───────────────────────────────────────────────────── */
.bg-layer {
    position: fixed;
    inset: 0;
    z-index: -2;
    overflow: hidden;
    /* Clean arctic-blue base — bright at top, fades to near-white at centre */
    background: linear-gradient(
        168deg,
        #cce4f5 0%,
        #daeef9 18%,
        #eef6fc 40%,
        #f6fafd 58%,
        #edf4fb 78%,
        #d8ecf7 100%
    );
    pointer-events: none;
}

/* ─── Floating orbs ─────────────────────────────────────────────────────── */
.bg-orb {
    position: absolute;
    border-radius: 50%;
    will-change: transform;
    pointer-events: none;
}

/* Orb 1 — soft sky blue, upper-left */
.bg-orb-1 {
    width: 680px;
    height: 560px;
    top: -160px;
    left: -180px;
    background: radial-gradient(circle at 40% 40%,
        rgba(140, 195, 235, 0.30) 0%,
        rgba(165, 210, 242, 0.10) 55%,
        transparent 80%);
    filter: blur(80px);
    animation: orb-drift-1 140s ease-in-out infinite alternate;
}

/* Orb 2 — pale blue, lower-right */
.bg-orb-2 {
    width: 720px;
    height: 620px;
    bottom: -200px;
    right: -180px;
    background: radial-gradient(circle at 55% 55%,
        rgba(120, 170, 225, 0.26) 0%,
        rgba(145, 188, 232, 0.09) 55%,
        transparent 80%);
    filter: blur(90px);
    animation: orb-drift-2 175s ease-in-out infinite alternate;
}

/* Orb 3 — ice blue, mid-right */
.bg-orb-3 {
    width: 500px;
    height: 440px;
    top: 22%;
    right: 5%;
    background: radial-gradient(circle at 50% 45%,
        rgba(175, 215, 242, 0.20) 0%,
        rgba(190, 222, 246, 0.07) 60%,
        transparent 80%);
    filter: blur(68px);
    animation: orb-drift-3 155s ease-in-out infinite alternate;
}

/* Orb 4 — very faint blue, upper-right */
.bg-orb-4 {
    width: 380px;
    height: 340px;
    top: -50px;
    right: 15%;
    background: radial-gradient(circle at 45% 40%,
        rgba(165, 205, 238, 0.15) 0%,
        rgba(178, 215, 242, 0.05) 60%,
        transparent 80%);
    filter: blur(64px);
    animation: orb-drift-4 200s ease-in-out infinite alternate;
}

/* Orb 5 — whisper blue, lower-left */
.bg-orb-5 {
    width: 460px;
    height: 400px;
    bottom: 10%;
    left: 12%;
    background: radial-gradient(circle at 50% 50%,
        rgba(155, 205, 238, 0.18) 0%,
        rgba(170, 215, 242, 0.06) 60%,
        transparent 80%);
    filter: blur(75px);
    animation: orb-drift-5 185s ease-in-out infinite alternate;
}

@keyframes orb-drift-1 {
    0%   { transform: translate(0px, 0px)   scale(1.00); }
    33%  { transform: translate(28px, 42px) scale(1.03); }
    66%  { transform: translate(55px, 18px) scale(1.05); }
    100% { transform: translate(38px, 62px) scale(1.02); }
}

@keyframes orb-drift-2 {
    0%   { transform: translate(0px,  0px)    scale(1.00); }
    33%  { transform: translate(-36px, -28px) scale(1.04); }
    66%  { transform: translate(-60px, -12px) scale(1.06); }
    100% { transform: translate(-44px, -50px) scale(1.02); }
}

@keyframes orb-drift-3 {
    0%   { transform: translate(0px,  0px)   scale(1.00); }
    40%  { transform: translate(-22px, 38px) scale(1.03); }
    100% { transform: translate(-40px, 55px) scale(1.05); }
}

@keyframes orb-drift-4 {
    0%   { transform: translate(0px, 0px)   scale(1.00); }
    50%  { transform: translate(30px, 35px) scale(1.04); }
    100% { transform: translate(18px, 60px) scale(1.02); }
}

@keyframes orb-drift-5 {
    0%   { transform: translate(0px, 0px)    scale(1.00); }
    45%  { transform: translate(50px, -20px) scale(1.03); }
    100% { transform: translate(68px, -42px) scale(1.05); }
}

/* ─── Wave canvas ───────────────────────────────────────────────────────── */
.bg-waves {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    /* CSS blur feathers every ribbon edge for free — GPU compositor handles it */
    filter: blur(8px);
}

/* ─── Processing-state breathing halo ──────────────────────────────────── */
.bg-processing-halo {
    position: fixed;
    top: 56%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.85);
    width: 360px;
    height: 360px;
    border-radius: 50%;
    background: radial-gradient(circle,
        rgba(80, 140, 220, 0.13) 0%,
        rgba(100, 165, 230, 0.06) 50%,
        transparent 72%);
    filter: blur(28px);
    pointer-events: none;
    z-index: -1;
    opacity: 0;
    transition: opacity 1.0s ease, transform 1.0s ease;
}

body.state-processing .bg-processing-halo {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.0);
    animation: halo-breathe 4.2s ease-in-out infinite;
}

@keyframes halo-breathe {
    0%, 100% { transform: translate(-50%, -50%) scale(0.92); opacity: 0.75; }
    50%      { transform: translate(-50%, -50%) scale(1.18); opacity: 1.00; }
}

/* ─── Processing state — subtly enliven the orbs ───────────────────────── */
body.state-processing .bg-orb-2 {
    animation-duration: 20s;
    filter: blur(80px);
    opacity: 0.9;
}

/* ─── Settings panel — keep card surfaces crisp & readable ─────────────── */
.settings-panel {
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

/* Ensure header remains crisp over new background */
.header {
    background: rgba(240, 249, 255, 0.82);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom-color: rgba(185, 218, 240, 0.55);
}