/* ============================================================
   AuraFlow — Stile
   ============================================================ */

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

:root {
    --glass: rgba(255, 255, 255, 0.07);
    --glass-border: rgba(255, 255, 255, 0.14);
    --text: rgba(255, 255, 255, 0.92);
    --text-dim: rgba(255, 255, 255, 0.55);

    /* v0.92 — PALETTE DELL'INTERFACCIA, riscritta da app.js (`applyUiPalette`)
       a ogni cambio preset e a ogni tappa della Passeggiata.
       Prima erano valori fissi: i pannelli restavano blu navy (tinta 227°)
       mentre lo sfondo cambiava colore col preset. Misurato: solo 2 preset su
       12 erano in tinta — i peggiori a 177° e 173°, cioè il complementare
       esatto (Sogno a Occhi Aperti, Campane di Montagna).
       `--ui-bg` nasce dal colore `top` del preset, che è sempre scurissimo
       (luminanza 0.03-0.10): schiarito appena, il testo bianco resta leggibile
       su tutti e 12. `--ui-accent` viene da `accentHue`, che era già nei dati
       di ogni preset ma non lo usava nessun elemento dell'interfaccia. */
    --ui-bg:         rgba(12, 16, 30, 0.93);
    --ui-bg-side:    rgba(12, 16, 30, 0.86);
    --ui-opt-bg:     #141a2c;
    --ui-accent:     rgba(255, 255, 255, 0.92);
    --ui-accent-dim: rgba(255, 255, 255, 0.18);
}

html, body {
    height: 100%;
    overflow: hidden;
    font-family: "Segoe UI", system-ui, sans-serif;
    color: var(--text);
    background: #0a0e1c;
}

#viz {
    position: fixed;
    inset: 0;
    z-index: 0;
}

/* ---------- Barra superiore ---------- */
.top-bar {
    position: fixed;
    top: 0; left: 0; right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    /* safe-area: scende sotto la tacca/foro fotocamera (fullscreen immersivo) */
    padding-top: calc(18px + env(safe-area-inset-top));
    padding-right: calc(26px + env(safe-area-inset-right));
    padding-bottom: 18px;
    padding-left: calc(26px + env(safe-area-inset-left));
    z-index: 10;
}

.logo {
    font-size: 1.25rem;
    font-weight: 300;
    letter-spacing: 0.35em;
    text-transform: uppercase;
    opacity: 0.9;
}
.logo span { opacity: 0.6; }

.top-actions { display: flex; gap: 10px; align-items: center; }

.icon-btn, .donate-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 14px;
    border-radius: 22px;
    border: 1px solid var(--glass-border);
    background: var(--glass);
    color: var(--text);
    font-size: 0.85rem;
    cursor: pointer;
    text-decoration: none;
    backdrop-filter: blur(12px);
    transition: background 0.25s, transform 0.15s;
}
.icon-btn:hover, .donate-btn:hover {
    background: rgba(255, 255, 255, 0.16);
    transform: translateY(-1px);
}

/* ---------- Blocco centrale ---------- */
.center {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 18px;
    z-index: 5;
    pointer-events: none;
    padding: 0 20px clamp(48px, 9vh, 96px);   /* spazio sotto per le note attive, ma senza spingere il blocco troppo in alto (v0.92: era 120px fissi = 60px sopra il centro ottico) */
    text-align: center;
}
.center > * { pointer-events: auto; }

/* v0.92 — spostato SOTTO il titolo (nell'HTML): era in cima alla gerarchia
   visiva e largo quanto il titolo, per un'informazione tecnica. Ora e' una
   riga minore accanto alla funzione del preset. */
#brainwaveChip {
    font-size: 0.66rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text-dim);
    border: 1px solid var(--ui-accent-dim);
    background: var(--glass);
    border-radius: 20px;
    padding: 4px 13px;
    opacity: 0.75;
    backdrop-filter: blur(10px);
    transition: border-color .6s ease;
}

#presetTitle {
    font-size: clamp(2rem, 5.5vw, 3.4rem);
    font-weight: 200;
    letter-spacing: 0.06em;
    text-shadow: 0 2px 30px rgba(0, 0, 0, 0.45);
}

#presetSubtitle {
    font-size: 1rem;
    font-weight: 300;
    color: var(--text-dim);
    margin-top: -8px;
    max-width: 480px;
}

/* v0.92 — la <select> nativa resta nel DOM ma NASCOSTA: era l'elemento piu'
   fuori tono dell'app (su mobile apriva il picker di sistema, bianco, con i
   soli nomi in fila). Continua a essere la sorgente di verita' -- value,
   evento change, optgroup dei preset ★ -- cosi' tutta la logica esistente in
   app.js resta invariata; a guidarla e' il pannello #presetPanel. */
select#presetSelect { display: none; }

select#presetSelect.legacy-visible {
    appearance: none;
    -webkit-appearance: none;
    padding: 11px 42px 11px 20px;
    font-size: 0.95rem;
    color: var(--text);
    background: var(--glass) url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='white' stroke-opacity='.6' fill='none' stroke-width='1.5'/%3E%3C/svg%3E") no-repeat right 16px center;
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    backdrop-filter: blur(12px);
    cursor: pointer;
    outline: none;
}

/* ---------- Pulsante Play ---------- */
#playBtn {
    width: 92px;
    height: 92px;
    border-radius: 50%;
    border: 1px solid var(--glass-border);
    background: var(--glass);
    backdrop-filter: blur(14px);
    color: var(--text);
    font-size: 1.7rem;
    cursor: pointer;
    margin-top: 8px;
    transition: transform 0.2s, box-shadow 0.4s;
    box-shadow: 0 0 0 0 rgba(255, 255, 255, 0.12);
}
#playBtn:hover { transform: scale(1.06); }
#playBtn.playing {
    box-shadow: 0 0 44px 4px var(--ui-accent-dim);
    animation: pulse 5s ease-in-out infinite;
}
#playBtn.loading { opacity: 0.55; pointer-events: none; }
#playBtn.loading #playIcon { animation: spin 1.2s linear infinite; display: inline-block; }

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 30px 2px var(--ui-accent-dim); }
    50%       { box-shadow: 0 0 56px 8px var(--ui-accent-dim); }
}
@keyframes spin { to { transform: rotate(360deg); } }

#statusMsg {
    min-height: 1.4em;
    font-size: 0.85rem;
    color: var(--text-dim);
    letter-spacing: 0.05em;
}

/* ---------- Barra rapida sotto il preset ---------- */
#quickBar {
    display: flex;
    gap: 10px;
}
.quick-btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    background: var(--glass);
    color: var(--text-dim);
    font-size: 0.8rem;
    letter-spacing: 0.04em;
    cursor: pointer;
    backdrop-filter: blur(12px);
    transition: background .25s, color .25s, transform .15s, box-shadow .4s, border-color .25s;
}
.quick-btn:hover { transform: translateY(-1px); background: rgba(255, 255, 255, 0.14); }
.quick-btn .qb-ico { font-size: 0.98rem; opacity: 0.9; }
.quick-btn.active {
    /* v0.92: l'accento viene dal preset, non piu' bianco fisso */
    color: #fff;
    border-color: var(--ui-accent);
    background: rgba(255, 255, 255, 0.16);
    box-shadow: 0 0 20px var(--ui-accent-dim);
}

/* ---------- Pannello rapido volumi ---------- */
#mixBackdrop, #supportBackdrop, #presetBackdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s;
    z-index: 24;
}
#mixBackdrop.open, #supportBackdrop.open, #presetBackdrop.open { opacity: 1; pointer-events: auto; }
#mixPanel, #supportPanel, #presetPanel {
    position: fixed;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%) scale(0.96);
    width: min(360px, 90vw);
    background: var(--ui-bg);
    backdrop-filter: blur(22px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 20px 22px;
    z-index: 25;
    opacity: 0;
    pointer-events: none;
    transition: opacity .3s, transform .3s cubic-bezier(0.22, 1, 0.36, 1), background-color .6s ease;
}
#mixPanel.open, #supportPanel.open, #presetPanel.open { opacity: 1; pointer-events: auto; transform: translate(-50%, -50%) scale(1); }

/* Pannello Sostieni & Feedback: i tre link impilati e a tutta larghezza */
.support-links { display: flex; flex-direction: column; gap: 10px; }
.support-links .donate-btn {
    width: 100%;
    justify-content: flex-start;
    padding: 13px 16px;
    font-size: 0.95rem;
}
.support-links .donate-btn span { display: inline !important; }   /* mostra l'etichetta anche su mobile */
.mix-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    font-weight: 300;
    letter-spacing: 0.1em;
    font-size: 1rem;
}
.mix-head button { background: none; border: none; color: var(--text-dim); font-size: 1.3rem; cursor: pointer; }
.mix-head button:hover { color: var(--text); }
.mix-row {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}
.mix-row:last-child { margin-bottom: 0; }
.mix-row label {
    width: 92px;
    flex-shrink: 0;
    font-size: 0.78rem;
    color: var(--text-dim);
    letter-spacing: 0.04em;
}
.mix-row input[type="range"] { flex: 1; }

/* ---------- Strumenti in uso (righe per ruolo, chip vivi) ---------- */
#instrumentsBar {
    position: fixed;
    bottom: 16px;
    left: 0; right: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 7px;
    padding: 0 16px;
    z-index: 6;
    pointer-events: none;
    transition: opacity 2.2s ease;
}
.instr-row {
    display: flex;
    align-items: center;
    gap: 10px;
}
.row-label {
    width: 96px;
    text-align: right;
    font-size: 0.6rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--text-dim);
    opacity: 0.55;
}
.row-chips {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.instr-chip {
    padding: 6px 14px;
    border-radius: 16px;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(10px);
    color: var(--text-dim);
    font-size: 0.68rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    opacity: 0;
    animation: chipFloat 7s ease-in-out infinite;
    transition: opacity 1.4s ease, color 0.5s ease,
                box-shadow 0.9s ease, border-color 0.9s ease;
}
.instr-chip.shown { opacity: 0.75; }
.instr-chip.lit {
    color: #fff;
    border-color: rgba(255, 255, 255, 0.45);
    box-shadow: 0 0 22px rgba(255, 255, 255, 0.28);
    transition: opacity 1.4s ease, color 0.15s ease,
                box-shadow 0.2s ease, border-color 0.2s ease;
}
.instr-chip.leaving { opacity: 0; transition: opacity 2.5s ease; }
@keyframes chipFloat {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-6px); }
}
body.ui-idle #instrumentsBar { opacity: 0.45; }
@media (max-width: 560px) {
    .row-label { width: 70px; font-size: 0.55rem; }
}

/* ---------- Pannello impostazioni ---------- */
#settingsPanel {
    position: fixed;
    top: 0; right: 0;
    height: 100%;
    width: min(340px, 88vw);
    background: var(--ui-bg-side);
    backdrop-filter: blur(22px);
    border-left: 1px solid var(--glass-border);
    transition: background-color .6s ease, transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    z-index: 20;
    padding: 26px;
    transform: translateX(105%);
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
    overflow-y: auto;
}
#settingsPanel.open { transform: translateX(0); }

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}
.panel-header h2 { font-weight: 300; letter-spacing: 0.12em; font-size: 1.1rem; }
#closeSettings {
    background: none; border: none; color: var(--text-dim);
    font-size: 1.4rem; cursor: pointer;
}
#closeSettings:hover { color: var(--text); }

.setting { margin-bottom: 18px; }
.setting label {
    display: flex;
    justify-content: space-between;
    font-size: 0.84rem;
    color: var(--text-dim);
    margin-bottom: 7px;
    letter-spacing: 0.04em;
}

input[type="range"] {
    width: 100%;
    appearance: none;
    -webkit-appearance: none;
    height: 4px;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.18);
    outline: none;
}
input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    -webkit-appearance: none;
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--ui-accent);
    box-shadow: 0 0 10px var(--ui-accent-dim);
    cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--ui-accent);
    border: none;
    cursor: pointer;
}

.setting select {
    width: 100%;
    padding: 9px 14px;
    background: var(--glass);
    color: var(--text);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    outline: none;
    transition: border-color .6s ease;
}
.setting select:focus-visible { border-color: var(--ui-accent); }
.setting select option { background: var(--ui-opt-bg); color: #eee; }   /* v0.92b: era #141a2c fisso e vinceva sulla cascata */

.panel-divider {
    border: none;
    border-top: 1px solid var(--glass-border);
    margin: 22px 0;
}

.panel-note {
    font-size: 0.74rem;
    color: var(--text-dim);
    line-height: 1.5;
}

/* ---------- Switch (binaurale) ---------- */
.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.setting-row label { margin-bottom: 0; flex: 1; }
input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 42px; height: 24px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.18);
    position: relative;
    cursor: pointer;
    transition: background 0.25s;
    flex-shrink: 0;
}
input[type="checkbox"]::after {
    content: "";
    position: absolute;
    top: 3px; left: 3px;
    width: 18px; height: 18px;
    border-radius: 50%;
    background: #fff;
    transition: transform 0.25s;
}
/* v0.92b: acceso = accento del preset (era un azzurro fisso rgba(140,180,255):
   su Campane di Montagna o Velluto restava blu in mezzo a pannelli caldi) */
input[type="checkbox"] { transition: background 0.25s, box-shadow .4s; }
input[type="checkbox"]:checked {
    background: var(--ui-accent);
    box-shadow: 0 0 14px var(--ui-accent-dim);
}
input[type="checkbox"]:checked::after { transform: translateX(18px); }

/* ---------- UI che sfuma durante l'ascolto ---------- */
.top-bar, .center {
    transition: opacity 2.2s ease;
}
body.ui-idle .top-bar,
body.ui-idle .center {
    opacity: 0;
    pointer-events: none;
}
body.ui-idle { cursor: none; }

/* ---------- Mobile ---------- */
@media (max-width: 560px) {
    .top-bar {
        padding-top: calc(12px + env(safe-area-inset-top));
        padding-right: calc(14px + env(safe-area-inset-right));
        padding-bottom: 12px;
        padding-left: calc(14px + env(safe-area-inset-left));
    }
    .donate-btn span.txt { display: none; }
    .logo { font-size: 1rem; letter-spacing: 0.25em; }

    /* quickBar: su mobile solo icone (stesso pattern del ☕ qui sopra) —
       4 pillole con testo sforavano lo schermo */
    .quick-btn .qb-txt { display: none; }
    .quick-btn { padding: 10px 14px; }
    .quick-btn .qb-ico { font-size: 1.1rem; }
}


/* ---------- Selettore preset (v0.92) ---------- */
#presetBtn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 11px 20px;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    background: var(--glass);
    color: var(--text);
    font-size: 0.95rem;
    letter-spacing: 0.03em;
    cursor: pointer;
    backdrop-filter: blur(12px);
    transition: background .25s, border-color .6s ease, transform .15s;
}
#presetBtn:hover { background: rgba(255, 255, 255, 0.14); transform: translateY(-1px); }
#presetBtn .pb-dot {
    width: 9px; height: 9px; border-radius: 50%;
    background: var(--ui-accent);
    box-shadow: 0 0 10px var(--ui-accent);
    flex-shrink: 0;
}
#presetBtn .pb-caret { opacity: 0.5; font-size: 0.7rem; }

#presetPanel { padding: 18px 14px 14px; }
#presetList {
    display: flex;
    flex-direction: column;
    gap: 2px;
    max-height: min(62vh, 460px);
    overflow-y: auto;
    margin: 0 -4px;
    padding: 0 4px;
}
.preset-item {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 10px 12px;
    border: 1px solid transparent;
    border-radius: 12px;
    background: none;
    color: var(--text);
    text-align: left;
    cursor: pointer;
    font: inherit;
    transition: background .18s, border-color .18s;
}
.preset-item:hover { background: rgba(255, 255, 255, 0.07); }
.preset-item.current {
    border-color: var(--ui-accent);
    background: rgba(255, 255, 255, 0.09);
}
.preset-item .pi-dot {
    width: 10px; height: 10px; border-radius: 50%;
    flex-shrink: 0;
}
.preset-item .pi-txt { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.preset-item .pi-name { font-size: 0.92rem; letter-spacing: 0.02em; }
.preset-item .pi-sub {
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 0.04em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}