/* yogasynth — tema scuro: i raggi cosmici devono essere la cosa piu'
   luminosa dello schermo, quindi tutto il resto sta indietro. */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #05060b;
    color: #e9ecf5;
    overflow: hidden;
    width: 100vw;
    height: 100vh;
}

#canvas-container {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #05060b;
}

/* Palco: riempie lo schermo. Quanto si vede del fotogramma lo decide il
   riquadro della camera (zoom e messa a fuoco), non un ritaglio CSS. */
#stage {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    touch-action: none;      /* il pizzico regola lo zoom, non la pagina */
}

#stage > * {
    position: absolute;
    top: 0;
    left: 0;
    display: block;
}

/* Il <video> non si vede mai: e' la sorgente della texture della scena.
   Non display:none, che in qualche browser blocca l'aggiornamento della
   VideoTexture; semplicemente fuori dallo schermo. */
.video-source {
    position: fixed;
    top: 0;
    left: -10000px;
    width: 2px;
    height: 2px;
    opacity: 0;
    pointer-events: none;
}

/* Il canvas WebGL lo aggiunge Stage e si assegna da solo z-index 2;
   l'HUD 2D resta sempre sopra. */
#stage > canvas { pointer-events: none; }
#hudCanvas { z-index: 3; }

/* ─── Pannelli ─────────────────────────────────────────────────────────── */

.top-left {
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 100;
}

.app-title-card {
    background: rgba(14, 16, 30, 0.8);
    border: 1px solid rgba(124, 77, 255, 0.5);
    border-radius: 10px;
    padding: 8px 14px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 8px;
    backdrop-filter: blur(8px);
    user-select: none;
}

.app-title-card .logo { color: #7C4DFF; font-size: 17px; }
.app-title-card .sub { color: #8b93ad; font-size: 11px; font-weight: 400; }

.asana-badge {
    margin-top: 8px;
    background: rgba(14, 16, 30, 0.75);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 12px;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: 999px;
    width: fit-content;
    backdrop-filter: blur(8px);
    user-select: none;
}

.chord-staff {
    position: fixed;
    top: 16px;
    right: 16px;
    background: rgba(14, 16, 30, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 6px 8px 4px;
    backdrop-filter: blur(8px);
    z-index: 100;
    line-height: 0;
}

.chord-staff .staff-chord {
    font-size: 12px;
    font-weight: 700;
    line-height: 1.4;
    text-align: center;
    color: #cbb6ff;
    letter-spacing: 0.04em;
}

.chord-staff svg { display: block; }

.status-bar {
    position: fixed;
    bottom: 18px;
    left: 16px;
    background: rgba(14, 16, 30, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 8px 14px;
    border-radius: 10px;
    font-size: 12.5px;
    color: #cfd5e6;
    backdrop-filter: blur(8px);
    z-index: 100;
    max-width: min(60vw, 420px);
}

.bottom-toggle-panel {
    position: fixed;
    bottom: 18px;
    right: 16px;
    display: flex;
    gap: 14px;
    background: rgba(14, 16, 30, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 8px 14px;
    border-radius: 10px;
    backdrop-filter: blur(8px);
    z-index: 100;
}

.toggle-container { display: flex; align-items: center; gap: 7px; }

.restart-button {
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.06);
    color: #e9ecf5;
    border-radius: 8px;
    padding: 5px 11px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
}
.restart-button:hover { border-color: #7C4DFF; background: rgba(124, 77, 255, 0.18); }
.toggle-label { font-size: 12px; color: #aab2c8; user-select: none; }

.toggle-switch {
    position: relative;
    width: 34px;
    height: 18px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.16);
    cursor: pointer;
    transition: background 0.18s;
    flex: none;
}
.toggle-switch.active { background: #7C4DFF; }
.toggle-switch input { display: none; }
.toggle-slider {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #fff;
    transition: transform 0.18s;
}
.toggle-switch.active .toggle-slider { transform: translateX(16px); }

.cast-card {
    position: fixed;
    bottom: 76px;
    right: 16px;
    background: rgba(14, 16, 30, 0.92);
    border: 1px solid rgba(124, 77, 255, 0.5);
    border-radius: 10px;
    padding: 10px 14px;
    backdrop-filter: blur(8px);
    z-index: 110;
    max-width: min(84vw, 360px);
}
.cast-card.hidden { display: none; }

/* Dentro il popup non e' una scheda fissa ma una parte del modulo. */
.cast-card.in-popup {
    position: static;
    max-width: none;
    margin: 4px 0 14px;
}
.cast-card.in-popup .cast-qr { width: 200px; }

.pair-button {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid rgba(124, 77, 255, 0.55);
    background: rgba(124, 77, 255, 0.14);
    color: #e9ecf5;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}
.pair-button:hover { background: rgba(124, 77, 255, 0.26); }
.pair-button[disabled] { opacity: 0.6; cursor: default; }
.cast-title { font-size: 12px; font-weight: 600; margin-bottom: 6px; }
.cast-card code {
    display: block;
    font-size: 13px;
    color: #9fe7ff;
    word-break: break-all;
    user-select: all;
}
.cast-note { font-size: 11px; color: #8b93ad; margin-top: 6px; line-height: 1.4; }
.cast-qr {
    width: 168px;
    margin: 10px auto 10px;
    background: #fff;       /* il lettore vuole moduli scuri su chiaro */
    border-radius: 8px;
    padding: 6px;
}
.cast-qr:empty { display: none; }
.cast-card .codice {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-weight: 700;
    color: #9fe7ff;
    letter-spacing: 0.04em;
}

/* ─── Caricamento ──────────────────────────────────────────────────────── */

.loading-container {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(10, 12, 24, 0.94);
    border: 1px solid rgba(124, 77, 255, 0.35);
    border-radius: 14px;
    padding: 26px 34px;
    text-align: center;
    z-index: 1200;
    display: none;
    min-width: 280px;
}
.loading-container.active { display: block; }
.loading-title { font-size: 17px; font-weight: 700; margin-bottom: 14px; letter-spacing: 0.06em; }

.progress-bar-container {
    width: 100%;
    height: 5px;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    overflow: hidden;
}
.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #7C4DFF, #00E5FF);
    transition: width 0.25s;
}
.progress-text { margin-top: 10px; font-size: 12px; color: #98a0b8; }

/* ─── Popup iniziale ───────────────────────────────────────────────────── */

.overlay {
    position: fixed;
    inset: 0;
    background: rgba(3, 4, 10, 0.82);
    z-index: 900;
}
.overlay.hidden, .legend-popup.hidden { display: none; }

.legend-popup {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(92vw, 520px);
    max-height: 88vh;
    overflow-y: auto;
    background: #0d0f1d;
    border: 1px solid rgba(124, 77, 255, 0.4);
    border-radius: 16px;
    padding: 24px;
    z-index: 1000;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.7);
}

.popup-header { margin-bottom: 14px; }
.popup-title { font-size: 21px; font-weight: 700; letter-spacing: 0.04em; }

.start-desc {
    color: #b9c0d4;
    font-size: 13.5px;
    line-height: 1.65;
    margin-bottom: 18px;
}
.start-desc b { color: #fff; font-weight: 600; }

.privacy {
    margin-top: 14px;
    padding: 10px 12px;
    border-radius: 8px;
    background: rgba(124, 77, 255, 0.1);
    border: 1px solid rgba(124, 77, 255, 0.25);
    font-size: 12px;
    line-height: 1.5;
    color: #b9c0d4;
}

.chord-preview {
    display: inline-block;
    margin-top: 6px;
    font-size: 12px;
    color: #cbb6ff;
}

.cam-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 13px;
    color: #cfd5e6;
}
.cam-row label { white-space: nowrap; }
.cam-row select {
    flex: 1;
    min-width: 0;
    padding: 7px 8px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 8px;
    font-size: 13px;
    color: #e9ecf5;
    background: #161a2e;
}
.cam-row button {
    border: 1px solid rgba(255, 255, 255, 0.16);
    background: #161a2e;
    color: #e9ecf5;
    border-radius: 8px;
    padding: 6px 9px;
    cursor: pointer;
    font-size: 13px;
}
.cam-row button:hover { border-color: #7C4DFF; }

.start-btn-row { display: flex; justify-content: center; margin-top: 6px; }

.load-button {
    background: linear-gradient(135deg, #7C4DFF, #00E5FF);
    color: #06070f;
    border: none;
    border-radius: 999px;
    padding: 12px 34px;
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.06em;
    cursor: pointer;
}
.load-button:hover { filter: brightness(1.08); }

/* ─── Modalita': automatica o libera ──────────────────────────────────── */

/* Ogni elemento che ha senso in una modalita' sola porta la sua classe; il
   body dice quale modalita' e' scelta. */
body.modo-libera .solo-auto,
body:not(.modo-libera) .solo-libera { display: none !important; }

.consiglio {
    margin-top: 14px;
    padding: 10px 12px;
    border-radius: 8px;
    background: rgba(0, 229, 255, 0.08);
    border: 1px solid rgba(0, 229, 255, 0.25);
    font-size: 12px;
    line-height: 1.5;
    color: #b9c0d4;
}

.lezione-azioni {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 8px;
}
.lezione-azioni .pair-button { flex: 0 0 auto; }
.spunta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: #cfd5e6;
    cursor: pointer;
    white-space: nowrap;
}
.spunta input { accent-color: #7C4DFF; }

@media (max-width: 768px) {
    .status-bar { left: 12px; right: 12px; bottom: 76px; max-width: none; }
    .cast-card { left: 12px; right: 12px; bottom: 132px; max-width: none; }
    .bottom-toggle-panel { left: 12px; right: 12px; bottom: 14px; justify-content: space-around; gap: 6px; }
    .top-left { top: 12px; left: 12px; }
    .chord-staff { top: 12px; right: 12px; }
}