/* ============================================================
   Spectral — an instrument for ghosts
   ============================================================ */

:root {
    --bg: #05060a;
    --bg-2: #0b0d16;
    --ink: #d9dce6;
    --ink-dim: #7c8197;
    --ink-faint: #3b3f52;
    --wisp: #b8f2ff;
    --wisp-glow: rgba(184, 242, 255, 0.55);
    --drift: #8fd3ff;   /* pad      */
    --haunt: #c9a6ff;   /* bell     */
    --knock: #ffb27a;   /* perc     */
    --wail:  #9effc9;   /* theremin */
    --ember: #ff8a4c;
    --line: rgba(217, 220, 230, 0.08);
    --serif: "Cormorant Garamond", Georgia, serif;
    --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}

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

html, body {
    height: 100%;
    background: var(--bg);
    color: var(--ink);
    font-family: var(--serif);
    overflow: hidden;
}

/* ------------------------------------------------------------
   Atmosphere: fog + vignette
   ------------------------------------------------------------ */
.fog {
    position: fixed;
    inset: -20%;
    pointer-events: none;
    z-index: 1;
    opacity: 0.55;
    background:
            radial-gradient(60% 50% at 20% 70%, rgba(143, 211, 255, 0.10), transparent 60%),
            radial-gradient(50% 60% at 80% 30%, rgba(201, 166, 255, 0.08), transparent 60%),
            radial-gradient(70% 40% at 50% 100%, rgba(255, 178, 122, 0.05), transparent 70%);
    filter: blur(40px);
    animation: fogDrift 38s ease-in-out infinite alternate;
}
.fog-2 {
    opacity: 0.35;
    animation-duration: 52s;
    animation-direction: alternate-reverse;
    background:
            radial-gradient(50% 50% at 70% 80%, rgba(184, 242, 255, 0.08), transparent 60%),
            radial-gradient(40% 50% at 25% 20%, rgba(201, 166, 255, 0.06), transparent 60%);
}
@keyframes fogDrift {
    0%   { transform: translate(-3%, 2%) scale(1); }
    50%  { transform: translate(3%, -2%) scale(1.06); }
    100% { transform: translate(-2%, 3%) scale(1.02); }
}

.vignette {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 2;
    background: radial-gradient(ellipse at center, transparent 45%, rgba(0, 0, 0, 0.75) 100%);
}

/* ------------------------------------------------------------
   Start overlay
   ------------------------------------------------------------ */
#start-overlay {
    position: fixed;
    inset: 0;
    z-index: 50;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 24px 16px;
    background: rgba(5, 6, 10, 0.78);
    backdrop-filter: blur(6px);
    transition: opacity 1.2s ease, visibility 1.2s;
}
#start-overlay.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
#start-overlay .start-card { margin: auto; flex-shrink: 0; }

.start-card {
    width: min(580px, 100%);
    padding: 40px 36px 28px;
    border: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(11, 13, 22, 0.9), rgba(5, 6, 10, 0.95));
    box-shadow:
            0 0 0 1px rgba(184, 242, 255, 0.04),
            0 30px 80px rgba(0, 0, 0, 0.6),
            inset 0 0 120px rgba(143, 211, 255, 0.03);
    text-align: center;
    animation: cardRise 1.6s ease-out both;
}
@keyframes cardRise {
    from { opacity: 0; transform: translateY(18px); filter: blur(6px); }
    to   { opacity: 1; transform: none; filter: none; }
}

.eyebrow {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--ink-dim);
    margin-bottom: 14px;
}

.start-card h1 {
    font-weight: 400;
    font-size: clamp(48px, 9vw, 76px);
    letter-spacing: 0.08em;
    line-height: 1;
    color: var(--wisp);
    text-shadow: 0 0 18px var(--wisp-glow), 0 0 60px rgba(184, 242, 255, 0.25);
    animation: breathe 5s ease-in-out infinite;
}
@keyframes breathe {
    0%, 100% { text-shadow: 0 0 18px var(--wisp-glow), 0 0 60px rgba(184,242,255,0.25); }
    50%      { text-shadow: 0 0 28px var(--wisp-glow), 0 0 90px rgba(184,242,255,0.40); }
}

.tagline {
    margin: 18px 0 28px;
    font-size: 19px;
    font-style: italic;
    line-height: 1.5;
    color: var(--ink);
}

.rite {
    text-align: left;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 16px 4px;
    margin-bottom: 28px;
}
.rite-row {
    display: grid;
    grid-template-columns: 34px 1fr;
    gap: 12px;
    align-items: start;
    padding: 7px 0;
    font-size: 15.5px;
    line-height: 1.45;
    color: var(--ink-dim);
}
.rite-row b { color: var(--ink); font-weight: 600; }
.rite-row i { color: var(--wisp); }
.sigil {
    font-family: var(--mono);
    color: var(--wisp);
    opacity: 0.8;
    text-align: center;
    line-height: 1.45;
    font-size: 14px;
}

#start-btn {
    font-family: var(--serif);
    font-size: 20px;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    padding: 14px 40px 12px 44px;
    color: var(--bg);
    background: var(--wisp);
    border: 0;
    cursor: pointer;
    box-shadow: 0 0 24px var(--wisp-glow), 0 0 70px rgba(184, 242, 255, 0.2);
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}
#start-btn:hover {
    transform: translateY(-1px);
    background: #e6fbff;
    box-shadow: 0 0 36px var(--wisp-glow), 0 0 110px rgba(184, 242, 255, 0.35);
}
#start-btn:active { transform: translateY(1px); }
#start-btn:disabled { opacity: 0.4; cursor: wait; box-shadow: none; }

.status {
    margin-top: 16px;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--ink-dim);
    min-height: 1.4em;
}
.status.error { color: var(--ember); }

.footnote {
    margin-top: 18px;
    font-size: 12.5px;
    font-style: italic;
    color: var(--ink-faint);
}

/* ------------------------------------------------------------
   Stage
   ------------------------------------------------------------ */
#stage {
    position: fixed;
    inset: 0;
    z-index: 5;
}

#webcam {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scaleX(-1);            /* mirror so it feels like a mirror */
    filter: grayscale(1) contrast(1.15) brightness(0.45);
    opacity: 0.55;
}

#overlay {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

/* ------------------------------------------------------------
   Player lanes (bottom-left = P1, bottom-right = P2)
   ------------------------------------------------------------ */
#voices {
    position: absolute;
    left: 18px; right: 18px; bottom: 44px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 16px;
    pointer-events: none;
    transition: opacity 0.6s;
}
#voices.hidden { opacity: 0; }

.lane {
    --ptint: var(--wisp);
    display: flex;
    flex-direction: column;
    gap: 8px;
    opacity: 0.28;
    filter: grayscale(0.6);
    transition: opacity 0.5s, filter 0.5s;
}
.lane[data-slot="1"] { --ptint: #ffd7a8; align-items: flex-end; }
.lane.live { opacity: 1; filter: none; }

.lane-hud {
    padding: 10px 14px 8px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    color: var(--ink-dim);
    background: rgba(5, 6, 10, 0.55);
    border: 1px solid var(--line);
    border-left: 2px solid var(--ptint);
    backdrop-filter: blur(4px);
    min-width: 190px;
}
.lane[data-slot="1"] .lane-hud { border-left: 1px solid var(--line); border-right: 2px solid var(--ptint); text-align: right; }
.lane-title {
    font-family: var(--serif);
    font-size: 15px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--ptint);
    text-shadow: 0 0 10px color-mix(in srgb, var(--ptint) 60%, transparent);
    margin-bottom: 6px;
}
.lane-hud > div:not(.lane-title) {
    display: grid;
    grid-template-columns: 64px 1fr;
    gap: 10px;
    line-height: 1.6;
}
.lane[data-slot="1"] .lane-hud > div:not(.lane-title) { grid-template-columns: 1fr 64px; }
.lane[data-slot="1"] .lane-hud .k { order: 2; }
.lane-hud .k { color: var(--ink-faint); text-transform: uppercase; font-size: 10px; letter-spacing: 0.18em; }
.lane-hud span:not(.k) { color: var(--ink); }
.lane-hud .drift { color: var(--drift); }
.lane-hud .haunt { color: var(--haunt); }
.lane-hud .knock { color: var(--knock); }
.lane-hud .wail  { color: var(--wail); }

.cards { display: flex; gap: 8px; }

.voice-card {
    --tint: var(--ink-faint);
    position: relative;
    width: clamp(92px, 11vw, 130px);
    padding: 9px 10px 8px;
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
    column-gap: 8px;
    align-items: baseline;
    border: 1px solid var(--line);
    background: rgba(5, 6, 10, 0.55);
    backdrop-filter: blur(4px);
    color: var(--ink-faint);
    transition: color 0.35s, box-shadow 0.35s, background 0.35s, transform 0.35s;
}
.voice-card[data-voice="drift"] { --tint: var(--drift); }
.voice-card[data-voice="haunt"] { --tint: var(--haunt); }
.voice-card[data-voice="knock"] { --tint: var(--knock); }
.voice-card[data-voice="wail"]  { --tint: var(--wail); }
.voice-card .n { grid-row: 1 / span 2; font-family: var(--mono); font-size: 18px; line-height: 1; opacity: 0.6; }
.voice-card .voice { font-size: clamp(13px, 1.4vw, 17px); letter-spacing: 0.14em; text-transform: uppercase; }
.voice-card .reg { font-family: var(--mono); font-size: 9px; letter-spacing: 0.14em; text-transform: uppercase; opacity: 0.7; }

.voice-card.active {
    color: var(--tint);
    transform: translateY(-4px);
    background: color-mix(in srgb, var(--tint) 8%, rgba(5, 6, 10, 0.6));
    box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--tint) 55%, transparent),
    0 0 30px color-mix(in srgb, var(--tint) 25%, transparent);
    text-shadow: 0 0 12px color-mix(in srgb, var(--tint) 70%, transparent);
}
.voice-card.active .n { opacity: 1; }
.voice-card.pulse { animation: cardPulse 0.3s ease-out; }
@keyframes cardPulse {
    0%   { background: color-mix(in srgb, var(--tint) 35%, transparent); }
    100% { background: color-mix(in srgb, var(--tint) 8%, rgba(5, 6, 10, 0.6)); }
}

/* ------------------------------------------------------------
   Vanish flash
   ------------------------------------------------------------ */
#vanish {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: var(--bg);
    opacity: 0;
}
#vanish.flash { animation: vanish 0.55s ease-out; }
@keyframes vanish {
    0%   { opacity: 0.95; }
    100% { opacity: 0; }
}

/* ------------------------------------------------------------
   HUD
   ------------------------------------------------------------ */
#hud {
    position: absolute;
    top: 18px;
    left: 18px;
    padding: 12px 16px 10px;
    font-family: var(--mono);
    font-size: 11.5px;
    letter-spacing: 0.06em;
    color: var(--ink-dim);
    background: rgba(5, 6, 10, 0.55);
    border: 1px solid var(--line);
    backdrop-filter: blur(4px);
    pointer-events: none;
}
.hud-title {
    font-family: var(--serif);
    font-size: 18px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--wisp);
    text-shadow: 0 0 12px var(--wisp-glow);
    margin-bottom: 8px;
}
#hud > div:not(.hud-title) {
    display: grid;
    grid-template-columns: 72px 1fr;
    gap: 10px;
    line-height: 1.7;
}
#hud .k { color: var(--ink-faint); text-transform: uppercase; font-size: 10px; letter-spacing: 0.18em; }
#hud span:not(.k) { color: var(--ink); }

/* ------------------------------------------------------------
   Hints
   ------------------------------------------------------------ */
#hints {
    position: absolute;
    bottom: 14px;
    right: 18px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    color: var(--ink-faint);
    pointer-events: none;
}
kbd {
    font-family: var(--mono);
    font-size: 10px;
    padding: 2px 6px;
    border: 1px solid var(--ink-faint);
    color: var(--ink-dim);
    border-radius: 3px;
}

/* ------------------------------------------------------------
   Small screens
   ------------------------------------------------------------ */
@media (max-width: 640px) {
    .start-card { padding: 28px 20px 20px; }
    .rite-row { font-size: 14px; }
    #hud { font-size: 10.5px; padding: 10px 12px 8px; }
    #hints { display: none; }
    #voices { bottom: 16px; left: 8px; right: 8px; }
    .lane-hud { display: none; }
    .voice-card { width: 20vw; padding: 6px; }
    .voice-card .reg { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    .fog, .start-card h1 { animation: none; }
}
/* Gaze calibration sits above the stage and webcam overlays. */
#gaze-calibration {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(5, 6, 10, 0.88);
}
#gaze-calibration[hidden], #recalibrate-gaze[hidden] { display: none; }
#gaze-calibration-status {
    position: absolute;
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
    width: min(90vw, 560px);
    text-align: center;
    font: 14px/1.5 var(--mono);
    color: var(--wisp);
    pointer-events: none;
}
.gaze-target {
    position: absolute;
    width: 40px;
    height: 40px;
    transform: translate(-50%, -50%);
    border: 2px solid white;
    border-radius: 50%;
    background: #8fd3ff;
    color: #05060a;
    cursor: pointer;
    z-index: 1;
}
.gaze-target.complete { background: #9effc9; opacity: 0.5; }
#recalibrate-gaze {
    position: fixed;
    top: 18px;
    right: 18px;
    z-index: 20;
    padding: 10px 14px;
    border: 1px solid var(--wisp);
    background: var(--bg-2);
    color: var(--wisp);
    font: 12px var(--mono);
    cursor: pointer;
}
#webgazerVideoContainer, #webgazerGazeDot { pointer-events: none; }

#gaze-pointer {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 110;
    pointer-events: none;
}

.launch-instruction { color: var(--wisp); font-size: 22px; margin: 8px 0 14px; }
#launch-progress { width: min(260px, 100%); height: 8px; accent-color: var(--wisp); }
#retry-camera { margin-top: 12px; padding: 8px 12px; cursor: pointer; }
#audio-unlock {
    position: fixed; bottom: 12px; left: 50%; transform: translateX(-50%);
    z-index: 120; max-width: 90vw; padding: 10px 16px;
    border: 1px solid var(--line); border-radius: 6px;
    background: var(--bg-2); color: var(--wisp); font: 12px/1.5 var(--mono);
    cursor: pointer;
}
#audio-unlock[hidden], #retry-camera[hidden] { display: none; }