@charset "utf-8";
:root {
    --bg: #02030b;
    --text: #f4f7ff;
    --dim: #8b93a8;
    --accent: #9ddcff;
    --warn: #ffb454;
    --good: #7dffc8;
    --bad: #ff6a4d;
    --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}

html,
body {
    margin: 0;
    height: 2100vh;
    overflow-x: hidden;
    font-family: var(--mono);
    background: var(--bg);
    color: var(--text);
}

::selection { background: rgba(157, 220, 255, 0.25); }

#scene-container {
    position: fixed;
    inset: 0;
    overflow: hidden;
}

#scene-container canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

#intro-text {
    position: absolute;
    left: 50%;
    bottom: 7vh;
    transform: translateX(-50%);
    color: var(--dim);
    font-size: 0.8rem;
    font-weight: 400;
    letter-spacing: 0.35em;
    text-shadow: 0 0 20px rgba(0, 0, 0, 0.65);
    z-index: 10;
    animation: introPulse 2.6s ease-in-out infinite;
    white-space: nowrap;
}

@keyframes introPulse {
    0%, 100% { opacity: 0.45; }
    50% { opacity: 1; }
}

/* -------------------------
   Loading screen
   ------------------------- */

#loading-screen {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: var(--bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 18px;
    transition: opacity 0.8s ease;
}

#loading-screen.hidden { opacity: 0; pointer-events: none; }

.loader-title {
    font-size: 0.85rem;
    letter-spacing: 0.6em;
    color: var(--text);
    padding-left: 0.6em;
}

.loader-line {
    font-size: 0.7rem;
    letter-spacing: 0.25em;
    color: var(--dim);
}

.blink { animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

#loading-progress {
    font-size: 0.7rem;
    color: var(--accent);
    letter-spacing: 0.2em;
}

/* -------------------------
   WebGL fallback
   ------------------------- */

#webgl-fallback {
    position: fixed;
    inset: 0;
    z-index: 99;
    background: var(--bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 8vw;
    gap: 14px;
}

#webgl-fallback[hidden] { display: none; }

#webgl-fallback p {
    max-width: 44ch;
    color: var(--dim);
    font-size: 0.8rem;
    line-height: 1.8;
    margin: 0;
}

/* -------------------------
   Narrative overlay
   ------------------------- */

#narrative-layer {
    position: fixed;
    inset: 0;
    z-index: 20;
    pointer-events: none;
}

.beat {
    position: absolute;
    left: 6vw;
    bottom: 14vh;
    max-width: min(38ch, 82vw);
    opacity: 0;
    visibility: hidden;
}

.beat-index {
    font-size: 0.65rem;
    letter-spacing: 0.4em;
    color: var(--accent);
    margin-bottom: 14px;
}

.beat-text {
    font-size: clamp(0.85rem, 1.3vw, 1.05rem);
    font-weight: 300;
    line-height: 2;
    color: var(--text);
    margin: 0;
    text-shadow: 0 2px 24px rgba(0, 0, 0, 0.85);
}

.beat-tag {
    display: inline-block;
    margin-top: 16px;
    padding: 5px 12px;
    font-size: 0.6rem;
    letter-spacing: 0.35em;
    color: var(--warn);
    border: 1px solid rgba(255, 180, 84, 0.4);
}

/* Ending */

.ending {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: min(58ch, 86vw);
    text-align: center;
    opacity: 0;
    visibility: hidden;
}

.ending-title {
    font-size: clamp(1rem, 2.2vw, 1.5rem);
    letter-spacing: 0.7em;
    padding-left: 0.7em;
    margin-bottom: 28px;
    color: var(--text);
}

.ending-line {
    font-size: clamp(0.85rem, 1.4vw, 1.05rem);
    font-weight: 300;
    line-height: 2.1;
    margin: 0 0 18px;
    color: var(--text);
    text-shadow: 0 2px 24px rgba(0, 0, 0, 0.85);
}

.ending-question {
    font-size: clamp(0.75rem, 1.1vw, 0.9rem);
    color: var(--dim);
    line-height: 2;
    margin: 0 0 34px;
    font-style: italic;
}

.ending-meta {
    font-size: 0.62rem;
    letter-spacing: 0.28em;
    color: var(--dim);
    border-top: 1px solid rgba(139, 147, 168, 0.25);
    padding-top: 18px;
    display: inline-block;
}

.habitable { color: var(--good); }
.hostile { color: var(--bad); }

/* -------------------------
   Vignette
   ------------------------- */

#vignette {
    position: fixed;
    inset: 0;
    z-index: 15;
    pointer-events: none;
    background: radial-gradient(ellipse at center, transparent 55%, rgba(0, 0, 5, 0.55) 100%);
}

/* -------------------------
   HUD (seed + audio)
   ------------------------- */

#hud {
    position: fixed;
    top: 18px;
    right: 18px;
    z-index: 30;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 12px;
}

#seed-hud {
    background: rgba(4, 7, 18, 0.72);
    border: 1px solid rgba(139, 147, 168, 0.25);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

#seed-hud label {
    font-size: 0.58rem;
    letter-spacing: 0.35em;
    color: var(--dim);
}

.seed-row { display: flex; gap: 8px; }

#seed-input {
    width: 12ch;
    background: transparent;
    border: 1px solid rgba(139, 147, 168, 0.35);
    color: var(--accent);
    font-family: var(--mono);
    font-size: 0.78rem;
    letter-spacing: 0.2em;
    padding: 6px 8px;
    text-transform: uppercase;
    outline: none;
    transition: border-color 0.25s ease;
}

#seed-input:focus { border-color: var(--accent); }

#seed-apply {
    background: transparent;
    border: 1px solid rgba(157, 220, 255, 0.45);
    color: var(--accent);
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.2em;
    padding: 6px 12px;
    cursor: pointer;
    transition: background-color 0.25s ease, color 0.25s ease;
}

#seed-apply:hover { background-color: rgba(157, 220, 255, 0.15); }

.seed-hint {
    font-size: 0.52rem;
    letter-spacing: 0.12em;
    color: rgba(139, 147, 168, 0.7);
}

#audio-toggle {
    background: rgba(4, 7, 18, 0.72);
    border: 1px solid rgba(139, 147, 168, 0.25);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    color: var(--dim);
    font-family: var(--mono);
    font-size: 0.62rem;
    letter-spacing: 0.28em;
    padding: 9px 14px;
    cursor: pointer;
    transition: color 0.25s ease, border-color 0.25s ease;
}

#audio-toggle:hover { color: var(--text); }
#audio-toggle[aria-pressed="true"] { color: var(--good); border-color: rgba(125, 255, 200, 0.4); }

/* -------------------------
   Mobile
   ------------------------- */

@media (max-width: 640px) {
    .beat { left: 7vw; bottom: 18vh; }
    #seed-hud { padding: 9px 10px; }
    .seed-hint { display: none; }
    #intro-text { font-size: 0.65rem; letter-spacing: 0.25em; }
}