:root {
    --void: #0A0C12;
    --deep: #10141C;
    --mid: #182028;
    --quarter: #1E2838;
    --full: #2A3448;
    --steel: #4A5A6A;
    --silver-dim: #8898A8;
    --silver: #A8B8C8;
    --silver-bright: #B0C0D4;
    --silver-max: #B8C8D8;
    --moon-fill: #D4E0F0;
}

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

body {
    background: var(--void);
    color: var(--silver);
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    line-height: 1.7;
    overflow-x: hidden;
    transition: background-color 0.4s ease;
}

/* Phase progress bar */
.phase-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    z-index: 100;
    background: var(--deep);
}

.phase-bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(
        90deg,
        var(--void) 0%,
        var(--steel) 25%,
        var(--silver-max) 50%,
        var(--steel) 75%,
        var(--void) 100%
    );
    transition: width 0.1s linear;
}

/* Observatory container */
.observatory {
    width: 100%;
}

/* Phase sections */
.phase {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.phase-content {
    text-align: center;
    max-width: 560px;
    padding: 0 24px;
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.phase.in-view .phase-content {
    opacity: 1;
    transform: translateY(0);
}

/* Moon circle */
.moon-circle {
    width: 200px;
    height: 200px;
    margin: 0 auto 40px;
    position: relative;
}

.moon-svg {
    width: 100%;
    height: 100%;
}

/* Full moon glow */
.moon-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: radial-gradient(
        circle,
        rgba(212, 224, 240, 0.08) 0%,
        rgba(212, 224, 240, 0.03) 40%,
        transparent 70%
    );
    pointer-events: none;
}

/* Phase name */
.phase-name {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 300;
    font-size: clamp(1.2rem, 2.5vw, 2rem);
    letter-spacing: 0.08em;
    color: var(--silver-bright);
    text-transform: lowercase;
    margin-bottom: 6px;
}

/* Phase stage */
.phase-stage {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--steel);
    text-transform: uppercase;
    margin-bottom: 28px;
}

/* Phase description */
.phase-desc {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: 15px;
    line-height: 1.75;
    color: var(--silver-dim);
    margin-bottom: 32px;
}

/* Phase data */
.phase-data {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.data-label {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: 11px;
    letter-spacing: 0.04em;
    color: var(--steel);
    text-transform: uppercase;
}

.data-value {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 500;
    font-size: 13px;
    letter-spacing: 0.02em;
    color: var(--silver-bright);
}

/* Colophon */
.colophon {
    margin-top: 60px;
    padding-top: 24px;
    border-top: 1px solid var(--steel);
}

.colophon-domain {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 300;
    font-size: 18px;
    letter-spacing: 0.08em;
    color: var(--silver-dim);
}

/* Mobile */
@media (max-width: 600px) {
    .moon-circle {
        width: 140px;
        height: 140px;
        margin-bottom: 28px;
    }

    .phase-desc {
        font-size: 14px;
    }
}