/* ============================================================
   yesan.xyz · 예산
   Design: Korean celadon pottery + hanok woodcraft
   Layout: ma-negative-space stacked-sections (six chambers)
   ============================================================ */

:root {
    /* Palette · Celadon and Wood */
    --celadon-mist: #EDF2EE;
    --celadon-dark: #3A6B5A;
    --celadon-glaze: #7FB8A2;
    --hanji-cream: #F5F0E6;
    --charcoal-wood: #2A2520;
    --earth-brown: #4A4035;
    --wood-brown: #8B7D6B;
    --threshold-line: #B5A99A;
    --accent-clay: #C47A5A;

    /* Typography */
    --font-display: "Noto Serif KR", "Times New Roman", serif;
    --font-body: "Noto Sans KR", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-numeric: "DM Mono", "Courier New", monospace;
    --font-label: "IBM Plex Sans KR", "Noto Sans KR", sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-weight: 400;
    color: var(--earth-brown);
    background-color: var(--celadon-mist);
    line-height: 1.85;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* ---------- Chambers ---------- */

.chambers {
    display: block;
    width: 100%;
}

.chamber {
    position: relative;
    width: 100%;
    min-height: 100vh;
    padding: clamp(40px, 8vh, 80px) clamp(40px, 12vw, 120px);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.chamber--mist {
    background-color: var(--celadon-mist);
}

.chamber--cream {
    background-color: var(--hanji-cream);
}

/* Wooden grain texture on alternating chambers */
.chamber--grain {
    background-image: repeating-linear-gradient(
        to bottom,
        transparent 0,
        transparent 11.5px,
        rgba(139, 125, 107, 0.08) 11.5px,
        rgba(139, 125, 107, 0.08) 12px
    );
}

.chamber__inner {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 45% 45%;
    column-gap: 10%;
    width: 100%;
    max-width: 1200px;
    align-items: start;
}

/* Columns · jeong-gyeol separation */
.chamber__column {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.chamber__column--text {
    padding-top: 12px;
}

.chamber__column--numbers {
    gap: 36px;
}

/* ---------- Typography ---------- */

.chamber__label {
    font-family: var(--font-label);
    font-weight: 300;
    font-size: 12px;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--wood-brown);
    display: inline-block;
    margin-bottom: 8px;
}

.chamber__title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(34px, 5vw, 64px);
    line-height: 1.18;
    color: var(--charcoal-wood);
    letter-spacing: -0.01em;
}

.chamber__prose {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(15px, 1.1vw, 17px);
    line-height: 1.85;
    color: var(--earth-brown);
    max-width: 38ch;
}

.chamber__prose--secondary {
    color: var(--wood-brown);
    font-style: italic;
    font-size: clamp(14px, 1vw, 15px);
    border-left: 1px solid rgba(139, 125, 107, 0.3);
    padding-left: 18px;
}

.chamber__signature {
    font-family: var(--font-numeric);
    font-weight: 400;
    font-size: 13px;
    letter-spacing: 0.12em;
    color: var(--celadon-dark);
    margin-top: 12px;
}

/* ---------- Number Blocks ---------- */

.number-block {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.number-block__label {
    font-family: var(--font-label);
    font-weight: 300;
    font-size: 12px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--wood-brown);
}

.number-block__value {
    font-family: var(--font-numeric);
    font-weight: 500;
    font-size: clamp(26px, 2.5vw, 36px);
    line-height: 1.1;
    color: var(--celadon-dark);
    letter-spacing: -0.01em;
    font-variant-numeric: tabular-nums;
}

.number-block__value--xl {
    font-size: clamp(36px, 3.6vw, 52px);
    color: var(--charcoal-wood);
}

.number-block--featured {
    padding: 4px 0 4px 22px;
    border-left: 1px solid rgba(58, 107, 90, 0.28);
}

/* ---------- Threshold lines (hanok beams) ---------- */

.threshold {
    border: none;
    border-top: 1px solid rgba(139, 125, 107, 0.2);
    margin: 0 clamp(40px, 12vw, 120px);
    height: 40px;
    display: block;
    background: transparent;
}

/* ---------- Vessel SVG silhouettes ---------- */

.vessel {
    position: absolute;
    width: clamp(220px, 28vw, 380px);
    height: clamp(220px, 28vw, 380px);
    opacity: 0.15;
    pointer-events: none;
    z-index: 1;
}

.vessel--moon-jar {
    top: 8%;
    right: 4%;
}

.vessel--celadon-vase {
    top: 12%;
    left: 3%;
}

.vessel--bowl {
    bottom: 8%;
    right: 5%;
}

.vessel--buncheong {
    bottom: 10%;
    left: 4%;
}

.vessel--ritual {
    top: 10%;
    right: 6%;
}

.vessel--ash {
    bottom: 8%;
    left: 5%;
}

/* ---------- Inlay (sanggam) corner decorations ---------- */

.inlay-corner {
    position: absolute;
    width: 80px;
    height: 80px;
    opacity: 0.18;
    pointer-events: none;
    z-index: 1;
}

.inlay-corner svg {
    width: 100%;
    height: 100%;
}

.inlay-corner--tl {
    top: clamp(20px, 4vh, 40px);
    left: clamp(20px, 6vw, 60px);
}

.inlay-corner--tr {
    top: clamp(20px, 4vh, 40px);
    right: clamp(20px, 6vw, 60px);
}

.inlay-corner--bl {
    bottom: clamp(20px, 4vh, 40px);
    left: clamp(20px, 6vw, 60px);
}

.inlay-corner--br {
    bottom: clamp(20px, 4vh, 40px);
    right: clamp(20px, 6vw, 60px);
}

/* ---------- Indicator dot (sole UI element) ---------- */

.indicator-dot {
    position: fixed;
    bottom: 22px;
    left: 50%;
    transform: translateX(-50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--celadon-glaze);
    z-index: 100;
    animation: indicator-pulse 3s ease-in-out infinite;
    pointer-events: none;
}

@keyframes indicator-pulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.8; }
}

/* ---------- Number reveal (counter-animate only) ---------- */

.number-block__value {
    opacity: 0;
    transition: opacity 600ms ease-out;
}

.number-block__value.is-revealed {
    opacity: 1;
}

/* ---------- Responsive · mobile collapse ---------- */

@media (max-width: 768px) {
    .chamber {
        padding: 40px 24px;
        min-height: auto;
        padding-top: 80px;
        padding-bottom: 80px;
    }

    .chamber__inner {
        grid-template-columns: 1fr;
        row-gap: 56px;
    }

    .chamber__column {
        gap: 22px;
    }

    .chamber__column--numbers {
        gap: 28px;
    }

    .chamber__title {
        font-size: clamp(28px, 8vw, 40px);
    }

    .number-block__value {
        font-size: clamp(22px, 6vw, 30px);
    }

    .number-block__value--xl {
        font-size: clamp(30px, 9vw, 42px);
    }

    .threshold {
        margin: 0 24px;
        height: 24px;
    }

    .vessel {
        width: 60vw;
        height: 60vw;
        opacity: 0.10;
    }

    .inlay-corner {
        width: 50px;
        height: 50px;
    }

    .chamber__prose {
        max-width: none;
    }

    /* On mobile, ensure jeong-gyeol order is consistent: text first, numbers second */
    #chamber-2 .chamber__column--text { order: 1; }
    #chamber-2 .chamber__column--numbers { order: 2; }
    #chamber-4 .chamber__column--text { order: 1; }
    #chamber-4 .chamber__column--numbers { order: 2; }
    #chamber-6 .chamber__column--text { order: 1; }
    #chamber-6 .chamber__column--numbers { order: 2; }
}

@media (max-width: 480px) {
    .chamber {
        padding: 60px 20px;
    }

    .chamber__title {
        font-size: clamp(26px, 9vw, 34px);
    }
}