:root {
    --mountain-umber: #3E2723;
    --hearth-black: #2C1B0E;
    --hanji-cream: #F5EDE0;
    --terracotta-path: #C1714F;
    --autumn-ginkgo: #D4A843;
    --clay-ridge: #8D6E63;
    --village-terracotta: #D7A87E;
    --jirisan-pine: #4A6741;
    --ondol-white: #FAF6F0;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    background: var(--mountain-umber);
    color: var(--mountain-umber);
    font-family: 'Source Serif 4', serif;
    font-weight: 400;
    font-size: clamp(1rem, 1.2vw, 1.15rem);
    line-height: 1.75;
    letter-spacing: 0.01em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Trail SVG */
.trail-svg {
    position: fixed;
    left: 8%;
    top: 0;
    width: 60px;
    height: 100vh;
    z-index: 10;
    pointer-events: none;
}

/* Typography */
.summit-korean {
    font-family: 'Nanum Myeongjo', serif;
    font-weight: 400;
    font-size: clamp(4rem, 10vw, 8rem);
    color: var(--ondol-white);
    text-shadow: 0 0 40px rgba(212, 168, 67, 0.3);
    text-align: center;
}

.summit-domain {
    font-family: 'Playfair Display', serif;
    font-weight: 400;
    font-size: clamp(1.4rem, 3vw, 2.2rem);
    color: var(--ondol-white);
    letter-spacing: 0.12em;
    text-align: center;
    margin-top: 0.5rem;
}

.summit-tagline {
    font-family: 'Source Serif 4', serif;
    font-weight: 300;
    color: var(--ondol-white);
    opacity: 0;
    text-align: center;
    margin-top: 1.5rem;
    transition: opacity 2s ease;
}

.summit-tagline.visible {
    opacity: 0.7;
}

.card-heading {
    font-family: 'Playfair Display', serif;
    font-weight: 600;
    font-size: clamp(1.4rem, 3.5vw, 2.8rem);
    color: var(--mountain-umber);
    letter-spacing: 0.03em;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.card-body {
    font-family: 'Source Serif 4', serif;
    font-weight: 400;
    margin-bottom: 1.5rem;
    max-width: 50ch;
}

.korean-inline {
    font-family: 'Nanum Myeongjo', serif;
    color: var(--autumn-ginkgo);
    cursor: help;
    position: relative;
}

.korean-note {
    font-family: 'Nanum Myeongjo', serif;
    font-size: 0.9em;
    color: var(--autumn-ginkgo);
}

/* Zones */
.zone {
    position: relative;
    padding: clamp(4rem, 10vh, 8rem) clamp(2rem, 6vw, 6rem);
}

.zone-summit {
    min-height: 100vh;
    background: var(--mountain-umber);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.summit-content {
    position: relative;
    z-index: 5;
}

/* Mountain Layers */
.mountain-layers {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60%;
}

.mountain-layers svg {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.mountain-far { transform: translateY(calc(var(--scroll, 0) * 0.3px)); }
.mountain-mid { transform: translateY(calc(var(--scroll, 0) * 0.15px)); }

/* Ridge Zone */
.zone-ridge {
    min-height: 150vh;
    background: linear-gradient(to bottom, var(--mountain-umber), var(--clay-ridge));
    padding-left: 15%;
}

.zone-ridge .card-body,
.zone-ridge .card-heading {
    color: var(--ondol-white);
}

/* Valley Zone */
.zone-valley {
    min-height: 200vh;
    background:
        radial-gradient(circle at 30% 50%, rgba(245,237,224,0.03) 0%, transparent 50%),
        var(--hanji-cream);
    padding-left: 15%;
    position: relative;
}

/* Village Zone */
.zone-village {
    min-height: 150vh;
    background: var(--village-terracotta);
    padding-left: 15%;
}

/* Hearth Zone */
.zone-hearth {
    min-height: 80vh;
    background: linear-gradient(to bottom, var(--hearth-black), #1a0f06);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hearth-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.hearth-text {
    font-family: 'Playfair Display', serif;
    font-weight: 400;
    font-size: clamp(1.2rem, 2.5vw, 2rem);
    color: var(--ondol-white);
    max-width: 40ch;
    margin: 2rem auto;
}

.hearth-fire {
    width: 80px;
    margin: 0 auto;
}

.flame {
    animation: flicker 3s ease-in-out infinite;
}

@keyframes flicker {
    0%, 100% { opacity: 0.9; transform: scaleY(1); }
    33% { opacity: 1; transform: scaleY(1.05) translateX(1px); }
    66% { opacity: 0.85; transform: scaleY(0.95) translateX(-1px); }
}

.mountain-reflection {
    margin-top: 3rem;
    opacity: 0.3;
    transform: scaleY(-1);
}

.mountain-reflection svg {
    width: 100%;
    max-width: 600px;
}

.hearth-saram {
    font-family: 'Nanum Myeongjo', serif;
    font-size: 1.5rem;
    color: var(--autumn-ginkgo);
    margin-top: 2rem;
    opacity: 0;
    transition: opacity 5s ease;
}

.hearth-saram.visible {
    opacity: 0.4;
}

/* Trail Cards */
.trail-card {
    background: var(--hanji-cream);
    padding: clamp(2rem, 5vw, 4rem);
    border-top: 2px solid var(--terracotta-path);
    margin-bottom: 4rem;
    max-width: 550px;
    position: relative;
}

.card-right { margin-left: auto; }
.card-left { margin-right: auto; }

.card-large {
    max-width: 650px;
    padding: clamp(2.5rem, 6vw, 5rem);
}

.card-forest {
    background: var(--jirisan-pine);
    max-width: 100%;
    border-top-color: var(--autumn-ginkgo);
}

.forest-heading {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-size: clamp(1.6rem, 3vw, 2.5rem);
    color: var(--ondol-white);
}

.forest-body {
    color: var(--ondol-white);
    opacity: 0.9;
}

/* Card Reveal */
.card-reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 600ms cubic-bezier(0.25, 0.1, 0.25, 1),
                transform 600ms cubic-bezier(0.25, 0.1, 0.25, 1);
}

.card-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Card Branch */
.card-branch {
    position: absolute;
    left: -40px;
    top: 50%;
    width: 40px;
    height: 2px;
    background: var(--terracotta-path);
}

.branch-left {
    left: auto;
    right: -40px;
}

/* Organic Blobs */
.organic-blob {
    position: absolute;
    border-radius: 40% 60% 50% 50% / 50% 40% 60% 50%;
    pointer-events: none;
}

.blob-1 {
    width: 400px;
    height: 350px;
    background: radial-gradient(ellipse, rgba(212,168,67,0.1) 0%, transparent 70%);
    top: 10%;
    right: 5%;
}

.blob-2 {
    width: 300px;
    height: 280px;
    background: radial-gradient(ellipse, rgba(193,113,79,0.08) 0%, transparent 70%);
    bottom: 20%;
    left: 10%;
}

/* Margin Notes */
.margin-note {
    font-family: 'Source Serif 4', serif;
    font-weight: 300;
    font-style: italic;
    font-size: 0.85rem;
    color: var(--clay-ridge);
    max-width: 200px;
    margin-bottom: 2rem;
}

.note-right { margin-left: auto; text-align: right; }
.note-left { margin-right: auto; }

/* Pojagi Strip */
.pojagi-strip {
    height: 50px;
    background:
        repeating-linear-gradient(90deg,
            var(--terracotta-path) 0px, var(--terracotta-path) 8px,
            var(--hanji-cream) 8px, var(--hanji-cream) 9px,
            var(--autumn-ginkgo) 9px, var(--autumn-ginkgo) 17px,
            var(--hanji-cream) 17px, var(--hanji-cream) 18px,
            var(--jirisan-pine) 18px, var(--jirisan-pine) 26px,
            var(--hanji-cream) 26px, var(--hanji-cream) 27px,
            var(--clay-ridge) 27px, var(--clay-ridge) 35px,
            var(--hanji-cream) 35px, var(--hanji-cream) 36px
        );
    opacity: 0.4;
}

/* Botanical SVGs */
.botanical {
    width: 60px;
    margin-top: 1.5rem;
}

.botanical-sm {
    width: 40px;
}

.draw-path {
    stroke-dasharray: 200;
    stroke-dashoffset: 200;
    transition: stroke-dashoffset 1.5s ease;
}

.draw-path.drawn {
    stroke-dashoffset: 0;
}

/* Tooltip */
[data-tooltip] {
    position: relative;
}

[data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: -2.5rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--mountain-umber);
    color: var(--ondol-white);
    font-family: 'Source Serif 4', serif;
    font-size: 0.8rem;
    font-style: normal;
    padding: 4px 10px;
    white-space: nowrap;
    border-radius: 2px;
    opacity: 0;
    animation: tooltip-in 200ms ease forwards;
    z-index: 20;
}

@keyframes tooltip-in {
    to { opacity: 1; }
}

/* Responsive */
@media (max-width: 768px) {
    .trail-svg { display: none; }
    .zone-ridge, .zone-valley, .zone-village {
        padding-left: clamp(1.5rem, 4vw, 3rem);
    }
    .card-branch, .branch-left { display: none; }
    .margin-note { max-width: 100%; margin: 1rem 0; }
    .organic-blob { display: none; }
}

@media (prefers-reduced-motion: reduce) {
    .flame { animation: none; }
    .card-reveal { opacity: 1; transform: none; transition: none; }
    .summit-tagline { opacity: 0.7; transition: none; }
    .hearth-saram { opacity: 0.4; transition: none; }
    .draw-path { stroke-dashoffset: 0; transition: none; }
}