/* ========================================
   hangul.dev - Blobitecture Hangul Pavilions
   ======================================== */

:root {
    --kiln-clay: #C1653A;
    --fired-earth: #3E271C;
    --bisque-slip: #F2DCC8;
    --oxidized-copper: #5B8C6B;
    --charcoalite: #2B1D14;
    --warm-porcelain: #FAF0E6;
    --persimmon-glaze: #D4764E;
    --clay-shadow: #8B5E3C;
    --radius-module: clamp(16px, 3vw, 40px);
    --elevation-0: none;
    --elevation-1: 0 8px 32px rgba(62, 39, 28, 0.12);
    --elevation-2: 0 12px 48px rgba(62, 39, 28, 0.18);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    background-color: var(--fired-earth);
    color: var(--charcoalite);
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 400;
    line-height: 1.72;
    overflow-x: hidden;
    position: relative;
}

/* --- Topographic Contours --- */
.topo-contours {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 300vh;
    pointer-events: none;
    z-index: 0;
    opacity: 0.06;
    animation: topoDrift 60s linear infinite;
}

@keyframes topoDrift {
    from { transform: translateY(0); }
    to { transform: translateY(-20px); }
}

.contour {
    will-change: transform;
}

/* --- Typography --- */
h1 {
    font-family: 'Zilla Slab', serif;
    font-weight: 700;
    font-size: clamp(2.8rem, 6vw, 5rem);
    letter-spacing: 0.02em;
    line-height: 1.15;
    color: var(--warm-porcelain);
}

h2 {
    font-family: 'Zilla Slab', serif;
    font-weight: 600;
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    letter-spacing: 0.02em;
    line-height: 1.15;
    color: var(--charcoalite);
    margin-bottom: 1rem;
}

p {
    font-size: clamp(1rem, 1.4vw, 1.125rem);
    line-height: 1.72;
    letter-spacing: 0.01em;
    margin-bottom: 1.5rem;
    max-width: 68ch;
}

code {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.9em;
    background: rgba(62, 39, 28, 0.08);
    padding: 2px 6px;
    border-radius: 6px;
}

strong {
    font-weight: 600;
}

/* --- Zones --- */
.zone {
    position: relative;
    z-index: 1;
}

/* --- Zone 1: Threshold --- */
.zone-threshold {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.threshold-module {
    background: var(--fired-earth);
    border-radius: clamp(24px, 4vw, 60px);
    padding: clamp(3rem, 6vw, 6rem);
    text-align: center;
    width: 60vw;
    max-width: 700px;
    min-width: 280px;
    box-shadow: var(--elevation-1);
}

.site-title {
    margin-bottom: 0.5rem;
}

.title-hangul {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.kr-char {
    font-size: clamp(3rem, 8vw, 6rem);
    color: var(--persimmon-glaze);
    font-weight: 300;
    line-height: 1;
}

.site-subtitle {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 400;
    font-size: clamp(0.9rem, 1.5vw, 1.1rem);
    color: var(--clay-shadow);
    letter-spacing: 0.04em;
    opacity: 0;
    animation: fadeUp 0.8s ease 0.5s forwards;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Zone 2: Block District --- */
.zone-district {
    padding: 4rem 2rem 6rem;
}

.district-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: clamp(16px, 2.5vw, 32px);
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
}

/* --- Modules --- */
.module {
    background: var(--bisque-slip);
    border-radius: var(--radius-module);
    padding: clamp(1.5rem, 3vw, 2.5rem);
    position: relative;
    overflow: hidden;
    transition: box-shadow 0.4s ease;
}

.module.elevation-1 {
    box-shadow: var(--elevation-1);
}

.module:hover {
    box-shadow: var(--elevation-2);
}

.module-wide {
    grid-column: span 12;
}

.module-medium {
    grid-column: span 7;
}

.module-narrow {
    grid-column: span 5;
}

.module-full {
    grid-column: span 12;
}

/* Module entrance animation */
.module {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease, box-shadow 0.4s ease;
}

.module.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Module Border (decorative path-draw) --- */
.module-border {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 1px solid rgba(139, 94, 60, 0.15);
    border-radius: var(--radius-module);
    pointer-events: none;
    z-index: 2;
}

.module-title {
    margin-bottom: 1rem;
}

/* --- Jamo Diagrams --- */
.jamo-row {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-top: 1.5rem;
}

.jamo-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.jamo-diagram svg {
    width: 80px;
    height: 80px;
}

.draw-path {
    stroke-dasharray: 300;
    stroke-dashoffset: 300;
    transition: stroke-dashoffset 1.8s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-draw].visible .draw-path {
    stroke-dashoffset: 0;
}

.jamo-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    color: var(--clay-shadow);
    letter-spacing: 0.04em;
}

/* --- Vowel Grid --- */
.vowel-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
}

.vowel-item {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 1.1rem;
    padding: 0.5rem 1rem;
    background: rgba(193, 101, 58, 0.08);
    border-radius: 8px;
    color: var(--charcoalite);
    letter-spacing: 0.02em;
}

/* --- Block Example --- */
.block-example {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.block-parts {
    display: flex;
    gap: 0.5rem;
}

.block-part {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    border: 1px solid var(--clay-shadow);
    border-radius: 8px;
    color: var(--charcoalite);
}

.part-cho { background: rgba(193, 101, 58, 0.15); }
.part-jung { background: rgba(91, 140, 107, 0.15); }
.part-jong { background: rgba(139, 94, 60, 0.15); }

.block-arrow {
    font-size: 1.5rem;
    color: var(--clay-shadow);
}

.block-result {
    font-size: 3rem;
    font-weight: 700;
    color: var(--kiln-clay);
}

/* --- Position List --- */
.position-list {
    list-style: none;
    margin-top: 1rem;
}

.position-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(139, 94, 60, 0.1);
    font-size: clamp(0.9rem, 1.3vw, 1.05rem);
}

.position-list li:last-child {
    border-bottom: none;
}

/* --- Pull Quote --- */
.pull-quote {
    font-family: 'Zilla Slab', serif;
    font-weight: 700;
    font-size: clamp(1.2rem, 2vw, 1.6rem);
    line-height: 1.4;
    color: var(--charcoalite);
    border-left: 3px solid var(--oxidized-copper);
    padding-left: 1.5rem;
    margin: 1.5rem 0 1rem;
    font-style: italic;
}

.quote-attr {
    font-size: 0.85rem;
    color: var(--clay-shadow);
}

/* --- Blob Connector --- */
.blob-connector {
    grid-column: span 12;
    width: 200px;
    height: 60px;
    margin: 0 auto;
    pointer-events: none;
}

/* --- Zone 3: Deep Foundation --- */
.zone-deep {
    padding: 2rem 2rem 6rem;
}

.module-deep {
    max-width: 1400px;
    margin: 0 auto;
    border-radius: 48px;
    background: var(--warm-porcelain);
}

.deep-layout {
    display: grid;
    grid-template-columns: 7fr 5fr;
    gap: clamp(2rem, 4vw, 4rem);
}

.deep-text h2 {
    margin-bottom: 1.5rem;
}

.deep-text p {
    color: var(--charcoalite);
}

.deep-annotation {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    align-items: center;
    justify-content: center;
}

.anno-block {
    text-align: center;
}

.anno-block svg {
    width: 120px;
    height: 120px;
}

.anno-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.85rem;
    color: var(--clay-shadow);
    display: block;
    margin-top: 0.5rem;
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .module {
        opacity: 1;
        transform: none;
    }

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

    .site-subtitle {
        opacity: 1;
    }

    .topo-contours {
        animation: none;
    }
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .module-medium { grid-column: span 12; }
    .module-narrow { grid-column: span 12; }
}

@media (max-width: 768px) {
    .threshold-module {
        width: 90vw;
    }

    .deep-layout {
        grid-template-columns: 1fr;
    }

    .district-grid {
        gap: 1rem;
    }

    .jamo-row {
        gap: 1rem;
    }

    .module {
        padding: clamp(1.2rem, 3vw, 2rem);
    }

    .module-deep {
        border-radius: 24px;
    }
}