/* ============================================================
   namu.style — wabi-sabi forest design language
   ============================================================ */

:root {
    --forest-deep:  #1a2e1a;   /* Deep Forest        */
    --canopy:       #3d5c3a;   /* Canopy Deep        */
    --leaf:         #a4c49a;   /* Young Leaf         */
    --heartwood:    #5c4a3a;   /* Heartwood          */
    --bark:         #8b7355;   /* Bark Medium        */
    --sapwood:      #c4a882;   /* Sapwood            */
    --birch-light:  #e8dcc8;   /* Birch Light        */
    --paper-cream:  #f5f0e8;   /* Paper Cream        */

    --font-display: 'Cormorant Garamond', 'Lora', Georgia, serif;
    --font-body:    'Libre Baskerville', Georgia, serif;
    --font-label:   'Karla', 'Inter', system-ui, sans-serif;

    --trunk-opacity: 0.3;
    --reveal-distance: 60px;
    --branch-gap: clamp(7rem, 14vw, 12rem);
}

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

html {
    scroll-behavior: smooth;
    background: var(--birch-light);
}

body {
    background: var(--birch-light);
    color: var(--heartwood);
    font-family: var(--font-body);
    font-size: 1.05rem;
    line-height: 1.8;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* --------------------------------------------------------
   Bark texture overlay
   -------------------------------------------------------- */
.bark-texture {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.6;
    mix-blend-mode: multiply;
    background-image: url("data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='8' height='8'%3E%3Ccircle cx='1' cy='1' r='0.45' fill='%235c4a3a' fill-opacity='0.55'/%3E%3Ccircle cx='5' cy='2.5' r='0.35' fill='%235c4a3a' fill-opacity='0.4'/%3E%3Ccircle cx='3' cy='6' r='0.4' fill='%235c4a3a' fill-opacity='0.5'/%3E%3Ccircle cx='7' cy='5' r='0.3' fill='%235c4a3a' fill-opacity='0.35'/%3E%3C/svg%3E");
    background-repeat: repeat;
}

/* --------------------------------------------------------
   Drifting leaf particles
   -------------------------------------------------------- */
.leaf-field {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 12;
    overflow: hidden;
}

.leaf {
    position: absolute;
    top: -40px;
    width: 8px;
    height: 12px;
    border-radius: 60% 40% 60% 40% / 60% 60% 40% 40%;
    background: var(--leaf);
    opacity: 0;
    will-change: transform, opacity;
    box-shadow: inset -1px -2px 0 rgba(61,92,58,0.35);
}

@keyframes drift {
    0%   { transform: translate3d(0, -20px, 0) rotate(0deg);   opacity: 0; }
    10%  { opacity: 0.22; }
    50%  { transform: translate3d(var(--sway, 18px), 50vh, 0) rotate(135deg); }
    90%  { opacity: 0.15; }
    100% { transform: translate3d(calc(var(--sway, 18px) * -1), 100vh, 0) rotate(270deg); opacity: 0; }
}

/* --------------------------------------------------------
   Central trunk line
   -------------------------------------------------------- */
.trunk-line {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100vh;
    background: var(--heartwood);
    opacity: var(--trunk-opacity);
    z-index: 10;
    pointer-events: none;
}

.trunk-line::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom,
        transparent 0%,
        var(--heartwood) 8%,
        var(--heartwood) 92%,
        transparent 100%);
    opacity: 0.4;
}

/* --------------------------------------------------------
   Minimal navigation
   -------------------------------------------------------- */
.forest-nav {
    position: fixed;
    top: 1.6rem;
    left: 1.6rem;
    z-index: 200;
    font-family: var(--font-label);
}

.nav-toggle {
    width: 38px;
    height: 38px;
    border: 1px solid rgba(92,74,58,0.35);
    border-radius: 50%;
    background: rgba(245,240,232,0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    cursor: pointer;
    display: grid;
    place-items: center;
    transition: background 0.4s ease, border-color 0.4s ease, transform 0.4s ease;
}

.nav-toggle:hover {
    background: var(--paper-cream);
    border-color: var(--heartwood);
}

.nav-glyph {
    display: inline-flex;
    flex-direction: column;
    gap: 3px;
    align-items: stretch;
    width: 14px;
}

.nav-glyph span {
    display: block;
    height: 1px;
    background: var(--heartwood);
    transition: transform 0.45s ease, width 0.45s ease, opacity 0.4s ease;
}

.nav-glyph span:nth-child(1) { width: 14px; }
.nav-glyph span:nth-child(2) { width: 10px; align-self: flex-start; margin-left: 2px; }
.nav-glyph span:nth-child(3) { width: 6px;  align-self: flex-start; margin-left: 4px; }

.forest-nav.open .nav-glyph span:nth-child(1) { transform: translateY(4px) rotate(45deg);  width: 14px; margin-left: 0; }
.forest-nav.open .nav-glyph span:nth-child(2) { opacity: 0; }
.forest-nav.open .nav-glyph span:nth-child(3) { transform: translateY(-4px) rotate(-45deg); width: 14px; margin-left: 0; }

.nav-list {
    list-style: none;
    margin-top: 1.1rem;
    padding: 0.4rem 0;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: max-height 0.5s ease, opacity 0.5s ease;
    border-left: 1px solid rgba(92,74,58,0.2);
    padding-left: 1rem;
}

.forest-nav.open .nav-list {
    max-height: 40rem;
    opacity: 1;
}

.nav-list li {
    margin: 0.35rem 0;
    transform: translateX(-6px);
    opacity: 0;
    transition: transform 0.5s ease, opacity 0.5s ease;
}

.forest-nav.open .nav-list li {
    transform: translateX(0);
    opacity: 1;
}

.forest-nav.open .nav-list li:nth-child(1) { transition-delay: 0.04s; }
.forest-nav.open .nav-list li:nth-child(2) { transition-delay: 0.10s; }
.forest-nav.open .nav-list li:nth-child(3) { transition-delay: 0.16s; }
.forest-nav.open .nav-list li:nth-child(4) { transition-delay: 0.22s; }
.forest-nav.open .nav-list li:nth-child(5) { transition-delay: 0.28s; }
.forest-nav.open .nav-list li:nth-child(6) { transition-delay: 0.34s; }
.forest-nav.open .nav-list li:nth-child(7) { transition-delay: 0.40s; }

.nav-list a {
    color: var(--heartwood);
    text-decoration: none;
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    text-transform: lowercase;
    transition: color 0.3s ease, letter-spacing 0.4s ease;
    display: inline-block;
    padding: 0.1rem 0;
}

.nav-list a:hover {
    color: var(--canopy);
    letter-spacing: 0.18em;
}

/* --------------------------------------------------------
   Canopy hero
   -------------------------------------------------------- */
.canopy-hero {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background:
        radial-gradient(ellipse at 50% 40%, var(--birch-light) 0%, var(--canopy) 65%, var(--forest-deep) 100%);
    padding: 6rem 1.5rem 4rem;
    isolation: isolate;
}

.canopy-hero::before {
    /* Light filtering through leaves */
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 22% 30%, rgba(232,220,200,0.35) 0%, transparent 24%),
        radial-gradient(circle at 78% 25%, rgba(245,240,232,0.30) 0%, transparent 22%),
        radial-gradient(circle at 35% 75%, rgba(164,196,154,0.18) 0%, transparent 28%),
        radial-gradient(circle at 70% 70%, rgba(196,168,130,0.15) 0%, transparent 26%);
    mix-blend-mode: screen;
    z-index: 1;
    pointer-events: none;
}

.growth-rings {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: clamp(360px, 70vmin, 640px);
    height: clamp(360px, 70vmin, 640px);
    pointer-events: none;
    opacity: 0.18;
    z-index: 2;
    will-change: transform, opacity;
}

.growth-rings svg {
    width: 100%;
    height: 100%;
    display: block;
}

.dapple-light {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 3;
}

.dapple {
    position: absolute;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(245,240,232,0.55) 0%, transparent 70%);
    mix-blend-mode: screen;
    animation: dappleFloat 14s ease-in-out infinite;
}

.dapple.d1 { top: 18%; left: 20%; animation-delay: 0s;  }
.dapple.d2 { top: 30%; right: 22%; width: 80px; height: 80px; animation-delay: -3s; }
.dapple.d3 { top: 60%; left: 12%; width: 50px; height: 50px; animation-delay: -6s; }
.dapple.d4 { top: 70%; right: 18%; width: 70px; height: 70px; animation-delay: -9s; }
.dapple.d5 { top: 45%; left: 50%; width: 90px; height: 90px; transform: translateX(-50%); animation-delay: -12s; }

@keyframes dappleFloat {
    0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.7; }
    50%      { transform: translate(8px, -10px) scale(1.08); opacity: 1; }
}

.dapple.d5 {
    animation-name: dappleFloatCenter;
}

@keyframes dappleFloatCenter {
    0%, 100% { transform: translateX(-50%) scale(1); opacity: 0.6; }
    50%      { transform: translateX(-46%) scale(1.1); opacity: 0.9; }
}

.hero-mark {
    position: relative;
    z-index: 5;
    text-align: center;
    max-width: 720px;
}

.hero-eyebrow {
    display: block;
    font-family: var(--font-label);
    font-size: 0.75rem;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--heartwood);
    opacity: 0.7;
    margin-bottom: 2rem;
}

.hero-title {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(2.6rem, 7vw, 5.4rem);
    color: var(--forest-deep);
    letter-spacing: 0.14em;
    line-height: 1.05;
    margin: 0;
}

.hero-title .dot {
    color: var(--canopy);
    font-style: italic;
    font-weight: 400;
    margin: 0 0.04em;
}

.hero-han {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(3rem, 9vw, 7rem);
    color: var(--canopy);
    margin: 1.4rem 0 0.8rem;
    letter-spacing: 0.3em;
    opacity: 0.75;
    line-height: 1;
}

.hero-subtitle {
    font-family: var(--font-label);
    font-weight: 400;
    font-size: 0.82rem;
    letter-spacing: 0.22em;
    text-transform: lowercase;
    color: var(--heartwood);
    opacity: 0.78;
    margin-top: 1.2rem;
}

.scroll-hint {
    position: absolute;
    bottom: 2.4rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.7rem;
    z-index: 5;
    opacity: 0.6;
    transition: opacity 0.6s ease;
}

.scroll-hint span {
    font-family: var(--font-label);
    font-weight: 400;
    font-size: 0.68rem;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--heartwood);
}

.scroll-arrow {
    width: 1px;
    height: 36px;
    background: linear-gradient(to bottom, transparent, var(--heartwood));
    position: relative;
    animation: scrollPulse 2.4s ease-in-out infinite;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 5px;
    height: 5px;
    border-right: 1px solid var(--heartwood);
    border-bottom: 1px solid var(--heartwood);
    transform: translateX(-50%) rotate(45deg);
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: translateY(0); }
    50%      { opacity: 1;   transform: translateY(4px); }
}

/* --------------------------------------------------------
   Branches content
   -------------------------------------------------------- */
.branches-content {
    position: relative;
    max-width: 1280px;
    margin: 0 auto;
    padding: 8rem 2rem 6rem;
    z-index: 5;
}

.branch {
    position: relative;
    width: clamp(320px, 46%, 560px);
    padding: 2.6rem 2.4rem 2.8rem;
    margin-bottom: var(--branch-gap);
    background: var(--paper-cream);
    border-radius: 2px;
    box-shadow:
        0 1px 0 rgba(92,74,58,0.06),
        0 30px 60px -40px rgba(26,46,26,0.18);
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

.branch.branch-right {
    transform: translateX(40px);
}

.branch.visible {
    opacity: 1;
    transform: translateX(0);
}

.branch.visible h2,
.branch.visible p,
.branch.visible .branch-meta,
.branch.visible .ring-figure,
.branch.visible .type-specimens,
.branch.visible .palette-grid {
    animation: childRise 0.6s ease-out both;
}

.branch.visible h2          { animation-delay: 0.10s; }
.branch.visible > p:nth-of-type(1)  { animation-delay: 0.20s; }
.branch.visible > p:nth-of-type(2)  { animation-delay: 0.30s; }
.branch.visible .branch-meta,
.branch.visible .ring-figure,
.branch.visible .type-specimens,
.branch.visible .palette-grid       { animation-delay: 0.40s; }

@keyframes childRise {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Alternate sides relative to centre line, with organic offsets */
.branch-left {
    margin-right: auto;
    margin-left: clamp(1rem, 5%, 5rem);
    border-left: 3px solid var(--bark);
}

.branch-right {
    margin-left: auto;
    margin-right: clamp(1rem, 5%, 5rem);
    border-right: 3px solid var(--bark);
    text-align: right;
}

.branch[data-branch="1"] { width: clamp(320px, 44%, 520px); }
.branch[data-branch="2"] { width: clamp(320px, 50%, 600px); }
.branch[data-branch="3"] { width: clamp(320px, 42%, 500px); }
.branch[data-branch="4"] { width: clamp(320px, 48%, 580px); }
.branch[data-branch="5"] { width: clamp(320px, 52%, 620px); }
.branch[data-branch="6"] { width: clamp(320px, 50%, 600px); }

.branch-label {
    display: inline-block;
    font-family: var(--font-label);
    font-size: 0.7rem;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--bark);
    margin-bottom: 1.2rem;
    opacity: 0.85;
}

.branch h2 {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(1.6rem, 3.4vw, 2.4rem);
    color: var(--forest-deep);
    letter-spacing: 0.02em;
    line-height: 1.2;
    margin-bottom: 1.2rem;
}

.branch p {
    color: var(--heartwood);
    opacity: 0.9;
    margin-bottom: 1rem;
}

.branch-quiet {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 1.1rem;
    color: var(--canopy);
    opacity: 0.75 !important;
    margin-top: 1.6rem !important;
    line-height: 1.5;
}

.branch-meta {
    list-style: none;
    margin-top: 1.6rem;
    border-top: 1px solid rgba(92,74,58,0.18);
    padding-top: 1.2rem;
    display: grid;
    gap: 0.5rem;
}

.branch-meta li {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    font-family: var(--font-label);
    font-size: 0.78rem;
    letter-spacing: 0.08em;
}

.branch-right .branch-meta li {
    flex-direction: row-reverse;
}

.branch-meta span {
    color: var(--bark);
    text-transform: uppercase;
    letter-spacing: 0.22em;
    opacity: 0.7;
}

.branch-meta em {
    font-style: normal;
    color: var(--canopy);
    font-weight: 500;
}

/* Ring accent (small concentric mark on each branch) */
.ring-accent {
    position: absolute;
    top: 50%;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--bark);
    opacity: 0.55;
    transform: translateY(-50%);
}

.branch-left .ring-accent  { right: -18px; }
.branch-right .ring-accent { left:  -18px; }

.ring-accent::before {
    content: '';
    position: absolute;
    inset: 5px;
    border-radius: 50%;
    border: 1px solid var(--bark);
    opacity: 0.6;
}

.ring-accent::after {
    content: '';
    position: absolute;
    inset: 12px;
    border-radius: 50%;
    background: var(--bark);
    opacity: 0.45;
}

/* SVG branch connectors */
.branch-connector {
    position: absolute;
    top: 50%;
    width: 16%;
    max-width: 140px;
    min-width: 60px;
    height: auto;
    overflow: visible;
    transform: translateY(-50%);
    pointer-events: none;
}

.connector-right { right: -16%; }
.connector-left  { left:  -16%; }

/* Ring figure (decorative SVG-like rings) */
.ring-figure {
    position: relative;
    margin-top: 1.6rem;
    width: 140px;
    height: 140px;
}

.branch-left .ring-figure {
    margin-left: auto;
    margin-right: 0;
}

.ring-figure .ring {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 1px solid var(--bark);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    opacity: 0.5;
}

.ring-figure .r1 { width: 16px;  height: 16px;  background: var(--bark); opacity: 0.65; }
.ring-figure .r2 { width: 36px;  height: 36px;  border-color: var(--heartwood); opacity: 0.55; }
.ring-figure .r3 { width: 60px;  height: 62px;  border-color: var(--bark); opacity: 0.5; }
.ring-figure .r4 { width: 86px;  height: 84px;  border-color: var(--heartwood); opacity: 0.4; }
.ring-figure .r5 { width: 112px; height: 116px; border-color: var(--bark); opacity: 0.32; }
.ring-figure .r6 { width: 140px; height: 138px; border-color: var(--heartwood); opacity: 0.22; }

/* Type specimens */
.type-specimens {
    margin-top: 1.6rem;
    display: grid;
    gap: 1.2rem;
    border-top: 1px solid rgba(92,74,58,0.18);
    padding-top: 1.4rem;
}

.specimen .spec-name {
    display: block;
    font-family: var(--font-label);
    font-size: 0.7rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--bark);
    opacity: 0.75;
    margin-bottom: 0.4rem;
}

.specimen .spec-sample {
    margin: 0;
    color: var(--forest-deep);
    opacity: 0.95;
}

.specimen-display .spec-sample {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: 1.6rem;
    line-height: 1.1;
    letter-spacing: 0.04em;
}

.specimen-body .spec-sample {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
}

.specimen-label .spec-sample {
    font-family: var(--font-label);
    font-size: 0.85rem;
    letter-spacing: 0.16em;
    text-transform: lowercase;
    color: var(--canopy);
}

/* Palette grid */
.palette-grid {
    margin-top: 1.6rem;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.9rem 1.2rem;
    border-top: 1px solid rgba(92,74,58,0.18);
    padding-top: 1.4rem;
}

.swatch {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    font-family: var(--font-label);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    color: var(--heartwood);
}

.branch-right .swatch {
    flex-direction: row-reverse;
    text-align: right;
}

.swatch .chip {
    flex: 0 0 auto;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--c);
    border: 1px solid rgba(92,74,58,0.25);
    box-shadow: inset 0 0 0 2px rgba(245,240,232,0.6);
}

.swatch em {
    font-style: normal;
    text-transform: lowercase;
    letter-spacing: 0.16em;
    color: var(--canopy);
    flex: 1 1 auto;
}

.swatch i {
    font-style: normal;
    color: var(--bark);
    opacity: 0.7;
    font-size: 0.66rem;
    letter-spacing: 0.05em;
}

/* --------------------------------------------------------
   Roots footer
   -------------------------------------------------------- */
.roots-footer {
    position: relative;
    padding: 8rem 2rem 4rem;
    background: linear-gradient(to bottom,
        var(--birch-light) 0%,
        var(--canopy) 60%,
        var(--forest-deep) 100%);
    text-align: center;
    overflow: hidden;
    color: var(--paper-cream);
}

.root-system {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: min(90%, 800px);
    height: 320px;
    pointer-events: none;
}

.root-svg {
    width: 100%;
    height: 100%;
    display: block;
    overflow: visible;
}

.footer-content {
    position: relative;
    z-index: 2;
    margin-top: 16rem;
}

.footer-text {
    font-family: var(--font-display);
    font-weight: 300;
    font-style: italic;
    font-size: clamp(1.4rem, 3vw, 2rem);
    color: var(--paper-cream);
    letter-spacing: 0.06em;
}

.footer-korean {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: 1.2rem;
    color: var(--leaf);
    margin-top: 1.2rem;
    opacity: 0.85;
    letter-spacing: 0.4em;
}

.footer-meta {
    font-family: var(--font-label);
    font-size: 0.72rem;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--sapwood);
    margin-top: 2rem;
    opacity: 0.75;
}

.footer-mark {
    font-family: var(--font-label);
    font-size: 0.66rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--birch-light);
    margin-top: 0.8rem;
    opacity: 0.45;
}

/* --------------------------------------------------------
   Responsive
   -------------------------------------------------------- */
@media (max-width: 880px) {
    .branch,
    .branch[data-branch="1"],
    .branch[data-branch="2"],
    .branch[data-branch="3"],
    .branch[data-branch="4"],
    .branch[data-branch="5"],
    .branch[data-branch="6"] {
        width: min(86%, 520px);
        margin-left: auto !important;
        margin-right: auto !important;
        text-align: left;
        border-left: 3px solid var(--bark);
        border-right: none;
    }

    .branch-right { text-align: left; }

    .branch-right .branch-meta li,
    .branch-right .swatch {
        flex-direction: row;
        text-align: left;
    }

    .branch-connector { display: none; }

    .ring-accent { display: none; }

    .palette-grid {
        grid-template-columns: 1fr 1fr;
    }

    .branches-content {
        padding: 5rem 1.2rem 4rem;
    }

    .trunk-line { opacity: 0.18; }

    .forest-nav { top: 1rem; left: 1rem; }
}

@media (max-width: 480px) {
    .palette-grid { grid-template-columns: 1fr; }
    .ring-figure { width: 120px; height: 120px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}