/* =========================================================================
   namu.biz — a dendrological agency
   Color palette (forest-stewardship ledger):
     #F2EBDA  paper cream
     #1F2017  bog ink
     #5A4A2E  dendrometer brass
     #7C5A2A  heartwood ochre
     #3F5A3A  cambium green
     #A4824D  resin amber
     #262A1E  soil shadow
   Type: Cormorant Garamond / Source Serif 4 / IM Fell DW Pica
   ========================================================================= */

:root {
    --paper-cream: #F2EBDA;
    --bog-ink: #1F2017;
    --dendrometer-brass: #5A4A2E;
    --heartwood-ochre: #7C5A2A;
    --cambium-green: #3F5A3A;
    --resin-amber: #A4824D;
    --soil-shadow: #262A1E;

    --font-display: "Cormorant Garamond", "Lora", Georgia, serif;
    --font-body: "Source Serif 4", "Source Serif Pro", Georgia, serif;
    --font-old: "IM Fell DW Pica", "Source Serif 4", Georgia, serif;

    --rhythm: 8px;
    --measure: 60ch;
    --soil-line-y: 78vh;
}

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

html {
    scroll-behavior: smooth;
    background: var(--paper-cream);
}

body {
    margin: 0;
    padding: 0;
    background: var(--paper-cream);
    color: var(--bog-ink);
    font-family: var(--font-body);
    font-size: 16.5px;
    line-height: 1.68;
    overflow-x: hidden;
    cursor: none;

    /* paper-aged texture: subtle 1.5% noise overlay */
    background-image:
        radial-gradient(circle at 20% 8%, rgba(31, 32, 23, 0.012) 0 1px, transparent 2px),
        radial-gradient(circle at 60% 30%, rgba(31, 32, 23, 0.014) 0 1px, transparent 2px),
        radial-gradient(circle at 80% 60%, rgba(31, 32, 23, 0.012) 0 1px, transparent 2px),
        radial-gradient(circle at 30% 80%, rgba(31, 32, 23, 0.013) 0 1px, transparent 2px),
        radial-gradient(circle at 90% 90%, rgba(31, 32, 23, 0.012) 0 1px, transparent 2px);
    background-size: 7px 7px, 11px 11px, 13px 13px, 17px 17px, 19px 19px;
    background-attachment: fixed;
}

p { margin: 0 0 1.1em 0; }
em { font-style: italic; }

/* =========================================================================
   Annual-Ring Cursor
   ========================================================================= */
.ring-cursor {
    position: fixed;
    top: 0; left: 0;
    width: 40px; height: 40px;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    mix-blend-mode: multiply;
    transition: transform 80ms linear;
}

/* =========================================================================
   Chapter scaffold
   ========================================================================= */
.chapter {
    position: relative;
    width: 100%;
    padding: 14vh 6vw 10vh 6vw;
    min-height: 100vh;
}

.chapter-head {
    max-width: 920px;
    margin: 0 auto 7vh auto;
    position: relative;
}

.chapter-num {
    font-family: var(--font-old);
    font-style: italic;
    font-size: 11px;
    color: var(--dendrometer-brass);
    letter-spacing: 0.18em;
    text-transform: lowercase;
    display: inline-block;
    margin-right: 1.2em;
}

.chapter-sigil {
    display: inline-block;
    vertical-align: middle;
    margin-right: 0.7em;
}
.chapter-sigil svg { display: block; }

.chapter-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(2.6rem, 5.4vw, 4.4rem);
    line-height: 1.08;
    letter-spacing: -0.012em;
    margin: 0.3em 0 0.8em 0;
    color: var(--bog-ink);
}
.chapter-title em {
    font-style: italic;
    font-weight: 500;
    color: var(--dendrometer-brass);
}

.chapter-lede {
    font-family: var(--font-body);
    font-size: 1.05rem;
    max-width: 56ch;
    color: var(--bog-ink);
    opacity: 0.86;
    margin-top: 0.6em;
}

.propagule-rule {
    display: flex;
    align-items: center;
    gap: 0.6em;
    margin: 0.4em 0 1.6em 0;
    width: 100%;
    max-width: 560px;
}
.propagule-line {
    height: 1px;
    background: var(--dendrometer-brass);
    flex: 0 0 60px;
}
.propagule-line-long { flex: 1 1 auto; }
.propagule-mark { flex: 0 0 8px; display: block; }

/* =========================================================================
   §01 — CANOPY
   ========================================================================= */
.chapter-canopy {
    min-height: 110vh;
    padding: 14vh 6vw 4vh 6vw;
    position: relative;
}

.canopy-inner {
    text-align: center;
    margin-top: 12vh;
}

.wordmark-han {
    font-family: var(--font-display);
    font-style: italic;
    font-weight: 500;
    font-size: clamp(4.4rem, 9vw, 7.2rem);
    line-height: 1;
    letter-spacing: -0.02em;
    color: var(--bog-ink);
    margin: 0 0 0.4em 0;
    /* very faint wood-block shadow — hand inking irregularity */
    text-shadow:
        0.5px 0 0 rgba(31, 32, 23, 0.18),
        -0.3px 0.4px 0 rgba(31, 32, 23, 0.12);
}

.wordmark-rom {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.32em;
    color: var(--dendrometer-brass);
    margin: 0;
}

/* Soil line — recurring geometric anchor at 78vh */
.soil-line {
    position: absolute;
    left: 0; right: 0;
    top: var(--soil-line-y);
    display: flex;
    align-items: center;
    pointer-events: none;
}
.soil-line-rule {
    flex: 1 1 auto;
    height: 2px;
    background: var(--bog-ink);
    margin-left: 6vw;
}
.soil-line-label {
    font-family: var(--font-old);
    font-style: italic;
    font-size: 9px;
    color: var(--bog-ink);
    letter-spacing: 0.12em;
    padding: 0 0.7em;
    background: var(--paper-cream);
    margin-right: 6vw;
}

.canopy-footnote {
    position: absolute;
    bottom: 4vh;
    left: 6vw;
    right: 6vw;
    display: flex;
    justify-content: space-between;
    font-family: var(--font-old);
    font-style: italic;
    font-size: 11px;
    color: var(--dendrometer-brass);
    letter-spacing: 0.06em;
}
.canopy-footnote p { margin: 0; }
.canopy-meta { text-align: right; }

/* =========================================================================
   §02 — XYLEM CHANNELS
   ========================================================================= */
.chapter-xylem {
    background:
        linear-gradient(
            to bottom,
            var(--paper-cream) 0%,
            var(--paper-cream) 100%);
    padding-bottom: 14vh;
    position: relative;
}

.xylem-grid {
    display: flex;
    justify-content: center;
    gap: 88px;
    margin: 0 auto;
    max-width: 1160px;
    flex-wrap: wrap;
    position: relative;
}

.vessel {
    width: 14ch;
    min-width: 180px;
    position: relative;
    padding-left: 28px;
}

.vessel-edge {
    position: absolute;
    left: 0;
    top: 0;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    font-family: var(--font-display);
    font-style: italic;
    font-weight: 500;
    font-size: 1.05rem;
    color: var(--dendrometer-brass);
    letter-spacing: 0.06em;
    text-transform: lowercase;
    border-right: 1px solid var(--dendrometer-brass);
    padding-right: 6px;
    height: 100%;
}

.vessel-body {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.pellet {
    border: 0.5px solid var(--resin-amber);
    padding: 14px 14px 12px 14px;
    background: var(--paper-cream);
    position: relative;
    overflow: hidden;
    transition: border-color 600ms ease;
}
.pellet::before {
    /* the "water rising" fill */
    content: "";
    position: absolute;
    left: 0; right: 0;
    bottom: 0;
    height: 0%;
    background: linear-gradient(
        to top,
        rgba(124, 90, 42, 0.18) 0%,
        rgba(124, 90, 42, 0.10) 60%,
        rgba(124, 90, 42, 0.0) 100%);
    transition: height 900ms cubic-bezier(0.22, 0.61, 0.36, 1);
    pointer-events: none;
}
.pellet[data-filled="1"]::before { height: 100%; }
.pellet p {
    margin: 0;
    font-family: var(--font-body);
    font-size: 14px;
    line-height: 1.55;
    color: var(--bog-ink);
    position: relative;
    z-index: 1;
}
.pellet em {
    font-style: italic;
    color: var(--dendrometer-brass);
}

/* The Dendrometer */
.dendrometer {
    position: absolute;
    top: 12vh;
    right: 4vw;
    width: 220px;
    height: 220px;
    pointer-events: none;
}

/* =========================================================================
   §03 — GROWTH RINGS
   ========================================================================= */
.chapter-rings {
    padding-top: 12vh;
    padding-bottom: 14vh;
}

.rings-stage {
    position: relative;
    width: 100%;
    max-width: 920px;
    margin: 0 auto;
    aspect-ratio: 1 / 1;
}

#ringsSvg {
    width: 100%;
    height: auto;
    display: block;
}

#ringsSvg .ring {
    fill: none;
    stroke: var(--bog-ink);
    stroke-width: 1;
    transition: stroke-width 400ms ease, stroke 400ms ease;
}
#ringsSvg .ring.thick {
    stroke-width: 1.5;
    stroke: var(--heartwood-ochre);
}
#ringsSvg .ring:hover {
    stroke-width: 1.8;
    stroke: var(--cambium-green);
}

#ringsSvg .ring-label {
    font-family: var(--font-old);
    font-style: italic;
    font-size: 9px;
    fill: var(--bog-ink);
    pointer-events: none;
}

.specimen-tag {
    position: absolute;
    background: var(--paper-cream);
    border: 0.5px solid var(--dendrometer-brass);
    padding: 8px 14px 9px 14px;
    font-family: var(--font-old);
    font-style: italic;
    font-size: 11px;
    color: var(--bog-ink);
    pointer-events: none;
    opacity: 0;
    transform: translate(-50%, -120%);
    transition: opacity 220ms ease;
    min-width: 180px;
    max-width: 240px;
    z-index: 10;
}
.specimen-tag.visible { opacity: 1; }
.specimen-tag-twine {
    position: absolute;
    top: -12px;
    left: 50%;
    width: 1px;
    height: 12px;
    background: var(--dendrometer-brass);
    transform: translateX(-50%);
}
.specimen-tag-twine::after {
    content: "";
    position: absolute;
    top: -3px; left: 50%;
    transform: translateX(-50%);
    width: 6px; height: 6px;
    border: 0.5px solid var(--dendrometer-brass);
    border-radius: 50%;
}
.specimen-tag-num {
    display: block;
    font-family: var(--font-old);
    font-style: italic;
    font-size: 9px;
    color: var(--dendrometer-brass);
    letter-spacing: 0.08em;
    margin-bottom: 4px;
}
.specimen-tag-text {
    display: block;
    font-family: var(--font-body);
    font-style: italic;
    font-size: 12px;
    line-height: 1.4;
    color: var(--bog-ink);
}

.rings-caption {
    text-align: center;
    font-family: var(--font-old);
    font-style: italic;
    font-size: 12px;
    color: var(--dendrometer-brass);
    margin-top: 4vh;
    letter-spacing: 0.04em;
}

/* =========================================================================
   §04 — CAMBIUM
   ========================================================================= */
.chapter-cambium {
    padding-top: 14vh;
    padding-bottom: 14vh;
}

.cambium-spread {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 88px;
    max-width: 1100px;
    margin: 0 auto;
    align-items: start;
}

.lignin-rail {
    width: 280px;
    height: 1100px;
    border-left: 0.5px solid var(--dendrometer-brass);
    border-right: 0.5px solid var(--dendrometer-brass);
    background: var(--paper-cream);
    position: sticky;
    top: 4vh;
}
.lignin-rail svg { display: block; width: 100%; height: 100%; }

.knot-region {
    cursor: none;
    transition: opacity 220ms ease;
}
.knot-region:hover { opacity: 0.55; }

.knot-annotation {
    position: absolute;
    background: var(--paper-cream);
    border: 0.5px solid var(--cambium-green);
    padding: 6px 10px;
    font-family: var(--font-old);
    font-style: italic;
    font-size: 11px;
    color: var(--cambium-green);
    pointer-events: none;
    opacity: 0;
    transform: translate(0, -50%);
    transition: opacity 240ms ease;
    z-index: 5;
    white-space: nowrap;
}
.knot-annotation.visible { opacity: 1; }

.cambium-prose {
    max-width: var(--measure);
    font-family: var(--font-body);
    font-size: 16.5px;
    line-height: 1.68;
    color: var(--bog-ink);
}
.cambium-prose p {
    margin: 0 0 1.4em 0;
}

.team-tag {
    position: relative;
    border-bottom: 0.5px dotted var(--cambium-green);
    transition: color 240ms ease, background 240ms ease;
}
.team-tag em {
    color: var(--dendrometer-brass);
    font-style: italic;
}
.team-tag:hover {
    background: rgba(63, 90, 58, 0.08);
}

.cambium-footnote {
    margin-top: 3em !important;
    padding-top: 1.6em;
    border-top: 0.5px solid var(--dendrometer-brass);
    font-size: 14px;
    color: var(--dendrometer-brass);
    font-style: italic;
}

/* =========================================================================
   §05 — ROOT SYSTEM
   ========================================================================= */
.chapter-roots {
    background: linear-gradient(
        to bottom,
        var(--paper-cream) 0,
        var(--paper-cream) 6%,
        rgba(38, 42, 30, 0.06) 8%,
        rgba(38, 42, 30, 0.06) 100%);
    padding-top: 0;
    padding-bottom: 8vh;
    color: var(--bog-ink);
    position: relative;
}

.below-soil-line {
    width: 100%;
    display: flex;
    align-items: center;
    margin: 0 0 5vh 0;
    padding-top: 6vh;
}
.below-soil-line .soil-line-rule {
    flex: 1 1 auto;
    height: 2px;
    background: var(--bog-ink);
    margin-left: 6vw;
}
.below-soil-line .soil-line-label {
    font-family: var(--font-old);
    font-style: italic;
    font-size: 9px;
    color: var(--bog-ink);
    letter-spacing: 0.12em;
    padding: 0 0.7em;
    margin-right: 6vw;
    background: var(--paper-cream);
}

.chapter-head-inverted {
    text-align: left;
}

.taproot-stage {
    position: relative;
    max-width: 1200px;
    margin: 6vh auto 0 auto;
    min-height: 720px;
}

#taprootSvg {
    display: block;
    width: 100%;
    height: auto;
    pointer-events: none;
}

.root-form {
    position: absolute;
    width: 280px;
    font-family: var(--font-body);
    font-size: 13px;
}
.root-form-left   { top: 280px; left: 2%; }
.root-form-center { top: 480px; left: 50%; transform: translateX(-50%); }
.root-form-right  { top: 280px; right: 2%; }

.root-form-label {
    display: block;
    font-family: var(--font-old);
    font-style: italic;
    font-size: 10px;
    color: var(--dendrometer-brass);
    letter-spacing: 0.1em;
    margin-bottom: 0.8em;
    text-transform: lowercase;
}

.root-input-row {
    display: flex;
    align-items: baseline;
    gap: 0.6em;
    margin-bottom: 0.7em;
    border-bottom: 0.5px solid var(--dendrometer-brass);
    padding-bottom: 0.3em;
}
.root-prompt {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 12px;
    color: var(--dendrometer-brass);
    flex: 0 0 auto;
}
.root-input {
    flex: 1 1 auto;
    background: transparent;
    border: 0;
    outline: none;
    font-family: var(--font-body);
    font-style: italic;
    font-size: 13px;
    color: var(--bog-ink);
    padding: 2px 0;
    cursor: text;
}
.root-input-wide {
    width: 100%;
}

.root-submit {
    margin-top: 0.6em;
    background: transparent;
    border: 0;
    border-bottom: 0.5px dotted var(--cambium-green);
    color: var(--cambium-green);
    font-family: var(--font-display);
    font-style: italic;
    font-size: 12px;
    padding: 4px 0;
    cursor: none;
    letter-spacing: 0.05em;
    transition: color 240ms ease, border-color 240ms ease;
}
.root-submit:hover {
    color: var(--heartwood-ochre);
    border-color: var(--heartwood-ochre);
}
.root-submit.sent {
    color: var(--dendrometer-brass);
    border-color: var(--dendrometer-brass);
}

/* Linnaean specimen plates */
.specimen-plates {
    display: flex;
    justify-content: space-between;
    gap: 24px;
    max-width: 1100px;
    margin: 8vh auto 6vh auto;
    flex-wrap: wrap;
    padding: 4vh 0 4vh 0;
    border-top: 0.5px solid var(--dendrometer-brass);
    border-bottom: 0.5px solid var(--dendrometer-brass);
}
.specimen-plate {
    margin: 0;
    text-align: center;
    flex: 1 1 130px;
    max-width: 180px;
}
.specimen-plate svg { display: block; margin: 0 auto; }
.specimen-plate figcaption {
    margin-top: 0.7em;
    font-family: var(--font-old);
    font-style: italic;
    font-size: 11px;
    color: var(--bog-ink);
    line-height: 1.4;
}
.specimen-plate figcaption span {
    display: block;
    color: var(--dendrometer-brass);
    font-size: 9px;
    letter-spacing: 0.08em;
    margin-top: 0.2em;
}

.legal-footer {
    text-align: center;
    margin: 8vh auto 0 auto;
    padding-top: 3vh;
    border-top: 0.5px solid var(--bog-ink);
    max-width: 720px;
}
.legal-footer p {
    font-family: var(--font-old);
    font-style: italic;
    font-size: 9px;
    letter-spacing: 0.18em;
    color: var(--bog-ink);
    text-transform: uppercase;
    margin-bottom: 0.6em;
}
.legal-footer .legal-sub {
    text-transform: none;
    letter-spacing: 0.04em;
    font-size: 10px;
    color: var(--dendrometer-brass);
}

.consents-root {
    max-width: 380px;
    margin: 6vh auto 0 auto;
    padding: 1.4em 1.6em;
    border-left: 0.5px solid var(--cambium-green);
    background: rgba(63, 90, 58, 0.04);
    font-family: var(--font-body);
    font-size: 12px;
    line-height: 1.6;
    color: var(--bog-ink);
}
.consents-root .consents-label {
    display: block;
    font-family: var(--font-old);
    font-style: italic;
    font-size: 10px;
    color: var(--cambium-green);
    letter-spacing: 0.1em;
    margin-bottom: 0.6em;
    text-transform: lowercase;
}
.consents-root p { margin: 0; }

/* =========================================================================
   Chapter title swash draw — cosmetic transition reveal
   ========================================================================= */
.chapter-title {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 900ms ease, transform 900ms ease;
}
.chapter-title.revealed {
    opacity: 1;
    transform: translateY(0);
}
.chapter-canopy .wordmark-han,
.chapter-canopy .wordmark-rom {
    opacity: 0;
    animation: wordmark-fade 1400ms ease 200ms forwards;
}
.chapter-canopy .wordmark-rom {
    animation-delay: 700ms;
}
@keyframes wordmark-fade {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* =========================================================================
   Chapter cream crossfade overlay
   ========================================================================= */
.crossfade-veil {
    position: fixed;
    inset: 0;
    background: var(--paper-cream);
    pointer-events: none;
    opacity: 0;
    z-index: 8000;
    transition: opacity 1200ms ease;
}
.crossfade-veil.active {
    opacity: 0.85;
}

/* =========================================================================
   Responsive
   ========================================================================= */
@media (max-width: 980px) {
    .xylem-grid { gap: 36px; }
    .vessel { width: 100%; min-width: unset; }
    .cambium-spread { grid-template-columns: 1fr; }
    .lignin-rail { display: none; }
    .dendrometer { display: none; }
    .root-form-left, .root-form-right, .root-form-center {
        position: static;
        transform: none;
        margin: 2vh auto;
        width: 90%;
    }
    .taproot-stage { min-height: auto; }
    #taprootSvg { display: none; }
    .specimen-plates { gap: 12px; padding: 3vh 0; }
    .specimen-plate { flex: 1 1 28%; }
    body { cursor: default; }
    .ring-cursor { display: none; }
    .root-input, .root-submit { cursor: auto; }
    .root-submit { cursor: pointer; }
}