/* ==========================================================
   layer-2.quest — Victorian Botanical × Blockchain Scaling
   Interactive Behaviors:** Behaviors* Behaviors** Behaviors: Behaviors:: Behaviors::: Behaviors:* Behaviors*** Interactive elements IntersectionObserver to detect when blocks enter the viewport. Each block starts with `opacity: 0
   ========================================================== */

/* --- Paper grain texture (tiny inline noise) --- */
:root {
    --parchment: #FCF8F0;
    --mahogany: #2C1810;
    --walnut: #3D2B1F;
    --gold: #8B6914;
    --teal: #1B6B6F;
    --oxblood: #5B1A0E;
    --verdigris: #4A9B8F;
    --sage: #C5CDB0;
    --leather: #5B3A29;
    --warm-parchment: #F5E6C8;
}

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

body {
    font-family: 'Libre Baskerville', Lora, Georgia, serif;
    background-color: var(--parchment);
    color: var(--walnut);
    line-height: 1.72;
    letter-spacing: 0.01em;
    background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAQAAAAECAYAAACp8Z5+AAAAJklEQVQIW2NkYPj/n4EBBBgZGRlBNJMDEwMDIxMDA8P/////AwAVhgQnMpOYpAAAAABJRU5ErkJggg==");
    background-repeat: repeat;
}

html {
    scroll-behavior: smooth;
}

/* ---- Typography ---- */
h1, h2, h3 {
    font-family: 'Bebas Neue', Impact, 'Arial Narrow', sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    line-height: 1.05;
    color: var(--mahogany);
    font-weight: 400;
}

.plate-label {
    display: block;
    font-family: 'IM Fell English SC', serif;
    font-size: 12px;
    letter-spacing: 0.15em;
    color: var(--gold);
    margin-bottom: 8px;
}

/* ---- Thin scholarly top bar ---- */
.topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 20;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    border-bottom: 1px solid var(--leather);
    background: rgba(252, 248, 240, 0.72);
    transition: background 0.3s ease, backdrop-filter 0.3s ease, box-shadow 0.3s ease;
}

.topbar.scrolled {
    background: rgba(252, 248, 240, 0.92);
    backdrop-filter: blur(8px);
    box-shadow: 0 8px 22px rgba(44, 24, 16, 0.06);
}

.topbar::before,
.topbar::after {
    content: '';
    position: absolute;
    bottom: -6px;
    width: 18px;
    height: 18px;
    border-bottom: 1px solid var(--leather);
}

.topbar::before {
    left: 12px;
    border-left: 1px solid var(--leather);
}

.topbar::after {
    right: 12px;
    border-right: 1px solid var(--leather);
}

.topbar-mark {
    font-family: 'Bebas Neue', Impact, 'Arial Narrow', sans-serif;
    font-size: 24px;
    letter-spacing: 0.08em;
    color: var(--mahogany);
    background-image: none;
}

.topbar-links {
    display: flex;
    gap: 24px;
}

.topbar-links a {
    font-family: 'Libre Baskerville', Lora, Georgia, serif;
    font-size: 13px;
    font-style: italic;
}

.drop-cap {
    float: left;
    font-family: 'IM Fell English SC', serif;
    font-size: 72px;
    line-height: 0.8;
    color: var(--oxblood);
    margin-right: 8px;
    margin-top: 4px;
}

.drop-cap-wrap {
    position: relative;
    float: left;
    width: 58px;
    height: 66px;
    margin-right: 8px;
}

.drop-cap-wrap .drop-cap {
    float: none;
    margin: 0;
}

.drop-vine {
    position: absolute;
    left: -6px;
    top: -6px;
    width: 68px;
    height: 86px;
    overflow: visible;
    pointer-events: none;
}

.drop-vine path {
    fill: none;
    stroke: var(--gold);
    stroke-width: 1.2;
    stroke-linecap: round;
    stroke-dasharray: 132;
    stroke-dashoffset: 132;
    transition: stroke-dashoffset 1.5s ease;
}

.specimen:hover .drop-vine path {
    stroke-dashoffset: 0;
}

/* ---- Hero ---- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px;
    padding-top: 72px;
}

.hero-border {
    position: relative;
    border: 2px solid var(--gold);
    padding: 64px 80px;
    text-align: center;
}

.corner-ornament {
    position: absolute;
}
.corner-tl { top: -8px; left: -8px; }
.corner-tr { top: -8px; right: -8px; }
.corner-bl { bottom: -8px; left: -8px; }
.corner-br { bottom: -8px; right: -8px; }

.hero-title {
    font-size: clamp(3rem, 8vw, 7rem);
    color: var(--mahogany);
    margin-bottom: 12px;
}

.hero-border::before,
.hero-border::after {
    content: '';
    position: absolute;
    inset: 14px;
    border: 1px solid rgba(139, 105, 20, 0.38);
    pointer-events: none;
}

.hero-border::after {
    inset: 24px;
    border-style: dotted;
    opacity: 0.58;
}

.hero-subtitle {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    color: var(--walnut);
    font-weight: 400;
}

.scroll-cue {
    font-family: 'IM Fell English SC', serif;
    font-size: 14px;
    letter-spacing: 0.12em;
    color: var(--gold);
    margin-top: 40px;
    animation: pulse-cue 2s ease-in-out infinite;
}

@keyframes pulse-cue {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

/* ---- Divider ---- */
.divider {
    border: none;
    height: 1px;
    background: var(--gold);
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    opacity: 0.5;
}

.divider::before {
    content: '❧';
    font-family: 'IM Fell English SC', serif;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background: var(--parchment);
    padding: 0 12px;
    color: var(--gold);
    font-size: 18px;
}

.grid-divider {
    grid-column: 1 / -1;
    padding: 20px 0;
}

/* ---- Herbarium Grid ---- */
.herbarium {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 20px;
    padding: 40px;
    max-width: 1400px;
    margin: 40px auto;
}

/* ---- Specimen Base ---- */
.specimen {
    background: var(--parchment);
    border: 1px solid var(--gold);
    position: relative;
    box-shadow: inset 0 0 0 5px rgba(139, 105, 20, 0.035);
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    transition-delay: var(--delay, 0s);
}

.specimen::before,
.specimen::after {
    content: '✥';
    position: absolute;
    width: 32px;
    height: 32px;
    color: var(--gold);
    font-family: 'IM Fell English SC', serif;
    font-size: 19px;
    line-height: 32px;
    text-align: center;
    opacity: 0.72;
    pointer-events: none;
}

.specimen::before {
    top: 4px;
    left: 4px;
}

.specimen::after {
    right: 4px;
    bottom: 4px;
    transform: rotate(180deg);
}

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

.specimen:nth-child(3n+1) { --delay: 0s; }
.specimen:nth-child(3n+2) { --delay: 0.12s; }
.specimen:nth-child(3n+3) { --delay: 0.24s; }

.specimen:nth-child(4n+1) { margin-top: 0; }
.specimen:nth-child(4n+2) { margin-top: 12px; }
.specimen:nth-child(4n+3) { margin-top: 24px; }
.specimen:nth-child(4n) { margin-top: 36px; }

.specimen:hover {
    border-color: var(--oxblood);
    box-shadow: 0 4px 20px rgba(91, 26, 14, 0.08);
}

/* ---- Specimen Variants ---- */
.specimen--card {
    grid-column: span 4;
    padding: 32px;
}

.specimen--folio {
    grid-column: span 8;
    grid-row: span 2;
    padding: 40px 48px;
}

.specimen--folio::after {
    content: '';
    position: absolute;
    top: 30px;
    bottom: 30px;
    left: 50%;
    width: 2px;
    background: linear-gradient(180deg, transparent, rgba(139, 105, 20, 0.65) 12%, rgba(139, 105, 20, 0.65) 88%, transparent);
    transform: translateX(-50%);
    opacity: 0.36;
}

.specimen--folio .botanical-svg {
    position: relative;
    z-index: 1;
}

.specimen--medallion {
    grid-column: span 3;
    aspect-ratio: 1;
    border-radius: 50%;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 24px;
    transition: opacity 0.6s ease, transform 0.6s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.specimen--medallion.visible {
    opacity: 1;
    transform: translateY(0);
}

.specimen--medallion.visible:hover {
    transform: rotate(2deg) scale(1.03);
}

.specimen--full {
    grid-column: 1 / -1;
    grid-row: span 2;
    padding: 48px 64px;
}

/* ---- Specimen Content ---- */
.specimen-heading {
    font-size: clamp(1.4rem, 3vw, 2.2rem);
    margin-bottom: 16px;
}

.medallion-heading {
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    margin-bottom: 8px;
}

.specimen-body {
    font-size: clamp(0.95rem, 1.8vw, 1.1rem);
    margin-bottom: 12px;
    color: var(--walnut);
}

.specimen-body em {
    color: var(--teal);
}

.specimen-body sup,
.field-note {
    font-family: 'Libre Baskerville', Lora, Georgia, serif;
    font-style: italic;
    color: var(--gold);
}

/* ---- Botanical SVGs ---- */
.botanical-svg {
    display: block;
    margin: 24px auto 0;
    max-width: 100%;
    height: auto;
}

.botanical-small {
    max-width: 180px;
}

.botanical-panoramic {
    max-width: 100%;
    margin-top: 32px;
}

/* ---- Links ---- */
a {
    color: var(--gold);
    text-decoration: none;
    background-image: linear-gradient(var(--teal), var(--teal));
    background-position: 0% 100%;
    background-repeat: no-repeat;
    background-size: 0% 1px;
    transition: color 0.3s ease, background-size 0.3s ease;
}

a:hover {
    color: var(--teal);
    background-size: 100% 1px;
}

/* ---- Closing Ornament ---- */
.closing-ornament {
    text-align: center;
    margin-top: 32px;
}

/* ---- Footer ---- */
.site-footer {
    text-align: center;
    padding: 48px 40px;
    border-top: 1px solid var(--gold);
    margin-top: 40px;
}

.footer-text {
    font-family: 'IM Fell English SC', serif;
    font-size: 14px;
    letter-spacing: 0.12em;
    color: var(--gold);
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
    .herbarium {
        grid-template-columns: repeat(6, 1fr);
        padding: 20px;
    }

    .specimen--card {
        grid-column: span 6;
    }

    .specimen--folio {
        grid-column: span 6;
    }

    .specimen--medallion {
        grid-column: span 3;
    }

    .specimen--full {
        padding: 32px 24px;
    }

    .hero-border {
        padding: 40px 32px;
    }
}

@media (max-width: 768px) {
    .topbar {
        padding: 0 20px;
    }

    .topbar-links {
        gap: 12px;
    }

    .herbarium {
        grid-template-columns: repeat(4, 1fr);
    }

    .specimen--card,
    .specimen--folio,
    .specimen--full {
        grid-column: span 4;
    }

    .specimen--medallion {
        grid-column: span 2;
    }

    .specimen:nth-child(odd) { margin-top: 0; }
    .specimen:nth-child(even) { margin-top: 8px; }
}

@media (max-width: 600px) {
    .topbar {
        height: auto;
        min-height: 48px;
        align-items: flex-start;
        flex-direction: column;
        gap: 2px;
        padding: 6px 16px;
    }

    .topbar-links {
        flex-wrap: wrap;
    }

    .herbarium {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .specimen--card,
    .specimen--folio,
    .specimen--medallion,
    .specimen--full {
        grid-column: span 1;
    }

    .specimen--medallion {
        aspect-ratio: auto;
        border-radius: 24px;
    }

    .specimen {
        margin-top: 0 !important;
    }

    .specimen--folio::after {
        display: none;
    }
}