/* ============================================================
   PPZZ.lu — Light-Academia Botanical Field Folio
   Palette: #f4ead8 #e9dcc1 #c2562a #8a3a18 #3a2a1c #7a8a5c #d8c9a3
   Fonts: JetBrains Mono (body), Major Mono Display (labels/numerals),
          Caveat (marginalia)
   ============================================================ */

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

:root {
    --parchment:  #f4ead8;
    --linen:      #e9dcc1;
    --terracotta: #c2562a;
    --sienna:     #8a3a18;
    --walnut:     #3a2a1c;
    --sage:       #7a8a5c;
    --tape:       #d8c9a3;

    --font-body:   'JetBrains Mono', monospace;
    --font-label:  'Major Mono Display', monospace;
    --font-margin: 'Caveat', cursive;
}

html {
    scroll-behavior: smooth;
}

body {
    background: #f4ead8;
    color: #3a2a1c;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.95rem;
    line-height: 1.75;
    letter-spacing: 0.01em;
    margin: 0;
    overflow-x: hidden;
    background-image:
        radial-gradient(ellipse at 20% 30%, rgba(138,58,24,0.025), transparent 60%),
        radial-gradient(ellipse at 70% 80%, rgba(122,138,92,0.02), transparent 50%);
    background-attachment: fixed;
}

strong, em.term {
    color: var(--sienna);
}
strong {
    font-weight: 500;
}

/* ============================================================
   Plane 2 — Pressed specimens (slow scroll, translucent)
   ============================================================ */
.specimen-plane {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: 0;
}
.bg-specimen {
    position: absolute;
    opacity: 0.22;
    will-change: transform;
}
.bg-specimen-1 { width: 220px; left: -40px;  top: 240px; }
.bg-specimen-2 { width: 200px; right: -30px; top: 1100px; }
.bg-specimen-3 { width: 240px; left: -50px;  top: 2300px; }
.bg-specimen-4 { width: 200px; right: -40px; top: 3500px; }

/* ============================================================
   Plane 1 — Reading column
   ============================================================ */
main#folio {
    max-width: 720px;
    margin: 0 auto;
    padding: 12vh 96px;
    position: relative;
    z-index: 1;
}

@media (max-width: 860px) {
    main#folio { padding: 10vh 56px; }
}
@media (max-width: 600px) {
    main#folio { padding: 8vh 24px; }
}

/* ============================================================
   Lesson-number tabs (left gutter, counter-animate numerals)
   ============================================================ */
.tab {
    position: absolute;
    left: 0;
    width: 56px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    z-index: 3;
}
#tab01 { top: 7vh; }
#tab02 { top: calc(7vh + 980px); }
#tab03 { top: calc(7vh + 2080px); }
#tab04 { top: calc(7vh + 3180px); }
#tab05 { top: calc(7vh + 4200px); }

.numeral {
    display: inline-block;
    font-family: var(--font-label);
    font-size: 1.4rem;
    color: var(--terracotta);
    letter-spacing: 0.04em;
    transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    will-change: transform;
}

@media (max-width: 600px) {
    .tab { width: 24px; }
    .numeral { font-size: 1rem; }
}

/* ============================================================
   Pin-tacks
   ============================================================ */
.pin-tack {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--sienna);
    box-shadow: 0 0 0 1px var(--tape), 4px 4px 0 0 rgba(194,86,42,0.18);
}

/* ============================================================
   Frontispiece
   ============================================================ */
.frontispiece {
    position: relative;
    min-height: 70vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 36px;
    padding: 6vh 0 4vh;
}

.specimen-label {
    position: relative;
    border: 1px solid var(--terracotta);
    padding: 28px 40px;
    background: var(--linen);
    transform: rotate(-0.6deg);
    text-align: center;
    box-shadow: 2px 6px 0 rgba(138,58,24,0.06);
}
.label-pin {
    position: absolute;
    top: 10px;
    right: 12px;
}
.tape {
    position: absolute;
    width: 56px;
    height: 12px;
    background: var(--tape);
    opacity: 0.72;
    -webkit-mask-image: linear-gradient(to right, transparent, #000 18%, #000 82%, transparent);
            mask-image: linear-gradient(to right, transparent, #000 18%, #000 82%, transparent);
}
.tape-left  { top: -6px; left: -16px;  transform: rotate(-22deg); }
.tape-right { top: -6px; right: -16px; transform: rotate(18deg); }

.domain-mark {
    font-family: var(--font-label);
    font-size: clamp(2.4rem, 6vw, 4.6rem);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--walnut);
    margin: 0.3em 0 0.35em;
    line-height: 1;
}
.label-line {
    font-family: var(--font-body);
    font-size: 0.62rem;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--terracotta);
    margin: 0;
}
.label-line-bin { color: var(--sage); margin-top: 4px; }

.frontispiece-note {
    max-width: 460px;
    text-align: center;
    color: var(--walnut);
    font-size: 0.9rem;
}

.dried-leaf-float {
    position: absolute;
    top: 4vh;
    left: 50%;
    width: 160px;
    transform: translateX(-58%);
    opacity: 0.5;
    z-index: -1;
    animation: ambientDrift 14s ease-in-out infinite;
}
.dried-leaf-float svg { width: 100%; height: auto; display: block; }

/* ============================================================
   Hairline rule ("next lesson")
   ============================================================ */
.hairline-rule {
    display: flex;
    align-items: center;
    gap: 14px;
    margin: 5.5rem 0;
    color: var(--terracotta);
}
.hairline-rule::before,
.hairline-rule::after {
    content: '';
    flex: 1;
    height: 1px;
    background: rgba(194,86,42,0.4);
}
.hairline-rule span {
    font-family: var(--font-body);
    font-size: 0.58rem;
    letter-spacing: 0.34em;
    text-transform: uppercase;
}

/* ============================================================
   Lessons
   ============================================================ */
.lesson {
    position: relative;
    margin-bottom: 2rem;
}
.lesson-kicker {
    font-family: var(--font-label);
    font-size: 0.8rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--terracotta);
    margin: 0 0 0.4rem;
}
.lesson-title {
    font-family: var(--font-body);
    font-size: clamp(1.4rem, 3.4vw, 2rem);
    font-weight: 500;
    color: var(--walnut);
    letter-spacing: 0.01em;
    margin: 0 0 1.4rem;
    line-height: 1.4;
}
.lesson p {
    margin: 0 0 1.2rem;
    max-width: 60ch;
}
.observe {
    border-left: 2px solid var(--sage);
    padding-left: 1rem;
    color: var(--sienna);
    font-size: 0.9rem;
}
.observe::before {
    content: '✓ ';
    color: var(--sage);
    font-weight: 500;
}

/* ============================================================
   Figures (key diagram, compass)
   ============================================================ */
.key-figure,
.compass-figure {
    margin: 2.5rem 0;
    text-align: center;
}
.key-figure svg {
    width: 100%;
    max-width: 460px;
    height: auto;
}
.compass-figure svg {
    width: 100%;
    max-width: 280px;
    height: auto;
}
.petals {
    transform-origin: 120px 120px;
    transform-box: view-box;
    will-change: transform;
}
figcaption {
    font-family: var(--font-margin);
    font-size: 1rem;
    color: var(--sienna);
    margin-top: 0.8rem;
    line-height: 1.4;
}

.key-q {
    font-family: var(--font-body);
    font-size: 11px;
    fill: var(--walnut);
    letter-spacing: 0.02em;
}
.key-a {
    font-family: var(--font-margin);
    font-size: 13px;
    fill: var(--sienna);
}
.key-letter {
    font-family: var(--font-label);
    font-size: 18px;
    fill: var(--terracotta);
    text-anchor: middle;
}
.compass-dir {
    font-family: var(--font-label);
    font-size: 14px;
    fill: var(--walnut);
    text-anchor: middle;
}

/* ============================================================
   Specimen shelf (Lesson 02)
   ============================================================ */
.specimen-shelf {
    display: flex;
    flex-wrap: wrap;
    gap: 1.4rem;
    justify-content: center;
    margin: 2.5rem 0;
}
.specimen-card {
    position: relative;
    width: 150px;
    background: var(--linen);
    border-left: 2px solid var(--terracotta);
    padding: 14px 12px 16px;
    transform: translateY(0);
    animation: ambientDrift 14s ease-in-out infinite;
    box-shadow: 1px 4px 0 rgba(138,58,24,0.05);
    margin: 0;
}
.specimen-card:nth-child(2) { animation-delay: -3s; }
.specimen-card:nth-child(3) { animation-delay: -6s; }
.specimen-card:nth-child(4) { animation-delay: -9s; }
.specimen-card:nth-child(5) { animation-delay: -11s; }
.specimen-card svg {
    width: 100%;
    height: auto;
    overflow: visible;
    display: block;
}
.card-pin {
    position: absolute;
    top: 8px;
    right: 8px;
}
.tag-num {
    font-family: var(--font-body);
    font-size: 7px;
    fill: var(--terracotta);
    text-anchor: middle;
}
.specimen-card figcaption {
    font-family: var(--font-body);
    font-size: 0.6rem;
    color: var(--walnut);
    margin-top: 0.5rem;
    letter-spacing: 0.01em;
    line-height: 1.5;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.specimen-name {
    color: var(--sienna);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}
.specimen-feat {
    color: var(--sage);
}

/* ============================================================
   Floating glossary cards (right gutter)
   ============================================================ */
.gloss {
    position: absolute;
    right: -200px;
    width: 180px;
    padding: 12px 14px;
    background: var(--linen);
    border-left: 2px solid var(--terracotta);
    font-family: var(--font-margin);
    font-size: 1rem;
    line-height: 1.35;
    color: var(--walnut);
    transform: translateY(0);
    transition: transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
    box-shadow: 1px 3px 0 rgba(138,58,24,0.05);
    will-change: transform;
}
.gloss::before {
    content: '';
    position: absolute;
    top: 10px;
    left: -3px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--terracotta);
    box-shadow: 0 0 0 1px var(--tape);
}
.gloss em {
    color: var(--sienna);
    font-style: italic;
}
.gloss01 { top: 38%; }
.gloss02 { top: 30%; }
.gloss03 { top: 34%; }
.gloss04a { top: 22%; }
.gloss04b { top: 48%; }

/* On narrow viewports, drop gloss cards inline below the section */
@media (max-width: 1180px) {
    .gloss {
        position: relative;
        right: auto;
        width: auto;
        max-width: 60ch;
        margin: 1.5rem 0 0;
        top: auto !important;
        transform: none !important;
        transition: none;
    }
}

/* ============================================================
   Colophon
   ============================================================ */
.colophon {
    position: relative;
    text-align: center;
    padding: 4rem 0 8rem;
}
.lion-watermark {
    width: 200px;
    margin: 0 auto 1.5rem;
    opacity: 0.18;
}
.lion-watermark svg { width: 100%; height: auto; display: block; }
.colophon-line {
    font-family: var(--font-body);
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--sienna);
    margin: 0 0 0.4rem;
}
.colophon-date {
    font-family: var(--font-label);
    font-size: 0.9rem;
    letter-spacing: 0.14em;
    color: var(--terracotta);
    margin: 0;
}
.pressed-flower {
    position: relative;
    width: 110px;
    margin: 2rem auto 0;
    opacity: 0.7;
    animation: ambientDrift 14s ease-in-out infinite;
    animation-delay: -5s;
}
.pressed-flower svg { width: 100%; height: auto; display: block; }
.tape-colophon {
    position: absolute;
    width: 56px;
    height: 12px;
    background: var(--tape);
    opacity: 0.72;
    top: -8px;
    left: 50%;
    transform: translateX(-50%) rotate(-7deg);
    -webkit-mask-image: linear-gradient(to right, transparent, #000 18%, #000 82%, transparent);
            mask-image: linear-gradient(to right, transparent, #000 18%, #000 82%, transparent);
}

/* ============================================================
   Progress reed (right viewport edge)
   ============================================================ */
.reed {
    position: fixed;
    right: 16px;
    top: 12vh;
    bottom: 12vh;
    width: 1px;
    background: rgba(194,86,42,0.25);
    z-index: 5;
    pointer-events: none;
}
.reed-fill {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: var(--terracotta);
}
.reed-tick {
    position: absolute;
    left: -3px;
    width: 7px;
    height: 1px;
    background: var(--terracotta);
}

@media (max-width: 600px) {
    .reed { right: 6px; }
}

/* ============================================================
   Keyframes
   ============================================================ */
@keyframes ambientDrift {
    0%   { transform: translateY(-6px); }
    50%  { transform: translateY(6px); }
    100% { transform: translateY(-6px); }
}
.frontispiece .dried-leaf-float {
    /* preserve the centering translateX while drifting */
    animation-name: ambientDriftCentered;
}
@keyframes ambientDriftCentered {
    0%   { transform: translateX(-58%) translateY(-6px); }
    50%  { transform: translateX(-58%) translateY(6px); }
    100% { transform: translateX(-58%) translateY(-6px); }
}
.pressed-flower {
    animation-name: ambientDrift;
}

/* ============================================================
   Annotation underline draw-on (small squiggle)
   ============================================================ */
.gloss-underline {
    stroke: var(--terracotta);
    stroke-width: 1;
    fill: none;
    stroke-dasharray: 120;
    stroke-dashoffset: 120;
    transition: stroke-dashoffset 1s ease;
}
.gloss.drawn .gloss-underline {
    stroke-dashoffset: 0;
}