/* ==========================================================================
   yongzoon.com - Botanical Codex Styles
   A digital herbarium of ideas
   ========================================================================== */

/* CSS Custom Properties */
:root {
    --bg-parchment: #F5F0E8;
    --bg-aged: #F2EBDF;
    --text-walnut: #3B3028;
    --text-sage: #7A6F5D;
    --accent-fern: #5B7A5E;
    --accent-rose: #C4937A;
    --highlight-chamomile: #E8D5A3;
    --rule-twig: #B8A88A;
    --deep-root: #4A3728;
    --margin-bg: #EDE7DA;
    --ease-natural: cubic-bezier(0.25, 0.1, 0.25, 1.0);
}

/* ==========================================================================
   Base Reset & Typography
   ========================================================================== */

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

html {
    font-size: 18px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Lora', Georgia, serif;
    font-weight: 400;
    line-height: 1.7;
    color: var(--text-walnut);
    background-color: var(--bg-parchment);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Faint ruled lines behind text */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: repeating-linear-gradient(
        to bottom,
        transparent,
        transparent calc(1.7em - 1px),
        rgba(184, 168, 138, 0.03) calc(1.7em - 1px),
        rgba(184, 168, 138, 0.03) 1.7em
    );
    pointer-events: none;
    z-index: 0;
}

/* ==========================================================================
   Header
   ========================================================================== */

#site-header {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 15vh 0 0 8vw;
    overflow: hidden;
    background-color: var(--bg-parchment);
}

.header-content {
    position: relative;
    z-index: 2;
}

#site-title {
    font-family: 'Cormorant Garamond', 'Georgia', serif;
    font-weight: 600;
    font-size: clamp(2.5rem, 6vw, 4rem);
    letter-spacing: -0.01em;
    line-height: 1.15;
    color: var(--text-walnut);
    visibility: hidden;
}

#site-title.typewriter-active,
#site-title.typewriter-done {
    visibility: visible;
}

#site-subtitle {
    font-family: 'EB Garamond', 'Georgia', serif;
    font-weight: 400;
    font-style: italic;
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    color: var(--text-sage);
    margin-top: 0.8rem;
    visibility: hidden;
}

#site-subtitle.typewriter-active,
#site-subtitle.typewriter-done {
    visibility: visible;
}

.typewriter-cursor {
    display: inline-block;
    width: 2px;
    height: 1em;
    background-color: var(--text-walnut);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: blink 530ms step-end infinite;
}

.typewriter-cursor.fade-out {
    animation: cursorFade 400ms var(--ease-natural) forwards;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

@keyframes cursorFade {
    from { opacity: 1; }
    to { opacity: 0; }
}

.header-fern-watermark {
    position: absolute;
    right: -5vw;
    top: 10%;
    width: 35vw;
    max-width: 400px;
    height: auto;
    z-index: 1;
}

/* ==========================================================================
   Page Fold Shadow
   ========================================================================== */

.page-fold-shadow {
    position: fixed;
    left: 0;
    top: 0;
    width: 40px;
    height: 100%;
    background: linear-gradient(to right, rgba(74, 55, 40, 0.06), transparent);
    pointer-events: none;
    z-index: 100;
}

/* ==========================================================================
   Main Content Grid
   ========================================================================== */

#codex {
    position: relative;
    max-width: 960px;
    margin: 0;
    padding: 0 2rem 0 8vw;
    z-index: 1;
}

.content-grid {
    display: grid;
    grid-template-columns: 60% 40%;
    gap: 0 3rem;
    align-items: start;
}

.main-column {
    padding-right: 1rem;
}

.margin-column {
    position: relative;
    padding-left: 1rem;
}

/* ==========================================================================
   Sections
   ========================================================================== */

.codex-section {
    margin-bottom: 120px;
    position: relative;
}

.codex-section:first-child {
    margin-top: 0;
}

.section-heading {
    position: relative;
    margin-bottom: 2rem;
}

.section-heading h2 {
    font-family: 'Cormorant Garamond', 'Georgia', serif;
    font-weight: 600;
    font-size: clamp(1.3rem, 3vw, 1.8rem);
    letter-spacing: -0.01em;
    line-height: 1.15;
    color: var(--text-walnut);
    visibility: hidden;
}

.section-heading h2.typewriter-active,
.section-heading h2.typewriter-done {
    visibility: visible;
}

/* ==========================================================================
   Drop Caps
   ========================================================================== */

.drop-cap-container {
    float: left;
    margin-right: 0.3em;
    margin-top: 0.1em;
    position: relative;
}

.drop-cap {
    font-family: 'Cormorant Garamond', 'Georgia', serif;
    font-weight: 700;
    font-size: 4.5rem;
    line-height: 0.8;
    color: var(--deep-root);
    display: block;
    position: relative;
}

.drop-cap::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    opacity: 0.06;
    background-color: var(--accent-fern);
    border-radius: 50%;
    z-index: -1;
}

/* ==========================================================================
   Body Text
   ========================================================================== */

.section-body p {
    margin-bottom: 0;
}

.section-body p.indent {
    text-indent: 1.5em;
}

.section-body p + p {
    margin-top: 0;
}

.section-body em {
    font-style: italic;
    color: var(--accent-fern);
}

.section-body strong {
    font-weight: 700;
    color: var(--deep-root);
}

/* ==========================================================================
   Vine Dividers
   ========================================================================== */

.vine-divider {
    margin: 60px 0;
    overflow: visible;
    opacity: 0;
    transition: opacity 600ms var(--ease-natural);
}

.vine-divider.revealed {
    opacity: 1;
}

.vine-divider svg {
    width: 100%;
    height: 20px;
    display: block;
}

.vine-draw .vine-line {
    stroke-dasharray: 1200;
    stroke-dashoffset: 1200;
}

.vine-divider.revealed .vine-draw .vine-line {
    animation: drawVine 2s var(--ease-natural) forwards;
}

.vine-draw .vine-leaf {
    stroke-dasharray: 60;
    stroke-dashoffset: 60;
}

.vine-divider.revealed .vine-draw .vine-leaf {
    animation: drawVine 0.8s var(--ease-natural) forwards;
    animation-delay: 1.2s;
}

@keyframes drawVine {
    to {
        stroke-dashoffset: 0;
    }
}

/* ==========================================================================
   Margin Notes (Scholarly Marginalia)
   ========================================================================== */

.margin-note {
    background-color: var(--margin-bg);
    border-left: 3px solid var(--accent-fern);
    padding: 1rem 1rem 0.8rem;
    margin-bottom: 2rem;
    position: sticky;
    top: 20vh;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 600ms var(--ease-natural), transform 600ms var(--ease-natural);
}

.margin-note.revealed {
    opacity: 1;
    transform: translateY(0);
}

.margin-text {
    font-family: 'EB Garamond', 'Georgia', serif;
    font-weight: 400;
    font-style: italic;
    font-size: 0.778rem;
    line-height: 1.5;
    color: var(--text-sage);
}

.margin-label {
    font-family: 'EB Garamond', 'Georgia', serif;
    font-weight: 400;
    font-size: 0.722rem;
    color: var(--rule-twig);
    display: block;
    margin-top: 0.4rem;
}

.margin-specimen {
    font-family: 'EB Garamond', 'Georgia', serif;
    font-weight: 400;
    font-style: italic;
    font-size: 0.722rem;
    color: var(--accent-fern);
    display: block;
    margin-bottom: 0.3rem;
    letter-spacing: 0.02em;
}

/* ==========================================================================
   Margin Illustrations
   ========================================================================== */

.margin-illustration {
    margin-bottom: 2.5rem;
    padding: 1rem 0;
    opacity: 0;
    transition: opacity 600ms var(--ease-natural);
}

.margin-illustration.revealed {
    opacity: 1;
}

.botanical-illustration {
    width: 100%;
    max-width: 200px;
    height: auto;
    display: block;
    margin: 0 auto;
}

/* SVG Path Draw Animation */
.svg-draw-on-scroll path,
.svg-draw-on-scroll ellipse {
    stroke-dasharray: 500;
    stroke-dashoffset: 500;
}

.svg-draw-on-scroll.drawing path,
.svg-draw-on-scroll.drawing ellipse {
    animation: drawPath 2s var(--ease-natural) forwards;
}

.svg-draw-on-scroll.drawing path:nth-child(2) { animation-delay: 0.1s; }
.svg-draw-on-scroll.drawing path:nth-child(3) { animation-delay: 0.2s; }
.svg-draw-on-scroll.drawing path:nth-child(4) { animation-delay: 0.3s; }
.svg-draw-on-scroll.drawing path:nth-child(5) { animation-delay: 0.4s; }
.svg-draw-on-scroll.drawing path:nth-child(6) { animation-delay: 0.5s; }
.svg-draw-on-scroll.drawing path:nth-child(7) { animation-delay: 0.6s; }
.svg-draw-on-scroll.drawing path:nth-child(8) { animation-delay: 0.7s; }
.svg-draw-on-scroll.drawing path:nth-child(9) { animation-delay: 0.8s; }
.svg-draw-on-scroll.drawing path:nth-child(10) { animation-delay: 0.9s; }
.svg-draw-on-scroll.drawing path:nth-child(11) { animation-delay: 1.0s; }
.svg-draw-on-scroll.drawing path:nth-child(12) { animation-delay: 1.1s; }
.svg-draw-on-scroll.drawing path:nth-child(13) { animation-delay: 1.2s; }
.svg-draw-on-scroll.drawing path:nth-child(14) { animation-delay: 1.3s; }
.svg-draw-on-scroll.drawing path:nth-child(15) { animation-delay: 1.4s; }
.svg-draw-on-scroll.drawing path:nth-child(16) { animation-delay: 1.5s; }
.svg-draw-on-scroll.drawing path:nth-child(17) { animation-delay: 1.6s; }
.svg-draw-on-scroll.drawing path:nth-child(18) { animation-delay: 1.7s; }
.svg-draw-on-scroll.drawing path:nth-child(19) { animation-delay: 1.8s; }
.svg-draw-on-scroll.drawing path:nth-child(20) { animation-delay: 1.9s; }

@keyframes drawPath {
    to {
        stroke-dashoffset: 0;
    }
}

/* ==========================================================================
   Header Fern SVG Draw
   ========================================================================== */

.fern-svg-draw path {
    stroke-dasharray: 600;
    stroke-dashoffset: 600;
}

.fern-svg-draw.drawing path {
    animation: drawPath 3s var(--ease-natural) forwards;
}

.fern-svg-draw.drawing path:nth-child(1) { animation-delay: 0s; }
.fern-svg-draw.drawing path:nth-child(2) { animation-delay: 0.15s; }
.fern-svg-draw.drawing path:nth-child(3) { animation-delay: 0.15s; }
.fern-svg-draw.drawing path:nth-child(4) { animation-delay: 0.3s; }
.fern-svg-draw.drawing path:nth-child(5) { animation-delay: 0.3s; }
.fern-svg-draw.drawing path:nth-child(6) { animation-delay: 0.5s; }
.fern-svg-draw.drawing path:nth-child(7) { animation-delay: 0.5s; }
.fern-svg-draw.drawing path:nth-child(8) { animation-delay: 0.7s; }
.fern-svg-draw.drawing path:nth-child(9) { animation-delay: 0.7s; }
.fern-svg-draw.drawing path:nth-child(10) { animation-delay: 0.9s; }
.fern-svg-draw.drawing path:nth-child(11) { animation-delay: 0.9s; }
.fern-svg-draw.drawing path:nth-child(12) { animation-delay: 1.1s; }
.fern-svg-draw.drawing path:nth-child(13) { animation-delay: 1.1s; }
.fern-svg-draw.drawing path:nth-child(14) { animation-delay: 1.3s; }
.fern-svg-draw.drawing path:nth-child(15) { animation-delay: 1.3s; }
.fern-svg-draw.drawing path:nth-child(16) { animation-delay: 1.5s; }
.fern-svg-draw.drawing path:nth-child(17) { animation-delay: 1.5s; }

/* ==========================================================================
   Footer: Ex Libris
   ========================================================================== */

#site-footer {
    margin-top: 120px;
    padding: 80px 0 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--bg-parchment);
}

.ex-libris {
    text-align: center;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 600ms var(--ease-natural), transform 600ms var(--ease-natural);
}

.ex-libris.revealed {
    opacity: 1;
    transform: translateY(0);
}

.bookplate {
    width: 120px;
    height: auto;
    display: block;
    margin: 0 auto 1rem;
}

.ex-libris-text {
    font-family: 'Cormorant Garamond', 'Georgia', serif;
    font-weight: 600;
    font-size: 1.1rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-sage);
    margin-bottom: 0.3rem;
}

.ex-libris-name {
    font-family: 'EB Garamond', 'Georgia', serif;
    font-weight: 400;
    font-style: italic;
    font-size: 1rem;
    color: var(--accent-fern);
}

.catalogue-number {
    font-family: 'Courier Prime', 'Courier New', monospace;
    font-size: 0.722rem;
    color: var(--rule-twig);
    display: block;
    margin-top: 0.5rem;
    letter-spacing: 0.1em;
}

/* ==========================================================================
   Deep Content Background Shift + Grain
   ========================================================================== */

.codex-section#section-patience,
.codex-section#section-closing {
    position: relative;
}

.codex-section#section-patience::before,
.codex-section#section-closing::before {
    content: '';
    position: absolute;
    top: -60px;
    left: -8vw;
    right: -40vw;
    bottom: -60px;
    background-color: var(--bg-aged);
    z-index: -2;
}

.codex-section#section-patience::after,
.codex-section#section-closing::after {
    content: '';
    position: absolute;
    top: -60px;
    left: -8vw;
    right: -40vw;
    bottom: -60px;
    opacity: 0.02;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='256' height='256' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
    background-size: 256px 256px;
    z-index: -1;
    pointer-events: none;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 768px) {
    html {
        font-size: 16px;
    }

    #site-header {
        padding: 10vh 0 0 6vw;
    }

    #codex {
        padding: 0 1.5rem 0 6vw;
    }

    .content-grid {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .margin-column {
        padding-left: 0;
        margin-top: 2rem;
    }

    .margin-note {
        position: relative;
        top: auto;
    }

    .codex-section {
        margin-bottom: 80px;
    }

    .header-fern-watermark {
        width: 50vw;
        right: -10vw;
    }

    .page-fold-shadow {
        width: 20px;
    }

    .drop-cap {
        font-size: 3.5rem;
    }

    .codex-section#section-patience::before,
    .codex-section#section-closing::before,
    .codex-section#section-patience::after,
    .codex-section#section-closing::after {
        left: -6vw;
        right: -6vw;
    }
}

@media (max-width: 480px) {
    #site-header {
        padding: 8vh 0 0 5vw;
    }

    #codex {
        padding: 0 1rem 0 5vw;
    }

    .drop-cap {
        font-size: 3rem;
    }

    .vine-divider {
        margin: 40px 0;
    }
}