/* ==========================================================================
   가능성.com — Possibility Unfolds
   Design: organic-flow / immersive-scroll / botanical illustration garden
   ========================================================================== */

/* ---- Palette tokens ----
   Petal White:   #FAFAF8
   Root Dark:     #2A3428
   Stem Green:    #3A4A38
   Leaf Mid:      #6B8A5A
   Canopy Light:  #C8D8B8
   Blossom Pink:  #D4A0A0
   Pollen Gold:   #D4B870
   Fruit Orange:  #D48A4A
   Sky Breath:    #E8F0F0
*/

:root {
    --petal-white: #FAFAF8;
    --root-dark: #2A3428;
    --stem-green: #3A4A38;
    --leaf-mid: #6B8A5A;
    --canopy-light: #C8D8B8;
    --blossom-pink: #D4A0A0;
    --pollen-gold: #D4B870;
    --fruit-orange: #D48A4A;
    --sky-breath: #E8F0F0;

    --font-display: "Gowun Batang", "Noto Serif KR", serif;
    --font-body: "Noto Sans KR", "Pretendard", system-ui, sans-serif;
    --font-label: "Gowun Dodum", "Noto Sans KR", sans-serif;
    --font-seed: "Noto Serif KR", "Gowun Batang", serif;

    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-grow:   cubic-bezier(0.22, 1, 0.36, 1);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--petal-white);
    color: var(--stem-green);
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.75;
    overflow-x: hidden;
}

/* ==========================================================================
   Seed circle (fixed, scales with scroll, morphs to trunk)
   ========================================================================== */
.seed-circle {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--blossom-pink);
    transform: translate(-50%, -50%) scale(1);
    transform-origin: 50% 50%;
    z-index: 10;
    will-change: transform, border-radius, background, width, height;
    transition: background 800ms var(--ease-grow);
    display: flex;
    align-items: center;
    justify-content: center;
}

.seed-character {
    font-family: var(--font-seed);
    font-weight: 900;
    font-size: 0;
    color: var(--petal-white);
    line-height: 1;
    opacity: 0;
    transition: font-size 600ms var(--ease-grow), opacity 600ms var(--ease-grow);
    user-select: none;
    pointer-events: none;
}

/* As the circle gets large enough, the 가 character fades up */
.seed-circle.has-character .seed-character {
    font-size: 64px;
    opacity: 1;
}

/* When the seed becomes the trunk: morphs from circle to a tall thin rectangle */
.seed-circle.is-trunk {
    border-radius: 4px;
    background: var(--leaf-mid);
}

.seed-circle.is-trunk .seed-character {
    opacity: 0;
}

/* When the seed retreats (later sections), it becomes invisible */
.seed-circle.is-hidden {
    opacity: 0;
    transition: opacity 600ms var(--ease-grow);
}

/* ==========================================================================
   Branch SVG — full-viewport background, fixed
   ========================================================================== */
.branch-svg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 2;
    opacity: 0;
    transition: opacity 1000ms var(--ease-grow);
}

.branch-svg.is-visible {
    opacity: 1;
}

.branch-path {
    stroke-dasharray: 2000;
    stroke-dashoffset: 2000;
    transition: stroke-dashoffset 800ms var(--ease-grow);
}

.branch-path.is-drawn {
    stroke-dashoffset: 0;
}

.leaf-node {
    transform-origin: center;
    transform-box: fill-box;
    opacity: 0;
    transition: opacity 360ms var(--ease-spring), transform 360ms var(--ease-spring);
}

.leaf-node.is-bloomed {
    opacity: 1;
}

/* ==========================================================================
   Pollen drift — fixed full-viewport particle layer
   ========================================================================== */
.pollen-field {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 3;
    opacity: 0;
    transition: opacity 1200ms var(--ease-grow);
}

.pollen-field.is-active {
    opacity: 1;
}

.pollen-particle {
    position: absolute;
    border-radius: 50%;
    background: var(--pollen-gold);
    will-change: transform, opacity;
}

@keyframes pollen-drift {
    0% {
        transform: translate3d(0, 0, 0);
        opacity: 0;
    }
    8% {
        opacity: var(--pollen-opacity, 0.22);
    }
    92% {
        opacity: var(--pollen-opacity, 0.22);
    }
    100% {
        transform: translate3d(var(--pollen-drift-x, 0px), -110vh, 0);
        opacity: 0;
    }
}

/* ==========================================================================
   Main flow
   ========================================================================== */
.main-flow {
    position: relative;
    z-index: 5;
    width: 100%;
}

.section {
    position: relative;
    width: 100%;
    padding: 0 6vw;
}

.section-seed   { height: 100vh; }
.section-sprout { min-height: 100vh; padding-top: 14vh; padding-bottom: 14vh; }
.section-bloom  { min-height: 120vh; padding-top: 14vh; padding-bottom: 14vh; }
.section-canopy { min-height: 120vh; padding-top: 12vh; padding-bottom: 12vh; }
.section-fruit  { min-height: 100vh; padding-top: 16vh; padding-bottom: 16vh; }

/* ==========================================================================
   Typography helpers
   ========================================================================== */
.section-title {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--root-dark);
    font-size: 44px;
    line-height: 1.1;
    margin: 0 0 0.4em 0;
    letter-spacing: -0.01em;
}

.section-title-large {
    font-size: 64px;
}

.section-subtitle {
    font-family: var(--font-label);
    font-weight: 400;
    font-size: 14px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--leaf-mid);
    margin: 0 0 1.6em 0;
}

.branch-label {
    font-family: var(--font-label);
    font-weight: 400;
    font-size: 13px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--leaf-mid);
    margin: 0 0 1.2em 0;
    opacity: 0.85;
}

.prose {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: 17px;
    line-height: 1.78;
    color: var(--stem-green);
    margin: 0 0 1.2em 0;
    max-width: 38ch;
}

.prose em {
    font-style: italic;
    color: var(--root-dark);
}

/* ==========================================================================
   SECTION 1 — SEED
   ========================================================================== */
.section-seed {
    display: flex;
    align-items: center;
    justify-content: center;
}

.seed-anchor {
    position: absolute;
    bottom: 8vh;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    opacity: 0.55;
}

.seed-whisper {
    font-family: var(--font-display);
    font-size: 18px;
    color: var(--root-dark);
    margin: 0;
    letter-spacing: 0.04em;
}

.seed-whisper-en {
    font-family: var(--font-label);
    font-size: 12px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--leaf-mid);
    margin: 0.6em 0 0 0;
}

/* ==========================================================================
   SECTION 2 — SPROUT
   ========================================================================== */
.sprout-grid {
    display: grid;
    grid-template-columns: 1fr 80px 1fr;
    column-gap: 20px;
    max-width: 1200px;
    margin: 0 auto;
    align-items: start;
}

.sprout-column {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 800ms var(--ease-grow), transform 800ms var(--ease-grow);
}

.sprout-column-left {
    transform: translate(-22px, 28px);
    text-align: right;
}

.sprout-column-left .prose {
    margin-left: auto;
}

.sprout-column-right {
    transform: translate(22px, 28px);
}

.section-sprout.is-revealed .sprout-column,
.section-sprout.is-revealed .sprout-column-left,
.section-sprout.is-revealed .sprout-column-right {
    opacity: 1;
    transform: translate(0, 0);
}

.sprout-spine {
    width: 2px;
    height: 60vh;
    background: linear-gradient(to bottom,
        rgba(107, 138, 90, 0.0) 0%,
        rgba(107, 138, 90, 0.45) 12%,
        rgba(107, 138, 90, 0.45) 88%,
        rgba(107, 138, 90, 0.0) 100%);
    margin: 0 auto;
    align-self: stretch;
    justify-self: center;
    transform-origin: top center;
    transform: scaleY(0);
    transition: transform 1100ms var(--ease-grow);
}

.section-sprout.is-revealed .sprout-spine {
    transform: scaleY(1);
}

/* ==========================================================================
   SECTION 3 — BLOOM
   ========================================================================== */
.bloom-header {
    text-align: center;
    margin-bottom: 6vh;
}

.bloom-header .branch-label {
    margin-bottom: 0.6em;
}

.bloom-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 56px;
    max-width: 1280px;
    margin: 0 auto;
}

.bloom-cell {
    position: relative;
    padding: 24px 20px 28px 20px;
    background: rgba(232, 240, 240, 0.38);
    border-radius: 18px 22px 14px 26px;
    opacity: 0;
    transform: translateY(36px) scale(0.97);
    transition: opacity 760ms var(--ease-grow), transform 760ms var(--ease-spring);
}

.bloom-cell.is-revealed {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.bloom-cell-marker {
    width: 44px;
    height: 44px;
    margin-bottom: 14px;
}

.bloom-cell-svg {
    width: 100%;
    height: 100%;
    display: block;
}

.bloom-title {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--root-dark);
    font-size: 24px;
    margin: 0 0 0.6em 0;
    letter-spacing: -0.005em;
}

.bloom-cell-1 { transform-origin: top left; }
.bloom-cell-2 { transform-origin: top center; }
.bloom-cell-3 { transform-origin: top right; }

/* Slight organic offset on bloom cells */
.bloom-cell-1 { margin-top: 8px; }
.bloom-cell-2 { margin-top: 0; }
.bloom-cell-3 { margin-top: 16px; }

/* ==========================================================================
   SECTION 4 — CANOPY (organic positioning)
   ========================================================================== */
.canopy-frame {
    position: relative;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    height: 96vh;
}

.canopy-block {
    position: absolute;
    left: var(--x);
    top: var(--y);
    width: 30%;
    max-width: 360px;
    transform: rotate(var(--rotation)) translateY(28px);
    opacity: 0;
    transition: opacity 900ms var(--ease-grow), transform 900ms var(--ease-spring);
    transform-origin: 30% 50%;
}

.canopy-block.is-revealed {
    opacity: 1;
    transform: rotate(var(--rotation)) translateY(0);
}

.canopy-block .branch-label {
    margin-bottom: 0.5em;
    color: var(--fruit-orange);
}

.canopy-prose {
    font-size: 16px;
    line-height: 1.72;
    color: var(--stem-green);
    background: rgba(250, 250, 248, 0.78);
    padding: 14px 16px;
    border-radius: 10px 14px 8px 16px;
    backdrop-filter: blur(2px);
    border-left: 2px solid rgba(107, 138, 90, 0.35);
}

/* ==========================================================================
   SECTION 5 — FRUIT
   ========================================================================== */
.section-fruit {
    display: flex;
    align-items: center;
    justify-content: center;
}

.fruit-anchor {
    text-align: center;
    max-width: 560px;
    opacity: 0;
    transform: scale(0.92);
    transition: opacity 1100ms var(--ease-grow), transform 1100ms var(--ease-spring);
}

.section-fruit.is-revealed .fruit-anchor {
    opacity: 1;
    transform: scale(1);
}

.fruit-mark {
    width: 96px;
    height: 96px;
    margin: 0 auto 1.8em auto;
}

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

.fruit-label {
    color: var(--fruit-orange);
}

.fruit-prose {
    margin: 0 auto 1.6em auto;
    max-width: 44ch;
    text-align: center;
    font-size: 18px;
    line-height: 1.85;
}

.fruit-signature {
    font-family: var(--font-display);
    font-weight: 400;
    font-style: italic;
    color: var(--leaf-mid);
    font-size: 15px;
    letter-spacing: 0.06em;
    margin: 0;
}

/* ==========================================================================
   Responsive — mobile (< 768px)
   ========================================================================== */
@media (max-width: 768px) {
    .section-title { font-size: 34px; }
    .section-title-large { font-size: 44px; }

    .sprout-grid {
        grid-template-columns: 1fr;
        row-gap: 36px;
    }

    .sprout-spine {
        display: none;
    }

    .sprout-column-left,
    .sprout-column-right {
        text-align: left;
    }

    .sprout-column-left .prose {
        margin-left: 0;
    }

    .bloom-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .bloom-cell-1, .bloom-cell-2, .bloom-cell-3 {
        margin-top: 0;
    }

    /* Canopy: drop absolute positioning to a single column */
    .canopy-frame {
        height: auto;
        display: flex;
        flex-direction: column;
        gap: 28px;
    }

    .canopy-block {
        position: static;
        width: 100%;
        max-width: 100%;
        transform: none !important;
        opacity: 1;
    }

    .canopy-block.is-revealed {
        transform: none;
    }

    .branch-svg {
        opacity: 0.55;
    }

    .seed-circle {
        z-index: 4;
    }
}

@media (prefers-reduced-motion: reduce) {
    .branch-path {
        stroke-dashoffset: 0;
        transition: none;
    }
    .leaf-node {
        opacity: 1;
        transition: none;
    }
    .pollen-particle {
        animation: none !important;
    }
    .seed-circle {
        transition: none;
    }
}