/* ggaji.com — 까지
   Japanese-minimal × hand-drawn warmth.
   Single-column, ma-negative-space, monochrome with selective accents. */

:root {
    --paper-white: #fafaf7;
    --brush-black: #1a1a1a;
    --marker-red: #e53935;
    --pencil-blue: #1e88e5;
    --margin-gray: #9e9e9e;
    --notebook-rule: #e0e0e0;
    --limit-orange: #ff6d00;

    --content-width: 680px;
    --gutter: clamp(1.25rem, 5vw, 3rem);
    --section-gap: clamp(120px, 18vw, 160px);

    --serif: "Noto Serif KR", "Noto Serif", Georgia, serif;
    --sans: "Noto Sans KR", "Inter", system-ui, -apple-system, sans-serif;
    --hand: "Caveat", "Inter", cursive;
}

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

html, body {
    background: var(--paper-white);
    color: var(--brush-black);
    font-family: var(--sans);
    font-weight: 400;
    line-height: 1.85;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    overflow-x: hidden;
    min-height: 100vh;
}

.page {
    width: 100%;
    max-width: 100%;
    display: block;
}

/* ----------------------------------------------------------------
   Common section frame
---------------------------------------------------------------- */

section,
footer.end {
    width: 100%;
    max-width: var(--content-width);
    margin: 0 auto;
    padding-left: var(--gutter);
    padding-right: var(--gutter);
    position: relative;
}

.meanings,
.notebook,
.progress-range {
    margin-top: var(--section-gap);
}

.section-head {
    margin-bottom: 56px;
    position: relative;
}

.section-eyebrow {
    display: inline-block;
    font-family: var(--hand);
    font-size: 1.1rem;
    color: var(--margin-gray);
    margin-bottom: 8px;
    letter-spacing: 0.02em;
}

.section-title {
    font-family: var(--serif);
    font-weight: 700;
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    line-height: 1.2;
    color: var(--brush-black);
    margin-bottom: 24px;
}

.section-title em {
    font-style: normal;
    color: var(--marker-red);
    font-family: var(--serif);
    font-weight: 900;
}

/* ----------------------------------------------------------------
   Limit marker (line + dot)
---------------------------------------------------------------- */

.limit-marker {
    display: flex;
    align-items: center;
    gap: 0;
    width: 80px;
    height: 12px;
}

.marker-line {
    flex: 1;
    height: 1px;
    background: var(--brush-black);
    transform-origin: left center;
    transform: scaleX(1);
}

.marker-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--brush-black);
    margin-left: 0;
    flex-shrink: 0;
    transform: scale(1);
}

/* hero variant: drawn-in animation */
.hero-marker {
    width: 220px;
    margin: 32px auto 0;
    opacity: 0;
}
.hero-marker .marker-line {
    transform: scaleX(0);
    transition: transform 320ms cubic-bezier(0.6, 0, 0.4, 1);
}
.hero-marker .marker-dot {
    background: var(--limit-orange);
    width: 8px;
    height: 8px;
    transform: scale(0);
    transition: transform 220ms cubic-bezier(0.34, 1.56, 0.64, 1) 280ms;
}
.hero-marker.is-drawn { opacity: 1; }
.hero-marker.is-drawn .marker-line { transform: scaleX(1); }
.hero-marker.is-drawn .marker-dot { transform: scale(1); }

/* ----------------------------------------------------------------
   까지 highlight system
---------------------------------------------------------------- */

.kkaji,
.kkaji-inline {
    background-image: linear-gradient(to top, rgba(229, 57, 53, 0.22) 40%, transparent 40%);
    background-repeat: no-repeat;
    background-position: left bottom;
    background-size: 0% 100%;
    padding: 0 0.06em;
    transition: background-size 420ms cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--marker-red);
    font-weight: 700;
}

.is-highlighted .kkaji,
.is-highlighted .kkaji-inline,
.kkaji.is-lit,
.kkaji-inline.is-lit {
    background-size: 100% 100%;
}

.kkaji-loud {
    color: var(--marker-red);
    font-family: var(--serif);
    font-weight: 900;
}

/* ----------------------------------------------------------------
   HERO
---------------------------------------------------------------- */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 8vh;
    padding-bottom: 8vh;
}

.hero-inner {
    text-align: center;
    position: relative;
    width: 100%;
}

.hero-character {
    font-family: var(--serif);
    font-weight: 900;
    font-size: clamp(6rem, 18vw, 14rem);
    line-height: 0.95;
    letter-spacing: -0.02em;
    color: var(--brush-black);
    display: block;
    text-align: center;
}

.brush-reveal {
    display: inline-block;
    clip-path: inset(0 100% 0 0);
    will-change: clip-path;
    transition: clip-path 800ms cubic-bezier(0.65, 0, 0.35, 1);
}

.brush-reveal.is-painted {
    clip-path: inset(0 0 0 0);
}

.hero-gloss {
    font-family: var(--hand);
    font-size: clamp(0.95rem, 1.4vw, 1.1rem);
    color: var(--brush-black);
    opacity: 0;
    margin-top: 18px;
    letter-spacing: 0.04em;
    transition: opacity 400ms ease 1100ms;
}
.hero-gloss.is-shown {
    opacity: 0.6;
}

/* hero annotation */
.hero-annotation {
    position: absolute;
    right: -8px;
    top: 8%;
    transform: rotate(-6deg);
    text-align: left;
    color: var(--margin-gray);
    opacity: 0;
    transition: opacity 500ms ease 1300ms;
}
.hero-annotation.is-shown { opacity: 0.7; }

.annotation .annotation-text {
    font-family: var(--hand);
    font-size: 1.05rem;
    line-height: 1.3;
    color: var(--margin-gray);
    display: inline-block;
}

.annotation .annotation-arrow,
.annotation .annotation-bracket,
.annotation .annotation-circle,
.annotation .annotation-underline {
    display: block;
    margin-top: 4px;
}

.annotation svg path {
    stroke-dasharray: 400;
    stroke-dashoffset: 400;
    transition: stroke-dashoffset 900ms cubic-bezier(0.65, 0, 0.35, 1);
}
.annotation.is-sketched svg path {
    stroke-dashoffset: 0;
}

/* scroll cue */
.scroll-cue {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--margin-gray);
    font-family: var(--hand);
    font-size: 0.95rem;
    opacity: 0;
    animation: cue-fade 600ms ease 1800ms forwards;
}

.scroll-cue-line {
    display: block;
    width: 1px;
    height: 28px;
    margin: 8px auto 0;
    background: var(--margin-gray);
    transform-origin: top;
    animation: cue-pulse 2s ease-in-out infinite 2400ms;
}

@keyframes cue-fade {
    to { opacity: 0.7; }
}
@keyframes cue-pulse {
    0%, 100% { transform: scaleY(0.4); opacity: 0.4; }
    50% { transform: scaleY(1); opacity: 1; }
}

/* ----------------------------------------------------------------
   MEANING CARDS
---------------------------------------------------------------- */

.meaning-card {
    margin-top: 64px;
    position: relative;
    padding-top: 12px;
}

.meaning-card:first-of-type {
    margin-top: 0;
}

.card-number {
    font-family: var(--hand);
    font-size: 1.1rem;
    color: var(--margin-gray);
    margin-bottom: 6px;
}

.card-heading {
    font-family: var(--serif);
    font-weight: 700;
    font-size: clamp(1.35rem, 2.4vw, 1.75rem);
    color: var(--brush-black);
    line-height: 1.25;
    margin-bottom: 18px;
}

.card-heading-en {
    font-family: var(--hand);
    font-weight: 400;
    font-size: 0.9em;
    color: var(--margin-gray);
    margin-left: 10px;
    font-style: normal;
}

.card-body {
    font-family: var(--serif);
    font-weight: 400;
    font-size: clamp(1.15rem, 1.6vw, 1.4rem);
    line-height: 1.7;
    color: var(--brush-black);
    margin-bottom: 16px;
}

.card-body .kr {
    font-family: var(--sans);
    font-weight: 700;
}

.en-handwritten {
    font-family: var(--hand);
    font-size: 1.05em;
    color: var(--margin-gray);
}

.card-meaning {
    font-family: var(--sans);
    font-size: clamp(1rem, 1.2vw, 1.05rem);
    line-height: 1.85;
    color: var(--brush-black);
    max-width: 56ch;
}

.card-meaning .kkaji-inline {
    font-family: var(--sans);
}

/* card annotations: in margin (right) on wide, below on narrow */
.card-annotation {
    position: absolute;
    right: -120px;
    top: 32px;
    width: 110px;
    text-align: left;
    color: var(--margin-gray);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 500ms ease, transform 500ms ease;
}
.meaning-card.is-revealed .card-annotation {
    opacity: 0.75;
    transform: translateY(0);
    transition-delay: 450ms;
}

/* ----------------------------------------------------------------
   NOTEBOOK
---------------------------------------------------------------- */

.notebook-page {
    position: relative;
    padding: 56px 0 40px;
}

.notebook-rules {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image: repeating-linear-gradient(
        to bottom,
        transparent 0,
        transparent 27px,
        var(--notebook-rule) 27px,
        var(--notebook-rule) 28px
    );
    opacity: 0;
    transition: opacity 400ms ease;
}

.notebook.is-revealed .notebook-rules {
    opacity: 0.45;
}

.notebook-entries {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 56px;
}

.entry {
    position: relative;
}

.entry-kr {
    font-family: var(--serif);
    font-weight: 700;
    font-size: clamp(1.15rem, 1.8vw, 1.4rem);
    line-height: 28px;
    color: var(--brush-black);
    margin: 0;
}

.entry-kr .kr {
    font-family: var(--sans);
    font-weight: 700;
}

.entry-en {
    font-family: var(--hand);
    font-size: 1.15rem;
    line-height: 28px;
    color: var(--margin-gray);
    margin-top: 0;
}

.entry-en em {
    font-style: italic;
    color: var(--pencil-blue);
}

.notebook-annotation {
    position: absolute;
    right: -150px;
    top: 80px;
    width: 130px;
    color: var(--margin-gray);
    text-align: left;
    opacity: 0;
    transform: rotate(4deg);
    transition: opacity 500ms ease 600ms;
}
.notebook-annotation .annotation-text em {
    color: var(--marker-red);
    font-style: normal;
    font-weight: 700;
}
.notebook.is-revealed .notebook-annotation { opacity: 0.75; }

/* ----------------------------------------------------------------
   PROGRESS RANGE
---------------------------------------------------------------- */

.range-wrap {
    position: relative;
}

.range-instruction {
    font-family: var(--hand);
    font-size: 1.1rem;
    color: var(--margin-gray);
    margin-bottom: 64px;
    text-align: left;
}

.range-stage {
    position: relative;
    padding: 80px 0 40px;
}

.range-track {
    position: relative;
    height: 80px;
    width: 100%;
}

.range-line {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--brush-black);
    transform: translateY(-50%);
}

.range-fill {
    position: absolute;
    top: 50%;
    left: 0;
    height: 2px;
    width: 0%;
    background: var(--limit-orange);
    transform: translateY(-50%);
    transition: width 80ms linear;
}

.range-endpoint {
    position: absolute;
    top: 50%;
    left: 0%;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--limit-orange);
    transform: translate(-50%, -50%);
    cursor: grab;
    transition: width 180ms ease, height 180ms ease, background 180ms ease;
    z-index: 4;
}
.range-endpoint:hover,
.range-endpoint.is-active {
    width: 20px;
    height: 20px;
    cursor: grabbing;
}
.range-endpoint.is-bouncing {
    animation: endpoint-bounce 220ms ease-out;
}
@keyframes endpoint-bounce {
    0% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.35); }
    100% { transform: translate(-50%, -50%) scale(1); }
}

.range-tick {
    position: absolute;
    top: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 2;
}
.range-tick[data-position="0"]   { left: 0%; }
.range-tick[data-position="25"]  { left: 25%; }
.range-tick[data-position="50"]  { left: 50%; }
.range-tick[data-position="75"]  { left: 75%; }
.range-tick[data-position="100"] { left: 100%; }

.tick-mark {
    display: block;
    width: 1px;
    height: 14px;
    background: var(--brush-black);
    margin: 0 auto;
    opacity: 0.5;
}

.tick-label {
    position: absolute;
    bottom: calc(100% + 14px);
    left: 50%;
    transform: translateX(-50%) translateY(6px);
    white-space: nowrap;
    font-family: var(--sans);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--brush-black);
    opacity: 0;
    transition: opacity 320ms ease, transform 320ms ease;
}

.tick-label em {
    font-family: var(--hand);
    font-style: normal;
    font-weight: 400;
    font-size: 0.95em;
    color: var(--margin-gray);
    margin-left: 6px;
}

.range-tick[data-position="0"] .tick-label,
.tick-label.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.range-tick[data-position="100"] .tick-label {
    transform: translateX(-50%) translateY(6px);
}
.range-tick[data-position="100"] .tick-label.is-visible {
    transform: translateX(-50%) translateY(0);
}

.range-readout {
    margin-top: 64px;
    font-family: var(--serif);
    font-weight: 400;
    font-size: clamp(1.1rem, 1.6vw, 1.35rem);
    color: var(--brush-black);
    text-align: center;
}
.range-readout em {
    font-family: var(--hand);
    font-size: 0.95em;
    color: var(--margin-gray);
    font-style: normal;
}
.range-readout .kkaji-inline {
    background-size: 100% 100%;
}

.range-annotation {
    position: absolute;
    right: -120px;
    top: 0;
    width: 110px;
    color: var(--margin-gray);
    opacity: 0;
    transform: rotate(-3deg);
    transition: opacity 500ms ease 400ms;
}
.progress-range.is-revealed .range-annotation { opacity: 0.7; }

/* ----------------------------------------------------------------
   END / FOOTER
---------------------------------------------------------------- */

.end {
    margin-top: var(--section-gap);
    padding-top: 80px;
    padding-bottom: 80px;
    text-align: center;
}

.end-character {
    font-family: var(--serif);
    font-weight: 900;
    font-size: clamp(3rem, 6vw, 5rem);
    color: var(--brush-black);
    line-height: 1;
    margin-bottom: 32px;
}
.end-period {
    color: var(--marker-red);
}

.end-marker {
    display: flex;
    align-items: center;
    gap: 0;
    width: 100%;
    max-width: 320px;
    margin: 0 auto 28px;
}
.end-line {
    flex: 1;
    height: 1px;
    background: var(--brush-black);
}
.end-arrow {
    flex-shrink: 0;
    display: block;
}

.end-credit {
    font-family: var(--sans);
    font-size: 0.95rem;
    color: var(--margin-gray);
}
.end-credit .en-handwritten {
    color: var(--margin-gray);
}

/* ----------------------------------------------------------------
   Reveal-on-scroll base state
---------------------------------------------------------------- */

.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 600ms ease, transform 600ms ease;
}
.reveal.is-revealed {
    opacity: 1;
    transform: translateY(0);
}

.meaning-card.reveal {
    opacity: 0;
    transform: translateY(20px);
}

/* ----------------------------------------------------------------
   Responsive: collapse margin annotations under 980px
---------------------------------------------------------------- */

@media (max-width: 980px) {
    .hero-annotation {
        position: static;
        margin: 32px auto 0;
        transform: none;
        max-width: 280px;
    }
    .hero-annotation .annotation-arrow {
        margin: 4px auto 0;
    }
    .card-annotation,
    .notebook-annotation,
    .range-annotation {
        position: static;
        width: auto;
        margin-top: 16px;
        transform: none;
    }
    .card-annotation .annotation-bracket,
    .card-annotation .annotation-circle,
    .card-annotation .annotation-underline {
        display: none;
    }
}

@media (max-width: 560px) {
    :root {
        --section-gap: 100px;
    }
    .hero {
        min-height: 90vh;
    }
    .section-head {
        margin-bottom: 40px;
    }
    .meaning-card {
        margin-top: 48px;
    }
    .notebook-entries {
        gap: 48px;
    }
    .range-stage {
        padding: 100px 0 40px;
    }
    .tick-label {
        font-size: 0.85rem;
    }
}