/* ==========================================================================
   아에이오우 KR — bright Hangul-first-steps identity
   Light lavender canvas · violet #7c5cff → sky-blue #8ed3ff
   ========================================================================== */

.service-body--krlearn {
    --kr-bg: #f4f1ff;
    --kr-bg-2: #eaf4ff;
    --kr-ink: #1d1a35;
    --kr-ink-soft: #5b5780;
    --kr-violet: #7c5cff;
    --kr-sky: #2aa9ff;
    --kr-sky-soft: #8ed3ff;
    --kr-card: #ffffff;
    --kr-line: rgba(124, 92, 255, 0.16);
    --kr-shadow: 0 24px 60px -28px rgba(63, 44, 150, 0.45);
    --kr-grad: linear-gradient(120deg, #7c5cff 0%, #8ed3ff 100%);

    background:
        radial-gradient(1100px 620px at 12% -8%, #efe7ff 0%, transparent 60%),
        radial-gradient(900px 560px at 92% 4%, #e2f1ff 0%, transparent 58%),
        var(--kr-bg);
    color: var(--kr-ink);
    font-family: 'Pretendard', 'Space Grotesk', system-ui, sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
}

.service-body--krlearn ::selection {
    background: var(--kr-violet);
    color: #fff;
}

/* floating soft orbs ----------------------------------------------------- */
.kr-orbs {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}
.kr-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(40px);
    opacity: 0.55;
    animation: kr-float 16s ease-in-out infinite;
}
.kr-orb--1 { width: 360px; height: 360px; top: -90px; left: -80px; background: radial-gradient(circle, #c5b6ff, transparent 70%); }
.kr-orb--2 { width: 300px; height: 300px; top: 30%; right: -90px; background: radial-gradient(circle, #aee0ff, transparent 70%); animation-delay: -5s; }
.kr-orb--3 { width: 260px; height: 260px; bottom: -70px; left: 28%; background: radial-gradient(circle, #d7ccff, transparent 70%); animation-delay: -9s; }

@keyframes kr-float {
    0%, 100% { transform: translateY(0) translateX(0); }
    50%      { transform: translateY(-26px) translateX(14px); }
}

/* layout ----------------------------------------------------------------- */
.service-body--krlearn .container {
    width: min(1080px, 92vw);
    margin-inline: auto;
}
.service-main { position: relative; z-index: 1; }

/* back link -------------------------------------------------------------- */
.service-body--krlearn .back-link {
    position: fixed;
    top: 22px;
    left: 22px;
    z-index: 20;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--kr-ink);
    text-decoration: none;
    background: rgba(255, 255, 255, 0.78);
    backdrop-filter: blur(10px);
    border: 1px solid var(--kr-line);
    border-radius: 999px;
    box-shadow: 0 8px 22px -14px rgba(63, 44, 150, 0.5);
    transition: transform 0.2s ease, background 0.2s ease;
}
.service-body--krlearn .back-link:hover {
    transform: translateX(-3px);
    background: #fff;
}

/* badge ------------------------------------------------------------------ */
.kr-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 15px;
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    color: var(--kr-violet);
    background: rgba(124, 92, 255, 0.1);
    border: 1px solid var(--kr-line);
    border-radius: 999px;
    text-transform: uppercase;
}
.kr-badge__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--kr-violet);
    box-shadow: 0 0 0 0 rgba(124, 92, 255, 0.55);
    animation: kr-pulse 2.4s ease-out infinite;
}
@keyframes kr-pulse {
    0%   { box-shadow: 0 0 0 0 rgba(124, 92, 255, 0.5); }
    70%  { box-shadow: 0 0 0 10px rgba(124, 92, 255, 0); }
    100% { box-shadow: 0 0 0 0 rgba(124, 92, 255, 0); }
}

/* hero ------------------------------------------------------------------- */
.kr-hero {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 56px;
    padding-top: 124px;
    padding-bottom: 80px;
}
.kr-title {
    margin: 20px 0 18px;
    font-family: 'Gmarket Sans', 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: clamp(2.4rem, 5.4vw, 3.9rem);
    line-height: 1.08;
    letter-spacing: -0.02em;
}
.kr-title em {
    font-style: normal;
    background: var(--kr-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.kr-lede {
    max-width: 30em;
    font-size: 1.06rem;
    line-height: 1.75;
    color: var(--kr-ink-soft);
}
.kr-hero__cta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}
.kr-hero__note {
    margin-top: 18px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    letter-spacing: 0.02em;
    color: var(--kr-ink-soft);
}

/* buttons ---------------------------------------------------------------- */
.kr-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 13px 26px;
    font-size: 0.95rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 999px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.kr-btn--primary {
    color: #fff;
    background: var(--kr-grad);
    box-shadow: 0 16px 34px -14px rgba(124, 92, 255, 0.7);
}
.kr-btn--primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 22px 42px -14px rgba(124, 92, 255, 0.8);
}
.kr-btn--ghost {
    color: var(--kr-violet);
    background: #fff;
    border: 1px solid var(--kr-line);
}
.kr-btn--ghost:hover {
    transform: translateY(-3px);
    border-color: var(--kr-violet);
}
.kr-btn--lg {
    padding: 16px 34px;
    font-size: 1rem;
}

/* hero visual: writing cell ---------------------------------------------- */
.kr-hero__visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 26px;
}
.kr-cell {
    position: relative;
    width: min(340px, 80vw);
    aspect-ratio: 1;
    background: var(--kr-card);
    border-radius: 28px;
    border: 1px solid var(--kr-line);
    box-shadow: var(--kr-shadow);
    overflow: hidden;
}
.kr-cell__grid {
    position: absolute;
    inset: 26px;
    border: 2px dashed rgba(124, 92, 255, 0.28);
    border-radius: 12px;
}
.kr-cell__guide {
    position: absolute;
    background: rgba(124, 92, 255, 0.18);
}
.kr-cell__guide--v { top: 0; bottom: 0; left: 50%; width: 1.5px; transform: translateX(-50%); }
.kr-cell__guide--h { left: 0; right: 0; top: 50%; height: 1.5px; transform: translateY(-50%); }

.kr-ghost {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    font-family: 'Gmarket Sans', sans-serif;
    font-size: clamp(8rem, 22vw, 11rem);
    line-height: 1;
    color: rgba(124, 92, 255, 0.08);
    user-select: none;
}
.kr-trace {
    position: absolute;
    inset: 18%;
    width: 64%;
    height: 64%;
}
.kr-stroke {
    stroke-dasharray: 260;
    stroke-dashoffset: 260;
    animation: kr-draw 5.4s ease-in-out infinite;
}
.kr-stroke--1 { animation-delay: 0s; }
.kr-stroke--2 { animation-delay: 1.1s; }
.kr-stroke--3 { animation-delay: 1.9s; }
@keyframes kr-draw {
    0%   { stroke-dashoffset: 260; }
    28%  { stroke-dashoffset: 0; }
    78%  { stroke-dashoffset: 0; }
    100% { stroke-dashoffset: 260; }
}
.kr-pen {
    position: absolute;
    right: 22px;
    bottom: 18px;
    font-size: 1.6rem;
    color: var(--kr-violet);
    animation: kr-pen-bob 5.4s ease-in-out infinite;
}
@keyframes kr-pen-bob {
    0%, 100% { transform: translate(0, 0) rotate(-8deg); }
    50%      { transform: translate(-6px, -6px) rotate(2deg); }
}

.kr-build {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 22px;
    background: #fff;
    border: 1px solid var(--kr-line);
    border-radius: 999px;
    box-shadow: 0 10px 28px -18px rgba(63, 44, 150, 0.5);
    font-family: 'Gmarket Sans', sans-serif;
}
.kr-build__part { font-size: 1.5rem; color: var(--kr-violet); }
.kr-build__op { font-size: 1.1rem; color: var(--kr-ink-soft); }
.kr-build__result {
    font-size: 1.7rem;
    background: var(--kr-grad);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
}

/* vowel marquee ---------------------------------------------------------- */
.kr-vowels {
    width: 100% !important;
    margin: 0 0 12px !important;
    padding: 18px 0;
    overflow: hidden;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}
.kr-vowels__row {
    display: flex;
    gap: 38px;
    width: max-content;
    animation: kr-marquee 26s linear infinite;
    font-family: 'Gmarket Sans', sans-serif;
    font-size: 2rem;
    color: rgba(124, 92, 255, 0.32);
}
@keyframes kr-marquee {
    from { transform: translateX(0); }
    to   { transform: translateX(-50%); }
}

/* shared section heads --------------------------------------------------- */
.kr-eyebrow {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.74rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--kr-sky);
}
.kr-section-title {
    margin: 12px 0 36px;
    font-family: 'Gmarket Sans', 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: clamp(1.6rem, 3.6vw, 2.3rem);
    letter-spacing: -0.01em;
}

/* how --------------------------------------------------------------------- */
.kr-how { padding: 56px 0; }
.kr-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}
.kr-step {
    position: relative;
    padding: 30px 26px;
    background: var(--kr-card);
    border: 1px solid var(--kr-line);
    border-radius: 22px;
    box-shadow: var(--kr-shadow);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.kr-step:hover {
    transform: translateY(-6px);
    box-shadow: 0 30px 64px -28px rgba(63, 44, 150, 0.55);
}
.kr-step__num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--kr-sky);
}
.kr-step__icon {
    display: block;
    margin: 10px 0 14px;
    font-size: 1.9rem;
}
.kr-step h3 {
    margin: 0 0 8px;
    font-size: 1.12rem;
    font-weight: 700;
}
.kr-step p {
    margin: 0;
    font-size: 0.94rem;
    line-height: 1.65;
    color: var(--kr-ink-soft);
}

/* features ---------------------------------------------------------------- */
.kr-features { padding: 56px 0; }
.kr-feature-grid {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
}
.kr-feature {
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
    column-gap: 18px;
    align-items: center;
    padding: 24px 26px;
    background: var(--kr-card);
    border: 1px solid var(--kr-line);
    border-radius: 20px;
    box-shadow: 0 16px 40px -28px rgba(63, 44, 150, 0.45);
    transition: transform 0.25s ease;
}
.kr-feature:hover { transform: translateY(-4px); }
.kr-feature__mark {
    grid-row: 1 / 3;
    display: grid;
    place-items: center;
    width: 56px;
    height: 56px;
    border-radius: 16px;
    font-family: 'Gmarket Sans', serif;
    font-size: 1.7rem;
    color: #fff;
    background: var(--kr-grad);
    box-shadow: 0 10px 22px -10px rgba(124, 92, 255, 0.6);
}
.kr-feature__mark--soon {
    background: linear-gradient(120deg, #b9a9ff, #b8e1ff);
}
.kr-feature h3 {
    align-self: end;
    margin: 0;
    font-size: 1.05rem;
    font-weight: 700;
}
.kr-feature p {
    align-self: start;
    margin: 4px 0 0;
    font-size: 0.9rem;
    line-height: 1.55;
    color: var(--kr-ink-soft);
}
.kr-soon-tag {
    font-size: 0.66rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--kr-violet);
    background: rgba(124, 92, 255, 0.12);
    border-radius: 6px;
    padding: 2px 7px;
    vertical-align: middle;
}

/* notify ------------------------------------------------------------------ */
.kr-notify { padding: 40px 0 96px; }
.kr-notify__card {
    position: relative;
    overflow: hidden;
    text-align: center;
    padding: 56px 32px;
    border-radius: 30px;
    background: var(--kr-grad);
    color: #fff;
    box-shadow: 0 40px 80px -36px rgba(124, 92, 255, 0.75);
}
.kr-notify__glyph {
    position: absolute;
    right: -16px;
    bottom: -48px;
    font-family: 'Gmarket Sans', sans-serif;
    font-size: 16rem;
    line-height: 1;
    color: rgba(255, 255, 255, 0.12);
    user-select: none;
    pointer-events: none;
}
.kr-notify__card h2 {
    position: relative;
    margin: 0 0 12px;
    font-family: 'Gmarket Sans', 'Space Grotesk', sans-serif;
    font-size: clamp(1.5rem, 3.4vw, 2.1rem);
    font-weight: 700;
}
.kr-notify__card p {
    position: relative;
    max-width: 34em;
    margin: 0 auto 26px;
    font-size: 1rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.9);
}
.kr-notify__card .kr-btn--primary {
    position: relative;
    color: var(--kr-violet);
    background: #fff;
    box-shadow: 0 18px 38px -16px rgba(0, 0, 0, 0.35);
}
.kr-notify__card .kr-btn--primary:hover { transform: translateY(-3px); }
.kr-notify__hint {
    position: relative;
    display: block;
    margin-top: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.76rem;
    color: rgba(255, 255, 255, 0.78);
}

/* footer ------------------------------------------------------------------ */
.service-body--krlearn .service-footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--kr-line);
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(8px);
}
.service-body--krlearn .service-footer__inner {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    justify-content: space-between;
    padding: 26px 0;
    font-size: 0.86rem;
    color: var(--kr-ink-soft);
}
.service-body--krlearn .footer-link {
    color: var(--kr-violet);
    font-weight: 600;
    text-decoration: none;
}
.service-body--krlearn .footer-link:hover { text-decoration: underline; }

/* reveal ------------------------------------------------------------------ */
.service-body--krlearn [data-animate] {
    opacity: 0;
    transform: translateY(26px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.service-body--krlearn [data-animate].is-visible {
    opacity: 1;
    transform: none;
}

/* responsive -------------------------------------------------------------- */
@media (max-width: 900px) {
    .kr-hero {
        grid-template-columns: 1fr;
        gap: 40px;
        padding-top: 108px;
        text-align: center;
    }
    .kr-hero__copy { display: flex; flex-direction: column; align-items: center; }
    .kr-hero__cta { justify-content: center; }
    .kr-steps { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
    .kr-feature-grid { grid-template-columns: 1fr; }
    .kr-vowels__row { font-size: 1.6rem; gap: 26px; }
    .kr-notify__card { padding: 44px 22px; }
    .kr-notify__glyph { font-size: 11rem; }
    .service-body--krlearn .back-link { top: 14px; left: 14px; padding: 8px 13px; font-size: 0.78rem; }
}

@media (prefers-reduced-motion: reduce) {
    .kr-orb, .kr-stroke, .kr-pen, .kr-vowels__row, .kr-badge__dot { animation: none !important; }
    .kr-stroke { stroke-dashoffset: 0; }
    .service-body--krlearn [data-animate] { opacity: 1; transform: none; transition: none; }
}