/* 떼드영 herbtea.korbouteaque.com — 공통 스타일시트
   디자인 방향: PREMIUM HERBAL TEA COMMERCE — 실제 찻물/원물의 색에서 가져온 팔레트.
   포셀린(도자기 백색) + 카본(잉크 블랙) + 티 앰버 + 프레시 시트론 + 퍼시먼.
   세이지/버건디/앤티크 베이지 같은 클리셰, 명조체 사용 금지. */
:root {
    --dark: #151515;
    --base: #F7F6F2;
    --surface: #EFEDE6;
    --text: #1B1B1B;
    --muted: #7A7A72;
    --line: #E4E1D8;
    --accent: #C9783D;
    --accent-soft: #DDA06A;
    --citron: #D6DE72;
    --persimmon: #E66342;
    --scene-y: 90px;
    --scene-dur: 1s;
    --font-sans: "Pretendard Variable", Pretendard, -apple-system, sans-serif;
    --font-en: "Instrument Sans", -apple-system, sans-serif;
    --container: 1200px;
    --space-section: 7rem;
    --space-section-sm: 5rem;
    --ease: cubic-bezier(0.25, 1, 0.5, 1);
    --fs-base: 15px;
    --fs-sm: 13px;
    --fs-lg: 17px;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; overflow-x: hidden; }
html { -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-sans);
    font-weight: 400;
    font-size: var(--fs-base);
    line-height: 1.7;
    letter-spacing: 0;
    color: var(--text);
    background: var(--base);
    word-break: keep-all;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ── 헤딩(명조 금지 — Pretendard로 스케일/여백만으로 고급스러움을 만든다) ── */
h1, h2, h3 { font-family: var(--font-sans); font-weight: 600; color: var(--dark); letter-spacing: -0.02em; }
.section-eyebrow {
    font-family: var(--font-en);
    font-size: var(--fs-sm);
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
    display: block;
    margin-bottom: 0.9rem;
    font-weight: 500;
}
.section-lead {
    color: var(--muted);
    font-size: var(--fs-base);
    max-width: 640px;
    margin: 0 auto;
}
.section-head { text-align: center; margin-bottom: 3.2rem; }
.section-head-left { text-align: left; margin-bottom: 2.6rem; max-width: 640px; }

section { padding: var(--space-section) 0; }
@media (max-width: 768px) { section { padding: var(--space-section-sm) 0; } }

/* ── 리빌 모션: 2단 안전 계약 (세부/가이드 페이지용, 기존 유지) ── */
@keyframes vt-reveal {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}
.reveal { animation: vt-reveal 0.9s var(--ease) both; }
.reveal-group > * { animation: vt-reveal 0.9s var(--ease) both; }
.reveal-group > *:nth-child(1) { animation-delay: 0s; }
.reveal-group > *:nth-child(2) { animation-delay: 0.08s; }
.reveal-group > *:nth-child(3) { animation-delay: 0.16s; }
.reveal-group > *:nth-child(4) { animation-delay: 0.24s; }
.reveal-group > *:nth-child(5) { animation-delay: 0.32s; }
.reveal-group > *:nth-child(6) { animation-delay: 0.4s; }
@supports (animation-timeline: view()) {
    .reveal, .reveal-group > * { animation-timeline: view(); animation-range: entry 0% cover 30%; }
}
@media (prefers-reduced-motion: reduce) {
    .reveal, .reveal-group > * { animation: none !important; opacity: 1 !important; transform: none !important; }
}

/* ── SCENE 모션(고정아 레퍼런스 스케일만 차용) — 씬 자체가 아래에서 올라오는 느낌.
   2단 안전계약 유지: 아래 키프레임이 항상 자동재생(both)되어 JS 없어도 100% 노출된다.
   main.js의 GSAP는 이 위에 stagger(이미지→제품명→정보→CTA)만 얹는 순수 강화층. */
@keyframes vt-scene-rise {
    from { opacity: 0; transform: translateY(var(--scene-y)); }
    to   { opacity: 1; transform: translateY(0); }
}
.scene-stagger > * { animation: vt-scene-rise var(--scene-dur) cubic-bezier(0.22, 1, 0.36, 1) both; }
.scene-stagger > *:nth-child(1) { animation-delay: 0s; }
.scene-stagger > *:nth-child(2) { animation-delay: 0.12s; }
.scene-stagger > *:nth-child(3) { animation-delay: 0.24s; }
.scene-stagger > *:nth-child(4) { animation-delay: 0.36s; }
.scene-stagger > *:nth-child(5) { animation-delay: 0.48s; }
@media (prefers-reduced-motion: reduce) {
    .scene-stagger > * { animation: none !important; opacity: 1 !important; transform: none !important; }
}
@media (max-width: 768px) { :root { --scene-y: 36px; --scene-dur: 0.7s; } }

@keyframes vt-scale-in { from { transform: scale(1.03); } to { transform: scale(1); } }
.scale-in { animation: vt-scale-in 1.1s cubic-bezier(0.22, 1, 0.36, 1) both; }
@media (prefers-reduced-motion: reduce) { .scale-in { animation: none !important; transform: none !important; } }

.scene { position: relative; min-height: 88vh; display: flex; align-items: center; padding: var(--space-section) 0; }
.scene.scene-auto { min-height: auto; display: block; }
@media (max-width: 900px) { .scene { min-height: auto; padding: var(--space-section-sm) 0; } }

.scene-h2 { font-size: clamp(1.9rem, 1.5rem + 1.6vw, 2.9rem); line-height: 1.18; letter-spacing: -0.02em; }
.scene-statement { font-size: clamp(2.2rem, 1.7rem + 2.8vw, 4.2rem); line-height: 1.12; letter-spacing: -0.02em; font-weight: 700; margin-bottom: 1.2rem; display: block; }

/* ── 헤더/GNB ── */
.site-header {
    position: sticky; top: 0; z-index: 40;
    background: rgba(247, 246, 242, 0.92);
    backdrop-filter: blur(6px);
    border-bottom: 1px solid var(--line);
    transition: background-color 0.4s ease-out, border-color 0.4s ease-out;
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.brand-mark { font-family: var(--font-en); font-size: 1.15rem; letter-spacing: 0.02em; color: var(--dark); font-weight: 600; }
.brand-mark small { display: block; font-family: var(--font-sans); font-size: 10px; letter-spacing: 0.16em; color: var(--muted); font-weight: 400; }
.gnb { display: flex; gap: 2rem; }
.gnb a { font-size: var(--fs-sm); letter-spacing: 0; color: var(--text); position: relative; padding: 4px 0; }
.gnb a::after {
    content: ''; position: absolute; left: 0; bottom: 0; width: 0; height: 1px; background: var(--accent);
    transition: width 0.3s var(--ease);
}
@media (hover: hover) { .gnb a:hover::after { width: 100%; } }
.header-cta {
    font-size: var(--fs-sm); border: 1px solid var(--dark); padding: 10px 20px;
    transition: background-color 0.3s ease-out, color 0.3s ease-out;
}
.header-cta:hover { background: var(--dark); color: var(--base); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; }
@media (max-width: 1024px) { .gnb { display: none; } .nav-toggle { display: block; } }

/* 헤더 색상 상태 — 씬에 따라 반응(모션이 아니라 가독성 상태) */
.site-header[data-theme="dark"] {
    background: rgba(21, 21, 21, 0.55); backdrop-filter: blur(6px); border-bottom-color: rgba(247,246,242,0.14);
}
.site-header[data-theme="dark"] .brand-mark,
.site-header[data-theme="dark"] .gnb a { color: var(--base); }
.site-header[data-theme="dark"] .brand-mark small { color: rgba(247,246,242,0.6); }
.site-header[data-theme="dark"] .header-cta { border-color: var(--base); color: var(--base); }
.site-header[data-theme="dark"] .nav-toggle { color: var(--base); }

/* 우측 씬 인디케이터(숫자만, 데스크톱 전용) */
.scene-nav { position: fixed; right: 20px; top: 50%; transform: translateY(-50%); z-index: 45; display: flex; flex-direction: column; gap: 12px; }
.scene-nav a { font-family: var(--font-en); font-size: 11px; color: var(--muted); transition: color 0.3s ease-out, opacity 0.3s ease-out; opacity: 0.5; }
.scene-nav a.is-active { color: var(--accent); opacity: 1; }
@media (max-width: 1200px) { .scene-nav { display: none; } }

/* ── 01 HERO — 차 광고: 사진이 주인공, 브랜드는 헤더에만 작게 ── */
.hero-commerce { position: relative; display: grid; grid-template-columns: 40% 60%; min-height: 90vh; background: var(--base); overflow: hidden; }
.hero-visual { position: relative; overflow: hidden; order: 2; }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }
.hero-panel { position: relative; display: flex; flex-direction: column; justify-content: center; padding: 4rem 3.5vw; order: 1; }
.hero-panel h1 { font-size: clamp(2.6rem, 2rem + 3.6vw, 5.2rem); line-height: 1.04; margin: 0 0 1.3rem; max-width: 4em; }
.hero-hook { font-size: clamp(1.2rem, 1.05rem + 0.6vw, 1.5rem); font-weight: 600; color: var(--dark); line-height: 1.4; margin-bottom: 1rem; }
.hero-sub { color: var(--muted); font-size: var(--fs-base); line-height: 1.7; max-width: 380px; }
.hero-cta { margin-top: 1.8rem; display: inline-flex; gap: 12px; flex-wrap: wrap; }
.fact-strip { display: flex; gap: 1.8rem; margin-top: 2.6rem; padding-top: 1.6rem; border-top: 1px solid var(--line); flex-wrap: wrap; }
.fact-strip dt { font-family: var(--font-en); font-size: 11px; letter-spacing: 0.1em; color: var(--muted); }
.fact-strip dd { margin: 0.2rem 0 0; font-size: var(--fs-base); color: var(--dark); font-weight: 600; }
@media (max-width: 900px) {
    .hero-commerce { grid-template-columns: 1fr; min-height: auto; }
    .hero-visual { order: 1; height: 46vh; }
    .hero-panel { order: 2; padding: 2.6rem 24px 3rem; }
}

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 13px 28px; font-size: var(--fs-sm); font-weight: 600; letter-spacing: 0;
    border: 1px solid var(--accent); transition: background-color 0.3s ease-out, color 0.3s ease-out;
    min-height: 44px;
}
.btn-accent { background: var(--accent); color: var(--base); }
.btn-accent:hover { background: var(--accent-soft); }
.btn-outline-dark { border-color: var(--line); color: var(--dark); }
.btn-outline-dark:hover { background: var(--surface); }

/* ── 02 LEMON MYRTLE — 제품 최우선 ── */
.scene-product .container { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 5vw; align-items: center; }
.scene-product .product-visual img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.scene-product .scene-statement { font-family: var(--font-en); }
.product-index { width: 100%; border-collapse: collapse; margin-top: 1.6rem; border-top: 1px solid var(--line); }
.product-index tr { display: flex; justify-content: space-between; padding: 1rem 0; border-bottom: 1px solid var(--line); font-size: var(--fs-base); }
.product-index th { color: var(--muted); font-weight: 400; text-align: left; }
.product-index td { color: var(--dark); font-weight: 600; text-align: right; }
@media (max-width: 900px) { .scene-product .container { grid-template-columns: 1fr; gap: 2rem; } }

/* ── 03 SENSORY — 향을 판다 ── */
.sensory-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 5vw; align-items: center; }
.sensory-words {
    font-family: var(--font-en); font-weight: 700; text-transform: uppercase;
    font-size: clamp(2.4rem, 1.8rem + 4vw, 5.5rem); line-height: 1.02; letter-spacing: -0.01em;
    color: var(--dark); margin: 0;
}
.sensory-copy { color: var(--muted); font-size: var(--fs-lg); margin-top: 1.6rem; line-height: 1.6; }
.sensory-visual img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
@media (max-width: 900px) { .sensory-grid { grid-template-columns: 1fr; gap: 2rem; } }

/* ── 04 VISUAL BREAK — 제품 광고 컷, 순수 사진 (색보정/틴트 없음) ── */
.visual-break { position: relative; min-height: 78vh; padding: 0; display: flex; align-items: flex-end; overflow: hidden; }
.visual-break img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 0; }
.break-copy {
    position: relative; z-index: 1; margin: 0 0 3rem 3rem;
    background: rgba(247,246,242,0.92); color: var(--dark);
    font-size: clamp(1.6rem, 1.3rem + 1.4vw, 2.6rem); font-weight: 700; line-height: 1.2;
    padding: 1.4rem 1.8rem; display: inline-block;
}
@media (max-width: 768px) { .break-copy { margin: 0 0 2rem 1.2rem; font-size: 1.5rem; padding: 1.1rem 1.4rem; } }

/* ── 05 WHO IS IT FOR — 구매 결정 로우 ── */
.decision-rows { border-top: 1px solid var(--line); max-width: 640px; }
.decision-rows li {
    display: flex; justify-content: space-between; align-items: center;
    padding: 1.6rem 0; border-bottom: 1px solid var(--line);
    font-size: clamp(1.05rem, 0.95rem + 0.5vw, 1.3rem); color: var(--dark); font-weight: 500;
}
.decision-rows .check { color: var(--accent); font-size: 1.3rem; font-weight: 700; }

/* ── 06 BRAND PROOF — 짧게(35~50vh) ── */
.brand-proof { padding: 4rem 0; background: var(--surface); }
.brand-proof-grid { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 4vw; align-items: center; }
.brand-proof-grid img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.brand-proof-grid h2 { font-weight: 500; font-size: clamp(1.3rem, 1.1rem + 0.8vw, 1.8rem); line-height: 1.5; color: var(--dark); }
@media (max-width: 900px) { .brand-proof-grid { grid-template-columns: 1fr; gap: 1.6rem; } }

/* ── 07 JOURNAL — 매거진 목차형 피처 로우(실제 발행 콘텐츠만) ── */
.feature-list { border-bottom: 1px solid var(--line); }
.feature-row {
    position: relative; display: grid; grid-template-columns: 160px 1fr auto;
    align-items: center; gap: 2rem; padding: 2.2rem 0;
    border-top: 1px solid var(--line);
    transition: padding-left 0.35s var(--ease);
}
.feature-num {
    position: absolute; left: 172px; top: 50%; transform: translateY(-50%);
    font-family: var(--font-en); font-weight: 700; color: rgba(21,21,21,0.06);
    font-size: 6.5rem; line-height: 1; z-index: 0; user-select: none;
}
@media (max-width: 768px) { .feature-num { display: none; } }
.feature-media { position: relative; z-index: 1; }
.feature-media img { width: 160px; aspect-ratio: 4/3; object-fit: cover; }
.feature-text { position: relative; z-index: 1; }
.feature-cat { font-size: var(--fs-sm); color: var(--muted); }
.feature-row h3 { font-size: clamp(1.3rem, 1.1rem + 1vw, 1.9rem); margin-top: 0.4rem; }
.feature-arrow { position: relative; z-index: 1; font-size: var(--fs-sm); color: var(--accent); white-space: nowrap; transition: color 0.3s ease-out; }
@media (hover: hover) { .feature-row:hover { padding-left: 1.2rem; } .feature-row:hover .feature-arrow { color: var(--dark); } }
@media (max-width: 768px) {
    .feature-row { grid-template-columns: 96px 1fr; row-gap: 0.6rem; padding: 1.6rem 0; }
    .feature-arrow { grid-column: 2; }
    .feature-media img { width: 96px; }
}

/* ── 08 FAQ 아코디언 (카드/음영 없음) ── */
.faq-list { max-width: 780px; margin: 0; border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
    width: 100%; text-align: left; background: none; border: 0; cursor: pointer;
    display: flex; justify-content: space-between; align-items: center;
    padding: 1.4rem 0.2rem; font-size: var(--fs-lg); font-weight: 500; color: var(--dark); font-family: var(--font-sans);
    min-height: 44px;
}
.faq-q .icon { font-family: var(--font-en); color: var(--accent); transition: transform 0.35s var(--ease); }
.faq-item[data-open="true"] .icon { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.4s var(--ease); color: var(--muted); font-size: var(--fs-base); }
.faq-item[data-open="true"] .faq-a { max-height: 480px; }
.faq-a-inner { padding: 0 0.2rem 1.4rem; }

/* ── 09 FINAL — 카본 다크 필드(유일한 다크 노트, 푸터로 자연스럽게 이어짐) ── */
.scene-final {
    background: var(--dark); color: var(--base); text-align: center;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    min-height: 76vh; padding: var(--space-section) 24px;
}
.scene-final .final-visual { width: 220px; margin: 0 auto 2.2rem; }
.scene-final .final-visual img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.scene-final .scene-statement { color: var(--base); font-size: clamp(1.9rem, 1.5rem + 2.2vw, 3.2rem); }
.scene-final .section-eyebrow { color: var(--accent-soft); }
.scene-final .btn-accent { margin-top: 1rem; }

/* ── 세부/가이드 페이지 공통 컴포넌트 ── */
.detail-hero { position: relative; }
.detail-hero img { width: 100%; aspect-ratio: 16/9; object-fit: cover; height: auto; }
.detail-body { max-width: 760px; margin: 0 auto; padding: 3.5rem 24px 0; }
.detail-intro { font-size: var(--fs-lg); color: var(--dark); line-height: 1.8; margin-bottom: 2.6rem; }
.detail-figure { margin: 2.6rem 0; }
.detail-figure img { width: 100%; aspect-ratio: 16/9; object-fit: cover; height: auto; }
.detail-figure figcaption { font-size: var(--fs-sm); color: var(--muted); margin-top: 0.6rem; text-align: center; }

.split-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2.4rem; align-items: center; margin: 2.6rem 0; }
.editorial-col.align-left { text-align: left; }
@media (max-width: 768px) { .split-grid { grid-template-columns: 1fr; } }

.info-rows { border-top: 1px solid var(--line); }
.info-row { display: flex; justify-content: space-between; padding: 0.9rem 0; border-bottom: 1px solid var(--line); font-size: var(--fs-sm); }
.info-row dt { color: var(--muted); }
.info-row dd { margin: 0; color: var(--dark); font-weight: 500; }

.icon-list, .check-list { display: flex; flex-wrap: wrap; gap: 10px; margin: 1.6rem 0; }
.icon-list li, .check-list li { border: 1px solid var(--line); padding: 8px 16px; font-size: var(--fs-sm); color: var(--dark); }
.check-list li::before { content: '— '; color: var(--accent); }

.callout { background: var(--surface); border-left: 2px solid var(--accent); padding: 1.4rem 1.6rem; margin: 2.4rem 0; font-size: var(--fs-sm); color: var(--dark); }

.compare-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 1.4rem; margin: 2.4rem 0; }
.compare-card { border: 1px solid var(--line); padding: 1.6rem; }
.compare-card h4 { font-size: 0.95rem; margin-bottom: 0.8rem; }
.compare-card ul li { font-size: var(--fs-sm); color: var(--muted); padding: 4px 0; }
@media (max-width: 768px) { .compare-cards { grid-template-columns: 1fr; } }

/* ── 프로세스/타임라인 (연결선은 .proc-step 자체 기준 — 좌표 계산 불필요) ── */
.proc-list { display: flex; list-style: none; margin: 2.6rem 0; padding: 0; }
.proc-step { flex: 1; position: relative; padding: 0 12px; text-align: center; }
.proc-step:not(:last-child)::after {
    content: ''; position: absolute; top: 24px; left: 50%; width: 100%; height: 2px;
    background: var(--line); z-index: 0;
}
.proc-num {
    position: relative; z-index: 1; margin: 0 auto 12px; width: 48px; height: 48px;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    background: var(--base); border: 1px solid var(--accent); color: var(--dark); font-family: var(--font-en);
}
.proc-step p { font-size: var(--fs-sm); color: var(--muted); }
@media (max-width: 768px) {
    .proc-list { flex-direction: column; gap: 10px; }
    .proc-step { padding: 24px 0; }
    .proc-step::after { display: none; }
}

/* ── 관련 콘텐츠 그리드 (필수, 실사진 썸네일) ── */
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; margin-top: 1.6rem; }
.related-card { display: block; }
.related-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; height: auto; }
.related-card .rc-title { font-size: var(--fs-sm); color: var(--dark); margin-top: 0.7rem; }
@media (max-width: 1024px) { .related-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .related-grid { grid-template-columns: 1fr; } }

/* ── VIP CTA(세부페이지용) ── */
.vip-cta, .vip-cta-plain { text-align: center; padding: 3.2rem 2rem; margin: 3rem 0; }
.vip-cta { background: var(--dark); color: var(--base); }
.vip-cta h3 { color: var(--base); font-size: 1.3rem; }
.vip-cta p { color: rgba(247,246,242,0.75); margin-top: 0.6rem; font-size: var(--fs-sm); }
.vip-cta-plain { border: 1px solid var(--line); }
.vip-cta .btn-accent, .vip-cta-plain .btn-accent { margin-top: 1.4rem; }

.detail-faq { margin-top: 3rem; }
.detail-faq h2 { margin-bottom: 1.2rem; }

/* ── 푸터 ── */
.site-footer { background: var(--dark); color: rgba(247,246,242,0.82); padding: 4rem 0 1.6rem; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 2.4rem; }
.footer-grid h4 { color: var(--base); font-size: var(--fs-sm); letter-spacing: 0.04em; margin-bottom: 1rem; font-family: var(--font-sans); font-weight: 600; }
.footer-grid ul li { padding: 5px 0; }
.footer-grid a { font-size: var(--fs-sm); color: rgba(247,246,242,0.7); }
.footer-biz { font-size: 12px; line-height: 1.9; color: rgba(247,246,242,0.55); }
.footer-bottom {
    margin-top: 2.4rem; padding-top: 1.4rem; border-top: 1px solid rgba(247,246,242,0.14);
    font-size: 12px; color: rgba(247,246,242,0.45); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr; gap: 1.8rem; } }

.skip-link { position: absolute; left: -999px; top: 0; background: var(--dark); color: var(--base); padding: 10px 16px; z-index: 100; }
.skip-link:focus { left: 12px; top: 12px; }
.sr-only { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }

/* ── 플로팅 스크롤탑 버튼 ── */
.scroll-top-btn {
    position: fixed; right: 22px; bottom: 22px; width: 50px; height: 50px;
    border-radius: 50%; background: var(--accent); color: var(--base); border: 0;
    font-size: 1.1rem; cursor: pointer; z-index: 60;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transform: translateY(12px);
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), visibility 0.3s, background-color 0.3s ease-out;
}
.scroll-top-btn.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.scroll-top-btn:hover { background: var(--accent-soft); }