/* ======================================================================
   리더블 (Readable) — 카페24 상세페이지 텍스트화 서비스 랜딩
   B2B SaaS 톤 · 포인트 컬러 1종(인디고) · Pretendard · 반응형
   ====================================================================== */

:root {
  --c-ink: #141821;
  --c-ink-soft: #475067;
  --c-ink-faint: #6b7489;
  --c-line: #e4e7ef;
  --c-bg: #ffffff;
  --c-bg-muted: #f6f8fc;
  --c-bg-calc: #0f1430;
  --c-point: #3b4fe4;
  --c-point-dark: #2a3bc0;
  --c-point-soft: #eef0ff;
  --c-good: #1f9d5b;
  --c-warn: #c6403c;
  --c-warn-soft: #fdecec;

  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 14px 40px -18px rgba(20, 24, 33, 0.28);
  --shadow-soft: 0 6px 20px -12px rgba(20, 24, 33, 0.22);
  --maxw: 1120px;
  --font: "Pretendard Variable", Pretendard, -apple-system, BlinkMacSystemFont,
    "Apple SD Gothic Neo", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--c-ink);
  background: var(--c-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { line-height: 1.25; letter-spacing: -0.02em; margin: 0; }

p { margin: 0; }

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 12px 22px;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease, box-shadow 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--sm { padding: 8px 16px; font-size: 0.9rem; }
.btn--lg { padding: 15px 30px; font-size: 1.05rem; }
.btn--primary {
  background: var(--c-point);
  color: #fff;
  box-shadow: var(--shadow-soft);
}
.btn--primary:hover { background: var(--c-point-dark); }
.btn--ghost {
  background: transparent;
  color: var(--c-ink);
  border-color: var(--c-line);
}
.btn--ghost:hover { border-color: var(--c-point); color: var(--c-point); }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--c-line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; }
.brand__mark {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  background: var(--c-point);
  color: #fff;
  border-radius: 9px;
  font-weight: 800;
}
.brand__name { font-size: 1.1rem; letter-spacing: -0.02em; }
.brand__name small { font-weight: 500; color: var(--c-ink-faint); font-size: 0.72rem; margin-left: 4px; }
.site-nav { display: flex; gap: 22px; margin-left: auto; font-size: 0.95rem; color: var(--c-ink-soft); }
.site-nav a:hover { color: var(--c-point); }
.site-header__cta { margin-left: 8px; }

/* ---------- Hero ---------- */
.hero {
  padding: clamp(64px, 10vw, 128px) 0 clamp(56px, 8vw, 104px);
  background:
    radial-gradient(1200px 500px at 50% -10%, var(--c-point-soft), transparent 60%),
    var(--c-bg);
  text-align: center;
}
.hero__inner { max-width: 820px; margin: 0 auto; }
.hero__eyebrow {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--c-point);
  background: var(--c-point-soft);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 22px;
}
.hero__title { font-size: clamp(2rem, 5.2vw, 3.4rem); font-weight: 800; }
.hero__lead {
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  color: var(--c-ink-soft);
  margin: 24px auto 0;
  max-width: 660px;
}
.hero__actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 36px;
}
.hero__note { margin-top: 20px; font-size: 0.9rem; color: var(--c-ink-faint); }

/* ---------- Section base ---------- */
.section { padding: clamp(64px, 9vw, 112px) 0; }
.section--muted { background: var(--c-bg-muted); }
.section__head { max-width: 720px; margin: 0 auto clamp(40px, 6vw, 64px); text-align: center; }
.section__eyebrow {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-point);
  margin-bottom: 12px;
}
.section__title { font-size: clamp(1.6rem, 3.6vw, 2.4rem); font-weight: 800; }
.section__sub { margin-top: 16px; font-size: 1.08rem; color: var(--c-ink-soft); }

/* ---------- Cards / grids ---------- */
.problem-grid, .solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card, .feature, .price-card {
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 30px 28px;
}
.section--muted .card { background: #fff; }
.card__title, .feature__title { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; }
.card p, .feature p { color: var(--c-ink-soft); }

.feature__icon { font-size: 1.9rem; margin-bottom: 14px; }

.quote { margin: 0; }
.quote p {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--c-ink);
  padding-left: 16px;
  border-left: 3px solid var(--c-point);
}
.quote__src { margin-top: 10px; font-size: 0.9rem; color: var(--c-ink-faint); }

/* ---------- Pricing ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 28px;
}
.price-card { text-align: center; }
.price-card__label { font-size: 1rem; font-weight: 700; color: var(--c-ink-soft); margin-bottom: 14px; }
.price-card__value { font-size: 2rem; font-weight: 800; color: var(--c-point); }
.price-card__unit { font-size: 0.95rem; font-weight: 600; color: var(--c-ink-faint); }
.price-card__desc { margin-top: 14px; font-size: 0.95rem; color: var(--c-ink-soft); }

.surcharge-list {
  list-style: none;
  margin: 0;
  padding: 24px 28px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  display: grid;
  gap: 12px;
}
.surcharge-list li { position: relative; padding-left: 26px; color: var(--c-ink-soft); }
.surcharge-list li::before {
  content: "";
  position: absolute;
  left: 4px; top: 10px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--c-ink-faint);
}
.surcharge-list li strong { color: var(--c-ink); }
.surcharge-list__highlight {
  padding-top: 14px;
  margin-top: 4px;
  border-top: 1px dashed var(--c-line);
  color: var(--c-ink) !important;
}
.surcharge-list__highlight::before { background: var(--c-good); top: 24px; }

/* ---------- Calculator ---------- */
.section--calc {
  background:
    radial-gradient(900px 500px at 50% 0%, #1b2454, transparent 70%),
    var(--c-bg-calc);
  color: #fff;
}
.section--calc .section__eyebrow { color: #8ea0ff; }
.section--calc .section__title { color: #fff; }
.section--calc .section__sub { color: #c3cae6; }

.calc {
  max-width: 680px;
  margin: 0 auto;
  background: #fff;
  color: var(--c-ink);
  border-radius: 22px;
  padding: clamp(28px, 4vw, 40px);
  box-shadow: 0 30px 70px -30px rgba(0, 0, 0, 0.6);
}
.calc__form { display: grid; gap: 18px; }
.calc__field { display: grid; gap: 8px; }
.calc__label { font-size: 0.92rem; font-weight: 600; color: var(--c-ink-soft); }
.calc__input {
  width: 100%;
  font: inherit;
  padding: 14px 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  background: var(--c-bg-muted);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.calc__input:focus {
  outline: none;
  border-color: var(--c-point);
  background: #fff;
  box-shadow: 0 0 0 3px var(--c-point-soft);
}
.calc__row {
  display: flex;
  align-items: flex-end;
  gap: 22px;
  flex-wrap: wrap;
}
.calc__field--inline { flex: 0 0 120px; }
.calc__input--num { text-align: center; }
.calc__check {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.95rem;
  color: var(--c-ink-soft);
  cursor: pointer;
  padding-bottom: 14px;
}
.calc__check input { width: 18px; height: 18px; accent-color: var(--c-point); }
.calc__submit { width: 100%; margin-top: 4px; }
.calc__hint { font-size: 0.86rem; color: var(--c-ink-faint); text-align: center; }

/* loading */
.calc__loading { text-align: center; padding: 36px 10px 12px; }
.spinner {
  width: 44px; height: 44px;
  margin: 0 auto 18px;
  border: 4px solid var(--c-point-soft);
  border-top-color: var(--c-point);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.calc__loading-text { font-weight: 600; color: var(--c-ink-soft); }

/* result */
.calc__result { margin-top: 26px; }
.result-head { text-align: center; margin-bottom: 22px; }
.result-head h3 { font-size: 1.3rem; font-weight: 800; }
.result-head p { color: var(--c-ink-faint); font-size: 0.92rem; margin-top: 6px; word-break: break-all; }

.result-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}
.metric {
  background: var(--c-bg-muted);
  border-radius: var(--radius-sm);
  padding: 18px 14px;
  text-align: center;
}
.metric__label { font-size: 0.82rem; color: var(--c-ink-faint); }
.metric__value { font-size: 1.5rem; font-weight: 800; margin-top: 6px; }
.metric--text .metric__value { color: var(--c-ink); }
.metric--text.is-zero {
  background: var(--c-warn-soft);
  box-shadow: inset 0 0 0 1px rgba(198, 64, 60, 0.35);
}
.metric--text.is-zero .metric__value { color: var(--c-warn); }
.metric--text .metric__flag {
  display: block;
  margin-top: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--c-warn);
}

.result-quote {
  background: var(--c-point);
  color: #fff;
  border-radius: var(--radius);
  padding: 24px 26px;
  text-align: center;
}
.result-quote__label { font-size: 0.9rem; opacity: 0.85; }
.result-quote__total { font-size: 2.3rem; font-weight: 800; margin: 6px 0; }
.result-quote__meta { font-size: 0.9rem; opacity: 0.9; }
.result-quote__meta span { white-space: nowrap; }

.result-disclaimer {
  margin-top: 16px;
  font-size: 0.86rem;
  color: var(--c-ink-faint);
  text-align: center;
  line-height: 1.6;
}
.result-cta { margin-top: 20px; text-align: center; }
.result-cta .btn { width: 100%; }
.result-cta__hint { margin-top: 10px; font-size: 0.85rem; color: var(--c-ink-faint); }

/* error */
.calc__error {
  margin-top: 24px;
  background: var(--c-warn-soft);
  border: 1px solid rgba(198, 64, 60, 0.3);
  border-radius: var(--radius);
  padding: 22px 24px;
  text-align: center;
}
.calc__error h3 { color: var(--c-warn); font-size: 1.1rem; margin-bottom: 8px; }
.calc__error p { color: var(--c-ink-soft); margin-bottom: 16px; }
.calc__error .btn { }

/* ---------- Process ---------- */
.process {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px 40px;
  counter-reset: step;
}
.process__step {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: 20px 0;
  border-top: 1px solid var(--c-line);
}
.process__num {
  flex: 0 0 auto;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  background: var(--c-point-soft);
  color: var(--c-point);
  font-weight: 800;
  border-radius: 50%;
}
.process__step h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 4px; }
.process__step p { color: var(--c-ink-soft); font-size: 0.95rem; }

/* ---------- FAQ ---------- */
.faq { max-width: 760px; margin: 0 auto; display: grid; gap: 14px; }
.faq__item {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  padding: 4px 22px;
}
.faq__item summary {
  cursor: pointer;
  font-weight: 700;
  padding: 16px 0;
  list-style: none;
  position: relative;
  padding-right: 28px;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "+";
  position: absolute;
  right: 0; top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--c-point);
  transition: transform 0.2s ease;
}
.faq__item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq__item p { color: var(--c-ink-soft); padding: 0 0 18px; }

/* ---------- Footer ---------- */
.site-footer { background: var(--c-ink); color: #cbd2e4; padding: 64px 0 0; }
.site-footer__inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}
.site-footer__name { color: #fff; font-size: 1.4rem; }
.site-footer__name span { color: #8ea0ff; font-size: 0.9rem; font-weight: 500; }
.site-footer__desc { margin-top: 14px; max-width: 520px; line-height: 1.7; }
.site-footer__contact h3 { color: #fff; font-size: 1rem; margin-bottom: 10px; }
.site-footer__contact a { color: #8ea0ff; }
.site-footer__contact .btn { margin-top: 16px; }
.site-footer__legal {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 22px; padding-bottom: 30px;
  font-size: 0.85rem;
  color: #8b94ad;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .site-nav { display: none; }
  .problem-grid, .solution-grid, .pricing-grid { grid-template-columns: 1fr; }
  .process { grid-template-columns: 1fr; gap: 0; }
  .result-metrics { grid-template-columns: 1fr; }
  .site-footer__inner { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 560px) {
  .container { padding: 0 18px; }
  .hero__actions .btn { width: 100%; }
  .calc__row { flex-direction: column; align-items: stretch; }
  .calc__field--inline { flex: 1 1 auto; }
  .calc__check { padding-bottom: 0; }
  .result-quote__total { font-size: 1.9rem; }
}

/* 모션 최소화 선호 사용자 배려 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .spinner { animation-duration: 1.6s; }
  [data-aos] { transition: none !important; transform: none !important; opacity: 1 !important; }
}