/* 수험생 영양제 칼럼 — 피곤함 네 칸, 수면 제한 실험 띠, 비염 오즈비 막대, 연구 세 묶음 */
.sv-page {
  --sv-deep: #173f37;
  --sv-green: #247860;
  --sv-teal: #3c605a;
  --sv-soft-teal: #5a96a2;
  --sv-soft: #eef3f0;
  --sv-paper: #f8f8f6;
  --sv-warm: #e8e4e2;
  --sv-ink: #242824;
  --sv-muted: #555550;
  --sv-line: #d7dfdb;
  overflow: clip;
  background: #fff;
  color: var(--sv-ink);
  font-family: "Pretendard Variable", Pretendard, "Noto Sans KR", sans-serif;
}

.sv-page * { box-sizing: border-box; }

/* 머리말 */
.sv-header { max-width: 1080px; margin: auto; padding: 92px 28px 40px; text-align: center; }
.sv-header .column-breadcrumb { justify-content: center; margin-bottom: 26px; }
.sv-eyebrow { margin: 0 0 18px; color: var(--sv-green); font-size: .72rem; font-weight: 800; letter-spacing: .14em; }
.sv-header h1 { max-width: 900px; margin: 0 auto; color: var(--sv-deep); font-size: clamp(2rem, 4.4vw, 3.7rem); font-weight: 650; line-height: 1.22; letter-spacing: -.055em; word-break: keep-all; }
.sv-lead { max-width: 760px; margin: 26px auto 22px; color: var(--sv-muted); font-size: clamp(1rem, 1.6vw, 1.12rem); line-height: 1.9; word-break: keep-all; }
.sv-byline { display: flex; justify-content: center; gap: 18px; color: #718078; font-size: .78rem; }
.sv-byline a { color: var(--sv-green); }

/* 첫 화면 — 피곤함 네 칸 */
.sv-hero {
  position: relative;
  isolation: isolate;
  width: min(1120px, calc(100% - 56px));
  margin: 0 auto 78px;
  padding: clamp(2rem, 4.5vw, 3.4rem);
  overflow: hidden;
  border-radius: 28px;
  background: linear-gradient(135deg, var(--sv-deep) 0%, #1f5a4c 60%, var(--sv-green) 100%);
  color: #fff;
}

.sv-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  right: -8rem;
  top: -10rem;
  width: 24rem;
  height: 24rem;
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 50%;
  box-shadow: 0 0 0 4rem rgba(255, 255, 255, .03), 0 0 0 8rem rgba(255, 255, 255, .02);
}

.sv-hero__head small { color: #c9e7da; font-size: .66rem; font-weight: 800; letter-spacing: .18em; }
.sv-hero__head h2 { margin: .7rem 0 .45rem; color: #fff; font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 680; letter-spacing: -.045em; word-break: keep-all; }
.sv-hero__head p { margin: 0; color: rgba(255, 255, 255, .78); font-size: .92rem; line-height: 1.7; word-break: keep-all; }

.sv-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .7rem; margin: 1.8rem 0 0; padding: 0; list-style: none; }
.sv-grid li { min-width: 0; }
.sv-grid a {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  height: 100%;
  min-height: 150px;
  padding: 1.15rem 1.1rem;
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 18px;
  background: rgba(255, 255, 255, .08);
  color: #fff;
  text-decoration: none;
  transition: background-color .22s ease, border-color .22s ease, transform .22s ease;
}
.sv-grid a:hover { border-color: rgba(255, 255, 255, .45); background: rgba(255, 255, 255, .13); transform: translateY(-2px); }
.sv-grid__no { color: #c9e7da; font-size: .62rem; font-weight: 800; letter-spacing: .14em; }
.sv-grid strong { font-size: 1.18rem; font-weight: 700; letter-spacing: -.04em; line-height: 1.35; word-break: keep-all; }
.sv-grid em { margin-top: auto; color: rgba(255, 255, 255, .72); font-size: .8rem; font-style: normal; line-height: 1.55; word-break: keep-all; }
.sv-grid li.is-key a { border-color: #fff; background: #fff; color: var(--sv-deep); box-shadow: 0 .9rem 2rem rgba(4, 37, 29, .25); }
.sv-grid li.is-key .sv-grid__no { color: var(--sv-green); }
.sv-grid li.is-key em { color: var(--sv-teal); }

/* 본문 배치 */
.sv-layout { display: grid; grid-template-columns: 190px minmax(0, 720px); gap: clamp(2rem, 5vw, 5rem); justify-content: center; max-width: 1120px; margin: 0 auto; padding: 0 28px 96px; }
.sv-toc { position: sticky; top: 108px; align-self: start; }
.sv-toc small { display: block; margin-bottom: 1rem; color: var(--sv-green); font-size: .66rem; font-weight: 800; letter-spacing: .16em; }
.sv-toc ol { margin: 0; padding: 0 0 0 1rem; border-left: 1px solid var(--sv-line); list-style: none; }
.sv-toc li + li { margin-top: .85rem; }
.sv-toc a { color: #6b746f; font-size: .8rem; line-height: 1.5; text-decoration: none; word-break: keep-all; }
.sv-toc a:hover { color: var(--sv-green); }

.sv-article { min-width: 0; }
/* style.css가 모든 section에 위아래 여백을 준다. 본문 절 사이 간격은 소제목 여백만으로 잡는다. */
.sv-article > section { padding: 0; }
.sv-article section[id] { scroll-margin-top: 110px; }
.sv-article h2 { margin: 3.6rem 0 1.3rem; color: var(--sv-deep); font-size: clamp(1.45rem, 2.6vw, 1.95rem); font-weight: 680; line-height: 1.4; letter-spacing: -.045em; word-break: keep-all; }
.sv-article p { margin: 0 0 1.35rem; color: #3a403c; font-size: 1.04rem; line-height: 1.95; word-break: keep-all; }
.sv-article strong { color: var(--sv-deep); }
.sv-article a { color: var(--sv-green); text-underline-offset: 3px; }
.sv-article sup { margin-left: 1px; font-size: .68em; line-height: 0; }
.sv-article sup a { text-decoration: none; font-weight: 700; }

.sv-quote { margin: 2rem 0 !important; padding: 1.5rem 1.8rem; border-left: 3px solid var(--sv-green); background: var(--sv-soft); color: var(--sv-deep) !important; font-size: clamp(1.2rem, 2.3vw, 1.5rem) !important; font-weight: 650; line-height: 1.6 !important; letter-spacing: -.03em; }

/* 도판 공통 */
.sv-figure { margin: 2.6rem 0; padding: clamp(1.4rem, 3.5vw, 2.2rem); border: 1px solid var(--sv-line); border-radius: 20px; background: var(--sv-paper); }
.sv-figure figcaption { margin-bottom: 1.5rem; }
.sv-figure figcaption span { display: block; margin-bottom: .45rem; color: var(--sv-green); font-size: .66rem; font-weight: 800; letter-spacing: .16em; }
.sv-figure figcaption strong { display: block; color: var(--sv-deep); font-size: 1.15rem; line-height: 1.45; letter-spacing: -.03em; word-break: keep-all; }
.sv-figure > small { display: block; margin-top: 1.2rem; color: #6b746f; font-size: .76rem; line-height: 1.7; word-break: keep-all; }
.sv-figure__result { margin: 1.3rem 0 0 !important; padding: 1rem 1.1rem; border-radius: 14px; background: #fff; font-size: .92rem !important; line-height: 1.75 !important; box-shadow: inset 0 0 0 1px var(--sv-line); }
.sv-figure__result b { display: inline-block; margin-right: .5rem; color: var(--sv-green); font-size: .72rem; letter-spacing: .1em; }

/* 도판 1 — 수면 제한 실험 띠 (가로 13칸: 기준 3 · 조작 7 · 회복 3) */
.sv-timeline { display: grid; gap: .75rem; }
.sv-timeline__row { display: grid; grid-template-columns: 92px minmax(0, 1fr); align-items: center; gap: .9rem; }
.sv-timeline__label { color: var(--sv-muted); font-size: .84rem; font-weight: 700; line-height: 1.3; }
.sv-timeline__label small { display: block; color: #8a938e; font-size: .7rem; font-weight: 600; }
.sv-timeline__row.is-key .sv-timeline__label { color: var(--sv-green); }
.sv-timeline__track { display: flex; gap: 3px; height: 40px; }
.sv-timeline__track i { position: relative; display: flex; align-items: center; justify-content: center; flex: var(--w) 1 0; min-width: 0; border-radius: 8px; font-style: normal; }
.sv-timeline__track i b { overflow: hidden; color: #fff; font-size: .74rem; font-weight: 700; white-space: nowrap; text-overflow: ellipsis; padding: 0 .3rem; }
.sv-timeline__track .is-base { background: #9fb9b1; }
.sv-timeline__track .is-full { background: var(--sv-teal); }
.sv-timeline__track .is-short { background: repeating-linear-gradient(135deg, var(--sv-green) 0 10px, #2c876d 10px 20px); box-shadow: 0 0 0 3px rgba(36, 120, 96, .18); }
.sv-timeline__track .is-recover { background: #9fb9b1; }
.sv-timeline__track .is-recover::after { content: "!"; position: absolute; top: -8px; right: -6px; display: grid; width: 18px; height: 18px; place-items: center; border-radius: 50%; background: #fff; color: var(--sv-green); font-size: .72rem; font-weight: 800; box-shadow: 0 0 0 1.5px var(--sv-green); }
.sv-timeline__axis { display: flex; gap: 3px; margin-left: calc(92px + .9rem); color: #8a938e; font-size: .7rem; }
.sv-timeline__axis span { flex: var(--w) 1 0; min-width: 0; text-align: center; white-space: nowrap; }

/* 도판 2 — 비염 오즈비 막대 (최대 2.5배 기준) */
.sv-odds { display: grid; gap: .65rem; margin: 0; padding: 0; list-style: none; }
.sv-odds li { display: grid; grid-template-columns: 118px minmax(0, 1fr) 70px; align-items: center; gap: .8rem; }
.sv-odds li > span { color: var(--sv-muted); font-size: .84rem; font-weight: 650; word-break: keep-all; }
.sv-odds li > b { color: var(--sv-deep); font-size: .86rem; font-weight: 750; text-align: right; white-space: nowrap; }
.sv-odds__bar { position: relative; height: 26px; border-radius: 7px; background: repeating-linear-gradient(90deg, transparent 0 calc(40% - 1px), rgba(36, 120, 96, .12) calc(40% - 1px) 40%), #fff; box-shadow: inset 0 0 0 1px var(--sv-line); }
.sv-odds__bar i { position: absolute; top: 4px; bottom: 4px; left: 0; width: calc(var(--v) / 2.5 * 100%); border-radius: 5px; background: var(--sv-soft-teal); }
.sv-odds li.is-key .sv-odds__bar i { background: var(--sv-green); }
.sv-odds li.is-key > span, .sv-odds li.is-key > b { color: var(--sv-green); }
.sv-odds li.is-flat .sv-odds__bar { background: repeating-linear-gradient(135deg, transparent 0 8px, rgba(85, 85, 80, .08) 8px 10px), #fff; }
.sv-odds li.is-flat > b, .sv-odds li.is-flat > span { color: #8a938e; }

/* 도판 3 — 연구 세 묶음 */
.sv-studies { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem; }
.sv-study { display: flex; flex-direction: column; min-width: 0; padding: 1.2rem 1.1rem; border: 1px solid var(--sv-line); border-radius: 16px; background: #fff; }
.sv-study.is-key { border-color: var(--sv-green); box-shadow: 0 0 0 1px var(--sv-green); }
.sv-study small { color: var(--sv-green); font-size: .62rem; font-weight: 800; letter-spacing: .14em; }
.sv-study h3 { margin: .5rem 0 .8rem; color: var(--sv-deep); font-size: 1.02rem; line-height: 1.4; letter-spacing: -.03em; word-break: keep-all; }
.sv-study dl { margin: 0; }
.sv-study dl div { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: .5rem; padding: .55rem 0; border-top: 1px solid #e6ebe8; }
.sv-study dt { color: #7a847f; font-size: .72rem; }
.sv-study dd { margin: 0; color: var(--sv-ink); font-size: .8rem; line-height: 1.6; word-break: keep-all; }
.sv-study p { margin: auto 0 0 !important; padding-top: .9rem; color: var(--sv-deep) !important; font-size: .86rem !important; font-weight: 700; line-height: 1.5 !important; word-break: keep-all; }

/* 오늘 밤 확인할 것 */
.sv-check { display: grid; gap: .6rem; margin: 1.8rem 0 2rem; padding: 0; list-style: none; }
.sv-check li { display: grid; grid-template-columns: 2.4rem minmax(0, 1fr); gap: .9rem; align-items: start; padding: 1.05rem 1.15rem; border-radius: 16px; background: var(--sv-soft); }
.sv-check li > b { display: grid; width: 2.4rem; height: 2.4rem; place-items: center; border-radius: 50%; background: #fff; color: var(--sv-green); font-size: .8rem; font-weight: 800; }
.sv-check strong { display: block; margin-bottom: .2rem; color: var(--sv-deep); font-size: 1rem; line-height: 1.5; word-break: keep-all; }
.sv-check span { display: block; color: #4d5550; font-size: .88rem; line-height: 1.7; word-break: keep-all; }
.sv-check li.is-key { background: var(--sv-deep); }
.sv-check li.is-key strong { color: #fff; }
.sv-check li.is-key span { color: rgba(255, 255, 255, .8); }

/* FAQ */
.sv-faq { margin-top: 3.6rem; }
.sv-faq details { border-top: 1px solid var(--sv-line); }
.sv-faq details:last-child { border-bottom: 1px solid var(--sv-line); }
.sv-faq summary { position: relative; padding: 1.2rem 2.2rem 1.2rem 0; color: var(--sv-deep); font-size: 1rem; font-weight: 680; line-height: 1.55; cursor: pointer; list-style: none; word-break: keep-all; }
.sv-faq summary::-webkit-details-marker { display: none; }
.sv-faq summary::after { content: "+"; position: absolute; right: .2rem; top: 1.05rem; color: var(--sv-green); font-size: 1.3rem; font-weight: 400; }
.sv-faq details[open] summary::after { content: "−"; }
.sv-faq details p { margin: 0 0 1.3rem; font-size: .96rem; }

/* 참고자료 */
.sv-refs { margin-top: 3.4rem; padding: 1.6rem 1.7rem !important; border-radius: 18px; background: var(--sv-paper); }
.sv-refs h2 { margin: 0 0 1rem !important; font-size: 1.15rem !important; }
.sv-refs ol { margin: 0; padding-left: 1.2rem; }
.sv-refs li { margin: .65rem 0; color: #5d6661; font-size: .78rem; line-height: 1.65; word-break: break-word; scroll-margin-top: 110px; }
.sv-refs li a { color: var(--sv-teal); }

.sv-br-pc { display: inline; }

@media (max-width: 900px) {
  .sv-hero { width: calc(100% - 40px); }
  .sv-grid { grid-template-columns: 1fr 1fr; }
  .sv-layout { grid-template-columns: 1fr; padding-inline: 20px; }
  .sv-toc { position: static; padding: 1.2rem 1.3rem; border-radius: 16px; background: var(--sv-paper); }
  .sv-toc ol { border-left: 0; padding-left: 0; }
  .sv-studies { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .sv-header { padding: 64px 20px 28px; }
  .sv-br-pc { display: none; }
  .sv-hero { width: calc(100% - 24px); margin-bottom: 54px; padding: 1.6rem 1.2rem; border-radius: 22px; }
  .sv-grid { gap: .5rem; }
  .sv-grid a { min-height: 0; padding: .95rem .9rem; }
  .sv-grid strong { font-size: 1.02rem; }
  .sv-grid em { font-size: .74rem; }
  .sv-timeline__row { grid-template-columns: 70px minmax(0, 1fr); gap: .55rem; }
  .sv-timeline__axis { margin-left: calc(70px + .55rem); font-size: .64rem; }
  .sv-timeline__track { height: 34px; }
  .sv-timeline__track i b { font-size: .64rem; }
  .sv-odds li { grid-template-columns: 82px minmax(0, 1fr) 56px; gap: .5rem; }
  .sv-odds li > span { font-size: .74rem; }
  .sv-odds li > b { font-size: .76rem; }
  .sv-check li { padding: .95rem .9rem; gap: .7rem; }
  .sv-refs { padding: 1.3rem 1.2rem !important; }
}

@media (prefers-reduced-motion: reduce) {
  .sv-grid a { transition: none; }
  .sv-grid a:hover { transform: none; }
}

.sv-nw { white-space: nowrap; }