/* 기본 */
:root {
  --paper: #efeeea;
  --ink: #121212;
  --ink-soft: #6b6660;
  --line: #dbd8d1;
  --steel: #18181b;
  --navy: #17265e;
  --heat: #c2401c;
  --ember: #e8761a;

  --page: min(100% - 2.5rem, 84rem);
  --rail: 1.5rem;

  --t-display: clamp(4.5rem, 24vw, 10rem);
  --t-lead: clamp(1.625rem, 6.5vw, 2.5rem);
  --t-year: clamp(2.5rem, 11vw, 3.5rem);
  --t-email: clamp(1.875rem, 7vw, 2.75rem);
  --t-title: clamp(1.5rem, 5.6vw, 1.875rem);
  --t-num: clamp(1.75rem, 5vw, 2.25rem);
  --t-prose: clamp(1.1875rem, 4.6vw, 1.4375rem);
  --t-body: 1.0625rem;
  --t-label: 0.75rem;

  color-scheme: light;
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: 'Pretendard Variable', Pretendard, system-ui, -apple-system, 'Apple SD Gothic Neo', 'Malgun Gothic', sans-serif;
  font-size: var(--t-body);
  font-weight: 400;
  line-height: 1.5;
  word-break: keep-all;
}

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

a { color: inherit; }

/* 어두운 강철 위에서는 주황을 한 단 밝게 써야 읽힌다 */
.ember { color: var(--ember); }

:focus-visible { outline: 2px solid var(--ember); outline-offset: 4px; }

/* 히어로 : 달궈진 강철 */
.forge {
  position: relative;
  display: flex;
  align-items: flex-start;
  min-height: 100svh;
  overflow: hidden;
  background: var(--steel);
  color: var(--paper);
  touch-action: pan-y;
}

.forge-canvas,
.forge-veil {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* 쇠가 밝게 달아도 글자가 읽히도록 */
.forge-veil {
  background:
    linear-gradient(to bottom,
      rgba(18, 18, 21, 0.9) 0%,
      rgba(18, 18, 21, 0.72) 24%,
      rgba(18, 18, 21, 0.12) 58%,
      rgba(18, 18, 21, 0.04) 100%);
  pointer-events: none;
}

.forge-text {
  position: relative;
  z-index: 1;
  width: var(--page);
  margin-inline: auto;
  padding-block: clamp(3rem, 8vw, 5rem);
  pointer-events: none;
}

.forge-role {
  color: rgba(239, 238, 234, 0.95);
  font-size: clamp(0.9375rem, 3.6vw, 1.1875rem);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.forge-role i {
  margin-inline: 0.45em;
  color: var(--ember);
  font-size: 0.72em;
  font-style: normal;
  vertical-align: 0.12em;
}

.forge-name {
  margin-top: clamp(0.875rem, 2.5vw, 1.25rem);
  text-indent: -0.045em;
  font-size: var(--t-display);
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 0.86;
}

.forge-line {
  margin-top: clamp(1rem, 2.5vw, 1.375rem);
  color: rgba(239, 238, 234, 0.88);
  font-size: var(--t-lead);
  font-weight: 500;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

/* 섹션 */
.section {
  width: var(--page);
  margin-inline: auto;
  padding-block: clamp(3.5rem, 7vw, 5.5rem);
}

.section + .section { border-top: 1px solid var(--line); }

.section-head {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: clamp(2rem, 4vw, 2.75rem);
}

.section-head h2 {
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.rule {
  flex: 1;
  height: 1px;
  background: var(--line);
}

.count {
  color: var(--ink-soft);
  font-size: var(--t-label);
  font-weight: 600;
  letter-spacing: 0.08em;
  font-variant-numeric: tabular-nums;
}

/* 소개 */
.lede {
  max-width: 36em;
  font-size: var(--t-prose);
  line-height: 1.7;
  letter-spacing: -0.015em;
}

.lede:has(.todo) { color: var(--ink-soft); }

.todo {
  display: inline-block;
  margin-right: 0.5rem;
  padding: 0.15rem 0.45rem;
  background: var(--heat);
  color: var(--paper);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  vertical-align: 0.15em;
}

/* 타임라인 */
.timeline {
  position: relative;
  padding-left: var(--rail);
}

/* 최근은 뜨겁고 내려갈수록 식는다 */
.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 1px;
  background: linear-gradient(var(--ember), var(--heat) 22%, var(--navy) 60%, var(--line));
}

.year-group + .year-group { margin-top: clamp(3rem, 7vw, 4.5rem); }

.year {
  position: relative;
  text-indent: -0.035em;
  color: var(--navy);
  font-size: var(--t-year);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.year::before {
  content: '';
  position: absolute;
  top: 0.36em;
  left: calc(var(--rail) * -1 - 3px);
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--navy);
}

.year-group:first-child .year::before { background: var(--ember); }

.cards { margin-top: clamp(1.25rem, 3vw, 1.75rem); }

.card + .card { margin-top: clamp(2.5rem, 6vw, 3rem); }

/* 사진 없는 카드는 짧은 막대로 시작을 표시한다 */
.card--text::before {
  content: '';
  display: block;
  width: 2.25rem;
  height: 2px;
  margin-bottom: 1rem;
  background: var(--heat);
}

.card-image {
  width: 100%;
  height: auto;
  max-height: 60svh;
  margin-bottom: 1rem;
  background: var(--line);
  object-fit: contain;
}

.card-title {
  text-indent: -0.025em;
  font-size: var(--t-title);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.15;
}

.card-summary {
  margin-top: 0.5rem;
  color: var(--ink-soft);
  line-height: 1.65;
}

.card-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.125rem;
  margin-top: 1rem;
  list-style: none;
  color: var(--ink-soft);
  font-size: var(--t-label);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.card-link {
  display: inline-block;
  margin-top: 1rem;
  color: var(--heat);
  font-size: var(--t-label);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.4em;
}

.card-link span {
  display: inline-block;
  transition: transform 0.3s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.card-link:hover span { transform: translate(3px, -3px); }

.notice { color: var(--ink-soft); }

/* 자격 */
.records { display: grid; gap: clamp(2.5rem, 6vw, 4rem); }

.record-kind {
  margin-bottom: 1.25rem;
  color: var(--ink-soft);
  font-size: var(--t-label);
  font-weight: 600;
  letter-spacing: 0.16em;
}

.record-certs { list-style: none; }

.record-certs li {
  padding-block: 0.625rem;
  border-top: 1px solid var(--line);
  font-size: var(--t-title);
  font-weight: 700;
  letter-spacing: -0.035em;
}

/* 아직 실기가 남은 것은 단계를 같이 적는다 */
.stage {
  margin-left: 0.5rem;
  color: var(--ink-soft);
  font-size: var(--t-label);
  font-weight: 600;
  letter-spacing: 0.04em;
  vertical-align: 0.18em;
}

/* 등수·기관처럼 알맹이가 되는 말만 강조한다 */
.record-certs em {
  color: var(--heat);
  font-style: normal;
}

.record-stats { margin-top: 1.75rem; }

.record-stats div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.625rem;
  border-top: 1px solid var(--line);
}

.record-stats dt { color: var(--ink-soft); }

.num {
  color: var(--heat);
  font-size: var(--t-num);
  font-weight: 800;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}

.record-school {
  margin-top: 1.5rem;
  color: var(--ink-soft);
}

/* 연락처 */
.email {
  display: inline-block;
  text-indent: -0.03em;
  color: var(--navy);
  font-size: var(--t-email);
  font-weight: 700;
  letter-spacing: -0.045em;
  text-decoration-color: rgba(23, 38, 94, 0.25);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
  transition: color 0.3s ease;
}

.email:hover {
  color: var(--heat);
  text-decoration-color: currentColor;
}

.contact-note {
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
  color: var(--ink-soft);
}

/* 푸터 */
.footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  width: var(--page);
  margin-inline: auto;
  padding-block: 1.75rem 2.25rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: var(--t-label);
  font-weight: 600;
  letter-spacing: 0.08em;
}

@media (min-width: 56rem) {
  :root { --rail: 2rem; }

  .year-group {
    display: grid;
    grid-template-columns: 9rem minmax(0, 1fr);
    gap: 2.75rem;
  }

  /* 카드가 지나가는 동안 연도가 레일을 따라 내려온다 */
  .year {
    position: sticky;
    top: 2.5rem;
    align-self: start;
  }

  .cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(2.5rem, 4vw, 3.5rem) clamp(2rem, 3vw, 3rem);
    margin-top: 0.25rem;
  }

  .card + .card { margin-top: 0; }

  .records { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

/* 애니메이션 */
@media (prefers-reduced-motion: no-preference) {
  .forge-role,
  .forge-name,
  .forge-line {
    opacity: 0;
    animation: rise 0.5s cubic-bezier(0.2, 0.7, 0.2, 1) forwards;
  }
  .forge-name { animation-delay: 0.04s; }
  .forge-line { animation-delay: 0.14s; }
  .forge-role { animation-delay: 0.24s; }

  .js .reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
  }
  .js .reveal.is-visible { opacity: 1; transform: none; }
}

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}