/* ============================================
   Developer Portfolio — Hyundai Card M Point inspired
   Black & White · Massive Typography · Scroll Motion
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter+Tight:wght@400;500;600;700;800;900&family=Archivo:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/static/pretendard.css');

:root {
  --bg: #ffffff;
  --fg: #000000;
  --muted: #555555; /* 7.5:1 on white (WCAG AAA) */
  --line: #e5e5e5;
  --line-dark: #c8c8c8;
  --grid: rgba(0, 0, 0, 0.04);
  --sans: 'Inter Tight', 'Pretendard', -apple-system, sans-serif;
  --display: 'Archivo', 'Inter Tight', 'Pretendard', sans-serif;
  --mono: 'JetBrains Mono', 'Pretendard', ui-monospace, monospace; /* 한글은 Pretendard로 */
}

* {
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-feature-settings: 'ss01', 'cv01';
  overflow-x: hidden;
}

body {
  font-size: 16px;
  line-height: 1.5;
}

::selection {
  background: #000;
  color: #fff;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

/* ====== Layout primitives ====== */
.container {
  width: 100%;
  max-width: 1680px;
  margin: 0 auto;
  padding: 0 64px;
}

@media (max-width: 768px) {
  .container { padding: 0 24px; }
}

.section {
  position: relative;
  padding: 160px 0;
  border-top: 1px solid var(--line);
}

@media (max-width: 768px) {
  .section { padding: 96px 0; }
}

/* ====== Nav ====== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 36px 64px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  mix-blend-mode: difference;
  color: #fff;
  pointer-events: none;
}

.nav > * { pointer-events: auto; }

.nav-logo {
  font-family: var(--display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 36px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.nav-links a {
  position: relative;
  padding: 4px 0;
  opacity: 0.85;
  transition: opacity 0.2s;
}

.nav-links a:hover { opacity: 1; }

.nav-time {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

@media (max-width: 768px) {
  .nav { padding: 16px 24px; }
  .nav-links { display: none; }
}

/* ====== Hero ====== */
.hero {
  min-height: 100vh;
  padding: 140px 0 80px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.hero-meta-top {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 24px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 60px;
}

.hero-meta-top .label {
  display: block;
  font-size: 10px;
  margin-bottom: 8px;
  opacity: 1;
}

.hero-meta-top .value {
  color: var(--fg);
  font-size: 12px;
}

.hero-display {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(64px, 13.5vw, 240px);
  line-height: 0.88;
  letter-spacing: -0.045em;
  margin: 0;
}

.hero-display .line {
  display: block;
  overflow: hidden;
  /* tight line-height clips descenders (g, p, y); pad inside, cancel outside so spacing is unchanged */
  padding-bottom: 0.14em;
  margin-bottom: -0.14em;
}

.hero-display .line-inner {
  display: inline-block;
  transform: translateY(110%);
  transition: transform 1.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.hero.revealed .hero-display .line-inner {
  transform: translateY(0);
}

.hero-display .line:nth-child(2) .line-inner { transition-delay: 0.12s; }
.hero-display .line:nth-child(3) .line-inner { transition-delay: 0.24s; }

.hero-display em {
  font-style: normal;
  font-weight: 400;
  font-family: var(--display);
}

.hero-bottom {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  align-items: end;
  margin-top: 80px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}

.hero-tagline {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(20px, 2vw, 30px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 480px;
}

.hero-mini-label {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 12px;
}

.hero-mini-value {
  font-family: var(--display);
  font-size: 16px;
  font-weight: 600;
}

@media (max-width: 768px) {
  .hero-meta-top { grid-template-columns: 1fr 1fr; gap: 16px; padding-bottom: 40px; }
  .hero-bottom { grid-template-columns: 1fr; gap: 24px; }
  .hero { min-height: 90vh; padding-top: 100px; }
}

/* Hero variant B: centered with side meta */
.hero[data-variant="b"] .hero-meta-top {
  grid-template-columns: 1fr;
  text-align: center;
  padding-bottom: 80px;
}
.hero[data-variant="b"] .hero-meta-top > div { display: inline-flex; gap: 8px; justify-content: center; }
.hero[data-variant="b"] .hero-meta-top .label { margin: 0; }
.hero[data-variant="b"] .hero-display { text-align: center; }
.hero[data-variant="b"] .hero-bottom { grid-template-columns: 1fr; text-align: center; }
.hero[data-variant="b"] .hero-tagline { margin: 0 auto; }

/* Hero variant C: full marquee */
.hero[data-variant="c"] .hero-display {
  font-size: clamp(80px, 18vw, 320px);
  white-space: nowrap;
}
.hero[data-variant="c"] .hero-marquee-row {
  display: flex;
  gap: 60px;
  animation: marquee 30s linear infinite;
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ====== Section header ====== */
.section-header {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 60px;
  margin-bottom: 100px;
  align-items: start;
  scroll-margin-top: 120px; /* clear the fixed nav on anchor jumps */
}
/* unrevealed headers sit 40px low (.reveal translateY), so the jump lands 40px short */
.section-header.reveal:not(.revealed) { scroll-margin-top: 160px; }

.section-index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-index::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--fg);
  border-radius: 50%;
}

.section-title {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(48px, 7vw, 120px);
  line-height: 0.9;
  letter-spacing: -0.04em;
  margin: 0;
}

@media (max-width: 768px) {
  .section-header { grid-template-columns: 1fr; gap: 24px; margin-bottom: 56px; }
}

/* ====== About ====== */
.about-content {
  display: grid;
  grid-template-columns: 200px 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about-lead {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(28px, 3.6vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin: 0;
}

.about-body {
  font-size: 16px;
  line-height: 1.7;
  color: #1a1a1a;
  max-width: 460px;
}

.about-body p { margin: 0 0 18px; }

.about-body p:last-child { margin: 0; }

.activity {
  display: grid;
  grid-template-columns: 48px 1fr 48px;
  gap: 24px;
  align-items: center;
}

.activity-arrow {
  width: 48px;
  height: 120px;
  border: 1px solid var(--fg);
  font-family: var(--mono);
  font-size: 18px;
  transition: background 0.2s, color 0.2s;
}

.activity-arrow:hover, .activity-arrow:focus-visible { background: var(--fg); color: var(--bg); }

.activity-stage { display: grid; align-items: center; }

.activity-stage > * {
  grid-area: 1 / 1;
  transition: opacity 0.5s ease, transform 0.5s ease, visibility 0.5s;
}

.activity-stage > .is-hidden { visibility: hidden; opacity: 0; transform: translateX(24px); }

.activity-slide {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.activity-photo {
  aspect-ratio: 4 / 3;
  background: #f2f2f2;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}

.activity-photo img { width: 100%; height: 100%; object-fit: cover; }

.activity-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(22px, 2.4vw, 32px);
  letter-spacing: -0.02em;
  margin: 12px 0 16px;
  word-break: keep-all;
}

.activity-text p { margin: 0 0 6px; font-size: 16px; line-height: 1.7; color: #1a1a1a; word-break: keep-all; }

@media (max-width: 768px) {
  .about-content { grid-template-columns: 1fr; gap: 32px; }
  .activity { grid-template-columns: 36px 1fr 36px; gap: 8px; }
  .activity-arrow { width: 36px; height: 80px; }
  .activity-slide { grid-template-columns: 1fr; gap: 20px; }
}

/* ====== Skills ====== */
.skills-list {
  display: flex;
  flex-direction: column;
}

.skill-row {
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr) minmax(0, 1.3fr);
  gap: 40px;
  align-items: center;
  padding: 28px 0;
  border-top: 1px solid var(--line);
  position: relative;
  cursor: default;
  transition: padding 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.skill-row:last-child { border-bottom: 1px solid var(--line); }

.skill-row::before {
  content: '';
  position: absolute;
  inset: 0;
  background: #000;
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.5s cubic-bezier(0.7, 0, 0.2, 1);
  z-index: -1;
}

.skill-row:hover::before { transform: scaleX(1); }
.skill-row:hover { color: #fff; padding-left: 32px; padding-right: 32px; }
.skill-row:hover .skill-cat { color: rgba(255,255,255,0.6); }
.skill-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.skill-name {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(32px, 4vw, 64px);
  line-height: 1;
  letter-spacing: -0.035em;
}

.skill-cat {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color 0.3s;
}

@media (max-width: 768px) {
  .skill-row { grid-template-columns: 40px 1fr; gap: 16px; padding: 20px 0; }
  .skill-items { grid-column: 2; justify-content: flex-start; }
  .skill-row:hover { padding-left: 16px; padding-right: 16px; }
}

/* ====== Awards ====== */
.awards-list {
  display: flex;
  flex-direction: column;
}

.award-row {
  display: grid;
  grid-template-columns: 60px 100px 1fr auto;
  gap: 40px;
  align-items: center;
  padding: 32px 0;
  border-top: 1px solid var(--line);
  position: relative;
  cursor: default;
  transition: padding 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.awards-list .award-row:last-child { border-bottom: 1px solid var(--line); }

.award-row::before {
  content: '';
  position: absolute;
  inset: 0;
  background: #000;
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.5s cubic-bezier(0.7, 0, 0.2, 1);
  z-index: -1;
}

.award-row:hover::before { transform: scaleX(1); }
.award-row:hover { color: #fff; padding-left: 32px; padding-right: 32px; }
.award-row:hover .award-year,
.award-row:hover .award-num { color: rgba(255,255,255,0.6); }

.award-row:hover .award-prize {
  border-color: rgba(255,255,255,0.4);
}
.award-row:hover .award-prize[data-tier="gold"] {
  background: #fff;
  color: #000;
}

.award-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.award-year {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.award-title {
  font-family: var(--display);
  font-weight: 600;
  font-size: clamp(20px, 2.2vw, 32px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.award-prize {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 6px 12px;
  border: 1px solid var(--fg);
  white-space: nowrap;
}

.award-prize[data-tier="gold"] {
  background: var(--fg);
  color: var(--bg);
}

@media (max-width: 768px) {
  .award-row {
    grid-template-columns: 40px 1fr;
    gap: 12px 16px;
    padding: 20px 0;
  }
  .award-year { grid-column: 2; font-size: 12px; color: var(--muted); }
  .award-title { grid-column: 2; }
  .award-prize { grid-column: 2; justify-self: start; }
}

/* ====== Projects ====== */
.projects-list .project-row {
  display: grid;
  grid-template-columns: 60px 1fr 1fr 1fr auto;
  gap: 40px;
  align-items: center;
  padding: 36px 0;
  border-top: 1px solid var(--line);
  cursor: pointer;
  position: relative;
  transition: padding 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.projects-list .project-row:last-child { border-bottom: 1px solid var(--line); }

.projects-list .project-row::before {
  content: '';
  position: absolute;
  inset: 0;
  background: #000;
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 0.5s cubic-bezier(0.7, 0, 0.2, 1);
  z-index: -1;
}

.projects-list .project-row:hover::before { transform: scaleX(1); }
.projects-list .project-row:hover { color: #fff; padding-left: 32px; padding-right: 32px; }
.projects-list .project-row:hover .project-meta { color: rgba(255,255,255,0.6); }
.projects-list .project-row:hover .project-arrow { transform: translateX(8px) rotate(-45deg); }

.project-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.project-name {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(28px, 3.4vw, 56px);
  line-height: 1;
  letter-spacing: -0.035em;
}

.project-meta {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  transition: color 0.3s;
}

.project-meta .label {
  display: block;
  font-size: 9px;
  opacity: 1;
  margin-bottom: 4px;
}

.project-arrow {
  font-family: var(--display);
  font-size: 24px;
  font-weight: 400;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
  display: inline-block;
}

@media (max-width: 768px) {
  .projects-list .project-row {
    grid-template-columns: 40px 1fr auto;
    gap: 12px 16px;
    padding: 24px 0;
  }
  .project-meta:nth-of-type(2),
  .project-meta:nth-of-type(3) { display: none; }
  .projects-list .project-row:hover { padding-left: 16px; padding-right: 16px; }
}

/* Projects slider variant */
.projects-header-wrapper {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 100px;
}

.projects-header-wrapper .section-header {
  margin-bottom: 0;
}

.slider-nav {
  display: flex;
  gap: 16px;
}

.slider-btn {
  width: 56px;
  height: 56px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--display);
  font-size: 24px;
  transition: all 0.3s;
  background: transparent;
  color: var(--fg);
}

.slider-btn:not(:disabled):hover {
  background: var(--fg);
  color: var(--bg);
}

.slider-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.projects-slider {
  overflow: hidden;
  position: relative;
  width: 100%;
  --cards: 3;
  --gap: 40px;
}
@media (max-width: 1024px) {
  .projects-slider { --cards: 2; }
}
@media (max-width: 768px) {
  .projects-slider { --cards: 1; --gap: 20px; }
}

.projects-slider-track {
  display: flex;
  gap: var(--gap);
  width: 100%;
}

.project-slide {
  flex: 0 0 calc((100% - (var(--cards) - 1) * var(--gap)) / var(--cards));
  transform: translateX(calc(var(--current-slide, 0) * -1 * (100% + var(--gap))));
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.project-card {
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.project-card-image {
  aspect-ratio: 16 / 9;
  background:
    repeating-linear-gradient(135deg,
      #f4f4f4 0px,
      #f4f4f4 8px,
      #ececec 8px,
      #ececec 16px);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  position: relative;
  overflow: hidden;
  transition: transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.project-card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.3s;
}

.project-card-img[src]:not([src=""]) {
  opacity: 1;
}

.project-card:hover .project-card-image { transform: scale(1.02); }

.project-card-image::before {
  content: '[ ' attr(data-placeholder) ' ]';
  background: rgba(255,255,255,0.8);
  padding: 6px 12px;
}

.project-card-num {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
  display: flex;
  justify-content: space-between;
}

.project-card-name {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(28px, 3vw, 44px);
  line-height: 1;
  letter-spacing: -0.035em;
  margin: 0;
}

.project-card-desc {
  font-size: 14px;
  line-height: 1.55;
  color: #555;
  max-width: 480px;
}

.project-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.project-card-tag {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 5px 10px;
  border: 1px solid var(--line-dark);
  color: #333;
}

@media (max-width: 768px) {
  .projects-header-wrapper {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
    margin-bottom: 56px;
  }
}

/* ====== Marquee strip ====== */
.marquee-strip {
  padding: 40px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  white-space: nowrap;
}

.marquee-track {
  display: inline-flex;
  gap: 60px;
  animation: marquee 40s linear infinite;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(40px, 6vw, 100px);
  letter-spacing: -0.035em;
  line-height: 1;
}

.marquee-track span {
  display: inline-flex;
  align-items: center;
  gap: 60px;
}

.marquee-track .dot {
  width: 14px;
  height: 14px;
  background: var(--fg);
  border-radius: 50%;
  display: inline-block;
}

/* ====== Contact ====== */
.contact {
  padding: 200px 0 120px;
  border-top: 1px solid var(--line);
}

.contact-label {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 40px;
}

.contact-email {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(22px, 6vw, 104px);
  line-height: 0.9;
  letter-spacing: -0.045em;
  display: inline-block;
  position: relative;
  margin: 0;
}

.contact-email .underline {
  display: block;
  height: 2px;
  background: var(--fg);
  margin-top: 12px;
  transform-origin: left;
  transform: scaleX(0);
  transition: transform 1s cubic-bezier(0.7, 0, 0.2, 1);
}

.contact.revealed .contact-email .underline { transform: scaleX(1); }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  margin-top: 120px;
  padding-top: 40px;
  border-top: 1px solid var(--line);
}

.contact-grid .label {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 12px;
}

.contact-grid .value {
  font-family: var(--display);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
}

.contact-grid a.value {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.contact-grid a.value:hover { border-color: var(--fg); }

@media (max-width: 768px) {
  .contact { padding: 96px 0 64px; }
  .contact-grid { grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 60px; }
}
@media (max-width: 480px) {
  .contact-grid { grid-template-columns: 1fr; }
  .contact-grid .value { overflow-wrap: anywhere; min-width: 0; }
}

/* ====== Footer ====== */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.06em;
}

@media (max-width: 768px) {
  .footer { flex-direction: column; gap: 8px; align-items: flex-start; }
}

/* ====== Reveal animation ====== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.9s cubic-bezier(0.2, 0.8, 0.2, 1),
              transform 0.9s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.2, 0.8, 0.2, 1),
              transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reveal-stagger.revealed > * {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger.revealed > *:nth-child(1) { transition-delay: 0.05s; }
.reveal-stagger.revealed > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger.revealed > *:nth-child(3) { transition-delay: 0.15s; }
.reveal-stagger.revealed > *:nth-child(4) { transition-delay: 0.2s; }
.reveal-stagger.revealed > *:nth-child(5) { transition-delay: 0.25s; }
.reveal-stagger.revealed > *:nth-child(6) { transition-delay: 0.3s; }
.reveal-stagger.revealed > *:nth-child(7) { transition-delay: 0.35s; }

/* Word reveal */
.word-reveal {
  display: inline-block;
  overflow: hidden;
  vertical-align: bottom;
}

.word-reveal > span {
  display: inline-block;
  transform: translateY(110%);
  transition: transform 0.9s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.revealed .word-reveal > span,
.word-reveal.revealed > span {
  transform: translateY(0);
}

/* Scroll progress */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--fg);
  z-index: 200;
  width: 0;
  transition: width 0.1s linear;
}

/* Cursor follower */
.cursor-dot {
  position: fixed;
  top: 0;
  left: 0;
  width: 8px;
  height: 8px;
  background: var(--fg);
  border-radius: 50%;
  pointer-events: none;
  z-index: 999;
  transform: translate(-50%, -50%);
  mix-blend-mode: difference;
  transition: width 0.2s, height 0.2s;
}

.cursor-dot.dot-large {
  width: 60px;
  height: 60px;
  background: #fff;
}

@media (max-width: 1024px) {
  .cursor-dot { display: none; }
}

/* ====== Modal ====== */
.project-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  animation: modalFadeIn 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.project-modal-content {
  background: var(--bg);
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  animation: modalSlideUp 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.project-modal-close {
  position: absolute;
  top: 24px;
  right: 24px;
  font-family: var(--display);
  font-size: 32px;
  line-height: 1;
  color: var(--muted);
  transition: color 0.2s;
  z-index: 10;
}

.project-modal-close:hover {
  color: var(--fg);
}

.project-modal-header {
  padding: 48px 48px 32px;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 5;
}

.project-modal-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(24px, 3vw, 40px);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
  padding-right: 40px;
}

.project-modal-meta {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  display: flex;
  gap: 12px;
}

.project-modal-body {
  padding: 48px;
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.modal-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.modal-section-title {
  font-family: var(--display);
  font-weight: 600;
  font-size: 20px;
  letter-spacing: -0.02em;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 12px;
}

.modal-section-title::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--fg);
}

.modal-section-text {
  font-size: 15px;
  line-height: 1.6;
  color: #333;
  margin: 0;
  white-space: pre-wrap;
}

@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalSlideUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
  .project-modal-backdrop { padding: 16px; }
  .project-modal-header { padding: 32px 24px 24px; }
  .project-modal-body { padding: 32px 24px; gap: 32px; }
}

/* ============================================
   v.02 — Profile-first hero & feedback pass
   ============================================ */

/* ====== Buttons ====== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border: 1px solid var(--fg);
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1;
  white-space: nowrap;
  transition: background 0.25s, color 0.25s;
}
.btn:hover { background: var(--fg); color: var(--bg); }
.btn-primary { background: var(--fg); color: var(--bg); }
.btn-primary:hover { background: var(--bg); color: var(--fg); }
.btn-sm { padding: 10px 16px; font-size: 13px; }

:focus-visible {
  outline: 2px solid var(--fg);
  outline-offset: 3px;
}
.nav :focus-visible { outline-color: #fff; }

/* ====== Hero (profile-first) ====== */
.hero-profile-first {
  min-height: 100vh;
  min-height: 100svh;
  padding: 104px 0 56px;
  justify-content: flex-start;
}

.hero-profile-first .hero-inner {
  display: flex;
  flex-direction: column;
  flex: 1;
}


.hero-main {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(300px, 1fr);
  gap: 72px;
  align-items: end;
  align-content: center;
  padding-top: 48px;
}

.hero-kicker {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 0 0 16px;
}

.hero-name {
  font-size: clamp(56px, 10.5vw, 188px);
  line-height: 0.9;
  overflow-wrap: anywhere;
}

.hero-name .hero-role {
  font-size: 0.36em;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-top: 0.2em;
}

.hero-stack {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 12px 0 0;
}

.hero-intro {
  font-family: var(--display);
  font-weight: 500;
  font-size: clamp(18px, 1.6vw, 24px);
  line-height: 1.45;
  letter-spacing: -0.015em;
  max-width: 600px;
  margin: 32px 0 36px;
  word-break: keep-all;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-side {
  border-top: 2px solid var(--fg);
}

.hero-profile { margin: 0; }

.hero-profile-row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.hero-profile dt {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.hero-profile dd {
  margin: 0;
  font-family: var(--display);
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
}

.hero-profile dd a {
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
.hero-profile dd a:hover { border-color: var(--fg); }

.hero-stats {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: 28px;
}

.hero-stats li { display: flex; flex-direction: column; gap: 8px; min-width: 0; }

.hero-stat-num {
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(32px, 3vw, 48px);
  line-height: 1;
  letter-spacing: -0.04em;
}

.hero-stat-label {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  line-height: 1.4;
}

/* hero reveal for non-display parts */
.hero-profile-first .hero-kicker,
.hero-profile-first .hero-intro,
.hero-profile-first .hero-actions,
.hero-profile-first .hero-side {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.9s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.9s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.hero-profile-first.revealed .hero-kicker,
.hero-profile-first.revealed .hero-intro,
.hero-profile-first.revealed .hero-actions,
.hero-profile-first.revealed .hero-side { opacity: 1; transform: none; }
.hero-profile-first.revealed .hero-intro { transition-delay: 0.3s; }
.hero-profile-first.revealed .hero-actions { transition-delay: 0.4s; }
.hero-profile-first.revealed .hero-side { transition-delay: 0.5s; }

/* variants b / c share intro + actions */
.hero[data-variant="b"] .hero-actions { justify-content: center; }
.hero[data-variant="b"] .hero-intro { margin: 0 auto 28px; }
.hero[data-variant="c"] .hero-bottom { grid-template-columns: 1.2fr 1fr auto; }
.hero[data-variant="c"] .hero-intro { margin: 0; }

@media (max-width: 1024px) {
  .hero-main { grid-template-columns: 1fr; gap: 48px; align-items: start; }
}

@media (max-width: 768px) {
  .hero-profile-first { padding: 88px 0 48px; }
  .hero-main { padding-top: 32px; gap: 40px; }
  .hero-intro { margin: 24px 0 28px; }
  .hero-actions .btn { flex: 1 1 auto; justify-content: center; }
  .hero-stats { grid-template-columns: auto auto; gap: 20px 28px; }
  .hero-stats li:last-child { grid-column: 1 / -1; }
  .hero[data-variant="c"] .hero-bottom { grid-template-columns: 1fr; }
}

/* ====== Tech stack chips ====== */
.skill-items {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.skill-chip {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  padding: 7px 12px;
  border: 1px solid var(--line-dark);
  transition: border-color 0.3s;
}

.skill-row:hover .skill-chip { border-color: rgba(255, 255, 255, 0.4); }

/* ====== Awards → project link ====== */
.award-project {
  display: block;
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.award-row:hover .award-project { color: rgba(255, 255, 255, 0.6); }

/* ====== Projects as buttons (keyboard accessible) ====== */
button.project-row,
button.project-card {
  width: 100%;
  text-align: left;
  font: inherit;
  color: inherit;
  padding-left: 0;
  padding-right: 0;
}
button.project-card { padding: 0; }

/* ====== Modal extras ====== */
.project-modal-team {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  margin: 14px 0 0;
  font-size: 14px;
  color: #333;
}

.project-modal-links {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.modal-figure { margin: 0; border: 1px solid var(--line); }
.modal-figure img { display: block; width: 100%; height: auto; }

.modal-metrics {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 24px;
}
.modal-metrics li { display: flex; flex-direction: column; gap: 8px; border-top: 2px solid var(--fg); padding-top: 14px; }
.modal-metric-value { font-family: var(--display); font-weight: 800; font-size: 32px; letter-spacing: -0.03em; line-height: 1; }
.modal-metric-label { font-family: var(--mono); font-size: 11px; color: var(--muted); letter-spacing: 0.04em; }

/* ====== Reduced motion (피드백 16) ====== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    transition-delay: 0s !important;
    scroll-behavior: auto !important;
  }
  .marquee-track,
  .hero[data-variant="c"] .hero-marquee-row { animation: none !important; transform: none !important; }
  .cursor-dot { display: none; }
}

html { scroll-behavior: smooth; }

/* Korean titles: break between words, not inside them */
.project-name, .project-card-name, .project-modal-title, .award-title, .about-lead, .modal-section-text, .project-card-desc { word-break: keep-all; }

/* ====== v.02.1 — Profile card on the right, stats moved below ====== */
.hero-card-head {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: 24px 0 20px;
  border-bottom: 1px solid var(--line);
}

.hero-photo {
  width: 112px;
  aspect-ratio: 1792 / 2345; /* Jobpic.png(1792x2398) 비율에서 아래 ~5px 가림 — 사진 바꾸면 같이 수정 */
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    repeating-linear-gradient(135deg, #f4f4f4 0px, #f4f4f4 8px, #ececec 8px, #ececec 16px);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-photo:has(img) { align-items: flex-start; }

.hero-photo img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.hero-photo-fallback {
  font-family: var(--display);
  font-weight: 800;
  font-size: 36px;
  letter-spacing: -0.04em;
  background: rgba(255, 255, 255, 0.85);
  padding: 4px 10px;
}

.hero-card-text p { margin: 0; }

.hero-card-name {
  font-family: var(--display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hero-card-role {
  font-family: var(--mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-top: 8px !important;
}

.hero-card-bio {
  font-size: 14px;
  line-height: 1.55;
  color: #333;
  margin-top: 12px !important;
  word-break: keep-all;
}

/* compact contact rows inside the card */
.hero-card .hero-profile-row { padding: 9px 0; grid-template-columns: 76px minmax(0, 1fr); }
.hero-card .hero-profile dd { font-size: 13px; font-weight: 500; }

/* stats strip below the hero */
.hero-foot {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 40px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.9s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.9s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.hero-profile-first.revealed .hero-foot { opacity: 1; transform: none; transition-delay: 0.6s; }
.hero-foot .hero-stats { margin: 0; gap: 40px; }

.hero-badges { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 6px; max-width: 720px; }
.hero-badges li {
  padding: 7px 12px;
  background: var(--fg);
  color: var(--bg);
  border: 1px solid var(--fg);
  font-family: var(--display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: background 0.2s, color 0.2s;
}
.hero-badges li:hover { background: var(--bg); color: var(--fg); }

.hero-foot-stack { display: flex; flex-direction: column; gap: 8px; text-align: right; }
.hero-foot-value { font-family: var(--display); font-size: 16px; font-weight: 600; }

@media (max-width: 768px) {
  .hero-card-head { grid-template-columns: 88px minmax(0, 1fr); gap: 16px; }
  .hero-photo { width: 88px; }
  .hero-foot { flex-direction: column; align-items: flex-start; gap: 24px; margin-top: 40px; }
  .hero-foot-stack { text-align: left; }
  .hero-badges { justify-content: flex-start; }
}

/* long email must wrap on small screens */
.contact-email { overflow-wrap: anywhere; }

/* ====== v.02.2 — smaller name, larger profile card ====== */
.hero-main { grid-template-columns: minmax(0, 1fr) minmax(400px, 1fr); gap: 64px; }
.hero-name { font-size: clamp(48px, 7.2vw, 132px); }
.hero-card-head { grid-template-columns: 200px minmax(0, 1fr); gap: 32px; padding: 20px 0; }
.hero-photo { width: 200px; }
.hero-photo-fallback { font-size: 52px; }
.hero-card-name { font-size: clamp(30px, 2.8vw, 44px); }
.hero-card-role { font-size: 11px; margin-top: 10px !important; }
.hero-card-bio { font-size: 17px; line-height: 1.6; margin-top: 16px !important; }
.hero-card .hero-profile-row { padding: 10px 0; grid-template-columns: 104px minmax(0, 1fr); }
.hero-card .hero-profile dt { font-size: 12px; }
.hero-card .hero-profile dd { font-size: 16px; font-weight: 500; }

@media (max-width: 768px) {
  .hero-name { font-size: clamp(48px, 15vw, 72px); }
  .hero-card-head { grid-template-columns: 112px minmax(0, 1fr); gap: 18px; }
  .hero-photo { width: 112px; }
  .hero-card-name { font-size: 24px; }
  .hero-card-bio { font-size: 14px; }
  .hero-card .hero-profile-row { grid-template-columns: 84px minmax(0, 1fr); }
}
@media (max-width: 1024px) {
  .hero-main { grid-template-columns: 1fr; gap: 48px; }
}

/* ====== v.02.3 — feedback fixes ====== */
/* card: stack focus replaces repeated name */
.hero-card-text .hero-card-role { margin: 0 0 10px !important; }
.hero-card-name { font-size: clamp(30px, 2.6vw, 40px); }
.hero-card-name-en { font-size: clamp(18px, 1.5vw, 22px); letter-spacing: 0.02em; margin-top: 6px !important; }

/* list rows: summary + tags (14, 15) */
.projects-list .project-row { grid-template-columns: 60px minmax(0, 2.2fr) minmax(0, 1fr) auto; }
.project-main { display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.projects-list .project-name { font-size: clamp(26px, 2.8vw, 44px); line-height: 1.05; }
.project-desc { font-size: 16px; line-height: 1.6; color: #444; max-width: 640px; word-break: keep-all; transition: color 0.3s; }
.project-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.projects-list .project-row:hover .project-desc { color: rgba(255, 255, 255, 0.75); }
.projects-list .project-row:hover .project-card-tag { color: #fff; border-color: rgba(255, 255, 255, 0.4); }

@media (max-width: 768px) {
  .projects-list .project-row { grid-template-columns: 40px minmax(0, 1fr) auto; }
  .projects-list .project-row .project-meta { display: none; }
}

/* mobile menu (85, 87) */
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  position: relative;
  color: inherit;
}
.nav-toggle span {
  position: absolute;
  left: 9px;
  right: 9px;
  height: 2px;
  background: currentColor;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), top 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.nav-toggle span:first-child { top: 15px; }
.nav-toggle span:last-child { top: 23px; }
.nav-toggle.is-open span:first-child { top: 19px; transform: rotate(45deg); }
.nav-toggle.is-open span:last-child { top: 19px; transform: rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: var(--fg);
  color: var(--bg);
  padding: 96px 24px 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.4s cubic-bezier(0.2, 0.8, 0.2, 1), visibility 0s linear 0.4s;
}
.mobile-menu.is-open { visibility: visible; opacity: 1; transition-delay: 0s; }

.mobile-menu ul { list-style: none; margin: 0; padding: 0; }
.mobile-menu li {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.mobile-menu.is-open li { opacity: 1; transform: none; }
.mobile-menu-num { font-family: var(--mono); font-size: 11px; color: rgba(255, 255, 255, 0.7); }
.mobile-menu li a {
  font-family: var(--display);
  font-weight: 800;
  font-size: 44px;
  line-height: 1;
  letter-spacing: -0.04em;
}
.mobile-menu-foot {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.75);
}
.mobile-menu :focus-visible { outline-color: #fff; }

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-time { display: none; }
}
@media (min-width: 769px) {
  .mobile-menu { display: none; }
}

/* ====== v.02.4 — hero fits in one screen: name aligned top, stats pulled up ====== */
@media (min-width: 1025px) {
  .hero-profile-first { padding-top: 88px; }
  .hero-main { align-items: start; padding-top: 24px; }
  .hero-foot { margin-top: 24px; padding-top: 20px; }
}

/* ====== v.02.5 — feedback round 3 ====== */
/* 1. solid nav so scrolled content doesn't collide with menu text */
.nav {
  mix-blend-mode: normal;
  color: var(--fg);
  background: rgba(255, 255, 255, 0.88);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  padding-top: 24px;
  padding-bottom: 20px;
}
.nav :focus-visible { outline-color: var(--fg); }
.nav.menu-open { background: transparent; color: #fff; border-bottom-color: transparent; -webkit-backdrop-filter: none; backdrop-filter: none; }
.nav.menu-open :focus-visible { outline-color: #fff; }
@media (max-width: 768px) { .nav { padding-top: 12px; padding-bottom: 12px; } }
/* align nav edges with .container content (max-width 1680px + 64px padding) */
@media (min-width: 769px) { .nav { padding-left: max(64px, calc((100% - 1680px) / 2 + 64px)); padding-right: max(64px, calc((100% - 1680px) / 2 + 64px)); } }

/* 2. minimum 12px for small mono labels */
.hero-meta-top .label, .hero-mini-label, .skill-cat, .award-prize, .project-meta, .project-meta .label,
.project-card-num, .project-card-tag, .contact-grid .label, .footer, .project-modal-meta,
.hero-profile dt, .hero-card .hero-profile dt, .hero-stat-label, .award-project, .modal-metric-label,
.hero-card-role, .mobile-menu-num { font-size: 12px; }

.skill-items { justify-content: flex-start; }
@media (min-width: 769px) {
  /* 3. chips start right after the category column instead of the far edge */
  .skill-row { grid-template-columns: 60px minmax(0, 360px) minmax(0, 1fr); }
  /* 4. tighter section endings */
  .section { padding-bottom: 104px; }
}

/* keep "Recognition🏆." on one line on phones: shrink with viewport instead of wrapping the emoji */
#awards .section-title { white-space: nowrap; font-size: min(clamp(48px, 7vw, 120px), 11.5vw); }