/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --ink-950: #14252c;
  --ink-820: #29444d;
  --ink-700: #4a646d;
  --ink-580: #4a646d; /* WCAG AA: 기존 #677d85는 4.06:1로 미달 → 5.9:1로 darken */
  --paper: #fbf7f0;
  --paper-strong: #fffdf9;
  --paper-soft: rgba(255, 253, 249, 0.78);
  --mist: #edf3ef;
  --mist-strong: #ddebe4;
  --accent: #177565;
  --accent-strong: #0f5a4e;
  --accent-soft: #d7eee7;
  --warm: #bf6e48;
  --warm-soft: #f6e5db;
  --line: rgba(20, 37, 44, 0.12);
  --line-strong: rgba(20, 37, 44, 0.2);
  --shadow-lg: 0 28px 80px rgba(20, 37, 44, 0.14);
  --shadow-md: 0 16px 40px rgba(20, 37, 44, 0.1);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --content-width: 1160px;
  --page-width: 960px;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  position: relative;
  display: flex;
  flex-direction: column;
  color: var(--ink-950);
  background:
    radial-gradient(circle at top left, rgba(23, 117, 101, 0.14), transparent 34%),
    radial-gradient(circle at 85% 12%, rgba(191, 110, 72, 0.13), transparent 28%),
    linear-gradient(180deg, #f5efe4 0%, #f7f4ec 38%, #fbfaf6 100%);
  font-family: "IBM Plex Sans KR", "Noto Sans KR", -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  line-height: 1.75;
}

html:lang(en) body {
  font-family: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

html:lang(en) .page-shell,
html:lang(en) .page-shell *,
html:lang(en) .site-header *,
html:lang(en) .site-footer * {
  word-break: normal;
  overflow-wrap: normal;
  hyphens: manual;
}

html:lang(en) h1,
html:lang(en) h2,
html:lang(en) h3,
html:lang(en) .hero-display,
html:lang(en) .identity-title,
html:lang(en) .snapshot-value {
  font-family: "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-weight: 800;
}

html:lang(ko) h1,
html:lang(ko) h2,
html:lang(ko) h3,
html:lang(ko) .hero-display,
html:lang(ko) .identity-title,
html:lang(ko) .snapshot-value {
  font-family: "IBM Plex Sans KR", "Noto Sans KR", -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  font-weight: 700;
}

html:lang(ko) .page-shell,
html:lang(ko) .page-shell *,
html:lang(ko) .site-header *,
html:lang(ko) .site-footer * {
  word-break: keep-all;
  overflow-wrap: normal;
  line-break: strict;
}

html:lang(ko) a[href^="mailto:"],
html:lang(ko) a[href^="http"] {
  word-break: break-all;
  overflow-wrap: anywhere;
}

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

a {
  color: var(--accent-strong);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

p,
li {
  color: var(--ink-820);
}

strong {
  color: var(--ink-950);
}

hr {
  border: 0;
  height: 1px;
  margin: 2.5rem 0;
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 300;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: var(--ink-950);
  color: #fff;
}

.skip-link:focus {
  top: 1rem;
}

/* 키보드 포커스 가시성 (a11y) — 링크·버튼·토글·pub-link·link-card 등 인터랙티브 일괄 */
:focus-visible {
  outline: 2px solid var(--accent-strong);
  outline-offset: 2px;
  border-radius: 6px;
}

.site-bg {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: -1;
}

.orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(14px);
  opacity: 0.6;
}

.orb-1 {
  width: 24rem;
  height: 24rem;
  left: -8rem;
  top: 6rem;
  background: rgba(23, 117, 101, 0.12);
}

.orb-2 {
  width: 18rem;
  height: 18rem;
  right: 8%;
  top: 4rem;
  background: rgba(191, 110, 72, 0.12);
}

.orb-3 {
  width: 22rem;
  height: 22rem;
  right: -8rem;
  bottom: 4rem;
  background: rgba(87, 116, 171, 0.08);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  backdrop-filter: blur(20px);
  background: rgba(251, 247, 240, 0.8);
  border-bottom: 1px solid rgba(20, 37, 44, 0.08);
}

.header-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.site-name {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--ink-950);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.site-name:hover {
  text-decoration: none;
}

.site-mark {
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--warm));
  box-shadow: 0 0 0 7px rgba(23, 117, 101, 0.08);
  flex-shrink: 0;
}

.site-name-text {
  font-size: 1rem;
}

.main-nav {
  flex: 1;
}

.nav-list {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 0.3rem;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.6rem;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  color: var(--ink-700);
  font-size: 0.95rem;
  font-weight: 500;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.nav-list a:hover,
.nav-list a.active {
  background: rgba(23, 117, 101, 0.1);
  color: var(--ink-950);
  text-decoration: none;
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 0.4rem;
}

.nav-toggle-bar {
  display: block;
  width: 1.35rem;
  height: 2px;
  margin: 4px 0;
  border-radius: 999px;
  background: var(--ink-950);
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.3rem;
  border-radius: 999px;
  background: rgba(20, 37, 44, 0.04);
}

.lang-current,
.lang-other {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 4.5rem;
  min-height: 2rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.84rem;
  text-decoration: none;
}

.lang-current {
  background: var(--ink-950);
  color: #fff;
  font-weight: 600;
}

.lang-other {
  color: var(--ink-700);
}

.lang-other:hover {
  background: rgba(20, 37, 44, 0.07);
  text-decoration: none;
}

.site-main {
  flex: 1;
}

.content-wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.page-shell {
  max-width: var(--page-width);
  margin: 0 auto;
  padding: clamp(2rem, 4vw, 3.25rem);
  background: var(--paper-soft);
  border: 1px solid rgba(255, 255, 255, 0.65);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(14px);
}

.page-shell-home {
  max-width: none;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
  backdrop-filter: none;
}

.page-shell > * + * {
  margin-top: 1.5rem;
}

.page-shell h1 {
  color: var(--ink-950);
  font-size: clamp(2.2rem, 5vw, 3.9rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.page-shell h2 {
  color: var(--ink-950);
  font-size: clamp(1.45rem, 2vw, 2rem);
  line-height: 1.22;
  letter-spacing: -0.03em;
  margin-bottom: 0.9rem;
}

.page-shell h3 {
  color: var(--ink-950);
  font-size: 1.22rem;
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin-bottom: 0.4rem;
}

.page-shell p {
  margin-bottom: 1rem;
  text-wrap: pretty;
}

.page-shell ul,
.page-shell ol {
  margin-bottom: 1rem;
  padding-left: 1.2rem;
}

.page-shell li + li {
  margin-top: 0.45rem;
}

.page-intro {
  max-width: 42rem;
  margin-bottom: 2.5rem;
}

.page-intro p:last-child {
  font-size: 1.08rem;
  color: var(--ink-700);
}

.eyebrow,
.section-kicker,
.feature-index,
.identity-label {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 0.9rem;
  color: var(--accent-strong);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow::before,
.section-kicker::before,
.identity-label::before {
  content: "";
  width: 1.4rem;
  height: 1px;
  background: rgba(15, 90, 78, 0.45);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.2rem;
  padding: 0.8rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.button:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.button-primary {
  background: var(--ink-950);
  color: #fff;
  box-shadow: 0 12px 30px rgba(20, 37, 44, 0.18);
}

.button-primary:hover {
  color: #fff;
}

.button-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.62);
  color: var(--ink-950);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin: 1.75rem 0 1.5rem;
}

.pill-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-left: 0;
  margin: 0;
}

.pill-list li {
  margin: 0;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(20, 37, 44, 0.08);
  color: var(--ink-820);
  font-size: 0.94rem;
}

.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.85fr);
  gap: 1.6rem;
  align-items: stretch;
  margin-bottom: 1.8rem;
}

.hero-copy,
.hero-aside,
.section-panel,
.panel-card,
.feature-card,
.snapshot-card,
.pub-item,
.proj-item {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.72);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.8));
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(14px);
}

@media (prefers-reduced-motion: no-preference) {
  .hero-copy,
  .hero-aside,
  .snapshot-card,
  .panel-card,
  .section-panel,
  .feature-card,
  .pub-item,
  .proj-item {
    animation: rise-in 0.72s ease both;
  }

  .hero-aside {
    animation-delay: 0.08s;
  }

  .snapshot-card:nth-child(2) {
    animation-delay: 0.04s;
  }

  .snapshot-card:nth-child(3) {
    animation-delay: 0.08s;
  }

  .snapshot-card:nth-child(4) {
    animation-delay: 0.12s;
  }
}

.hero-copy {
  padding: clamp(2rem, 4vw, 3rem);
}

.hero-display {
  max-width: 12ch;
  margin-bottom: 1rem;
}

.hero-summary {
  max-width: 40rem;
  font-size: 1.1rem;
  color: var(--ink-700);
}

html:lang(en) .page-shell h1,
html:lang(en) .page-shell h2,
html:lang(en) .hero-display {
  text-wrap: balance;
}

html:lang(ko) .page-shell h1,
html:lang(ko) .page-shell h2,
html:lang(ko) .hero-display {
  text-wrap: pretty;
}

.hero-aside {
  padding: 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.profile-photo {
  width: 100%;
  aspect-ratio: 4 / 4.6;
  object-fit: cover;
  border-radius: 22px;
  background: var(--mist);
}

.identity-card {
  padding: 1.25rem 1.2rem;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(23, 117, 101, 0.08), rgba(255, 255, 255, 0.88));
  border: 1px solid rgba(23, 117, 101, 0.12);
}

.identity-title {
  font-size: 1.5rem;
  line-height: 1.3;
  margin-bottom: 1rem;
}

.meta-list {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.meta-list li {
  display: grid;
  gap: 0.2rem;
  padding: 0.85rem 0;
  border-top: 1px solid rgba(20, 37, 44, 0.08);
}

.meta-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.meta-list span {
  color: var(--ink-580);
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.snapshot-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1.8rem;
}

.snapshot-card {
  min-height: 12rem;
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.snapshot-value {
  color: var(--ink-950);
  font-size: clamp(2rem, 4vw, 3.1rem);
  line-height: 1;
}

.snapshot-label {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-strong);
}

.snapshot-card p {
  margin: 0.9rem 0 0;
  color: var(--ink-700);
  font-size: 0.96rem;
}

.section-block {
  margin-top: 1.8rem;
}

.section-heading {
  max-width: 40rem;
  margin-bottom: 1rem;
}

.section-panel,
.panel-card {
  padding: 1.6rem;
}

.two-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.8rem;
}

.tone-card {
  background: linear-gradient(180deg, rgba(215, 238, 231, 0.72), rgba(255, 255, 255, 0.84));
}

.stack-list {
  display: grid;
  gap: 1rem;
}

.stack-item {
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.stack-item:first-child {
  padding-top: 0;
  border-top: 0;
}

.timeline-list {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  position: relative;
  padding: 0 0 0 1.25rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--warm));
  box-shadow: 0 0 0 8px rgba(23, 117, 101, 0.08);
}

.timeline-date {
  margin-bottom: 0.35rem;
  color: var(--ink-580);
  font-size: 0.88rem;
  font-weight: 600;
}

.timeline-item p:last-child {
  margin-bottom: 0;
}

.link-grid {
  display: grid;
  gap: 0.8rem;
}

.link-card {
  display: grid;
  gap: 0.2rem;
  padding: 1rem 1.05rem;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(20, 37, 44, 0.08);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.link-card:hover {
  text-decoration: none;
  transform: translateY(-2px);
  border-color: rgba(23, 117, 101, 0.22);
  box-shadow: 0 12px 30px rgba(20, 37, 44, 0.08);
}

.link-card strong {
  color: var(--ink-950);
  font-size: 1rem;
}

.link-card span {
  color: var(--ink-700);
  font-size: 0.95rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.feature-card {
  padding: 1.5rem;
}

.feature-index {
  color: var(--warm);
}

.compact-list {
  padding-left: 1.1rem;
}

.compact-list li::marker {
  color: var(--accent-strong);
}

.pub-item,
.proj-item {
  margin-bottom: 1rem;
  padding: 1.3rem 1.35rem;
}

.pub-title,
.proj-title {
  color: var(--ink-950);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.45;
}

.pub-meta,
.proj-meta {
  margin-top: 0.75rem;
  color: var(--ink-700);
  font-size: 0.95rem;
}

.pub-takeaway,
.proj-desc {
  margin-top: 0.6rem;
  color: var(--ink-820);
  font-size: 0.96rem;
  line-height: 1.6;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.85rem;
}

.pub-link {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0.38rem 0.72rem;
  border: 1px solid rgba(23, 117, 101, 0.16);
  border-radius: 999px;
  background: rgba(23, 117, 101, 0.06);
  color: var(--accent-strong);
  font-size: 0.85rem;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
}

.pub-link:hover {
  background: rgba(23, 117, 101, 0.12);
  text-decoration: none;
}

.contact-list {
  list-style: none;
  padding-left: 0;
}

.contact-list li {
  margin: 0;
  padding: 0.9rem 0;
  border-top: 1px solid var(--line);
}

.contact-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.note-text {
  color: var(--ink-700);
  font-size: 0.96rem;
  margin-top: 1rem;
}

.site-footer {
  padding: 0 1.5rem 2.5rem;
}

.footer-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 1.5rem 1.75rem 0;
  border-top: 1px solid rgba(20, 37, 44, 0.1);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 1rem;
}

.footer-name {
  color: var(--ink-950);
  font-weight: 700;
  margin: 0;
}

.footer-meta {
  color: var(--ink-580);
  font-size: 0.92rem;
  margin: 0;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1080px) {
  .hero-section,
  .two-column,
  .feature-grid,
  .snapshot-grid {
    grid-template-columns: 1fr;
  }

  .snapshot-card {
    min-height: auto;
  }
}

@media (max-width: 780px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 0.85rem;
  }

  .main-nav {
    order: 3;
    width: 100%;
  }

  .nav-toggle {
    display: inline-block;
  }

  .nav-list {
    display: none;
    margin-top: 0.75rem;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    padding: 0.4rem;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(20, 37, 44, 0.08);
  }

  .nav-list.nav-open {
    display: flex;
  }

  .nav-list a {
    justify-content: flex-start;
  }

  .lang-switch {
    margin-left: auto;
  }

  .content-wrap {
    padding: 1.2rem 1rem 3rem;
  }

  .page-shell {
    padding: 1.5rem 1.15rem;
    border-radius: 24px;
  }

  .hero-copy,
  .hero-aside,
  .section-panel,
  .panel-card,
  .feature-card,
  .snapshot-card,
  .pub-item,
  .proj-item {
    padding: 1.25rem;
  }

  .hero-display {
    max-width: none;
  }
}

@media (max-width: 560px) {
  .button,
  .lang-current,
  .lang-other {
    width: 100%;
  }

  .hero-actions {
    flex-direction: column;
  }

  .lang-switch {
    width: 100%;
  }

  .footer-inner {
    flex-direction: column;
  }
}