:root {
  --bg: #f6f8fc;
  --surface: #ffffff;
  --surface-soft: #f1f5fb;
  --text: #1b2430;
  --muted: #617086;
  --line: rgba(27, 36, 48, 0.08);
  --accent: #3f72af;
  --accent-soft: rgba(63, 114, 175, 0.12);
  --shadow: 0 18px 45px rgba(27, 36, 48, 0.08);
  --shadow-soft: 0 10px 24px rgba(27, 36, 48, 0.06);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --nav-height: 80px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(63, 114, 175, 0.1), transparent 28%),
    linear-gradient(180deg, #fbfcff 0%, var(--bg) 100%);
  color: var(--text);
}

body.modal-open {
  overflow: hidden;
}

a,
button,
input {
  font: inherit;
}

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

button {
  border: 0;
  background: none;
  cursor: pointer;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.section {
  padding: 110px 0;
  scroll-margin-top: 95px;
}

.navbar {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(14px);
  background: rgba(246, 248, 252, 0.8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.7);
}

.nav-inner {
  min-height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: "Manrope", sans-serif;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), #7da7cf);
  color: #fff;
  box-shadow: var(--shadow-soft);
}

.brand-text {
  font-size: 1rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  color: var(--muted);
  font-family: "Manrope", sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.nav-link:hover,
.nav-link:focus-visible,
.nav-link.is-active {
  background: var(--accent-soft);
  color: var(--accent);
  outline: none;
}

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.hero-card,
.info-card,
.feature-card,
.project-card,
.contact-card {
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.hero-card,
.contact-card {
  border-radius: calc(var(--radius-xl) + 6px);
  padding: 42px;
}

.hero-grid,
.about-layout {
  display: grid;
  gap: 28px;
}

.hero-grid {
  grid-template-columns: 1.45fr 0.85fr;
  align-items: start;
}

.hero-kicker,
.eyebrow,
.project-date {
  margin: 0 0 12px;
  font-family: "Manrope", sans-serif;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  font-size: 0.78rem;
}

.hero-card h1,
.section-heading h2 {
  margin: 0;
  font-family: "Manrope", sans-serif;
  letter-spacing: -0.04em;
}

.hero-card h1 {
  max-width: 12ch;
  font-size: clamp(2.5rem, 5vw, 4.8rem);
  line-height: 1.02;
}

.hero-summary,
.section-heading p,
.info-card p,
.project-summary,
.contact-link p,
.stat-card p,
.modal-intro,
.modal-block p {
  color: var(--muted);
  line-height: 1.75;
}

.hero-summary {
  max-width: 62ch;
  margin: 18px 0 0;
  font-size: 1rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.button-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #628ebd);
  box-shadow: var(--shadow-soft);
}

.button-secondary {
  background: var(--surface-soft);
  color: var(--text);
}

.button:hover,
.button:focus-visible,
.contact-link:hover,
.contact-link:focus-visible,
.project-card:hover,
.project-card:focus-visible,
.feature-card:hover,
.feature-card:focus-visible,
.floating-contact:hover,
.floating-contact:focus-visible,
.filter-button:hover,
.filter-button:focus-visible {
  transform: translateY(-2px);
  outline: none;
}

.hero-highlights,
.details-grid,
.featured-grid,
.projects-grid,
.contact-grid {
  display: grid;
  gap: 22px;
}

.hero-highlights {
  gap: 16px;
}

.stat-card,
.info-card,
.feature-card,
.project-card {
  border-radius: var(--radius-xl);
  padding: 28px;
}

.stat-label,
.skill-label,
.detail-label {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
}

.stat-card strong,
.section-heading h3,
.project-card h3,
.feature-card h3,
.contact-link strong {
  display: block;
  font-family: "Manrope", sans-serif;
  letter-spacing: -0.03em;
}

.about-layout {
  margin-top: 28px;
  grid-template-columns: 1.05fr 0.95fr;
}

.section-heading {
  margin-bottom: 26px;
}

.section-heading.compact {
  margin-bottom: 18px;
}

.section-heading h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.08;
}

.section-heading h3 {
  margin: 0;
  font-size: 1.35rem;
}

.mini-pills,
.chip-row,
.summary-items,
.filter-group,
.modal-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill,
.chip,
.category-badge,
.filter-button {
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 0.88rem;
  font-weight: 600;
}

.pill,
.chip,
.category-badge {
  background: var(--surface-soft);
  color: var(--text);
}

.timeline-item + .timeline-item {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.timeline-item p,
.simple-list {
  color: var(--muted);
}

.simple-list {
  margin: 0;
  padding-left: 18px;
  line-height: 1.9;
}

.skills-card .skill-group + .skill-group {
  margin-top: 18px;
}

.summary-items span {
  display: inline-flex;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: var(--surface-soft);
  color: var(--text);
  font-weight: 500;
}

.featured-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.section-link-row {
  display: flex;
  justify-content: flex-end;
  margin-top: 24px;
}

.more-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--accent);
  font-family: "Manrope", sans-serif;
  font-weight: 800;
  letter-spacing: -0.01em;
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.more-link:hover,
.more-link:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  outline: none;
}

.feature-card,
.project-card {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  text-align: left;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.feature-card:hover,
.feature-card:focus-visible,
.project-card:hover,
.project-card:focus-visible,
.contact-link:hover,
.contact-link:focus-visible {
  box-shadow: 0 24px 54px rgba(27, 36, 48, 0.11);
  border-color: rgba(63, 114, 175, 0.18);
}

.feature-card p,
.project-summary {
  margin: 0 0 20px;
}

.project-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.search-box {
  flex: 1 1 280px;
}

.search-box input {
  width: 100%;
  min-height: 52px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--text);
  box-shadow: var(--shadow-soft);
}

.search-box input:focus-visible {
  outline: 2px solid rgba(63, 114, 175, 0.25);
  outline-offset: 2px;
}

.filter-button {
  background: rgba(255, 255, 255, 0.9);
  color: var(--muted);
  border: 1px solid rgba(27, 36, 48, 0.08);
}

.filter-button.is-active {
  background: var(--accent);
  color: #fff;
}

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

.project-card h3,
.feature-card h3 {
  margin: 10px 0 12px;
  font-size: 1.35rem;
}

.meta-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.category-badge {
  background: var(--accent-soft);
  color: var(--accent);
}

.project-card-footer,
.feature-card-footer {
  margin-top: auto;
  padding-top: 20px;
  display: flex;
  align-items: flex-end;
}

.feature-card .chip-row,
.project-card .chip-row {
  margin-top: 4px;
}

.card-cta {
  color: var(--accent);
  font-family: "Manrope", sans-serif;
  font-size: 0;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.card-cta::before {
  content: "\C790\C138\D788\BCF4\AE30\0020\002D\003E";
  font-size: 0.95rem;
}

.contact-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

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

.project-page-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}

.scroll-hint {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin-top: 28px;
  color: var(--accent);
  font-family: "Manrope", sans-serif;
  font-weight: 700;
}

.scroll-hint-arrow {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent-soft);
  position: relative;
  animation: floatArrow 1.8s ease-in-out infinite;
}

.scroll-hint-arrow::before,
.scroll-hint-arrow::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--accent);
  transform: translate(-50%, -50%);
}

.scroll-hint-arrow::before {
  width: 2px;
  height: 11px;
  margin-top: 1px;
}

.scroll-hint-arrow::after {
  width: 8px;
  height: 8px;
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  background: transparent;
  transform: translate(-50%, -25%) rotate(45deg);
}

.scroll-hint:hover,
.scroll-hint:focus-visible {
  transform: translateY(-2px);
  outline: none;
}

.projects-section.standalone {
  padding-top: 20px;
}

.contact-link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 140px;
  padding: 24px;
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(27, 36, 48, 0.08);
  box-shadow: var(--shadow-soft);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.contact-link span {
  color: var(--accent);
  font-family: "Manrope", sans-serif;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.floating-contact {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 35;
  min-height: 58px;
  padding: 0 20px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), #628ebd);
  color: #fff;
  font-family: "Manrope", sans-serif;
  font-weight: 800;
  box-shadow: 0 18px 32px rgba(63, 114, 175, 0.28);
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(17, 24, 39, 0.52);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  z-index: 60;
}

.modal-backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

.modal-dialog {
  width: min(840px, 100%);
  max-height: min(90vh, 860px);
  overflow: auto;
  border-radius: 28px;
  background: #fff;
  box-shadow: 0 24px 70px rgba(17, 24, 39, 0.24);
  position: relative;
}

.contact-modal {
  width: min(700px, 100%);
}

.modal-content {
  padding: 34px;
}

.modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--surface-soft);
  color: var(--text);
  font-size: 1.5rem;
}

.modal-close:hover,
.modal-close:focus-visible {
  background: var(--accent-soft);
  color: var(--accent);
  outline: none;
}

.modal-header {
  padding-right: 56px;
  margin-bottom: 26px;
}

.modal-header h2 {
  margin: 0;
  font-family: "Manrope", sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.modal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.modal-block {
  padding: 20px;
  border-radius: 18px;
  background: var(--surface-soft);
}

.modal-block.full {
  grid-column: 1 / -1;
}

.modal-link {
  display: inline-flex;
  margin-top: 12px;
  color: var(--accent);
  font-weight: 700;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes floatArrow {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(4px);
  }
}

@media (max-width: 980px) {
  .hero-grid,
  .about-layout,
  .featured-grid,
  .projects-grid,
  .contact-grid,
  .contact-grid.compact,
  .modal-grid {
    grid-template-columns: 1fr;
  }

  .project-page-heading {
    display: grid;
    align-items: start;
  }

  .scroll-hint {
    margin-top: 22px;
  }
}

@media (max-width: 760px) {
  .section {
    padding: 88px 0;
  }

  .container {
    width: min(100% - 28px, 1120px);
  }

  .hero-card,
  .contact-card,
  .info-card,
  .feature-card,
  .project-card,
  .modal-content {
    padding: 24px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .nav-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: 14px;
    left: 14px;
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 12px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
    border: 1px solid rgba(27, 36, 48, 0.08);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
  }

  .nav-menu.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 0 14px;
    border-radius: 14px;
  }

  .project-toolbar {
    align-items: stretch;
  }

  .filter-group {
    overflow-x: auto;
    padding-bottom: 4px;
    flex-wrap: nowrap;
  }

  .floating-contact {
    right: 16px;
    bottom: 16px;
    min-height: 52px;
  }

  .project-page-heading {
    display: grid;
    align-items: start;
  }

  .section-link-row {
    justify-content: flex-start;
  }
}