@import url('./reset.css');

:root {
  --color-white: #ffffff;
  --color-black: #050a13;
  /* pastel accents — see design.md */
  --color-blue: #8fd8de;
  --color-orange: #f2a882;
  --color-gray: #1b1e26;
  --color-light-gray: #6b7280;

  --color-primary: var(--color-black);
  --color-primary-variant: var(--color-gray);
  --color-accent: var(--color-blue);
  --color-accent-variant: var(--color-orange);
  --color-accent-strong: #3b9aa3; /* accent as text/border on white */
  --color-accent-soft: #e8f6f7; /* tinted backgrounds */
  --color-warm-strong: #c7724c; /* warm accent as text on white */
  --color-text: var(--color-white);

  --size-max-width: 1200px;

  --divider-single-wave: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120" preserveAspectRatio="none" > <path d="M321.39,56.44c58-10.79,114.16-30.13,172-41.86,82.39-16.72,168.19-17.73,250.45-.39C823.78,31,906.67,72,985.66,92.83c70.05,18.48,146.53,26.09,214.34,3V0H0V27.35A600.21,600.21,0,0,0,321.39,56.44Z" ></path> </svg>');
  --divider-tilt: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120" preserveAspectRatio="none"> <path d="M1200 120L0 16.48 0 0 1200 0 1200 120z"></path> </svg>');
  --divider-arrow: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120" preserveAspectRatio="none" > <path d="M649.97 0L550.03 0 599.91 54.12 649.97 0z"></path> </svg>');
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html,
body {
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont,
    system-ui, 'Apple SD Gothic Neo', 'Noto Sans KR', 'Malgun Gothic', sans-serif;
  letter-spacing: -0.01em;
  line-height: 1.6;
  word-break: keep-all;
  -webkit-font-smoothing: antialiased;
  background-color: var(--color-white);
  color: var(--color-primary);
}

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

button {
  border: 0;
  background: transparent;
  outline: 0;
  font-family: inherit;
}

button:focus {
  outline: 1px solid transparent;
}

.section {
  padding: 4rem;
  text-align: center;
}

.max-container {
  max-width: var(--size-max-width);
  margin: auto;
}

.title {
  margin: 1rem 0;
  font-size: 2.5rem;
  font-weight: 700;
}

.sub-title {
  position: relative;
  margin: 3rem 0 0.8rem;
  font-size: 1.4rem;
  font-weight: 700;
  text-align: left;
}

.sub-title::before {
  content: '';
  display: block;
  position: absolute;
  bottom: -4px;
  left: 2px;
  width: 3rem;
  height: 0.2rem;
  background-color: var(--color-accent);
}

.description {
  margin: 0.5rem 0;
  font-size: 1.3rem;
  line-height: 1.6;
}

/* ---------- header ---------- */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1rem;
  background-color: transparent;
  z-index: 10;
  transition: all 300ms ease;
}

.header--dark {
  background-color: var(--color-primary);
}

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

.header__logo__img {
  width: 36px;
  height: 36px;
}

.header__logo__title {
  font-size: 1.8rem;
  font-weight: 700;
}

.header__toggle {
  display: none;
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: 1.8rem;
  color: var(--color-white);
  cursor: pointer;
}

.header__menu {
  display: flex;
  gap: 4px;
}

.header__menu__item {
  display: block;
  padding: 8px 16px;
  border: 1px solid transparent;
}

.header__menu__item:hover {
  border-bottom: 1px solid var(--color-accent);
}

.header__menu__item.active {
  border: 1px solid var(--color-accent);
  border-radius: 4px;
}

.header__lang {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 8px;
  padding: 0 12px;
  border-left: 1px solid rgba(255, 255, 255, 0.3);
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.5);
}

.header__lang__item {
  color: rgba(255, 255, 255, 0.6);
  transition: color 200ms ease;
}

.header__lang__item:hover,
.header__lang__item--current {
  color: var(--color-accent);
  font-weight: 700;
}

/* ---------- home ---------- */
#home {
  position: relative;
  padding: 5rem 1rem;
  padding-top: 7rem;
  background-color: var(--color-primary);
  text-align: center;
  color: var(--color-text);
}

#home::after {
  overflow: hidden;
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: calc(108% + 1.3px);
  height: 70px;
  background-color: var(--color-white);
  line-height: 0;
  transform: rotate(180deg);
  mask: var(--divider-single-wave);
  -webkit-mask: var(--divider-single-wave);
}

.home__avatar {
  width: 250px;
  height: 250px;
  border: 3px solid var(--color-accent);
  border-radius: 100%;
  object-position: top;
  object-fit: cover;
}

.home__title {
  margin: 1rem 0;
  font-size: 3rem;
  font-weight: 700;
}

.home__title--strong {
  color: var(--color-accent);
}

.home__title--strong::after {
  content: '|';
  margin-left: 2px;
  font-weight: 400;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.home__role {
  margin-bottom: 0.8rem;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.home__description {
  font-size: 1.3rem;
}

.home__contact {
  display: inline-block;
  margin: 2rem;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  background-color: var(--color-accent);
  font-weight: bold;
  color: var(--color-black);
}

.home__contact:hover {
  background-color: transparent;
  color: var(--color-text);
  outline: 2px solid var(--color-accent);
}

/* ---------- about ---------- */
.majors {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  gap: 1rem;
  margin: 2.5rem 0;
}

.major {
  flex: 1 1;
  padding: 2rem 1rem;
  border-radius: 1rem;
  box-shadow: rgba(0, 0, 0, 0.15) 1.95px 1.95px 2.6px;
  background-color: var(--color-primary-variant);
  color: var(--color-text);
  cursor: default;
}

.major__icon {
  margin: 1rem 0;
  font-size: 4rem;
  color: var(--color-accent);
  transition: all 300ms ease;
}

.major__title {
  margin-bottom: 0.5rem;
  font-size: 1.4rem;
  font-weight: 700;
}

.major__description {
  font-size: 0.95rem;
  line-height: 1.5;
  opacity: 0.75;
}

.major:hover .major__icon {
  transform: rotate(-15deg) scale(1.2);
}

.about__intro {
  max-width: 720px;
  margin: 0.5rem auto 0;
  font-size: 1.35rem;
  font-weight: 500;
  line-height: 1.6;
}

.timeline {
  text-align: start;
}

.timeline__item {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 1.5rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid #eceef1;
}

.timeline__item:last-child {
  border-bottom: 0;
}

.timeline__date {
  font-size: 0.95rem;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  color: var(--color-light-gray);
}

.timeline__title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.4;
}

.timeline__text {
  margin-top: 0.2rem;
  font-size: 0.98rem;
  color: #3f4652;
}

.timeline__prize {
  display: inline-block;
  margin-left: 0.3rem;
  padding: 0 0.5rem;
  border: 1px solid var(--color-warm-strong);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--color-warm-strong);
}

.awards__label {
  margin: 1.6rem 0 0.8rem;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-align: left;
  color: var(--color-light-gray);
}

.awards {
  display: grid;
  gap: 1rem;
  text-align: left;
}

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

.awards--academic:has(> .award:only-child) {
  grid-template-columns: 1fr;
}

.award {
  display: grid;
  grid-template-columns: 132px 1fr;
  gap: 1.5rem;
  align-items: start;
  padding: 1.2rem;
  border: 1px solid #eceef1;
  border-radius: 14px;
  background-color: var(--color-white);
  box-shadow: rgba(0, 0, 0, 0.04) 0 4px 14px;
}

.awards--academic .award {
  grid-template-columns: 76px 1fr;
  gap: 1rem;
  padding: 1rem;
}

.award__figure {
  margin: 0;
}

.award__thumb {
  display: block;
  position: relative;
  overflow: hidden;
  aspect-ratio: 3 / 4;
  border: 1px solid #e3e6ea;
  border-radius: 8px;
  background-color: #f5f6f8;
  cursor: zoom-in;
}

.award__thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 250ms ease;
}

.award__zoom {
  display: flex;
  justify-content: center;
  align-items: center;
  position: absolute;
  inset: 0;
  background-color: rgba(5, 10, 19, 0.45);
  font-size: 1.6rem;
  color: var(--color-white);
  opacity: 0;
  transition: opacity 200ms ease;
}

.award__count {
  position: absolute;
  right: 6px;
  bottom: 6px;
  padding: 0 0.45rem;
  border-radius: 999px;
  background-color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.6;
  color: var(--color-white);
}

.award__count::after {
  content: '장';
}

:lang(en) .award__count::after {
  content: '';
}

.timeline__cert {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: 0.4rem;
  padding: 0 0.55rem;
  border: 1px solid #d5d9df;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  color: #4b5260;
  cursor: zoom-in;
}

.timeline__cert:hover {
  border-color: var(--color-accent);
  color: var(--color-primary);
}

.award__thumb:hover img,
.award__thumb:focus-visible img {
  transform: scale(1.04);
}

.award__thumb:hover .award__zoom,
.award__thumb:focus-visible .award__zoom {
  opacity: 1;
}

.award__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 0.8rem;
  font-size: 0.88rem;
  font-variant-numeric: tabular-nums;
  color: var(--color-light-gray);
}

.award__event {
  margin-top: 0.35rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.45;
}

.award__prize {
  display: inline-block;
  margin-left: 0.25rem;
  padding: 0 0.55rem;
  border: 1px solid var(--color-warm-strong);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.7;
  vertical-align: 0.1em;
  color: var(--color-warm-strong);
}

.award__title {
  margin-top: 0.7rem;
  font-size: 1.15rem;
  font-weight: 800;
  line-height: 1.4;
}

.award__description {
  margin-top: 0.4rem;
  font-size: 0.95rem;
  line-height: 1.65;
  color: #3f4652;
}

.awards--academic .award__event {
  font-size: 0.95rem;
}

.awards--academic .award__description {
  font-size: 0.88rem;
}

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

.timeline--compact .timeline__item {
  grid-template-columns: 90px 1fr;
  gap: 1rem;
  padding: 0.8rem 0;
}

.timeline--compact .timeline__text {
  margin-top: 0;
  color: var(--color-primary);
}

.about__columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.6rem;
}

.tags--center {
  justify-content: center;
  margin-top: 1rem;
}

.tag {
  padding: 0.1rem 0.6rem;
  border: 1px solid var(--color-accent);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* ---------- skills ---------- */
#skills {
  position: relative;
  background-color: var(--color-primary-variant);
  color: var(--color-text);
}

#skills::after {
  overflow: hidden;
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: calc(100% + 1.3px);
  height: 20px;
  background-color: var(--color-white);
  line-height: 0;
  transform: rotate(180deg);
  mask: var(--divider-tilt);
  -webkit-mask: var(--divider-tilt);
}

.skills {
  overflow: hidden;
  display: grid;
  grid-template-columns: 6fr 4fr;
  margin: 2rem 3rem;
  border-radius: 8px;
  box-shadow: rgba(0, 0, 0, 0.25) 0px 14px 28px, rgba(0, 0, 0, 0.22) 0px 10px 10px;
}

.skills__title {
  margin: 1rem 0;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-accent);
}

.skills__coding {
  grid-row: span var(--skill-groups, 2);
  padding: 1rem;
  background-color: var(--color-primary);
}

.skills__group {
  padding: 1rem;
}

.skills__group:nth-of-type(odd) {
  background-color: var(--color-primary);
  filter: brightness(150%);
}

.skills__items {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.4rem 1rem;
}

.bar {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem;
}

.bar__metadata {
  display: flex;
  justify-content: space-between;
}

.bar__bg {
  width: 100%;
  height: 3px;
  background-color: var(--color-primary-variant);
}

.bar__value {
  height: 3px;
  background-color: var(--color-accent);
}

/* ---------- projects ---------- */
.project-modes {
  display: inline-flex;
  gap: 0.25rem;
  margin-top: 2rem;
  padding: 0.3rem;
  border-radius: 999px;
  background-color: #eef0f3;
}

.project-mode {
  padding: 0.45rem 1.3rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-light-gray);
  cursor: pointer;
  transition: background-color 200ms ease, color 200ms ease;
}

.project-mode--active {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.project-panel[hidden] {
  display: none;
}

.categories {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 2rem 2.5rem 2.5rem;
}

.categories--tech {
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 2rem 0 2.5rem;
}

.categories--tech .category {
  padding: 0.45rem 0.85rem;
  font-size: 0.95rem;
}

.categories--tech .category__count,
.categories--tech .category:hover .category__count {
  position: static;
  display: inline-block;
  width: auto;
  height: auto;
  margin-left: 0.35rem;
  padding: 0 0.45rem;
  border-radius: 999px;
  background-color: #eef0f3;
  font-size: 0.8rem;
  line-height: 1.6;
  color: #4b5260;
  opacity: 1;
}

.categories--tech .category--selected .category__count {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.category {
  position: relative;
  padding: 0.5rem 3rem;
  border: 1px solid var(--color-accent);
  border-radius: 4px;
  font-size: 1.1rem;
  white-space: nowrap;
  cursor: pointer;
}

.category--selected,
.category:hover {
  background-color: var(--color-accent);
  color: var(--color-primary);
}

.category__count {
  position: absolute;
  top: -20px;
  right: 16px;
  width: 28px;
  height: 28px;
  border-radius: 100%;
  background-color: var(--color-accent-variant);
  line-height: 28px;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0;
  transition: all 250ms ease-in;
  pointer-events: none;
}

.category--selected .category__count,
.category:hover .category__count {
  top: 0;
  opacity: 1;
}

.projects {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  transition: all 250ms ease-out;
}

.projects.anim-out {
  opacity: 0;
  transform: scale(0.96) translateY(20px);
}

.project {
  overflow: hidden;
  position: relative;
  border: 1px solid #eceef1;
  border-radius: 10px;
  background-color: var(--color-white);
  box-shadow: rgba(0, 0, 0, 0.06) 0 4px 12px;
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.project:hover {
  transform: translateY(-3px);
  box-shadow: rgba(0, 0, 0, 0.12) 0 10px 22px;
}

.project__media {
  position: relative;
  overflow: hidden;
}

.project__img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  object-position: center;
  background-color: #f5f6f8;
}

.project__metadata {
  display: flex;
  justify-content: center;
  align-items: center;
  position: absolute;
  inset: 0;
  padding: 1.2rem;
  background-color: rgba(5, 10, 19, 0.85);
  opacity: 0;
  transition: opacity 250ms ease-in;
}

.project a:hover .project__metadata,
.project a:focus-visible .project__metadata {
  opacity: 1;
}

.project__info {
  padding: 0.85rem 1rem 1rem;
  border-top: 1px solid #eceef1;
  background-color: var(--color-white);
  text-align: left;
}

.project__meta {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-accent-strong);
}

.project__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.55rem;
}

.project__tags li {
  padding: 0 0.45rem;
  border-radius: 4px;
  background-color: #f1f3f5;
  font-size: 0.72rem;
  line-height: 1.7;
  color: #4b5260;
}

.project__name {
  display: -webkit-box;
  overflow: hidden;
  margin-top: 0.2rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-primary);
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.project__description {
  font-size: 0.92rem;
  line-height: 1.6;
  word-break: keep-all;
  color: var(--color-white);
}

/* ---------- project detail ---------- */
.detail__hero {
  padding-bottom: 7rem !important;
}

.detail__category {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.detail__title {
  margin: 0.8rem 0;
  font-size: 2.8rem;
  font-weight: 700;
}

.detail__award {
  margin-top: 1rem;
  color: var(--color-warm-strong);
  font-weight: 600;
}

.detail__period {
  margin-top: 1rem;
  font-size: 1rem;
  opacity: 0.8;
}

.detail__visit {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.4rem 1rem;
  border: 1px solid var(--color-accent);
  border-radius: 4px;
  font-weight: 600;
}

.detail__visit:hover {
  background-color: var(--color-accent);
  color: var(--color-primary);
}

.detail__headline {
  margin: 1rem 0 2rem;
  font-size: 1.8rem;
  font-weight: 700;
}

.detail__columns {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  text-align: left;
}

.detail__column .sub-title {
  margin-top: 0;
}

.detail__list li {
  position: relative;
  margin-bottom: 0.8rem;
  padding-left: 1rem;
  line-height: 1.6;
}

.detail__list li::before {
  content: '';
  position: absolute;
  top: 0.65em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 100%;
  background-color: var(--color-accent);
}

.ba {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1rem;
  margin: 0 0 2.5rem;
  text-align: left;
}

.ba__label {
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-light-gray);
}

.ba__row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: stretch;
  gap: 0.6rem;
}

.ba__cell {
  padding: 0.9rem 1rem;
  border-radius: 10px;
  background-color: #f5f6f8;
}

.ba__cell span {
  display: block;
  margin-bottom: 0.2rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-light-gray);
}

.ba__cell p {
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.45;
}

.ba__cell--after {
  background-color: var(--color-accent-soft);
}

.ba__cell--after span {
  color: var(--color-accent-strong);
}

.ba__arrow {
  align-self: center;
  font-size: 1.2rem;
  color: var(--color-accent-strong);
}

.detail__extra {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 2rem;
  margin-top: 2.5rem;
  text-align: left;
}

.detail__block .sub-title {
  margin-top: 0;
}

.decisions li {
  margin-bottom: 0.9rem;
  padding-left: 0.9rem;
  border-left: 3px solid var(--color-accent);
}

.decisions__choice {
  font-weight: 700;
  line-height: 1.5;
}

.decisions__reason {
  margin-top: 0.15rem;
  font-size: 0.93rem;
  line-height: 1.6;
  color: #4b5260;
}

.detail__figure {
  margin: 3rem 0 0;
  padding: 1rem;
  border-radius: 8px;
  box-shadow: rgba(0, 0, 0, 0.12) 0 6px 20px;
}

.detail__figure img {
  display: block;
  max-width: 100%;
  max-height: 560px;
  margin: auto;
  object-fit: contain;
}

.detail__figure figcaption {
  margin-top: 0.8rem;
  font-size: 0.9rem;
  color: var(--color-light-gray);
}

.detail__nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  margin-top: 3rem;
}

.detail__nav > :first-child {
  justify-self: start;
}

.detail__nav > :last-child {
  justify-self: end;
}

.detail__nav__link {
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-accent);
  border-radius: 4px;
  color: var(--color-primary);
}

.detail__nav__link:hover,
.detail__nav__link--all {
  background-color: var(--color-accent);
}

/* ---------- experience ---------- */
#experience {
  background-color: #f5f6f8;
}

.competencies {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin-bottom: 3rem;
  text-align: left;
}

.competency {
  padding: 1.2rem;
  border-radius: 12px;
  background-color: var(--color-white);
  box-shadow: rgba(0, 0, 0, 0.05) 0 2px 8px;
}

.competency__num {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-warm-strong);
}

.competency__title {
  margin: 0.3rem 0 0.4rem;
  font-size: 1.05rem;
  font-weight: 700;
}

.competency__text {
  font-size: 0.88rem;
  line-height: 1.55;
  color: #4b5260;
}

.companies {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  text-align: left;
}

.company {
  padding: 2rem 2.2rem;
  border-radius: 16px;
  background-color: var(--color-white);
  box-shadow: rgba(0, 0, 0, 0.06) 0 4px 16px;
}

.company__head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}

.company__name {
  font-size: 1.5rem;
  font-weight: 800;
}

.company__role {
  font-weight: 600;
  color: var(--color-accent-strong);
}

.company__period {
  flex-shrink: 0;
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
  color: var(--color-light-gray);
}

.company__summary {
  margin-top: 0.8rem;
  font-size: 1.05rem;
  color: #3f4652;
}

.pubs {
  display: grid;
  gap: 1rem;
  text-align: left;
}

.pub {
  padding: 1.2rem 1.4rem;
  border: 1px solid #eceef1;
  border-left: 4px solid var(--color-accent);
  border-radius: 10px;
  background-color: var(--color-white);
  box-shadow: rgba(0, 0, 0, 0.04) 0 4px 14px;
}

.pub__meta {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 0.88rem;
  font-variant-numeric: tabular-nums;
  color: var(--color-light-gray);
}

.pub__kind {
  padding: 0 0.55rem;
  border: 1px solid var(--color-accent-strong);
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-accent-strong);
}

.pub__award {
  padding: 0 0.55rem;
  border: 1px solid var(--color-warm-strong);
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-warm-strong);
}

.pub__origin {
  margin-top: 0.15rem;
  font-size: 0.88rem;
  color: #3f4652;
}

.pub__title {
  margin-top: 0.4rem;
  font-size: 1.08rem;
  font-weight: 800;
  line-height: 1.4;
}

.pub__authors {
  margin-top: 0.3rem;
  font-size: 0.92rem;
  color: #3f4652;
}

.pub__authors b {
  font-weight: 800;
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.pub__venue {
  font-size: 0.88rem;
  font-style: italic;
  color: var(--color-light-gray);
}

.pub__desc {
  margin-top: 0.6rem;
  font-size: 0.93rem;
  line-height: 1.65;
  color: #3f4652;
}

.pub__link {
  display: inline-block;
  margin-top: 0.6rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent-strong);
}

.stack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.8rem;
}

.stack-tags li {
  padding: 0.15rem 0.6rem;
  border: 1px solid #d5d9df;
  border-radius: 4px;
  background-color: #f7f8fa;
  font-size: 0.82rem;
  font-weight: 600;
  color: #3f4652;
}

.stack-tags--center {
  justify-content: center;
  margin-top: 1.2rem;
}

.stack-tags--dark li {
  border-color: rgba(143, 216, 222, 0.6);
  background-color: rgba(255, 255, 255, 0.06);
  color: var(--color-white);
}

.company__projects-title {
  margin-top: 1.5rem;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-light-gray);
}

.company__projects {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.6rem;
}

.company__projects a {
  display: block;
  padding: 0.3rem 0.8rem;
  border-radius: 6px;
  background-color: #f1f3f5;
  font-size: 0.9rem;
  color: var(--color-primary);
  transition: background-color 200ms ease;
}

.company__projects a:hover {
  background-color: var(--color-accent);
}

.company__link {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.5rem 1.1rem;
  border-radius: 6px;
  background-color: var(--color-primary);
  font-weight: 600;
  transition: background-color 200ms ease, color 200ms ease;
}

.company__link:hover {
  background-color: var(--color-accent);
  color: var(--color-primary);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0.8rem;
  margin-top: 1.4rem;
}

.metric {
  display: flex;
  flex-direction: column;
  padding: 0.9rem 1rem;
  border-left: 3px solid var(--color-accent);
  border-radius: 4px;
  background-color: #f7f9fa;
}

.metric__value {
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1.3;
  color: var(--color-primary);
}

.metric__label {
  margin-top: 0.2rem;
  font-size: 0.85rem;
  color: var(--color-light-gray);
}

.metrics--large {
  margin: 0 0 1rem;
}

.metrics--large .metric {
  padding: 1.3rem 1.2rem;
}

.metrics--large .metric__value {
  font-size: 1.7rem;
}

.metrics--small {
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  margin: 1rem 0 1.2rem;
}

.metrics--small .metric__value {
  font-size: 1.15rem;
}

/* experience detail page */
.exp {
  text-align: left;
}

.exp__role {
  margin-bottom: 0.8rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-accent);
}

.exp__duties li {
  margin-bottom: 0.5rem;
}

.case-toc {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.2rem 2rem;
  margin: 0.5rem 0 1rem;
  padding: 1.2rem 1.5rem;
  border-radius: 12px;
  background-color: #f5f6f8;
}

.case-toc a {
  display: flex;
  gap: 0.7rem;
  padding: 0.35rem 0;
  color: var(--color-primary);
}

.case-toc a:hover {
  color: var(--color-accent-strong);
}

.case-toc span {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-warm-strong);
}

.case {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 2.5rem;
  padding: 3rem 0;
  border-bottom: 1px solid #eceef1;
  scroll-margin-top: 80px;
}

.case:last-of-type {
  border-bottom: 0;
}

.case__meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-accent-strong);
}

.case__num {
  font-size: 0.85rem;
  color: var(--color-warm-strong);
}

.case__period {
  margin-left: 0.2rem;
  padding: 0 0.5rem;
  border: 1px solid #d5d9df;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--color-light-gray);
}

.case__title {
  margin: 0.3rem 0 0.4rem;
  font-size: 1.5rem;
  font-weight: 800;
  line-height: 1.35;
}

.case__summary {
  margin-bottom: 0.4rem;
  font-size: 1.02rem;
  color: #3f4652;
}

.case .detail__list li {
  margin-bottom: 0.5rem;
  font-size: 0.97rem;
}

.case .tags {
  margin-top: 1rem;
}

.case__link {
  display: inline-block;
  margin-top: 1.2rem;
  font-weight: 600;
  color: var(--color-accent-strong);
}

.case__link:hover {
  text-decoration: underline;
}

.case__media {
  align-self: start;
  position: sticky;
  top: 90px;
}

.case__media {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.case__figure {
  grid-column: 1 / -1;
}

.case__figure--sub {
  grid-column: auto;
}

.case__figure--sub img {
  aspect-ratio: 4 / 3;
}

.case__media img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  padding: 0.5rem;
  object-fit: contain;
  border: 1px solid #eceef1;
  border-radius: 12px;
  background-color: #fafbfc;
  box-shadow: rgba(0, 0, 0, 0.08) 0 6px 20px;
}

.case__media figcaption {
  margin-top: 0.6rem;
  font-size: 0.85rem;
  text-align: center;
  color: var(--color-light-gray);
}

.case__placeholder {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 0.3rem;
  aspect-ratio: 4 / 3;
  padding: 1.5rem;
  border: 2px dashed #d5d9df;
  border-radius: 12px;
  background-color: #fafbfc;
  text-align: center;
  color: var(--color-light-gray);
}

.case__placeholder i {
  font-size: 2.5rem;
  color: #c3c8cf;
}

.case__placeholder__label {
  font-weight: 700;
}

.case__placeholder__hint {
  font-size: 0.88rem;
}

/* ---------- lightbox ---------- */
.lightbox {
  display: flex;
  justify-content: center;
  align-items: center;
  position: fixed;
  inset: 0;
  z-index: 100;
  padding: 4.5rem 5rem 2rem;
  background-color: rgba(5, 10, 19, 0.92);
}

.lightbox[hidden] {
  display: none;
}

body.lightbox-open {
  overflow: hidden;
}

.lightbox__figure {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 100%;
  max-height: 100%;
}

.lightbox__img {
  max-width: 100%;
  max-height: calc(100vh - 9rem);
  border-radius: 8px;
  background-color: var(--color-white);
  object-fit: contain;
}

.lightbox__caption {
  margin-top: 0.8rem;
  font-size: 0.95rem;
  text-align: center;
  color: rgba(255, 255, 255, 0.85);
}

.lightbox__close,
.lightbox__nav {
  display: flex;
  justify-content: center;
  align-items: center;
  position: absolute;
  width: 3rem;
  height: 3rem;
  border-radius: 100%;
  background-color: rgba(255, 255, 255, 0.12);
  font-size: 1.6rem;
  color: var(--color-white);
  cursor: pointer;
  transition: background-color 200ms ease, color 200ms ease;
}

.lightbox__close:hover,
.lightbox__nav:hover,
.lightbox__close:focus-visible,
.lightbox__nav:focus-visible {
  background-color: var(--color-accent);
  color: var(--color-primary);
}

.lightbox__close {
  top: 1rem;
  right: 1rem;
}

.lightbox__nav[hidden] {
  display: none;
}

.lightbox__nav--prev {
  left: 1rem;
}

.lightbox__nav--next {
  right: 1rem;
}

.case__media a,
.detail__figure a {
  cursor: zoom-in;
}

/* ---------- misc ---------- */
.arrow-up {
  position: fixed;
  bottom: 3rem;
  right: 3rem;
  width: 4.5rem;
  height: 4.5rem;
  border-radius: 100%;
  box-shadow: 5px 5px 0px 0px var(--color-accent);
  background-color: var(--color-primary);
  font-size: 3rem;
  line-height: 4.5rem;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 300ms ease-in;
  z-index: 5;
}

.back-home {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  position: fixed;
  bottom: 3.6rem;
  left: 3rem;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  background-color: var(--color-primary);
  box-shadow: rgba(0, 0, 0, 0.18) 0 8px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-white);
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity 250ms ease, transform 250ms ease, background-color 200ms ease;
  z-index: 5;
}

.back-home.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-home:hover {
  background-color: var(--color-accent-strong);
}

.arrow-up.show {
  opacity: 1;
  pointer-events: auto;
}

#contact {
  position: relative;
  padding-top: 6rem;
  background-color: var(--color-primary);
  color: var(--color-text);
}

#contact::after {
  overflow: hidden;
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: calc(100% + 1.3px);
  height: 70px;
  background-color: var(--color-white);
  line-height: 0;
  mask: var(--divider-arrow);
  -webkit-mask: var(--divider-arrow);
}

.contact__links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  padding: 1rem;
  font-size: 2rem;
}

.contact__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.3rem;
  min-width: 4.5rem;
  transition: color 250ms ease-in;
}

.contact__label {
  font-size: 0.75rem;
  opacity: 0.75;
}

.contact__link:hover {
  color: var(--color-accent);
}

@media screen and (max-width: 1024px) {
  .projects {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .case {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .case__media {
    position: static;
    max-width: 560px;
  }
}

@media screen and (max-width: 768px) {
  .section {
    padding: 4rem 1rem;
  }

  .title {
    font-size: 2rem;
  }

  .description {
    font-size: 1rem;
  }

  .header {
    flex-direction: column;
    align-items: start;
  }

  .header__toggle {
    display: block;
  }

  .header__menu {
    display: none;
    flex-direction: column;
    margin: 1rem 4rem;
    gap: 1rem;
    text-align: center;
  }

  .header__menu.open {
    display: flex;
    background-color: var(--color-primary);
  }

  .header__lang {
    justify-content: center;
    margin: 0 0 0.5rem;
    border-left: 0;
  }

  .header__nav {
    width: 100%;
  }

  #home {
    padding-bottom: 3rem;
  }

  .home__avatar {
    width: 180px;
    height: 180px;
  }

  .home__title {
    margin-bottom: 0.5rem;
    font-size: 2.5rem;
  }

  .home__description {
    font-size: 1rem;
  }

  .majors {
    flex-direction: column;
    align-items: center;
  }

  .major {
    width: 100%;
  }

  .about__intro {
    font-size: 1.1rem;
  }

  .competencies,
  .case-toc {
    grid-template-columns: 1fr;
  }

  .company {
    padding: 1.5rem 1.2rem;
  }

  .company__head {
    flex-direction: column-reverse;
    gap: 0.2rem;
  }

  .case__title {
    font-size: 1.3rem;
  }

  .timeline__item,
  .timeline--compact .timeline__item {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }

  .about__columns,
  .detail__columns {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .awards--academic {
    grid-template-columns: 1fr;
  }

  .award {
    grid-template-columns: 88px 1fr;
    gap: 1rem;
    padding: 1rem;
  }

  .award__title {
    font-size: 1.05rem;
  }

  .skills {
    grid-template-columns: 1fr;
    margin: 2rem 0;
  }

  .skills__coding {
    grid-row: auto;
  }

  .categories {
    flex-direction: column;
    margin: 2rem 0;
  }

  .category {
    width: 100%;
  }

  .categories--tech {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
  }

  .categories--tech .category {
    width: auto;
    padding: 0.4rem 0.8rem;
    font-size: 0.9rem;
  }

  .projects {
    grid-template-columns: 1fr;
  }

  .detail__title {
    font-size: 2rem;
  }

  .detail__nav {
    grid-template-columns: 1fr;
    justify-items: center;
  }

  .detail__nav > :first-child,
  .detail__nav > :last-child {
    justify-self: center;
  }

  .lightbox {
    padding: 4rem 0.8rem 1.5rem;
  }

  .lightbox__nav {
    top: auto;
    bottom: 1rem;
  }

  .back-home {
    bottom: 1.8rem;
    left: 1.2rem;
    padding: 0.6rem 1rem;
    font-size: 0.88rem;
  }

  .arrow-up {
    bottom: 1.5rem;
    right: 1.5rem;
    width: 3rem;
    height: 3rem;
    font-size: 2rem;
    line-height: 3rem;
  }
}