:root {
  --ink: #17345c;
  --ink-soft: #62728a;
  --paper: #fbfaf7;
  --paper-blue: #eff6fb;
  --blue: #198bd9;
  --blue-deep: #0f61b7;
  --blue-light: #86c9ee;
  --orange: #f0a272;
  --orange-light: #f7d2bb;
  --line: rgba(23, 52, 92, 0.18);
  --card: rgba(255, 255, 255, 0.62);
  --radius: 22px;
  --shadow: 0 18px 60px rgba(42, 72, 102, 0.08);
  --mainblue: #138CFA;
  --mainorange: #FD9466;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 120%;
  background: var(--paper);
  overscroll-behavior-y: none;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Prompt", "Noto Sans JP", sans-serif;
  font-weight: 300;
  line-height: 1.6;
  overflow-x: hidden;
}

html[lang="ja"] body {
  font-family: "Zen Old Mincho", serif;
  font-weight: 400;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 99;
  opacity: 0.19;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='.09'/%3E%3C/svg%3E");
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.section-shell {
  width: min(1180px, calc(100% - 64px));
  margin-inline: auto;
}

.site-header {
  height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  padding-inline: max(32px, calc((100% - 1180px) / 2));
  z-index: 50;
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: rgba(251, 250, 247, 0);
  backdrop-filter: blur(0px);
  -webkit-backdrop-filter: blur(0px);
  transition: background .4s ease, backdrop-filter .4s ease, -webkit-backdrop-filter .4s ease;
}

.site-header.is-scrolled::before {
  background: rgba(251, 250, 247, 0.68);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.brand {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.34em;
}

html[lang="en"] .brand {
  font-family: "Alata", sans-serif;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 40px;
}

.site-nav a {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  padding: 4px 12px;
  border-radius: 999px;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.site-nav a:hover {
  background-color: var(--blue-deep);
  color: #fff;
}

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

.lang-switch__link {
  border: 1px solid var(--line);
}

.lang-switch .lang-switch__link:hover {
  background-color: var(--mainblue);
  border-color: var(--mainblue);
  color: #fff;
}

.lang-switch .lang-switch__link.is-active,
.lang-switch .lang-switch__link.is-active:hover {
  background-color: var(--mainorange);
  color: #fff;
  border-color: var(--mainorange);
}

.menu-toggle {
  display: none;
  border: 0;
  background: transparent;
  padding: 8px;
  position: relative;
  width: 38px;
  height: 38px;
}

.menu-toggle span {
  position: absolute;
  left: 8px;
  width: 22px;
  height: 1px;
  background: var(--ink);
  transition: transform .25s ease, top .25s ease;
}

.menu-toggle span:first-child {
  top: 14px;
}

.menu-toggle span:last-child {
  top: 23px;
}

.menu-toggle.is-active span:first-child {
  top: 18px;
  transform: rotate(45deg);
}

.menu-toggle.is-active span:last-child {
  top: 18px;
  transform: rotate(-45deg);
}

.hero {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-radius: 2px;
  isolation: isolate;
  background-image: url("images/hero-bg-desktop.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 25vh;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(to bottom, transparent, var(--paper));
}

.hero-inner {
  width: 78%;
  margin-inline: auto;
  position: relative;
  z-index: 2;
}

.hero-copy {
  padding-left: 4px;
  max-width: 620px;
  position: relative;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.6rem, 3vw, 3.8rem);
  line-height: 0.96;
  font-weight: 300;
  letter-spacing: 0.14em;
  white-space: nowrap;
}

.hero h1 span {
  font-weight: 200;
}

.hero-role {
  margin: 18px 0 0;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.22em;
}

.hero-lead {
  margin: 30px 0 0;
  color: var(--ink-soft);
  font-size: 1rem;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 24px;
  margin-top: 30px;
  padding: 13px 24px;
  border-radius: 999px;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

.button--primary {
  color: #fff;
  background: linear-gradient(90deg, var(--blue-deep), var(--blue), #5da5c8);
  box-shadow: 0 9px 25px rgba(35, 116, 177, 0.22);
  transition: transform .25s ease, box-shadow .25s ease;
}

.button--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(35, 116, 177, 0.3);
}

.scroll-note {
  position: absolute;
  right: 36px;
  bottom: 56px;
  writing-mode: vertical-rl;
  font-size: 0.55rem;
  letter-spacing: 0.35em;
  opacity: .55;
}

.scroll-note::after {
  content: "";
  display: block;
  width: 1px;
  height: 46px;
  margin: 10px auto 0;
  background: currentColor;
  animation: scroll-line 1.8s ease-in-out infinite;
}

@keyframes scroll-line {
  0% {
    transform: scaleY(0);
    transform-origin: top;
    opacity: 0;
  }
  40% {
    transform: scaleY(1);
    transform-origin: top;
    opacity: 1;
  }
  60% {
    transform: scaleY(1);
    transform-origin: bottom;
    opacity: 1;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
    opacity: 0;
  }
}

.work,
.about,
.skills,
.experience {
  padding-top: 94px;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 36px;
}

.section-heading__title {
  display: flex;
  align-items: center;
  gap: 18px;
}

.section-heading__title > span {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  opacity: .6;
}

.section-heading__title i {
  width: 54px;
  height: 1px;
  background: var(--line);
}

.section-heading h2 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 400;
  letter-spacing: 0.24em;
}

.project-grid {
  display: grid;
  gap: 40px;
}

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

.project-grid--small {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 28px;
}

.project-card__visual {
  display: block;
  aspect-ratio: 1.52 / 1;
  position: relative;
  overflow: hidden;
  background: #eef3f5;
  box-shadow: var(--shadow);
  transition: opacity .25s ease;
}

.project-card__visual:hover {
  opacity: .7;
}

.project-card__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}

.project-card--large .project-card__visual {
  aspect-ratio: 1.55 / 1;
}

.project-card__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  /* border: 1px solid rgba(255,255,255,.48); */
  pointer-events: none;
}

.project-card__external-icon {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 4;
  color: #fff;
  font-size: .85rem;
  pointer-events: none;
}

.project-card__external-icon i {
  /* color: var(--blue-light); */
  color: #aacbde;
}
.project-card__external-icon.github {
  font-size: 1.4em;
}
.project-card__meta {
  margin-top: 12px;
}

.project-card__meta-top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 20px;
}

.project-card__meta-top h3 {
  flex: 1;
  min-width: 0;
}

.project-card__meta h3 {
  margin: 0;
  font-size: .92rem;
  font-weight: 500;
}

.project-card__desc {
  margin: 6px 0 0;
  font-size: .76rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.tech-tags li {
  font-size: .64rem;
  padding: 3px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--ink-soft);
}

.project-card__meta-top > span {
  font-size: .64rem;
  letter-spacing: .02em;
  color: var(--ink-soft);
  text-align: right;
  /* max-width: 42%; */
  flex-shrink: 0;
  line-height: 1.5;
}

.project-visual__copy {
  position: absolute;
  left: 11%;
  top: 35%;
  z-index: 3;
  color: white;
}

.project-visual__copy--dark {
  color: var(--ink);
}

.project-visual__copy--top {
  top: 18%;
}

.project-visual__copy span {
  display: block;
  margin-bottom: 16px;
  font-size: .52rem;
  letter-spacing: .26em;
  opacity: .72;
}

.project-visual__copy strong {
  display: block;
  font-size: 1.8rem;
  font-weight: 400;
  letter-spacing: .08em;
}

.project-visual__copy small {
  display: block;
  margin-top: 10px;
  font-size: .68rem;
  line-height: 1.7;
  letter-spacing: .08em;
  opacity: .74;
}

.project-visual--tossibly {
  background: linear-gradient(150deg, #f4eee6 0%, #f7f7f4 48%, #d6e3ea 100%);
}

.project-visual--kitly {
  background: linear-gradient(150deg, #f4eee6 0%, #f7f7f4 48%, #d6e3ea 100%);
}

.project-visual--web01 {
  background: linear-gradient(150deg, #f4eee6 0%, #f7f7f4 48%, #d6e3ea 100%);
}

.project-visual--web02 {
  background: linear-gradient(150deg, #f4eee6 0%, #f7f7f4 48%, #d6e3ea 100%);
}

.project-visual--web03 {
  background: linear-gradient(150deg, #f4eee6 0%, #f7f7f4 48%, #d6e3ea 100%);
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, .9fr);
  gap: 80px;
  align-items: center;
}

.about-kicker {
  font-size: .62rem;
  letter-spacing: .28em;
  font-weight: 500;
  opacity: .58;
}

.about-copy h3 {
  margin: 15px 0 30px;
  font-size: clamp(1.5rem, 2.9vw, 2.6rem);
  font-weight: 300;
  line-height: 1.25;
  letter-spacing: .05em;
}

.about-copy > p:not(.about-kicker) {
  color: var(--ink-soft);
  max-width: 560px;
  font-size: .95rem;
}

.about-art {
  width: 90%;
  aspect-ratio: 1.45 / 1;
  position: relative;
  overflow: hidden;
  background: linear-gradient(140deg, #f1eee7 0%, #eef4f5 58%, #d7e7ed 100%);
  box-shadow: var(--shadow);
}

.about-art img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
}

.skill-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.skill-card {
  min-height: 190px;
  border-radius: var(--radius);
  padding: 30px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  /* background: linear-gradient(145deg, rgba(255,255,255,.84), rgba(232,241,246,.7)); */
  background: linear-gradient(145deg, rgba(255, 248, 243, 0.88), rgba(238, 244, 247, 0.72));
  border: 1px solid rgba(255,255,255,.7);
  box-shadow: var(--shadow);
}

.skill-card__header {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  width: 100%;
}

.skill-card__icon {
  font-size: 1.5rem;
}

.skill-card h3 {
  margin: 0;
  font-size: .9rem;
  letter-spacing: .12em;
  width: fit-content;
}

.skill-card__content {
  width: max-content;
  max-width: 100%;
  margin: 0 auto;
  text-align: left;
}

.skill-card__content p {
  margin: 4px 0;
  color: var(--ink-soft);
  font-size: .82rem;
}

.experience {
  padding-bottom: 105px;
}

.experience-list {
  border-top: 1px solid var(--line);
}

.experience-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.experience-row > span {
  font-size: .65rem;
  letter-spacing: .22em;
  color: var(--ink-soft);
}

.experience-row h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
}

.experience-row__company {
  margin: 4px 0 0;
  font-size: .88rem;
  font-weight: 500;
  color: var(--ink);
}

.experience-row p {
  margin: 5px 0 0;
  font-size: .84rem;
  color: var(--ink-soft);
}

.contact {
  min-height: 480px;
  position: relative;
  overflow: hidden;
  background-image: url("images/footer-desktop.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.contact::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 25vh;
  z-index: 0;
  pointer-events: none;
  background: linear-gradient(to bottom, var(--paper), transparent);
}

.contact-inner {
  min-height: 480px;
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  align-items: center;
  gap: 90px;
  position: relative;
  z-index: 1;
}

.contact-copy h3 {
  margin: 16px 0;
  font-size: clamp(1.62rem, 3.24vw, 2.88rem);
  line-height: 1.2;
  font-weight: 300;
  letter-spacing: .05em;
}

html[lang="ja"] .contact-copy h3 {
  font-size: clamp(1.3rem, 2.4vw, 2.1rem);
  white-space: nowrap;
}

.contact-copy > p {
  max-width: 430px;
  font-size: .9rem;
  color: rgba(23,52,92,.72);
}

.contact-links {
  padding-left: 54px;
}

.contact-links a {
  display: grid;
  grid-template-columns: 62px 1fr 24px;
  align-items: center;
  gap: 18px;
  padding: 18px 16px;
  margin: 0 -16px;
  border-bottom: 1px solid rgba(23,52,92,.15);
  /* border-radius: 6px; */
  transition: background-color .25s ease;
}

.contact-links a:first-child {
  border-top: 1px solid rgba(23,52,92,.15);
}

.contact-links__icon {
  width: 62px;
  height: 62px;
  position: relative;
  z-index: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: #fff;
  font-size: 1.3rem;
}

.contact-links__icon::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -9px;
  background-image: url("images/blur-blue.png");
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  pointer-events: none;
  mix-blend-mode: multiply;
}

.contact-links strong {
  font-size: .8rem;
  font-weight: 400;
  color: rgba(23,52,92,.7);
}

.contact-links__arrow {
  font-style: normal;
  transition: transform .2s ease;
}

.contact-links a:hover {
  background-color: rgba(244, 162, 97, 0.3);
}

/* .contact-links a:hover span,
.contact-links a:hover strong,
.contact-links a:hover i {
  color: #fff;
} */

.contact-links a:hover .contact-links__arrow {
  transform: translateX(4px);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s ease, transform .7s ease;
}

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

@media (max-width: 900px) {
  .section-shell {
    width: min(100% - 36px, 760px);
  }

  .site-header {
    height: 72px;
    padding-inline: max(18px, calc((100% - 760px) / 2));
  }

  .menu-toggle {
    display: block;
    position: relative;
    z-index: 60;
  }

  .site-nav {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100vh;
    z-index: 55;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 28px;
    background: rgba(255, 255, 255, .85);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .25s ease, visibility .25s ease;
  }

  .site-nav.is-open {
    opacity: 1;
    visibility: visible;
  }

  .site-nav a {
    font-size: 1.1rem;
    padding: 4px 24px;
    text-align: center;
  }

  .hero {
    min-height: 0;
    height: 75vh;
    background-image: url("images/hero-bg-mobile.png");
  }

  #work {
    padding-top: 0;
  }

  #work .section-heading,
  #work .project-grid--featured,
  #selected-works .section-heading,
  #selected-works .project-grid--small,
  #about .section-heading,
  #about .about-grid,
  #skills .section-heading,
  #skills .skill-grid,
  .experience .section-heading,
  .experience .experience-list {
    width: 90%;
    margin-inline: auto;
  }

  .section-heading {
    margin-bottom: 22px;
  }

  #selected-works .section-heading {
    margin-bottom: 20px;
  }

  .project-card__meta-top {
    flex-direction: column;
    gap: 8px;
  }

  .project-card__meta-top > span {
    text-align: left;
  }

  .hero-inner {
    width: min(100% - 56px, 760px);
  }

  .hero h1 {
    font-size: clamp(2.2rem, 6vw, 3.4rem);
  }

  .scroll-note {
    display: none;
  }

  .contact {
    background-image: url("images/footer-mobile.png");
  }

  .project-grid--featured,
  .project-grid--small,
  .skill-grid,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .project-grid--small {
    margin-top: 22px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .about-art {
    max-width: 650px;
  }

  .contact-inner {
    gap: 44px;
    padding-top: 80px;
    padding-bottom: 80px;
  }

  .contact-copy,
  .contact-links {
    width: 90%;
    margin-inline: auto;
  }

  .contact-links {
    border-left: 0;
    padding-left: 0;
  }

  .reveal.is-visible {
    margin: 0 auto;
  }

  .skill-card {
    width: 100%;
  }

  .experience {
    padding-bottom: 0;
  }
}

/* Tablet only — between the mobile breakpoint above and the phone-specific one below */
@media (min-width: 621px) and (max-width: 900px) {
  .project-grid--featured,
  .project-grid--small {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about-art {
    width: 70%;
  }

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

  .experience-list {
    border-top: 0;
  }

  .contact-links a:first-child {
    border-top: 0;
  }
}

@media (max-width: 620px) {
  .section-shell {
    width: min(100% - 28px, 560px);
  }

  .site-header {
    padding-inline: max(14px, calc((100% - 560px) / 2));
  }

  .hero {
    height: 90vh;
  }

  .hero-inner {
    width: min(100% - 40px, 560px);
  }

  .hero h1 {
    font-size: clamp(1.7rem, 9vw, 2.6rem);
    letter-spacing: .08em;
  }

  .hero-role {
    font-size: .82rem;
    letter-spacing: .16em;
  }

  .hero-lead br {
    display: none;
  }

  .section-heading {
    align-items: flex-start;
  }

  .section-heading__title {
    gap: 12px;
  }

  .section-heading__title i {
    width: 28px;
  }

  .section-heading h2 {
    font-size: 1.05rem;
  }

  .project-card__visual,
  .project-card--large .project-card__visual {
    aspect-ratio: 1.25 / 1;
  }

  .project-visual__copy strong {
    font-size: 1.45rem;
  }

  .skill-card {
    min-height: 0;
  }

  .experience-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .experience-list {
    border-top: 0;
  }

  .contact-links a {
    grid-template-columns: 72px 1fr 18px;
    gap: 10px;
  }

  .contact-links a:first-child {
    border-top: 0;
  }

  .contact-links strong {
    overflow-wrap: anywhere;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}