/* ==========================================================================
   Design tokens
   ========================================================================== */
:root {
  --color-bg: #ffffff;
  --color-text: #111111;
  --color-muted: #8a8a8a;
  --color-line: #e6e6e6;
  --color-line-strong: #111111;

  --font-display: "Noto Serif JP", "Noto Sans JP", "Hiragino Sans", sans-serif;
  --font-body: "Noto Sans JP", "Hiragino Kaku Gothic ProN", sans-serif;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;
  --space-7: 160px;

  --container: 1200px;
  --nav-h: 88px;
  --ease: cubic-bezier(0.65, 0, 0.35, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  margin: 0;
  letter-spacing: 0.01em;
}

p {
  margin: 0;
}

:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 4px;
}

.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (max-width: 640px) {
  .wrap {
    padding: 0 var(--space-3);
  }
}

/* ==========================================================================
   Eyebrow / labels
   ========================================================================== */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 16px;
  height: 1px;
  background: var(--color-muted);
}

/* ==========================================================================
   Header / nav
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.logo {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.logo span {
  color: var(--color-muted);
  font-weight: 400;
  margin-left: 6px;
}

.nav-list {
  display: flex;
  gap: var(--space-4);
}

.nav-list a {
  position: relative;
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  padding: 6px 0;
  transition: color 0.3s var(--ease);
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--color-text);
  transition: right 0.35s var(--ease);
}

.nav-list a:hover,
.nav-list a:focus-visible,
.nav-list a[aria-current="page"] {
  color: var(--color-text);
}

.nav-list a:hover::after,
.nav-list a:focus-visible::after,
.nav-list a[aria-current="page"]::after {
  right: 0;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle .bar {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--color-text);
  margin: 5px 0;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
  }

  .nav-list {
    position: fixed;
    inset: var(--nav-h) 0 0 0;
    flex-direction: column;
    gap: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(14px);
    padding: var(--space-3) var(--space-3);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  }

  .nav-list.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .nav-list a {
    display: block;
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--color-line);
    font-size: 15px;
  }

  body.nav-open .nav-toggle .bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  body.nav-open .nav-toggle .bar:nth-child(2) {
    opacity: 0;
  }
  body.nav-open .nav-toggle .bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--color-line);
  padding: var(--space-4) 0;
  margin-top: var(--space-7);
}

.site-footer .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.footer-note {
  font-size: 13px;
  color: var(--color-muted);
  letter-spacing: 0.03em;
}

.footer-links {
  display: flex;
  gap: var(--space-3);
}

.footer-links a {
  font-size: 13px;
  color: var(--color-muted);
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.footer-links a:hover {
  color: var(--color-text);
  border-color: var(--color-text);
}

/* ==========================================================================
   Reveal-on-scroll
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

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

/* ==========================================================================
   Hero (index)
   ========================================================================== */
.hero {
  padding: var(--space-6) 0 var(--space-5);
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-title {
  font-size: clamp(40px, 8vw, 96px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin-top: var(--space-3);
}

.hero-title .line {
  display: block;
  overflow: hidden;
}

.hero-title .line span {
  display: block;
  transform: translateY(110%);
  transition: transform 0.9s var(--ease);
}

.hero-title.is-visible .line span {
  transform: translateY(0);
}

.hero-title .line:nth-child(1) span { transition-delay: 0.05s; }
.hero-title .line:nth-child(2) span { transition-delay: 0.15s; }
.hero-title .line:nth-child(3) span { transition-delay: 0.25s; }

.hero-sub {
  margin-top: var(--space-4);
  max-width: 480px;
  font-size: 17px;
  color: var(--color-muted);
}

.hero-meta {
  margin-top: var(--space-6);
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  border-top: 1px solid var(--color-line);
  padding-top: var(--space-3);
}

.hero-meta dt {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.hero-meta dd {
  margin: 6px 0 0;
  font-size: 15px;
}

/* ==========================================================================
   Section shell
   ========================================================================== */
.section {
  padding: var(--space-6) 0;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-line);
  padding-bottom: var(--space-3);
}

.section-title {
  font-size: clamp(26px, 4vw, 40px);
}

.section-link {
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  white-space: nowrap;
  border-bottom: 1px solid var(--color-muted);
  padding-bottom: 2px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.section-link:hover {
  color: var(--color-text);
  border-color: var(--color-text);
}

.page-subtitle {
  margin-top: 16px;
  max-width: 760px;
  font-size: 18px;
  line-height: 1.8;
  color: var(--color-muted);
}

.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 14px 28px;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text);
  border: 1px solid var(--color-text);
  background: transparent;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.cta-button:hover,
.button-link:hover {
  background: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}

.instagram-card,
.feature-card {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--color-line);
  border-radius: 20px;
  padding: var(--space-5);
  max-width: 900px;
  margin: 0 auto;
}

.instagram-card p,
.feature-card p {
  color: var(--color-text);
  font-size: 17px;
  line-height: 1.8;
}

.feature-grid {
  display: grid;
  gap: var(--space-5);
}

.feature-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.card-title {
  font-size: clamp(24px, 3vw, 32px);
  margin: 0;
}

.card-text {
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-muted);
}

@media (min-width: 860px) {
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ==========================================================================
   Work list (shared: index preview + works page)
   ========================================================================== */
.work-list {
  display: flex;
  flex-direction: column;
}

.work-row {
  display: grid;
  grid-template-columns: 64px 1fr auto auto;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-line);
  cursor: pointer;
  transition: padding-left 0.4s var(--ease);
}

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

.work-row:hover {
  padding-left: var(--space-2);
}

.work-index {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--color-muted);
}

.work-name {
  font-family: var(--font-display);
  font-size: clamp(20px, 3vw, 30px);
  transition: opacity 0.3s var(--ease);
}

.work-row:hover .work-name {
  opacity: 0.55;
}

.work-tags {
  display: flex;
  gap: var(--space-1);
  flex-wrap: wrap;
  justify-content: flex-end;
}

.work-tag {
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-muted);
  border: 1px solid var(--color-line);
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.work-year {
  font-size: 13px;
  color: var(--color-muted);
  min-width: 44px;
  text-align: right;
}

@media (max-width: 640px) {
  .work-row {
    grid-template-columns: 32px 1fr;
    row-gap: 8px;
  }
  .work-tags,
  .work-year {
    grid-column: 2 / 3;
    justify-content: flex-start;
    text-align: left;
  }
}

/* ==========================================================================
   Empty state (e.g. works coming soon)
   ========================================================================== */
.empty-state {
  padding: var(--space-6) 0;
  text-align: center;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.empty-state .eyebrow {
  justify-content: center;
}

.empty-state .eyebrow::before {
  display: none;
}

.empty-state-text {
  margin-top: var(--space-3);
  font-family: var(--font-display);
  font-size: clamp(18px, 2.4vw, 24px);
  line-height: 1.7;
  color: var(--color-muted);
}

/* ==========================================================================
   Works page filters + grid
   ========================================================================== */
.filter-bar {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-5);
}

.filter-btn {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.06em;
  background: none;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 8px 18px;
  color: var(--color-muted);
  cursor: pointer;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease), background 0.25s var(--ease);
}

.filter-btn:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}

.filter-btn.is-active {
  background: var(--color-text);
  border-color: var(--color-text);
  color: var(--color-bg);
}

.work-count {
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: var(--space-3);
}

/* ==========================================================================
   About page
   ========================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: var(--space-6);
}

@media (max-width: 860px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

.portrait {
  aspect-ratio: 3 / 4;
  background: #f2f2f2;
  border: 1px solid var(--color-line);
  overflow: hidden;
}

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

.about-lede {
  font-family: var(--font-display);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.55;
  max-width: 640px;
}

.about-body {
  margin-top: var(--space-4);
  max-width: 640px;
  color: var(--color-text);
}

.about-body p + p {
  margin-top: var(--space-3);
}

.skill-table {
  margin-top: var(--space-4);
  border-top: 1px solid var(--color-line);
}

.skill-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-line);
}

.skill-row dt {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.skill-row dd {
  margin: 0;
  font-size: 15px;
}

.timeline {
  margin-top: var(--space-4);
  border-top: 1px solid var(--color-line);
}

.timeline-row {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 15px;
}

.timeline-row .year {
  color: var(--color-muted);
  font-family: var(--font-display);
  font-size: 13px;
}

/* ==========================================================================
   Contact page
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

@media (max-width: 860px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
}

.contact-lede {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.25;
  max-width: 460px;
}

.contact-list {
  margin-top: var(--space-4);
}

.contact-list li {
  border-top: 1px solid var(--color-line);
  padding: var(--space-2) 0;
}

.contact-list li:last-child {
  border-bottom: 1px solid var(--color-line);
}

.contact-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 15px;
}

.contact-list .label {
  color: var(--color-muted);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.field {
  margin-bottom: var(--space-3);
}

.field label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: var(--space-1);
}

.field input,
.field textarea {
  width: 100%;
  border: none;
  border-bottom: 1px solid var(--color-line);
  padding: 10px 2px;
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-text);
  background: transparent;
  transition: border-color 0.25s var(--ease);
  resize: vertical;
}

.field input:focus,
.field textarea:focus {
  border-color: var(--color-text);
  outline: none;
}

.field textarea {
  min-height: 140px;
}

.submit-btn {
  margin-top: var(--space-2);
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: var(--color-text);
  color: var(--color-bg);
  border: 1px solid var(--color-text);
  padding: 14px 32px;
  cursor: pointer;
  transition: background 0.25s var(--ease), color 0.25s var(--ease);
}

.submit-btn:hover {
  background: var(--color-bg);
  color: var(--color-text);
}

.form-status {
  margin-top: var(--space-2);
  font-size: 13px;
  color: var(--color-muted);
  min-height: 1.5em;
}

/* ==========================================================================
   Page intro (about / works / contact top)
   ========================================================================== */
.page-intro {
  padding: var(--space-5) 0 var(--space-4);
  border-bottom: 1px solid var(--color-line);
  margin-bottom: var(--space-5);
}

.page-title {
  font-size: clamp(34px, 6vw, 56px);
  margin-top: var(--space-2);
}