@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700&family=M+PLUS+1p:wght@400;500;700&display=swap");

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

:root {
  --color-bg: #ffffff;
  --color-text: #111111;
  --color-muted: #555555;
  --color-border: #e0e0e0;
  --color-accent: #111111;
  --font-sans: "Noto Sans JP", "M PLUS 1p", sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --max-width: 1100px;
  --font-size-base: 1rem;
  --font-size-lg: 1.375rem;
  --font-size-xl: 2rem;
  --font-size-hero: 2.75rem;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

ul {
  list-style: none;
}

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

main {
  flex: 1;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: var(--font-size-lg);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.site-logo-mark {
  display: block;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.site-logo:hover {
  opacity: 0.7;
}

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

.nav-list a {
  font-size: var(--font-size-base);
  position: relative;
  padding-bottom: 2px;
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-text);
  transition: width var(--transition);
}

.nav-list a:hover::after,
.nav-list a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.nav-toggle-icon {
  display: block;
  position: relative;
  width: 24px;
  height: 18px;
  margin: 0 auto;
}

.nav-toggle-icon span {
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transform-origin: center;
  transition: top var(--transition), transform var(--transition), opacity var(--transition);
}

.nav-toggle-icon span:nth-child(1) {
  top: 0;
}

.nav-toggle-icon span:nth-child(2) {
  top: 8px;
}

.nav-toggle-icon span:nth-child(3) {
  top: 16px;
}

.nav-toggle.open .nav-toggle-icon span:nth-child(1) {
  top: 8px;
  transform: rotate(45deg);
}

.nav-toggle.open .nav-toggle-icon span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open .nav-toggle-icon span:nth-child(3) {
  top: 8px;
  transform: rotate(-45deg);
}

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

.footer-inner {
  text-align: center;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-sm);
}

.footer-links a:hover {
  opacity: 0.7;
}

/* ===== Hero (Top) ===== */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 57px);
  min-height: calc(100dvh - 57px);
  padding: var(--space-xl) var(--space-md);
  text-align: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url("/images/hero.jpg");
  background-size: cover;
  background-position: center 85%;
  background-repeat: no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.78) 0%,
    rgba(255, 255, 255, 0.42) 42%,
    rgba(255, 255, 255, 0.22) 100%
  );
}

.hero-inner {
  position: relative;
  z-index: 1;
  transform: translateY(-5vh);
}

.hero-catch {
  font-size: var(--font-size-hero);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.4;
  margin-bottom: var(--space-md);
}

.hero-catch-char,
.hero-sub-char {
  display: inline-block;
  opacity: 0;
  animation: hero-char-fade-in 1.2s ease forwards;
}

@keyframes hero-char-fade-in {
  to {
    opacity: 1;
  }
}

.hero-sub {
  font-size: var(--font-size-base);
  color: var(--color-muted);
  max-width: 640px;
  margin: 0 auto var(--space-lg);
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  justify-content: center;
  opacity: 0;
  animation: hero-char-fade-in 1.6s ease forwards;
}

/* ===== Intro (Home) ===== */
.intro-section {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
}

.intro {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  max-width: 720px;
  margin: 0 auto;
}

.intro-avatar {
  flex-shrink: 0;
  width: 128px;
  height: 128px;
}

.intro-avatar-img,
.profile-image-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.intro-name {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.intro-profile {
  color: var(--color-muted);
  font-size: var(--font-size-base);
  line-height: 1.8;
}

/* ===== Featured Works (Home) ===== */
.featured-works-section {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
}

.section-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-lg);
}

.featured-works-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  max-width: var(--max-width);
  margin: 0 auto;
}

.featured-work-row {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.featured-work-row:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.featured-work-row-image {
  flex: 0 0 48%;
  aspect-ratio: 3 / 2;
  background-color: #f5f5f5;
  overflow: hidden;
}

.featured-work-row-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.featured-work-row:hover .featured-work-row-image img {
  transform: scale(1.03);
}

.featured-work-row-body {
  flex: 1;
  padding: var(--space-md) var(--space-md) var(--space-md) 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-md);
}

.featured-work-row-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
}

.featured-work-row-empty {
  border-style: dashed;
  background-color: #fafafa;
}

.featured-work-row-empty .featured-work-row-image {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  font-size: var(--font-size-lg);
}

.featured-work-row-empty:hover {
  box-shadow: none;
}

.section-title.reveal,
.featured-work-row.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.section-title.reveal.visible,
.featured-work-row.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== CTA ===== */
.cta-section {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
}

.cta-inner {
  text-align: center;
}

.cta-lead {
  margin: 0 0 var(--space-sm);
  color: var(--color-muted);
  font-size: var(--font-size-base);
  line-height: 1.8;
}

.cta-inner.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 0.85rem 2rem;
  font-size: var(--font-size-base);
  font-weight: 500;
  border: 2px solid var(--color-text);
  background-color: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
}

.btn:hover {
  background-color: var(--color-text);
  color: var(--color-bg);
  transform: translateY(-2px);
}

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

.btn-primary:hover {
  background-color: transparent;
  color: var(--color-text);
}

.btn-small {
  padding: 0.6rem 1.4rem;
  font-size: 1rem;
}

.btn-large {
  padding: 1.1rem 3rem;
  font-size: var(--font-size-lg);
}

.btn-disabled {
  opacity: 0.4;
  pointer-events: none;
  cursor: default;
}

/* ===== Page Header ===== */
.page-header {
  padding: var(--space-lg) 0 var(--space-md);
}

.page-title {
  font-size: var(--font-size-xl);
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.page-lead {
  color: var(--color-muted);
  font-size: var(--font-size-base);
}

/* ===== Works Grid ===== */
.works-section {
  padding-bottom: var(--space-xl);
}

.works-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.work-card {
  display: block;
  border: 1px solid var(--color-border);
  overflow: hidden;
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease, box-shadow var(--transition);
  cursor: pointer;
}

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

.work-card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.work-card-image {
  aspect-ratio: 3 / 2;
  background-color: #f5f5f5;
  overflow: hidden;
}

.work-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.work-card:hover .work-card-image img {
  transform: scale(1.03);
}

.work-card-body {
  padding: var(--space-lg);
}

.work-card-tag {
  display: inline-block;
  font-size: 0.95rem;
  color: var(--color-muted);
  margin-bottom: var(--space-sm);
}

.work-card-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.work-card-desc {
  color: var(--color-muted);
  font-size: var(--font-size-base);
  line-height: 1.8;
}

.work-card-empty {
  border-style: dashed;
  background-color: #fafafa;
  cursor: default;
}

.work-card-empty:hover {
  box-shadow: none;
}

.work-card-empty:hover .work-card-image img {
  transform: none;
}

.work-card-empty .work-card-image {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-muted);
  font-size: var(--font-size-lg);
}

/* ===== Work Detail ===== */
.work-detail-back {
  margin-bottom: var(--space-md);
  font-size: 0.95rem;
}

.work-detail-back a:hover {
  text-decoration: underline;
}

.work-detail-section {
  padding-bottom: var(--space-xl);
}

.work-detail-meta {
  margin-bottom: var(--space-lg);
}

.work-detail-gallery {
  margin-bottom: var(--space-lg);
}

.work-detail-heading {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}

.work-detail-meta p {
  line-height: 1.8;
}

.work-detail-url {
  font-size: var(--font-size-lg);
}

.work-detail-url a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.work-detail-url a:hover {
  opacity: 0.7;
}

.work-detail-images {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.work-detail-figure {
  border: 1px solid var(--color-border);
  overflow: hidden;
}

.work-detail-figure img {
  width: 100%;
}

/* ===== About ===== */
.about-section {
  padding-bottom: var(--space-xl);
}

.about-block {
  margin-bottom: var(--space-lg);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.about-block h2 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}

.about-block p {
  margin-bottom: var(--space-sm);
}

.about-block p:last-child,
.about-list:last-child,
.flow-list:last-child {
  margin-bottom: 0;
}

.about-list {
  margin-top: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.about-list li {
  padding-left: var(--space-sm);
  border-left: 3px solid var(--color-border);
  line-height: 1.8;
}

.about-list strong {
  display: block;
  margin-bottom: 0.15rem;
  font-weight: 600;
}

.flow-list {
  margin-top: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  counter-reset: flow;
}

.flow-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-xs) var(--space-sm);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.flow-item:last-child {
  border-bottom: none;
}

.flow-label {
  font-weight: 600;
  min-width: 6rem;
}

.flow-label::before {
  counter-increment: flow;
  content: counter(flow) ". ";
  color: var(--color-muted);
}

.flow-desc {
  color: var(--color-muted);
  flex: 1;
  min-width: 200px;
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.skill-tag {
  padding: 0.5rem 1.2rem;
  border: 1px solid var(--color-border);
  font-size: 1rem;
}

.skill-set-list {
  margin-top: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  line-height: 1.8;
}

.skill-set-list li {
  padding-left: var(--space-sm);
  border-left: 3px solid var(--color-border);
}

.profile-image {
  width: 160px;
  height: 160px;
  margin-bottom: var(--space-md);
}

/* ===== Contact ===== */
.contact-section {
  padding-bottom: var(--space-xl);
}

.contact-form-wrap {
  margin-bottom: var(--space-lg);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.contact-form-wrap.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.contact-form-wrap h2 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--color-border);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 640px;
}

.contact-form-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-field label {
  font-weight: 500;
}

.form-required {
  margin-left: 0.15rem;
  color: var(--color-text);
  font-weight: 500;
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: inherit;
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-text);
  box-shadow: 0 0 0 3px rgba(17, 17, 17, 0.08);
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: #999999;
}

.form-field textarea {
  resize: vertical;
  min-height: 160px;
}

.form-field input:invalid:not(:placeholder-shown),
.form-field textarea:invalid:not(:placeholder-shown) {
  border-color: #c0392b;
}

.contact-form-actions {
  margin-top: var(--space-xs);
}

.contact-form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.contact-form-status {
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  line-height: 1.7;
}

.contact-form-status.is-success {
  color: #1e6b3a;
  background-color: #edf7f0;
  border: 1px solid #b8dfc4;
}

.contact-form-status.is-error {
  color: #8b2e2e;
  background-color: #fdf0f0;
  border: 1px solid #f0c4c4;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  :root {
    --font-size-hero: 2rem;
    --font-size-xl: 1.6rem;
    --space-lg: 3rem;
    --space-xl: 4rem;
  }

  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: auto;
  }

  nav {
    position: absolute;
    width: 0;
    height: 0;
    overflow: visible;
  }

  .nav-list {
    position: fixed;
    top: 57px;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    flex-direction: column;
    align-items: center;
    padding: var(--space-md);
    gap: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform var(--transition), opacity var(--transition);
    pointer-events: none;
  }

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

  .hero {
    padding: var(--space-lg) var(--space-md);
  }

  .hero-bg {
    background-position: center 44%;
  }

  .hero-inner {
    transform: none;
  }

  .hero-catch {
    letter-spacing: 0.04em;
  }

  .intro {
    flex-direction: column;
    text-align: center;
    gap: var(--space-md);
  }

  .intro-avatar {
    width: 106px;
    height: 106px;
  }

  .featured-work-row {
    flex-direction: column;
    align-items: stretch;
  }

  .featured-work-row-image {
    width: 100%;
  }

  .featured-work-row-body {
    padding: var(--space-md);
    align-items: center;
    text-align: center;
  }

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