/* Portfolio — GitHub Pages */

:root {
  --color-bg: #f6f4f0;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #5c5c5c;
  --color-border: #e2ddd4;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --font-sans: "Noto Sans JP", system-ui, sans-serif;
  --font-display: "Outfit", var(--font-sans);
  --radius: 12px;
  --shadow: 0 1px 2px rgba(26, 26, 26, 0.06), 0 8px 24px rgba(26, 26, 26, 0.06);
  --max-width: 720px;
  --max-width-wide: 960px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
  background-image: radial-gradient(
    ellipse 120% 80% at 50% -20%,
    rgba(37, 99, 235, 0.08),
    transparent 55%
  );
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.5rem 1rem;
  background: var(--color-accent);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 var(--radius) var(--radius);
  z-index: 100;
}

.skip-link:focus {
  top: 0;
}

.site-header {
  padding: clamp(2.5rem, 6vw, 4rem) 1.5rem 2rem;
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(180deg, var(--color-surface) 0%, transparent 100%);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-header__label {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.site-header__title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.site-header__lead {
  margin: 0;
  max-width: 42em;
  color: var(--color-text-muted);
  font-size: 1.0625rem;
}

.site-header__contact-link {
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
}

.site-header__contact-link:hover {
  text-decoration: underline;
}

.site-header__contact-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.site-main {
  flex: 1;
  padding: 2.5rem 1.5rem 3rem;
}

.section {
  max-width: var(--max-width-wide);
  margin: 0 auto;
}

.section__head {
  margin-bottom: 1.75rem;
  max-width: var(--max-width);
}

.section__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 700;
}

.section__subtitle {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.genre {
  margin: 0;
}

.genre + .genre {
  margin-top: 2.75rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--color-border);
}

.genre__head {
  margin-bottom: 1.25rem;
  max-width: var(--max-width);
}

.genre__head--wide {
  max-width: var(--max-width-wide);
}

.genre__title {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.genre__lead {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.genre__outro-title {
  margin-top: 2.25rem;
}

.genre__outro {
  margin: 0;
  max-width: var(--max-width);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--color-text-muted);
}

.genre__outro--after-grid {
  margin-top: 2.75rem;
}

.genre__outro-link {
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
}

.genre__outro-link:hover {
  text-decoration: underline;
}

.genre__outro-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.genre__placeholder {
  margin: 0;
  max-width: var(--max-width);
  padding: 1rem 1.15rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  background: rgba(255, 255, 255, 0.6);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
}

.card--no-actions .card__tags {
  margin-bottom: 0;
}

.card-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

@media (min-width: 900px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 1.35rem 1.35rem 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  border-color: rgba(37, 99, 235, 0.25);
  box-shadow: 0 2px 4px rgba(26, 26, 26, 0.04), 0 12px 32px rgba(37, 99, 235, 0.08);
}

.card__title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.35;
}

.card__desc {
  margin: 0 0 1rem;
  flex: 1;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

.card__code {
  padding: 0.1em 0.35em;
  font-family: ui-monospace, "Cascadia Code", "Consolas", monospace;
  font-size: 0.88em;
  color: var(--color-text);
  background: var(--color-bg);
  border-radius: 4px;
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0 0 1.1rem;
  padding: 0;
  list-style: none;
}

.card__tags li {
  padding: 0.2rem 0.55rem;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-bg);
  border-radius: 6px;
}

.card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin-top: auto;
  padding-top: 0.25rem;
}

.card__actions .card__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.25;
  text-decoration: none;
  border-style: solid;
  border-width: 1px;
  transition:
    color 0.15s ease,
    background-color 0.15s ease,
    border-color 0.15s ease;
}

.card__link--youtube {
  color: #fff;
  background: #c40f0f;
  border-color: #9f0c0c;
}

.card__link--youtube:hover {
  color: #fff;
  background: #a30d0d;
  border-color: #7a0a0a;
}

.card__link--youtube:focus-visible {
  outline: 2px solid #c40f0f;
  outline-offset: 2px;
}

.card__link--github {
  color: var(--color-accent);
  background: #fff;
  border-color: var(--color-accent);
}

.card__link--github:hover {
  color: var(--color-accent-hover);
  background: rgba(37, 99, 235, 0.07);
  border-color: var(--color-accent-hover);
}

.card__link--github:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.card__private-badge {
  display: inline-flex;
  align-items: center;
  box-sizing: border-box;
  padding: 0.45rem 0.85rem;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
}

.site-footer {
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
  background: var(--color-surface);
}

.site-footer__inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
}

.site-footer__support {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
}

.site-footer__support-link {
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
}

.site-footer__support-link:hover {
  text-decoration: underline;
}

.site-footer__support-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

.social__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.65rem 1.35rem;
}

.social__link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  border-radius: 8px;
  padding: 0.35rem 0.5rem;
  margin: -0.35rem -0.5rem;
  transition: color 0.15s ease, background-color 0.15s ease;
}

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

.social__link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.social__icon {
  width: 1.25rem;
  height: 1.25rem;
  flex-shrink: 0;
}

.social__handle {
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.site-footer__text {
  margin: 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.site-footer__text a {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: none;
}

.site-footer__text a:hover {
  text-decoration: underline;
}

.site-footer__sep {
  margin: 0 0.35rem;
  opacity: 0.5;
}

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

  .card {
    transition: none;
  }

  .card__actions .card__link {
    transition: none;
  }
}