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

:root {
  --bg: #0d0d0f;
  --bg2: #111115;
  --surface: #1a1a22;
  --border: rgba(255,255,255,0.08);
  --accent: #7c6af7;
  --accent2: #3ecfcf;
  --text: #e8e8f0;
  --text-muted: #888896;
  --font-en: 'Space Grotesk', sans-serif;
  --font-jp: 'Noto Sans JP', sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-jp);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ===== Noise overlay ===== */
.noise {
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 128px 128px;
}

/* ===== Container ===== */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  height: 100dvh;
  min-height: 600px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: brightness(0.35) saturate(0.6);
  transform: scale(1.05);
  animation: slow-zoom 20s ease-in-out infinite alternate;
}

@keyframes slow-zoom {
  from { transform: scale(1.05); }
  to   { transform: scale(1.12); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(124,106,247,0.15) 0%,
    rgba(0,0,0,0.5) 60%,
    rgba(62,207,207,0.08) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 0 2.5rem;
  animation: fade-up 1s ease both;
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero-tag {
  font-family: var(--font-en);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: var(--accent2);
  margin-bottom: 0.5rem;
}

.hero-title {
  font-family: var(--font-en);
  font-size: clamp(3rem, 9vw, 7rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: #fff;
  text-shadow:
    0 0 80px rgba(124,106,247,0.4),
    0 0 200px rgba(124,106,247,0.15);
}

.hero-sub {
  margin-top: 1rem;
  font-size: 1.1rem;
  color: rgba(255,255,255,0.55);
  font-weight: 300;
  letter-spacing: 0.05em;
}

.scroll-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 3rem;
  font-family: var(--font-en);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  text-decoration: none;
  transition: color 0.3s;
  animation: fade-up 1s 0.4s ease both;
}

.scroll-btn:hover { color: var(--accent2); }

.scroll-btn svg {
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(5px); }
}

.hero-deco {
  position: absolute;
  right: -4%;
  bottom: 0;
  z-index: 1;
  width: min(480px, 50vw);
  pointer-events: none;
  animation: fade-up 1.2s 0.2s ease both;
}

.deco-sword {
  width: 100%;
  opacity: 0.18;
  filter: drop-shadow(0 0 40px rgba(124,106,247,0.3));
}

/* ===== Sections ===== */
.section {
  padding: 7rem 0;
}

.section--dark {
  background-color: var(--bg2);
}

.section-title {
  font-family: var(--font-en);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 3.5rem;
  display: flex;
  align-items: baseline;
  gap: 1rem;
}

.tag {
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.2em 0.5em;
  border-radius: 4px;
}

/* ===== About ===== */
.about-grid {
  max-width: 600px;
}

.about-text p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 1.2rem;
}

.about-text strong {
  color: var(--text);
  font-weight: 700;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2rem;
}

.chip {
  font-family: var(--font-en);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  padding: 0.3em 0.8em;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--surface);
  transition: border-color 0.3s, color 0.3s;
}

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

.about-visual {
  display: flex;
  justify-content: center;
}

.katana-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 300px;
  aspect-ratio: 1;
  box-shadow: 0 0 60px rgba(124,106,247,0.08);
  transition: box-shadow 0.4s, transform 0.4s;
}

.katana-card:hover {
  box-shadow: 0 0 80px rgba(124,106,247,0.2);
  transform: translateY(-4px);
}

.katana-card img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 4px 20px rgba(124,106,247,0.2));
}

.about-more {
  display: inline-flex;
  align-items: center;
  margin-top: 2rem;
  font-family: var(--font-en);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.5em 1.2em;
  border-radius: 100px;
  transition: background 0.3s, color 0.3s;
}

.about-more:hover {
  background: var(--accent);
  color: #fff;
}

/* ===== Links ===== */
.links-group {
  margin-bottom: 3rem;
}

.links-name {
  font-family: var(--font-en);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.link-card {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  text-decoration: none;
  color: var(--text-muted);
  font-family: var(--font-en);
  transition: border-color 0.25s, color 0.25s, transform 0.25s, box-shadow 0.25s, background 0.25s;
  min-width: 220px;
  position: relative;
  overflow: hidden;
}

.link-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  flex-shrink: 0;
  transition: background 0.25s;
}

.link-icon svg {
  width: 20px;
  height: 20px;
}

.link-info {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  flex: 1;
}

.link-platform {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  opacity: 0.6;
  transition: opacity 0.25s;
}

.link-handle {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.01em;
}

.link-arrow {
  font-size: 1rem;
  opacity: 0;
  transform: translate(-4px, 4px);
  transition: opacity 0.25s, transform 0.25s;
}

.link-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--link-color, #ffffff) 30%, transparent);
  box-shadow: 0 8px 32px color-mix(in srgb, var(--link-color, #000000) 10%, transparent);
}

.link-card:hover .link-arrow {
  opacity: 0.6;
  transform: translate(0, 0);
}

.link-card:hover .link-platform {
  opacity: 1;
}

.link-card:hover .link-icon {
  background: color-mix(in srgb, var(--link-color, #ffffff) 15%, transparent);
  color: var(--link-color, inherit);
}

/* ===== Works ===== */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1.2rem;
  margin-bottom: 3rem;
}

.work-card {
  display: block;
  padding: 2rem 1.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}

.work-card:hover {
  border-color: color-mix(in srgb, var(--work-color, var(--accent2)) 60%, transparent);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px color-mix(in srgb, var(--work-color, var(--accent2)) 12%, transparent);
}

.work-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  line-height: 1;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.work-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 8px;
}

.work-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.work-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.omake-section {
  border-top: 1px solid var(--border);
  padding-top: 2.5rem;
}

.omake-title {
  font-family: var(--font-en);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 1.2rem;
}

.omake-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.omake-link {
  display: inline-block;
  padding: 0.6em 1.2em;
  border: 1px solid var(--border);
  border-radius: 100px;
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: border-color 0.3s, color 0.3s;
}

.omake-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ===== Katana Gallery ===== */
.katana-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  justify-content: center;
}

.katana-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 1.5rem;
  width: 160px;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}

.katana-item:hover {
  border-color: var(--accent);
  transform: translateY(-6px) rotate(1deg);
  box-shadow: 0 12px 40px rgba(124,106,247,0.2);
}

.katana-item img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 2px 12px rgba(124,106,247,0.15));
}

/* ===== Terminal ===== */
.term-wrap {
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  font-size: 0.85rem;
  line-height: 1.7;
  max-width: 720px;
}

.term-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--term-bar, #1e1e28);
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border);
}

.term-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.term-dot.red    { background: var(--term-dot-red,    #ff5f57); }
.term-dot.yellow { background: var(--term-dot-yellow, #febc2e); }
.term-dot.green  { background: var(--term-dot-green,  #28c840); }

.term-title {
  margin-left: 0.4rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.term-body {
  background: var(--term-bg, #0d0d10);
  padding: 1.2rem 1.4rem;
  min-height: 160px;
  max-height: 380px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.term-line {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  white-space: pre-wrap;
  word-break: break-all;
  animation: term-line-in 0.18s ease both;
}

@keyframes term-line-in {
  from { opacity: 0; transform: translateY(5px); }
  to   { opacity: 1; transform: translateY(0); }
}

.term-prompt-echo {
  color: var(--accent2);
  flex-shrink: 0;
  user-select: none;
}

.term-typed { color: var(--term-typed, #e8e8f0); }

.term-out { color: var(--term-text, #aaaabc); }
.term-out .term-cmd { color: var(--accent); cursor: pointer; }
.term-out .term-cmd:hover { text-decoration: underline; }
.term-out a { color: var(--term-link, var(--accent)); text-decoration: none; }
.term-out a:hover { text-decoration: underline; }
.term-out.success { color: var(--term-success, var(--accent2)); }
.term-out.error   { color: var(--term-error, #f87171); }

.readme-img {
  max-width: 100%;
  max-height: 200px;
  border-radius: 6px;
  margin: 0.3rem 0;
  display: block;
  object-fit: contain;
  opacity: 0.9;
}

/* README Viewer (app-like overlay) */
.readme-viewer {
  display: flex;
  flex-direction: column;
  background: var(--term-bg, #0d0d10);
  animation: readme-open 0.35s cubic-bezier(0.16, 1, 0.3, 1) both;
}

.readme-viewer--closing {
  animation: readme-close 0.25s ease both;
}

.readme-viewer-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.55rem 1.2rem;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border);
}

.readme-viewer-title {
  font-size: 0.8rem;
  font-weight: 600;
  opacity: 0.9;
}

.readme-viewer-close {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.7rem;
  padding: 0.25rem 0.7rem;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.readme-viewer-close:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text);
}

.readme-viewer-content {
  flex: 1;
  overflow-y: auto;
  padding: 1.2rem 1.4rem;
  max-height: 380px;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

@keyframes readme-open {
  from { opacity: 0; transform: translateY(16px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes readme-close {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to   { opacity: 0; transform: translateY(16px) scale(0.97); }
}

.term-input-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--term-bg, #0d0d10);
  padding: 0.7rem 1.4rem;
  border-top: 1px solid var(--border);
}

.term-prompt {
  color: var(--accent2);
  flex-shrink: 0;
  user-select: none;
}

.term-input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-family: inherit;
  font-size: inherit;
  flex: 1;
  caret-color: var(--accent2);
}

/* ===== Footer ===== */
.footer {
  padding: 3rem 0;
  background-color: #0a0a0c;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-logo {
  font-family: var(--font-en);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.footer-copy {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== Scroll animation ===== */
.section-title,
.about-grid,
.links-group,
.works-grid,
.omake-section,
.katana-grid {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.in-view {
  opacity: 1 !important;
  transform: translateY(0) !important;
}

/* ===== Responsive ===== */
@media (max-width: 700px) {
  .container {
    padding: 0 1.2rem;
  }

  .section {
    padding: 4rem 0;
  }

  .section-title {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    gap: 0.6rem;
  }

  .tag {
    font-size: 0.65rem;
    padding: 0.15em 0.4em;
  }

  /* Hero */
  .hero {
    min-height: 500px;
  }

  .hero-content {
    padding: 0 1.2rem;
  }

  .hero-title {
    font-size: clamp(2.2rem, 12vw, 3.5rem);
  }

  .hero-sub {
    font-size: 0.9rem;
  }

  .scroll-btn {
    margin-top: 2rem;
  }

  .hero-deco {
    display: none;
  }

  /* About */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-visual {
    order: -1;
  }

  .katana-card {
    max-width: 220px;
    aspect-ratio: 1;
  }

  .about-text p {
    font-size: 0.95rem;
  }

  /* Links */
  .links-row {
    flex-direction: column;
    gap: 0.75rem;
  }

  .link-card {
    min-width: 0;
    width: 100%;
    padding: 0.85rem 1rem;
    gap: 0.8rem;
  }

  .link-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
  }

  .link-icon svg {
    width: 18px;
    height: 18px;
  }

  .link-handle {
    font-size: 0.82rem;
  }

  .link-platform {
    font-size: 0.62rem;
  }

  .link-arrow {
    opacity: 0.4;
    transform: none;
  }

  /* Works */
  .works-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
  }

  .work-card {
    padding: 1.2rem 1rem;
  }

  .work-card h3 {
    font-size: 0.85rem;
    word-break: break-all;
  }

  .work-card p {
    font-size: 0.72rem;
  }

  .work-icon {
    width: 40px;
    height: 40px;
    font-size: 1.6rem;
    margin-bottom: 0.7rem;
  }

  /* Terminal */
  .term-wrap {
    font-size: 0.72rem;
    line-height: 1.6;
    border-radius: 10px;
  }

  .term-bar {
    padding: 0.5rem 0.8rem;
    gap: 0.4rem;
  }

  .term-dot {
    width: 9px;
    height: 9px;
  }

  .term-body {
    padding: 0.8rem 0.9rem;
    max-height: 320px;
  }

  .term-line {
    gap: 0.4rem;
    word-break: break-all;
  }

  .term-input-row {
    padding: 0.5rem 0.9rem;
    gap: 0.4rem;
  }

  .readme-viewer-bar {
    padding: 0.45rem 0.9rem;
  }

  .readme-viewer-title {
    font-size: 0.7rem;
  }

  .readme-viewer-content {
    padding: 0.8rem 0.9rem;
    max-height: 320px;
  }

  /* Footer */
  .footer {
    padding: 2rem 0;
  }

  .footer-logo {
    font-size: 0.95rem;
  }

  .footer-copy {
    font-size: 0.72rem;
  }
}