*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root,
[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0a0a0a;
  --text: #e8e8e8;
  --text-muted: #888;
  --text-dim: #555;
  --border: #1a1a1a;
  --border-strong: #2a2a2a;
  --border-hover: #252525;
  --accent: #fff;
  --glow: rgba(255, 255, 255, 0.15);
  --surface: rgba(255, 255, 255, 0.015);
  --surface-2: rgba(255, 255, 255, 0.025);
  --surface-3: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.02);
  --surface-active: rgba(255, 255, 255, 0.1);
  --shadow: rgba(0, 0, 0, 0.35);
  --avatar-fallback-bg: #111;
  --overlay: rgba(0, 0, 0, 0.92);
  --caption-overlay: rgba(0, 0, 0, 0.85);
  --thumb-bg: #0d0d0d;
  --icon: #666;
  --chip-text: #999;
  --chip-border: #1e1e1e;
  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
  color-scheme: light;
  --bg: #f7f7f7;
  --text: #141414;
  --text-muted: #5a5a5a;
  --text-dim: #888;
  --border: #ddd;
  --border-strong: #ccc;
  --border-hover: #bbb;
  --accent: #0a0a0a;
  --glow: rgba(0, 0, 0, 0.1);
  --surface: #fff;
  --surface-2: #f0f0f0;
  --surface-3: #e8e8e8;
  --surface-hover: rgba(0, 0, 0, 0.03);
  --surface-active: #fff;
  --shadow: rgba(0, 0, 0, 0.1);
  --avatar-fallback-bg: #ececec;
  --overlay: rgba(247, 247, 247, 0.96);
  --caption-overlay: rgba(255, 255, 255, 0.92);
  --thumb-bg: #ececec;
  --icon: #777;
  --chip-text: #666;
  --chip-border: #ddd;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 15px;
  line-height: 1.7;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 520px;
  margin: 0 auto;
  padding: 4rem 1.5rem 6rem;
  text-align: center;
}

/* ── Hero controls ── */

.hero-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem 1.25rem;
  margin-top: 1.25rem;
}

.control-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
}

.control-label {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

.segmented-control {
  display: inline-flex;
  padding: 3px;
  gap: 3px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 1px 2px var(--shadow);
}

.segmented-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-width: 52px;
  padding: 0.42rem 0.7rem;
  border: 1px solid transparent;
  border-radius: 5px;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition:
    color 0.25s var(--ease),
    background 0.25s var(--ease),
    border-color 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}

.segmented-btn:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.segmented-btn.is-active {
  color: var(--accent);
  background: var(--surface-active);
  border-color: var(--border);
  box-shadow: 0 1px 4px var(--shadow);
}

.segmented-btn svg {
  flex-shrink: 0;
}

/* ── Avatar ── */

.avatar-wrapper {
  position: relative;
  width: 152px;
  height: 152px;
  margin: 0 auto 1.65rem;
  overflow: visible;
}

.avatar-stack {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  overflow: hidden;
}

.avatar,
.avatar-fallback {
  display: block;
  width: 152px;
  height: 152px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  transition: opacity 0.35s var(--ease), box-shadow 0.4s var(--ease);
}

.avatar-hover {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 3;
  width: 118%;
  height: 118%;
  margin: 0;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -50%);
  transition: opacity 0.35s var(--ease), box-shadow 0.4s var(--ease);
}

.avatar-wrapper:hover .avatar-hover {
  opacity: 1;
}

.avatar-stack.no-photo .avatar-static {
  display: none;
}

.avatar-stack.no-photo .avatar-hover {
  display: none;
}

.avatar-stack.no-photo .avatar-fallback {
  display: flex;
}

.avatar-wrapper:hover .avatar-static,
.avatar-wrapper:hover .avatar-fallback {
  box-shadow: 0 0 20px var(--glow), 0 0 40px var(--shadow);
}

.avatar-wrapper:hover .avatar-hover {
  box-shadow: 0 0 20px var(--glow), 0 0 40px var(--shadow);
}

.avatar-fallback {
  display: none;
  align-items: center;
  justify-content: center;
  background: var(--avatar-fallback-bg);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 500;
  color: var(--text-muted);
}

.avatar-wrapper::after {
  content: '';
  position: absolute;
  inset: -3px;
  z-index: 2;
  border-radius: 50%;
  border: 1px solid transparent;
  transition: border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
  pointer-events: none;
}

.avatar-wrapper:hover::after {
  border-color: var(--border-strong);
  box-shadow: 0 0 24px var(--glow), 0 0 48px var(--shadow);
}

/* ── Hero ── */

.username {
  font-family: var(--font-mono);
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.title {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.01em;
}

/* ── Bio ── */

.bio {
  margin-top: 2.5rem;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
}

.bio-blocks {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.bio-block {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.45rem 0.55rem;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
}

.bio-block--langs {
  gap: 0.4rem 0.5rem;
  padding: 0.65rem 0.85rem;
}

.bio-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  font-size: 0.76rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.bio-lang {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--chip-text);
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--chip-border);
  border-radius: 5px;
  background: var(--surface-2);
  letter-spacing: 0.01em;
}

.bio-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--icon);
}

.bio-note {
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.bio-disclaimer {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-style: italic;
}

.bio-privacy {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-top: 0.25rem;
}

/* ── Projects ── */

.projects {
  margin-top: 3.5rem;
  text-align: left;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  text-align: center;
  margin-bottom: 1.25rem;
}

.project {
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  padding: 0.15rem;
  transition: border-color 0.3s var(--ease);
}

.project + .project {
  margin-top: 0.75rem;
}

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

.project-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.9rem 1.1rem;
  border: none;
  background: transparent;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  user-select: none;
  transition: background 0.3s var(--ease);
}

.project-header:hover {
  background: var(--surface-hover);
}

.project-name {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  flex: 1;
}

.status {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}

.status-released {
  color: #7ec699;
  background: rgba(126, 198, 153, 0.1);
  border: 1px solid rgba(126, 198, 153, 0.25);
}

.status-dev {
  color: #d4a853;
  background: rgba(212, 168, 83, 0.1);
  border: 1px solid rgba(212, 168, 83, 0.25);
}

.chevron {
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--text-dim);
  border-bottom: 1.5px solid var(--text-dim);
  transform: rotate(45deg);
  transition: transform 0.35s var(--ease);
  flex-shrink: 0;
  margin-left: 0.25rem;
}

.project.is-open .chevron {
  transform: rotate(-135deg);
}

.project-body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.5s var(--ease);
}

.project.is-open .project-body {
  grid-template-rows: 1fr;
}

.project-body-inner {
  overflow: hidden;
  min-height: 0;
  padding: 0 1.1rem;
  opacity: 0;
  transform: translateY(-6px);
  transition:
    opacity 0.4s var(--ease),
    transform 0.5s var(--ease),
    padding 0.5s var(--ease);
}

.project.is-open .project-body-inner {
  padding-bottom: 1.1rem;
  opacity: 1;
  transform: translateY(0);
}

.project-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.55;
  padding-top: 0.15rem;
  margin-bottom: 0.85rem;
}

/* ── Tech tags ── */

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface-3);
  border: 1px solid var(--border);
  padding: 0.25rem 0.55rem;
  border-radius: 4px;
  letter-spacing: 0.02em;
}

/* ── Stack diagram ── */

.stack-diagram {
  margin-bottom: 1rem;
}

/* ── Screenshots ── */

.project-screenshots {
  margin-bottom: 1rem;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.5rem;
}

.screenshot-thumb {
  position: relative;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--thumb-bg);
  cursor: pointer;
  overflow: hidden;
  transition:
    border-color 0.3s var(--ease),
    transform 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.screenshot-thumb:hover {
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--shadow);
}

.screenshot-thumb img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: top;
  opacity: 0.92;
  transition: opacity 0.3s var(--ease);
}

.screenshot-thumb:hover img {
  opacity: 1;
}

.screenshot-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 0.35rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text);
  background: linear-gradient(transparent, var(--caption-overlay));
  text-align: left;
}

/* ── Lightbox ── */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 3.5rem;
  background: var(--overlay);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s var(--ease), visibility 0.35s var(--ease);
}

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

.lightbox[hidden] {
  display: flex;
}

.lightbox-content {
  max-width: min(920px, 100%);
  margin: 0;
  transform: scale(0.96);
  transition: transform 0.35s var(--ease);
}

.lightbox.is-open .lightbox-content {
  transform: scale(1);
}

.lightbox-img {
  display: block;
  width: 100%;
  height: auto;
  max-height: calc(100dvh - 8rem);
  object-fit: contain;
  border-radius: 8px;
  border: 1px solid var(--border);
  box-shadow: 0 24px 64px var(--shadow);
}

.lightbox-caption {
  margin-top: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: center;
  letter-spacing: 0.04em;
}

.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-muted);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

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

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text-muted);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

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

.lightbox-prev { left: 1rem; }
.lightbox-next { right: 1rem; }

.stack-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

.stack-bar {
  display: flex;
  height: 8px;
  border-radius: 4px;
  overflow: hidden;
  gap: 1px;
}

.stack-segment {
  flex: var(--flex);
  background: var(--color);
  font-size: 0;
}

.stack-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1rem;
  margin-top: 0.6rem;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}

.legend-item i {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  font-style: normal;
}

/* ── Links ── */

.project-links {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  color: var(--text-muted);
  background: var(--surface-3);
  border: 1px solid var(--border);
  text-decoration: none;
  transition:
    color 0.25s var(--ease),
    background 0.25s var(--ease),
    border-color 0.25s var(--ease),
    box-shadow 0.25s var(--ease);
}

.link-btn:hover {
  color: var(--accent);
  background: var(--surface-hover);
  border-color: var(--border-strong);
  box-shadow: 0 0 12px var(--shadow);
}

/* ── Scroll fade-in ── */

.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }

/* ── Responsive ── */

@media (max-width: 480px) {
  .container {
    padding: 3rem 1.25rem 4rem;
  }

  .username {
    font-size: 1.85rem;
  }

  .avatar-wrapper,
  .avatar-stack,
  .avatar,
  .avatar-fallback {
    width: 128px;
    height: 128px;
  }

  .avatar-fallback {
    font-size: 2.5rem;
  }

  .bio-block {
    padding: 0.6rem 0.7rem;
    gap: 0.4rem;
  }

  .bio-chip {
    font-size: 0.72rem;
  }

  .hero-controls {
    gap: 0.65rem;
  }

  .segmented-btn {
    min-width: 46px;
    padding: 0.38rem 0.55rem;
    font-size: 0.64rem;
  }

  .project-header {
    padding: 0.8rem 0.9rem;
    gap: 0.5rem;
  }

  .project-name {
    font-size: 0.8rem;
  }

  .stack-legend {
    gap: 0.4rem 0.75rem;
  }

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

  .lightbox {
    padding: 1.5rem 1rem;
  }

  .lightbox-nav {
    display: none;
  }
}