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

:root {
  --sidebar-width: clamp(260px, 22vw, 340px);
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #7a9175;
  --light: #e8e8e8;
  --placeholder-bg: #f2f2f2;
  --accent: #E8157A;
  --teal: #2DB5A5;
  --font: 'Space Mono', 'Courier New', Courier, monospace;
}

html { font-size: 14px; scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  display: flex;
  min-height: 100vh;
}

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

/* ══════════════════════════════
   SIDEBAR
══════════════════════════════ */
.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  position: sticky;
  top: 0;
  align-self: flex-start;
  min-height: 100vh;
  padding: 64px 32px 44px 40px;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-right: 1px solid var(--light);
}

.sidebar-name {
  font-family: var(--font);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 56px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.sidebar-name .zh {
  display: block;
  font-weight: 400;
  color: var(--muted);
  font-size: 12px;
  margin-top: 4px;
  letter-spacing: 0.06em;
  text-transform: none;
}

.sb-group { margin-bottom: 36px; }
.sb-group-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--teal);
  margin-bottom: 8px;
}
.sb-list { list-style: none; }
.sb-list li { margin-bottom: 7px; }
.sb-list a {
  font-size: 13px;
  line-height: 1.5;
  color: var(--fg);
  display: block;
}
.sb-list a:hover,
.sb-list a.active {
  color: var(--accent);
  text-decoration: none;
}

.sb-info {
  list-style: none;
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid var(--light);
}
.sb-info li { margin-bottom: 4px; }
.sb-info a { font-size: 13px; color: var(--fg); }
.sb-info a:hover { color: var(--accent); text-decoration: none; }

.sidebar-footer {
  margin-top: 20px;
  font-size: 11px;
  color: #bbb;
}

/* ══════════════════════════════
   MAIN CONTENT
══════════════════════════════ */
.main-area {
  flex: 1;
  display: flex;
  justify-content: center;
}
.content {
  width: 100%;
  max-width: clamp(680px, 82%, 1020px);
  padding: 64px 40px 120px 40px;
}

.entry {
  margin-bottom: 96px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--light);
}
.entry:last-child { border-bottom: none; }

.entry-header { margin-bottom: 24px; }

.entry-title {
  font-family: var(--font);
  font-size: 20px;
  font-weight: 700;
  font-style: italic;
  letter-spacing: 0.01em;
  line-height: 1.2;
  margin-bottom: 6px;
  color: var(--accent);
}
.entry-title .zh {
  font-style: normal;
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
}
.entry-meta {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
}

/* ── Image ── */
.img-wrap { width: 100%; margin-bottom: 8px; overflow: hidden; }
.img-wrap img { width: 100%; height: auto; display: block; }

.img-placeholder {
  width: 100%;
  background: var(--placeholder-bg);
  border: 1px dashed #d0d0d0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #bbb;
  font-size: 11px;
  font-family: "Courier New", monospace;
  letter-spacing: 0.04em;
}
.img-placeholder.r16x9 { aspect-ratio: 16 / 9; }
.img-placeholder.r4x3  { aspect-ratio: 4 / 3; }
.img-placeholder.r3x4  { aspect-ratio: 3 / 4; }
.img-placeholder.r1x1  { aspect-ratio: 1 / 1; }

.img-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 8px;
}

.img-caption {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 24px;
}

/* ── Body text ── */
.entry-body { max-width: 660px; }
.entry-body p {
  font-size: 13px;
  line-height: 1.9;
  color: var(--fg);
  margin-bottom: 14px;
}
.entry-body p:last-child { margin-bottom: 0; }
.entry-body a { color: var(--accent); text-decoration: underline; }

/* ── Section heading ── */
.section-heading {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--teal);
  margin-bottom: 48px;
  margin-top: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--light);
}

/* ── About ── */
.about-portrait { max-width: 380px; margin-bottom: 32px; }
.about-portrait img { width: 100%; height: auto; display: block; }
.about-body p {
  font-size: 13px;
  line-height: 1.9;
  color: var(--fg);
  margin-bottom: 14px;
  max-width: 640px;
}
.about-body a { color: var(--accent); text-decoration: underline; }

/* ── Contact ── */
.contact-email {
  font-size: 18px;
  letter-spacing: 0.02em;
  margin-bottom: 28px;
  font-weight: 700;
}
.contact-email a { color: inherit; text-decoration: underline; }
.contact-links { display: flex; flex-wrap: wrap; gap: 20px; }
.contact-links a { font-size: 13px; color: var(--muted); }
.contact-links a:hover { color: var(--fg); }

/* ══════════════════════════════
   ANIMATIONS
══════════════════════════════ */
.img-wrap img,
.img-grid-2 img,
.about-portrait img {
  transition: opacity 1s cubic-bezier(0.33, 0, 0.2, 1),
              transform 0.55s cubic-bezier(0.33, 0, 0.2, 1);
}
.img-wrap:hover img { transform: scale(1.025); }

/* ══════════════════════════════
   LANG TOGGLE
══════════════════════════════ */
.lang-toggle {
  position: fixed;
  top: 20px;
  right: 28px;
  z-index: 300;
  display: flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.06em;
  padding: 0;
}
.lang-toggle:hover { color: var(--fg); }

.toggle-track {
  width: 38px;
  height: 21px;
  background: var(--light);
  border-radius: 11px;
  position: relative;
  transition: background 0.25s;
  flex-shrink: 0;
}
.toggle-track.zh { background: var(--accent); }

.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 15px;
  height: 15px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.25s cubic-bezier(.4, 0, .2, 1);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.18);
}
.toggle-track.zh .toggle-thumb { transform: translateX(17px); }

.lang-label { user-select: none; }

.lang-toggle-inline {
  display: none;
  align-items: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  padding: 0;
}
.lang-toggle-inline .toggle-track { width: 32px; height: 18px; border-radius: 9px; }
.lang-toggle-inline .toggle-thumb { width: 12px; height: 12px; top: 3px; left: 3px; }
.lang-toggle-inline .toggle-track.zh .toggle-thumb { transform: translateX(14px); }

/* ══════════════════════════════
   MOBILE
══════════════════════════════ */
.mobile-header { display: none; }
.mobile-nav    { display: none; }

@media (max-width: 800px) {
  body { flex-direction: column; }
  .sidebar { display: none; }
  .main-area { display: block; }
  .lang-toggle { display: none !important; }
  .lang-toggle-inline { display: flex; }

  .mobile-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 20px;
    border-bottom: 1px solid var(--light);
    position: sticky;
    top: 0;
    background: var(--bg);
    z-index: 100;
  }
  .mobile-name { font-size: 12px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; }
  .mobile-header-actions { display: flex; align-items: center; gap: 14px; }
  .menu-btn {
    background: none;
    border: none;
    font-size: 13px;
    cursor: pointer;
    color: var(--fg);
    font-family: var(--font);
  }

  .mobile-nav {
    background: var(--bg);
    border-bottom: 1px solid var(--light);
    padding: 20px 20px 28px;
  }
  .mobile-nav.open { display: block; }
  .mobile-nav .sb-group { margin-bottom: 20px; }

  .content { padding: 32px 20px 80px; max-width: 100%; }
  .entry-title { font-size: 17px; }
  .img-grid-2 { grid-template-columns: 1fr; }
  .about-portrait { max-width: 200px; }
}

@media (max-width: 480px) {
  .content { padding: 24px 16px 60px; }
}