/* ============================================================
   ANGELA GUO — Shared Stylesheet v6
   All pages import this file.
   Edit here to change colors, fonts, or layout globally.
============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;1,400&display=swap');

:root {
  --ink:          #18120e;
  --ink-muted:    #6b6057;
  --ink-faint:    #b0a89f;
  --paper:        #faf8f5;
  --paper-warm:   #f0ece5;
  --paper-card:   #ffffff;
  --accent:       #b85c2a;
  --accent-light: #f7ede5;
  --border:       rgba(24,18,14,0.09);
  --border-mid:   rgba(24,18,14,0.16);
  --font:         'Plus Jakarta Sans', system-ui, sans-serif;
  --max:          640px;
  --nav-w:        196px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

/* ── LAYOUT ──────────────────────────────────────────────── */
.site {
  display: grid;
  grid-template-columns: var(--nav-w) 1fr;
  min-height: 100vh;
}

/* ── SIDEBAR NAV ─────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 44px 0 44px 32px;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border);
  overflow-y: auto;
}
.nav-brand { margin-bottom: 36px; }
.nav-brand-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  display: block;
  margin-bottom: 5px;
  letter-spacing: -0.01em;
}
.nav-brand-roles {
  font-size: 9px;
  font-weight: 400;
  color: var(--ink-faint);
  letter-spacing: 0.02em;
  line-height: 1.7;
}
.nav-links { list-style: none; display: flex; flex-direction: column; gap: 1px; flex: 1; }
.nav-links a {
  display: block;
  font-size: 12px;
  font-weight: 400;
  color: var(--ink-muted);
  padding: 5px 0;
  transition: color 0.15s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--ink); text-decoration: none; font-weight: 500; }
.nav-footer {
  font-size: 10px;
  color: var(--ink-faint);
  line-height: 1.65;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  margin-right: 20px;
}

/* ── MAIN ────────────────────────────────────────────────── */
.main { max-width: calc(var(--max) + 80px); padding: 0 44px 120px 52px; }

/* ── SECTION ─────────────────────────────────────────────── */
.section { padding: 60px 0; border-bottom: 1px solid var(--border); }
.section:last-of-type { border-bottom: none; }
.section-eyebrow {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 22px;
}

/* ── HERO ─────────────────────────────────────────────────── */
#hero { padding-top: 68px; padding-bottom: 52px; border-bottom: 1px solid var(--border); }

.hero-photo-row {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 18px;
}
.hero-photo {
  width: 60px; height: 60px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid var(--paper-warm);
}
.hero-photo-placeholder {
  width: 60px; height: 60px;
  border-radius: 50%;
  background: var(--accent-light);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 600; color: var(--accent);
  flex-shrink: 0;
  border: 2px solid var(--paper-warm);
  letter-spacing: -0.02em;
}
.hero-name {
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin-bottom: 7px;
}
.hero-roles {
  font-size: 11px;
  font-weight: 400;
  color: var(--ink-faint);
  letter-spacing: 0.04em;
  margin-bottom: 16px;
  line-height: 1.6;
}
.hero-roles span { margin: 0 6px; }
.hero-sub {
  font-size: 14px;
  font-weight: 400;
  color: var(--ink-muted);
  max-width: 420px;
  line-height: 1.65;
}

/* ── STORY ───────────────────────────────────────────────── */
.story-body {
  font-size: 15px;
  font-weight: 400;
  line-height: 1.85;
  color: var(--ink);
  max-width: var(--max);
}
.story-body p { margin-bottom: 1.3em; }
.story-body p:last-child { margin-bottom: 0; }

.story-timeline { margin-top: 36px; display: flex; flex-direction: column; }
.timeline-row {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 0 20px;
  padding: 13px 0;
  border-top: 1px solid var(--border);
  align-items: baseline;
}
.tl-years { font-size: 10px; color: var(--ink-faint); padding-top: 2px; }
.tl-co { font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 2px; }
.tl-role { font-size: 11px; color: var(--ink-muted); line-height: 1.5; }
.tl-badge {
  display: inline-block;
  font-size: 8px;
  padding: 2px 5px;
  border-radius: 3px;
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-left: 5px;
  vertical-align: middle;
}

/* ── PHILOSOPHY ──────────────────────────────────────────── */
.philosophy-list { list-style: none; display: flex; flex-direction: column; max-width: var(--max); }
.philosophy-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 0 16px;
  align-items: baseline;
}
.philosophy-item:last-child { border-bottom: none; }
.phi-num { font-size: 9px; color: var(--ink-faint); padding-top: 3px; font-weight: 500; }
.phi-text { font-size: 14px; font-weight: 400; line-height: 1.75; color: var(--ink); }

/* ── PORTFOLIO ───────────────────────────────────────────── */
.portfolio-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.portfolio-card {
  background: var(--paper-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color 0.2s, transform 0.18s;
}
.portfolio-card:hover { border-color: var(--border-mid); transform: translateY(-2px); }
.portfolio-card-media {
  height: 140px;
  background: var(--paper-warm);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.portfolio-card-media img { width: 100%; height: 100%; object-fit: cover; }
.portfolio-card-media-placeholder { font-size: 11px; color: var(--ink-faint); text-align: center; padding: 16px; line-height: 1.6; }
.portfolio-card-body { padding: 14px 15px 15px; }
.portfolio-card-co { font-size: 9px; text-transform: uppercase; letter-spacing: 0.09em; color: var(--ink-faint); margin-bottom: 3px; font-weight: 600; }
.portfolio-card-title { font-size: 13px; font-weight: 600; color: var(--ink); margin-bottom: 5px; line-height: 1.3; }
.portfolio-card-impact { font-size: 11px; color: var(--accent); font-weight: 600; margin-bottom: 7px; }
.portfolio-card-desc { font-size: 11px; color: var(--ink-muted); line-height: 1.6; }
.portfolio-tags { display: flex; gap: 4px; flex-wrap: wrap; margin-top: 10px; }
.ptag { font-size: 9px; padding: 2px 6px; border-radius: 3px; border: 1px solid var(--border); color: var(--ink-muted); font-weight: 500; }
.portfolio-card.featured { grid-column: 1 / -1; display: grid; grid-template-columns: 240px 1fr; }
.portfolio-card.featured .portfolio-card-media { height: 100%; min-height: 140px; }

/* ── BLOG LIST ───────────────────────────────────────────── */
.blog-filters { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 24px; }
.filter-btn {
  font-size: 11px; font-weight: 500;
  padding: 4px 12px; border-radius: 20px;
  border: 1px solid var(--border); background: transparent;
  color: var(--ink-muted); cursor: pointer;
  transition: all 0.15s; font-family: var(--font);
}
.filter-btn:hover { border-color: var(--border-mid); color: var(--ink); }
.filter-btn.active { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.blog-list { display: flex; flex-direction: column; }
.blog-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: baseline;
  cursor: pointer;
}
.blog-item:last-child { border-bottom: none; }
.blog-item:hover .bi-title { color: var(--accent); }
.bi-tag { font-size: 9px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.07em; color: var(--ink-faint); margin-bottom: 3px; }
.bi-title { font-size: 14px; font-weight: 400; color: var(--ink); line-height: 1.4; transition: color 0.15s; }
.bi-excerpt { font-size: 11px; color: var(--ink-muted); margin-top: 3px; line-height: 1.5; }
.bi-date { font-size: 10px; color: var(--ink-faint); white-space: nowrap; }

/* ── NOTES (field notes) ─────────────────────────────────── */
.notes-list { display: flex; flex-direction: column; max-width: var(--max); }
.note-item {
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: baseline;
}
.note-item:last-child { border-bottom: none; }
.note-prefix { font-size: 10px; font-weight: 600; color: var(--accent); font-family: monospace; margin-bottom: 3px; }
.note-text { font-size: 13px; font-weight: 400; color: var(--ink); line-height: 1.65; }
.note-date { font-size: 10px; color: var(--ink-faint); white-space: nowrap; }

/* ── VIEW ALL LINK ───────────────────────────────────────── */
.view-all-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 18px;
  font-size: 11px;
  font-weight: 500;
  color: var(--ink-muted);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 13px;
  transition: all 0.15s;
}
.view-all-link:hover { border-color: var(--border-mid); color: var(--ink); text-decoration: none; }
.view-all-link::after { content: '→'; font-size: 10px; }

/* ── CTA ─────────────────────────────────────────────────── */
.cta-section { padding: 68px 0 48px; }
.cta-label { font-size: 9px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-faint); margin-bottom: 12px; }
.cta-headline {
  font-size: clamp(20px, 2.8vw, 26px);
  font-weight: 600;
  color: var(--ink);
  line-height: 1.25;
  margin-bottom: 20px;
  max-width: 360px;
  letter-spacing: -0.02em;
}
.cta-btn {
  display: inline-block;
  padding: 10px 24px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font);
  font-size: 12px;
  font-weight: 500;
  border-radius: 6px;
  letter-spacing: 0.01em;
  transition: background 0.15s, transform 0.15s;
  border: none;
  cursor: pointer;
}
.cta-btn:hover { background: var(--accent); text-decoration: none; color: white; transform: translateY(-1px); }
.cta-links { margin-top: 12px; font-size: 11px; color: var(--ink-faint); }
.cta-links a { color: var(--ink-muted); }

/* ── PAGE HEADER (sub-pages) ─────────────────────────────── */
.page-header { padding: 52px 0 36px; border-bottom: 1px solid var(--border); margin-bottom: 44px; }
.page-header h1 { font-size: 26px; font-weight: 600; color: var(--ink); letter-spacing: -0.02em; margin-bottom: 6px; }
.page-header p { font-size: 13px; color: var(--ink-muted); }
.back-link { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: var(--ink-muted); margin-bottom: 28px; font-weight: 500; padding-top: 40px; display: block; }
.back-link::before { content: '←'; font-size: 11px; }
.back-link:hover { color: var(--accent); text-decoration: none; }

/* ── CHATBOT ─────────────────────────────────────────────── */
#chat-toggle {
  position: fixed; bottom: 24px; right: 24px;
  width: 44px; height: 44px;
  background: var(--ink); color: var(--paper);
  border: none; border-radius: 50%; cursor: pointer;
  font-size: 17px; display: flex; align-items: center; justify-content: center;
  z-index: 1000; transition: background 0.2s, transform 0.2s;
  box-shadow: 0 2px 16px rgba(0,0,0,0.14);
}
#chat-toggle:hover { background: var(--accent); transform: scale(1.05); }
#chat-panel {
  position: fixed; bottom: 78px; right: 24px;
  width: 320px; max-height: 460px;
  background: var(--paper-card);
  border: 1px solid var(--border-mid);
  border-radius: 14px; display: none; flex-direction: column;
  z-index: 999; overflow: hidden;
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}
#chat-panel.open { display: flex; }
.chat-header { padding: 12px 14px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 10px; }
.chat-avatar { width: 28px; height: 28px; border-radius: 50%; background: var(--accent-light); display: flex; align-items: center; justify-content: center; font-size: 10px; font-weight: 700; color: var(--accent); flex-shrink: 0; }
.chat-header-name { font-size: 12px; font-weight: 600; color: var(--ink); }
.chat-header-sub { font-size: 9px; color: var(--ink-faint); }
.chat-close { background: none; border: none; font-size: 14px; color: var(--ink-faint); cursor: pointer; padding: 4px; margin-left: auto; line-height: 1; }
.chat-close:hover { color: var(--ink); }
.chat-messages { flex: 1; overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 10px; }
.chat-msg { max-width: 86%; font-size: 12px; line-height: 1.55; padding: 8px 11px; border-radius: 10px; }
.chat-msg.bot { background: var(--paper-warm); color: var(--ink); align-self: flex-start; border-radius: 2px 10px 10px 10px; }
.chat-msg.user { background: var(--ink); color: var(--paper); align-self: flex-end; border-radius: 10px 10px 2px 10px; }
.chat-msg.thinking { background: var(--paper-warm); color: var(--ink-faint); align-self: flex-start; font-style: italic; font-size: 11px; }
.chat-suggestions { padding: 0 12px 10px; display: flex; flex-wrap: wrap; gap: 5px; }
.suggestion-btn { font-size: 10px; padding: 4px 9px; border: 1px solid var(--border); border-radius: 12px; background: transparent; color: var(--ink-muted); cursor: pointer; font-family: var(--font); transition: all 0.15s; }
.suggestion-btn:hover { border-color: var(--accent); color: var(--accent); }
.rate-notice { font-size: 9px; color: var(--ink-faint); text-align: center; padding: 2px 12px 7px; }
.chat-input-row { padding: 10px 12px; border-top: 1px solid var(--border); display: flex; gap: 7px; align-items: center; }
#chat-input { flex: 1; border: 1px solid var(--border); border-radius: 18px; padding: 7px 12px; font-size: 12px; font-family: var(--font); color: var(--ink); background: var(--paper); outline: none; transition: border-color 0.15s; }
#chat-input:focus { border-color: var(--border-mid); }
#chat-send { width: 28px; height: 28px; background: var(--ink); color: white; border: none; border-radius: 50%; cursor: pointer; font-size: 12px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: background 0.15s; }
#chat-send:hover { background: var(--accent); }

/* ── MOBILE RESPONSIVE ───────────────────────────────────── */
@media (max-width: 640px) {
  body { background: var(--paper); }

  .site {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr;
    min-height: 100vh;
  }

  /* Sidebar becomes a sticky top bar */
  .nav {
    position: sticky;
    top: 0;
    height: auto;
    padding: 14px 16px 0;
    border-right: none;
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    z-index: 100;
    background: var(--paper);
  }
  .nav-brand { margin-bottom: 12px; }
  .nav-brand-name { font-size: 14px; }
  .nav-brand-roles { display: none; }
  .nav-footer { display: none; }

  /* Nav links become horizontal scrollable tabs */
  .nav-links {
    flex-direction: row;
    flex: none;
    gap: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 0;
  }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-links li { flex-shrink: 0; }
  .nav-links a {
    padding: 8px 12px 12px;
    font-size: 12px;
    border-bottom: 2px solid transparent;
    white-space: nowrap;
    color: var(--ink-muted);
  }
  .nav-links a.active {
    color: var(--ink);
    font-weight: 600;
    border-bottom-color: var(--accent);
  }

  /* Main content */
  .main {
    padding: 0 18px 80px;
    max-width: 100%;
  }

  /* Hero */
  #hero { padding-top: 32px; padding-bottom: 28px; }
  .hero-name { font-size: 26px; }
  .hero-roles { font-size: 10px; line-height: 1.7; }
  .hero-roles span { margin: 0 4px; }

  /* Sections */
  .section { padding: 36px 0; }

  /* Story */
  .story-body { font-size: 15px; }
  .timeline-row { grid-template-columns: 68px 1fr; gap: 0 12px; }
  .tl-years { font-size: 9px; }

  /* Portfolio: single column, no featured wide card */
  .portfolio-grid { grid-template-columns: 1fr; }
  .portfolio-card.featured { grid-template-columns: 1fr; }
  .portfolio-card.featured .portfolio-card-media { height: 160px; }

  /* Blog: date drops below title */
  .blog-item { grid-template-columns: 1fr; gap: 4px; }
  .bi-date { font-size: 10px; color: var(--ink-faint); }

  /* Notes */
  .note-item { grid-template-columns: 1fr; gap: 4px; }
  .note-date { font-size: 10px; }

  /* CTA */
  .cta-section { padding: 48px 0 36px; }
  .cta-headline { font-size: 20px; }

  /* Chat panel full width on mobile */
  #chat-panel { width: calc(100vw - 32px); right: 16px; bottom: 72px; }
  #chat-toggle { bottom: 20px; right: 16px; }
}

@media (max-width: 400px) {
  .hero-name { font-size: 22px; }
  .nav-links a { padding: 8px 10px 12px; font-size: 11px; }
}