/* ===========================================================
   DESIGN TOKENS
   Palette pulled from real unified-diff / GitHub review colors —
   the actual visual language of differential testing, his domain.
   =========================================================== */
:root{
  --paper:        #F3F5F8;
  --surface:      #FFFFFF;
  --surface-dim:  #EEF1F4;
  --line:         #D8DEE4;
  --line-soft:    #E5E9EE;

  --ink:          #161B22;
  --ink-muted:    #57606A;
  --ink-faint:    #8B949E;

  --add:          #1A7F37;
  --add-bg:       #DAFBE1;
  --add-line:     #B4E6BE;

  --del:          #CF222E;
  --del-bg:       #FFEBE9;
  --del-line:     #F3C2C2;

  --signal:       #9A6700;
  --signal-bg:    #FFF8C5;
  --signal-line:  #EAD37A;

  --radius-sm:    6px;
  --radius-md:    10px;
  --radius-lg:    16px;

  --font-display: 'Fraunces', serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, monospace;

  --maxw: 1080px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

body{
  margin:0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a{ color: inherit; }
a:focus-visible, button:focus-visible{
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.wrap{
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

/* ===========================================================
   HERO
   =========================================================== */
.hero{
  background:
    linear-gradient(180deg, #FAFBFC 0%, var(--paper) 100%);
  border-bottom: 1px solid var(--line);
  padding-top: 56px;
}

.hero-grid{
  display: grid;
  grid-template-columns: 1.35fr 0.9fr;
  gap: 56px;
  align-items: start;
}

.repo-tag{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-faint);
  margin: 0 0 18px;
  letter-spacing: 0.01em;
}

/* --- terminal panel --- */
.terminal{
  background: var(--ink);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 1px 2px rgba(20,24,28,0.04), 0 12px 32px -16px rgba(20,24,28,0.35);
}
.terminal-tab{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: #9AA4AF;
  background: #20262E;
  padding: 10px 16px;
  border-bottom: 1px solid #2B323B;
}
.terminal-body{
  margin: 0;
  padding: 22px 20px 18px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.75;
  color: #C9D1D9;
  white-space: pre-wrap;
  overflow-x: auto;
}
.t-prompt{ color: #6E7681; }
.t-cmd{ color: #E6EDF3; }
.t-out{ color: #9AA4AF; }
.t-arrow{ color: #6E7681; }
.t-add{ color: #5FD888; font-weight: 600; }
.t-del{ color: #FF8B8B; font-weight: 600; }
.t-flag{ color: #F2C94C; font-weight: 600; }
.t-muted{ color: #6E7681; }
.terminal-caption{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  margin: 10px 2px 0;
  font-style: italic;
}

/* --- hero side / identity --- */
.hero-side{ padding-top: 4px; }

.avatar-slot{
  width: 92px; height: 92px;
  border-radius: 50%;
  border: 1.5px dashed var(--line);
  background: var(--surface-dim);
  margin-bottom: 22px;
  position: relative;
  overflow: hidden;
}
.avatar-slot img{
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}
.avatar-fallback{
  display: none;
  width: 100%; height: 100%;
  align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 30px;
  color: var(--ink-faint);
}

.name{
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 44px;
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  color: var(--ink);
}

.title{
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 500;
  font-size: 18px;
  color: var(--ink);
  margin: 0 0 14px;
  line-height: 1.4;
}

.affiliation{
  font-size: 14.5px;
  color: var(--ink-muted);
  margin: 0 0 8px;
  line-height: 1.5;
}
.location{
  font-size: 14px;
  color: var(--ink-faint);
  margin: 0 0 26px;
}

.cta-row{ display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.cta-row-secondary{ gap: 16px; margin-top: 4px; }

.btn{
  display: inline-flex;
  align-items: center;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  padding: 11px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--surface);
  text-decoration: none;
  transition: transform 0.12s ease, border-color 0.12s ease;
}
.btn:hover{ border-color: var(--ink-faint); transform: translateY(-1px); }
.btn-primary{
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.btn-primary:hover{ background: #262D36; border-color: #262D36; }
.btn-block{ width: 100%; justify-content: center; margin-top: 28px; padding: 14px; font-size: 15px; }

.btn-text{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.btn-text:hover{ border-bottom-color: var(--ink-muted); }

/* --- diffstat strip --- */
.diffstat-strip{
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 22px 28px 28px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--ink-muted);
}
.diffstat-item strong{ color: var(--ink); font-weight: 600; }
.diffstat-item.signal strong{ color: var(--signal); }
.diffstat-divider{ color: var(--line); }
.diffstat-bar{ display: inline-flex; gap: 3px; margin-left: 4px; }
.sq{ width: 9px; height: 9px; border-radius: 2px; display: inline-block; }
.sq.add{ background: var(--add); }
.sq.del{ background: var(--del); }

/* ===========================================================
   STICKY FILE NAV
   =========================================================== */
.filenav{
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(243,245,248,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.filenav-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 2px;
  padding-bottom: 2px;
}
.filenav-tabs{
  display: flex;
  overflow-x: auto;
  scrollbar-width: none;
}
.filenav-tabs::-webkit-scrollbar{ display: none; }

.filetab{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-muted);
  text-decoration: none;
  padding: 14px 14px;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.filetab:hover{ color: var(--ink); }
.filetab.active{
  color: var(--ink);
  border-bottom-color: var(--add);
}
.filenav-diffstat{
  font-family: var(--font-mono);
  font-size: 12.5px;
  white-space: nowrap;
  flex-shrink: 0;
}
.filenav-diffstat .add{ color: var(--add); }
.filenav-diffstat .del{ color: var(--del); margin-left: 4px; }

/* ===========================================================
   SECTIONS — general
   =========================================================== */
.section{
  padding: 64px 0;
  border-bottom: 1px solid var(--line-soft);
}
.section-contact{ border-bottom: none; }

.eyebrow{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
  text-transform: lowercase;
  letter-spacing: 0.02em;
  margin: 0 0 10px;
}
.eyebrow-spaced{ margin-top: 36px; }

.section-title{
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 30px;
  margin: 0 0 22px;
  letter-spacing: -0.01em;
}
.section-sub{
  color: var(--ink-muted);
  font-size: 15px;
  margin: -8px 0 28px;
  max-width: 640px;
}

/* --- summary --- */
.summary-quote{
  margin: 0;
  max-width: 720px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 400;
  line-height: 1.55;
  color: var(--ink);
  padding-left: 22px;
  border-left: 3px solid var(--add-line);
}

/* --- commit cards (experience) --- */
.commit-card{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 26px 28px;
  margin-bottom: 22px;
}
.commit-head{
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.commit-id{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  background: var(--surface-dim);
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 8px;
}
.commit-role{
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 17px;
  margin: 0 0 4px;
  line-height: 1.35;
}
.commit-meta{
  font-size: 13.5px;
  color: var(--ink-faint);
  margin: 0;
}
.commit-date{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-muted);
  white-space: nowrap;
  margin-top: 4px;
}

.diff-list{
  list-style: none;
  margin: 0;
  padding: 0;
}
.diff-list li{
  display: flex;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.55;
  padding: 5px 0;
  color: var(--ink);
}
.diff-mark{
  font-family: var(--font-mono);
  font-weight: 700;
  flex-shrink: 0;
  width: 14px;
}
.diff-mark.add{ color: var(--add); }
.diff-mark.del{ color: var(--del); }

/* --- thesis / research --- */
.thesis-name{
  font-family: var(--font-display);
  font-style: italic;
  font-size: 19px;
  margin: 0 0 24px;
  color: var(--ink);
}
.thesis-year{ color: var(--ink-faint); font-style: normal; font-family: var(--font-mono); font-size: 14px; }

.hunk-card{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin-bottom: 28px;
}
.hunk-header{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--signal);
  background: var(--signal-bg);
  display: inline-block;
  padding: 2px 10px;
  border-radius: 4px;
  margin: 0 0 12px;
}

.stat-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.stat-tile{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 20px 18px;
  text-align: left;
}
.stat-num{
  display: block;
  font-family: var(--font-display);
  font-weight: 650;
  font-size: 32px;
  color: var(--add);
  margin-bottom: 6px;
}
.stat-num.del{ color: var(--del); }
.stat-num.signal{ color: var(--signal); }
.stat-label{
  font-size: 13px;
  color: var(--ink-muted);
  line-height: 1.4;
}
.stat-label em{ font-style: normal; color: var(--ink-faint); }

/* --- linked repo card (research section) --- */
.repo-card{
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin-top: 18px;
  text-decoration: none;
  color: var(--ink);
  transition: border-color 0.12s ease, transform 0.12s ease;
}
.repo-card:hover{ border-color: var(--ink-faint); transform: translateY(-1px); }
.repo-card-head{
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.repo-card-icon{ color: var(--ink-faint); font-size: 15px; }
.repo-card-name{
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14.5px;
  color: var(--ink);
}
.repo-card-go{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-muted);
  margin-left: auto;
}
.repo-card-desc{
  font-size: 14px;
  color: var(--ink-muted);
  line-height: 1.55;
  margin: 0 0 14px;
  max-width: 680px;
}
.repo-card .tags{ margin: 0; }
.repo-card .tag{
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 4px 10px;
  background: var(--surface-dim);
}

/* --- advisories table --- */
.table-wrap{
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
}
.advisory-table{
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.advisory-table th{
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--ink-faint);
  font-weight: 500;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}
.advisory-table td{
  padding: 14px 18px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: middle;
}
.advisory-table tr:last-child td{ border-bottom: none; }
.advisory-table a{
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-muted);
}
.advisory-table a:hover{ color: var(--ink); text-decoration: underline; }

.cve-badge{
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  color: var(--signal);
  background: var(--signal-bg);
  border: 1px solid var(--signal-line);
  padding: 3px 9px;
  border-radius: 5px;
  white-space: nowrap;
}
.cve-badge.ghsa{ font-size: 11.5px; }

/* --- skills --- */
.skill-groups{ display: flex; flex-direction: column; gap: 22px; }
.skill-group h3{
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-faint);
  margin: 0 0 10px;
}
.tags{ display: flex; flex-wrap: wrap; gap: 8px; }
.tag{
  font-size: 13.5px;
  font-family: var(--font-body);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 6px 14px;
  color: var(--ink);
}

/* --- education --- */
.edu-row{
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
  flex-wrap: wrap;
}
.edu-row:last-of-type{ border-bottom: none; }
.edu-main h3{
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 16.5px;
  margin: 0 0 4px;
}
.edu-detail{
  font-size: 14px;
  color: var(--ink-muted);
  max-width: 600px;
  margin: 8px 0 0;
}
.edu-side{
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  flex-shrink: 0;
}
.edu-side time{
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-muted);
  white-space: nowrap;
}
.gpa-badge{
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--add-bg);
  color: var(--add);
  border: 1px solid var(--add-line);
  padding: 3px 9px;
  border-radius: 5px;
}

.lang-row{ display: flex; gap: 24px; }
.lang-item{ font-size: 14.5px; color: var(--ink-muted); }
.lang-item strong{ color: var(--ink); }

/* --- contact --- */
.contact-grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-bottom: 8px;
}
.contact-card{
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  text-decoration: none;
  transition: border-color 0.12s ease, transform 0.12s ease;
}
.contact-card:hover{ border-color: var(--ink-faint); transform: translateY(-1px); }
.contact-label{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  text-transform: lowercase;
}
.contact-value{
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  color: var(--ink);
}

/* --- footer --- */
.footer{ padding: 36px 0 56px; }
.signoff{
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
  margin: 0;
  text-align: center;
}

/* ===========================================================
   RESPONSIVE
   =========================================================== */
@media (max-width: 860px){
  .hero-grid{ grid-template-columns: 1fr; gap: 36px; }
  .hero-side{ order: -1; }
  .name{ font-size: 36px; }
  .stat-grid{ grid-template-columns: repeat(2, 1fr); }
  .contact-grid{ grid-template-columns: 1fr; }
}

@media (max-width: 560px){
  .wrap{ padding: 0 18px; }
  .hero{ padding-top: 36px; }
  .name{ font-size: 30px; }
  .title{ font-size: 16px; }
  .terminal-body{ font-size: 12.5px; }
  .commit-head{ flex-direction: column; }
  .commit-date{ margin-top: 0; }
  .stat-grid{ grid-template-columns: 1fr 1fr; gap: 10px; }
  .section-title{ font-size: 24px; }

  /* Advisories table -> stacked cards, no horizontal scroll needed */
  .table-wrap{ overflow-x: visible; }
  .advisory-table thead{ display: none; }
  .advisory-table, .advisory-table tbody, .advisory-table tr, .advisory-table td{
    display: block;
    width: 100%;
  }
  .advisory-table tr{
    padding: 16px 18px;
    border-bottom: 1px solid var(--line-soft);
  }
  .advisory-table tr:last-child{ border-bottom: none; }
  .advisory-table td{
    padding: 3px 0;
    border-bottom: none;
  }
  .advisory-table td:last-child{
    color: var(--ink-muted);
    font-size: 13px;
  }
}