/* ════════════════════════════════════════════════════
   DeepCog.ai — deepcog-white.css
   Global white & blue stylesheet — matching openGenomeLLM.org
   Used by: index.html, about.html, models.html,
            research.html, contact.html
   Fonts loaded via Google Fonts link in each HTML <head>
════════════════════════════════════════════════════ */

/* ── TOKENS ────────────────────────────────────────── */
:root {
  --bg:       #ffffff;
  --bg2:      #f7f9fc;
  --bg3:      #eef1f8;
  --surface:  #ffffff;
  --border:   #e1e5ee;
  --border2:  #c0cbdf;
  --blue:     #2563eb;
  --blue2:    #1d4ed8;
  --blue-lt:  #eff4ff;
  --green:    #059669;
  --green2:   #047857;
  --pink:     #dc2626;
  --amber:    #b45309;
  --text:     #111827;
  --text2:    #4b5563;
  --text3:    #9ca3af;
  /* Aliases so any page using var(--cyan) still works */
  --cyan:     #2563eb;
  --cyan2:    #1d4ed8;
  --glow-c:   rgba(37,99,235,0.12);
  --ff-head:  'Roboto Slab', serif;
  --ff-mono:  'Roboto Mono', monospace;
  --ff-body:  'Roboto', sans-serif;
}

/* ── RESET ─────────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--ff-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.65;
}
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--blue2); border-radius: 3px; }
::selection { background: rgba(37,99,235,0.15); }

/* ── NAV ───────────────────────────────────────────── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 5%; height: 64px;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; font-family: var(--ff-head);
  font-weight: 700; font-size: 1.3rem; flex-shrink: 0;
}
.nav-logo .deep { color: var(--blue); }
.nav-logo .cog  { color: var(--green); }
.nav-logo .ai   {
  color: var(--text3); font-size: 0.8rem; font-weight: 400;
  font-family: var(--ff-mono); margin-left: 2px;
}
.nav-logo svg { width: 30px; height: 30px; }

.dcl-tagline {
  font-family: var(--ff-mono); font-size: 0.65rem; font-weight: 500;
  letter-spacing: 0.16em; color: var(--text3); text-transform: uppercase;
  margin-top: 2px; white-space: nowrap;
}

.nav-links { display: flex; align-items: center; gap: 1.75rem; list-style: none; }
.nav-links a {
  color: var(--text2); text-decoration: none;
  font-size: 0.875rem; font-weight: 500;
  transition: color 0.15s; position: relative;
}
.nav-links a:hover { color: var(--blue); }
.nav-links a.active { color: var(--blue); font-weight: 600; }
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0; right: 0;
  height: 2px; background: var(--blue); transform: scaleX(0);
  transition: transform 0.15s; border-radius: 2px;
}
.nav-links a:hover::after, .nav-links a.active::after { transform: scaleX(1); }

.nav-cta {
  background: var(--blue) !important;
  border: none !important;
  color: #fff !important;
  padding: 8px 20px !important;
  border-radius: 6px !important;
  font-weight: 600 !important;
  font-size: 0.875rem !important;
  box-shadow: 0 2px 8px rgba(37,99,235,0.3) !important;
  transition: background 0.15s, transform 0.15s !important;
}
.nav-cta:hover {
  background: var(--blue2) !important;
  transform: translateY(-1px) !important;
}
.nav-cta::after { display: none !important; }

/* ── MAIN / SECTIONS ───────────────────────────────── */
main { position: relative; z-index: 1; padding-top: 64px; }
section { padding: 80px 5%; }
section:nth-child(even) { background: var(--bg2); }

.section-label {
  font-family: var(--ff-mono); font-size: 0.68rem; letter-spacing: 0.18em;
  color: var(--blue); text-transform: uppercase; margin-bottom: 10px;
  display: flex; align-items: center; gap: 10px;
}
.section-label::before {
  content: ''; display: inline-block;
  width: 20px; height: 2px; background: var(--blue); border-radius: 1px;
}

/* ── PAGE HERO (inner pages) ───────────────────────── */
.page-hero {
  padding: 72px 5% 56px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--blue-lt) 0%, var(--bg) 100%);
}
.page-hero h1 { margin-bottom: 14px; font-size: clamp(1.8rem, 3.5vw, 3rem); }
.page-hero p  { color: var(--text2); max-width: 600px; font-size: 1.05rem; }

/* ── HEADINGS ──────────────────────────────────────── */
h1, h2, h3, h4 { font-family: var(--ff-head); color: var(--text); line-height: 1.2; }
h1 { font-size: clamp(2.2rem, 5vw, 4rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.5rem); font-weight: 700; letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; font-weight: 600; }

.gradient-text {
  background: linear-gradient(135deg, var(--blue) 0%, var(--green) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ── CARDS ─────────────────────────────────────────── */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 28px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
}
.card:hover {
  border-color: var(--border2);
  box-shadow: 0 8px 30px rgba(37,99,235,0.12);
  transform: translateY(-3px);
}

/* ── BUTTONS ───────────────────────────────────────── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--blue); color: #fff;
  font-family: var(--ff-body); font-weight: 600; font-size: 0.95rem;
  padding: 12px 26px; border: none; border-radius: 8px;
  cursor: pointer; text-decoration: none;
  box-shadow: 0 2px 10px rgba(37,99,235,0.3);
  transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
}
.btn-primary:hover {
  background: var(--blue2); transform: translateY(-2px);
  box-shadow: 0 4px 18px rgba(37,99,235,0.4);
}
.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; color: var(--blue);
  font-family: var(--ff-body); font-weight: 600; font-size: 0.95rem;
  padding: 11px 24px; border: 1.5px solid var(--blue); border-radius: 8px;
  cursor: pointer; text-decoration: none;
  transition: background 0.15s, transform 0.15s;
}
.btn-ghost:hover { background: var(--blue-lt); transform: translateY(-2px); }

/* Small button variants (research page paper cards) */
.btn-sm-primary {
  display: inline-flex; align-items: center;
  background: var(--blue); color: #fff;
  font-family: var(--ff-body); font-weight: 600; font-size: 0.8rem;
  padding: 7px 16px; border: none; border-radius: 6px;
  cursor: pointer; text-decoration: none;
  transition: background 0.15s; white-space: nowrap;
}
.btn-sm-primary:hover { background: var(--blue2); }
.btn-sm-ghost {
  display: inline-flex; align-items: center;
  background: #fff; color: var(--text2);
  font-family: var(--ff-body); font-size: 0.8rem;
  padding: 6px 14px; border: 1px solid var(--border2); border-radius: 6px;
  cursor: pointer; text-decoration: none;
  transition: border-color 0.15s, color 0.15s; white-space: nowrap;
}
.btn-sm-ghost:hover { border-color: var(--blue); color: var(--blue); }

/* ── TAGS ──────────────────────────────────────────── */
.tag {
  display: inline-block; font-family: var(--ff-mono);
  font-size: 0.68rem; letter-spacing: 0.05em;
  padding: 3px 10px; border-radius: 4px; border: 1px solid;
}
.tag-cyan  { color: #1d4ed8; border-color: #bfdbfe; background: #eff6ff; }
.tag-green { color: #065f46; border-color: #a7f3d0; background: #ecfdf5; }
.tag-pink  { color: #991b1b; border-color: #fecaca; background: #fef2f2; }
.tag-amber { color: #78350f; border-color: #fde68a; background: #fffbeb; }

/* ── DIVIDER ───────────────────────────────────────── */
.divider { height: 1px; background: var(--border); margin: 0 5%; }

/* ── STAT ROW ──────────────────────────────────────── */
.stats-row {
  display: grid; grid-template-columns: repeat(4,1fr);
  border: 1px solid var(--border); border-radius: 10px;
  overflow: hidden; margin-top: 56px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.stat-cell {
  background: var(--surface); padding: 32px 24px; text-align: center;
  border-right: 1px solid var(--border);
}
.stat-cell:last-child { border-right: none; }
.stat-num {
  font-family: var(--ff-head); font-size: 2.5rem; font-weight: 800;
  color: var(--blue); line-height: 1;
}
.stat-label {
  font-family: var(--ff-mono); font-size: 0.68rem; letter-spacing: 0.1em;
  color: var(--text3); text-transform: uppercase; margin-top: 6px;
}

/* ── GRIDS ─────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: 22px; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }

/* ── MODEL STRIP (index) ───────────────────────────── */
.models-strip {
  padding: 20px 5%; background: var(--bg2);
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 10px; overflow-x: auto;
}
.models-strip-label {
  font-family: var(--ff-mono); font-size: 0.68rem; color: var(--text3);
  letter-spacing: 0.12em; white-space: nowrap; flex-shrink: 0;
}
.model-chip {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--blue-lt); border: 1px solid #bfdbfe;
  border-radius: 5px; padding: 4px 12px;
  font-family: var(--ff-mono); font-size: 0.72rem;
  color: var(--blue); white-space: nowrap; flex-shrink: 0;
}
.model-chip .dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--green);
  animation: dcPulse 2s infinite;
}

/* ── ABOUT VISUAL (code block) ─────────────────────── */
.about-visual {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 10px; padding: 28px;
  font-family: var(--ff-mono); font-size: 0.78rem; color: var(--text2); line-height: 2;
}
.about-visual .kw  { color: var(--blue); }
.about-visual .fn  { color: var(--green); }
.about-visual .str { color: #0f766e; }
.about-visual .num { color: var(--amber); }
.about-visual .com { color: var(--text3); }

/* ── MONO CODE BLOCK ───────────────────────────────── */
.mono-block {
  font-family: var(--ff-mono); font-size: 0.8rem; color: var(--blue2);
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 8px; padding: 16px 20px; line-height: 1.8; overflow-x: auto;
}

/* ── ABOUT PAGE ────────────────────────────────────── */
.mission-block {
  background: var(--blue-lt); border: 1px solid #bfdbfe;
  border-left: 4px solid var(--blue); border-radius: 8px;
  padding: 28px 32px;
}
.mission-block p { color: var(--text); font-size: 1.05rem; font-style: italic; font-weight: 300; }

.team-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 28px; text-align: center;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  transition: all 0.2s;
}
.team-card:hover {
  border-color: var(--border2); transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(37,99,235,0.12);
}
.team-avatar {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--blue-lt); border: 2px solid #bfdbfe;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; margin: 0 auto 16px;
}
.team-name { font-family: var(--ff-head); font-weight: 700; font-size: 1rem; margin-bottom: 4px; }
.team-role { font-family: var(--ff-mono); font-size: 0.7rem; color: var(--blue); letter-spacing: 0.08em; margin-bottom: 12px; }
.team-bio  { font-size: 0.82rem; color: var(--text2); line-height: 1.65; }

.value-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 28px;
  display: flex; gap: 20px; align-items: flex-start;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06); transition: all 0.2s;
}
.value-card:hover { border-color: var(--border2); box-shadow: 0 8px 30px rgba(37,99,235,0.12); }
.value-icon { font-size: 1.8rem; flex-shrink: 0; }
.value-card h3 { margin-bottom: 8px; }
.value-card p  { font-size: 0.85rem; color: var(--text2); line-height: 1.65; }

.location-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 28px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.location-flag { font-size: 2rem; margin-bottom: 12px; }
.location-city { font-family: var(--ff-head); font-weight: 700; font-size: 1.2rem; margin-bottom: 4px; }
.location-type { font-family: var(--ff-mono); font-size: 0.68rem; color: var(--blue); letter-spacing: 0.1em; margin-bottom: 12px; }
.location-addr { font-size: 0.85rem; color: var(--text2); line-height: 1.7; }

/* ── RESEARCH PAGE ─────────────────────────────────── */
.research-areas {
  display: grid; grid-template-columns: repeat(3,1fr);
  gap: 1px; background: var(--border);
  border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
  margin-bottom: 80px;
}
.research-area {
  background: var(--surface); padding: 32px 28px; transition: background 0.15s;
}
.research-area:hover { background: var(--blue-lt); }
.area-icon  { font-size: 1.8rem; margin-bottom: 12px; }
.area-title { font-family: var(--ff-head); font-weight: 700; margin-bottom: 8px; color: var(--text); }
.area-desc  { font-size: 0.85rem; color: var(--text2); line-height: 1.7; }

.paper-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 28px 32px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  transition: all 0.2s; display: grid;
  grid-template-columns: 1fr auto; gap: 24px;
  align-items: start; margin-bottom: 16px;
}
.paper-card:hover {
  border-color: var(--border2); transform: translateX(4px);
  box-shadow: 0 8px 30px rgba(37,99,235,0.12);
}
.paper-meta    { font-family: var(--ff-mono); font-size: 0.68rem; color: var(--text3); letter-spacing: 0.08em; margin-bottom: 8px; }
.paper-title   { font-family: var(--ff-head); font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.paper-authors { font-size: 0.82rem; color: var(--text2); margin-bottom: 10px; }
.paper-abstract{ font-size: 0.82rem; color: var(--text2); line-height: 1.7; }
.paper-actions { display: flex; flex-direction: column; gap: 8px; align-items: flex-end; flex-shrink: 0; }

.method-steps { display: grid; grid-template-columns: repeat(4,1fr); margin-top: 48px; }
.method-step  { padding: 32px 24px; text-align: center; position: relative; }
.method-step:not(:last-child)::after {
  content: '→'; position: absolute; right: -10px; top: 50%;
  transform: translateY(-50%); color: var(--blue); font-size: 1.2rem; z-index: 2;
}
.step-num   { font-family: var(--ff-mono); font-size: 0.65rem; color: var(--text3); letter-spacing: 0.15em; margin-bottom: 12px; }
.step-icon  { font-size: 2rem; margin-bottom: 12px; }
.step-title { font-family: var(--ff-head); font-weight: 700; font-size: 0.95rem; margin-bottom: 8px; color: var(--text); }
.step-desc  { font-size: 0.8rem; color: var(--text2); line-height: 1.6; }

/* ── CONTACT PAGE ──────────────────────────────────── */
.contact-form {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: 40px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}
.contact-form h3 { margin-bottom: 8px; }
.contact-form .sub { color: var(--text2); font-size: 0.875rem; margin-bottom: 32px; }

.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; font-family: var(--ff-mono); font-size: 0.68rem;
  letter-spacing: 0.12em; color: var(--text2); text-transform: uppercase; margin-bottom: 6px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; background: var(--bg2); border: 1.5px solid var(--border);
  border-radius: 6px; padding: 12px 16px; font-family: var(--ff-body);
  font-size: 0.9rem; color: var(--text); outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
  background: var(--surface);
}
.form-group select option { background: var(--surface); color: var(--text); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-submit {
  width: 100%; padding: 14px;
  background: var(--blue); color: #fff;
  border: none; border-radius: 8px; font-family: var(--ff-head);
  font-weight: 700; font-size: 0.95rem; cursor: pointer;
  transition: background 0.15s, transform 0.15s; margin-top: 8px;
}
.form-submit:hover { background: var(--blue2); transform: translateY(-1px); }

.inquiry-types { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 32px; }
.inquiry-type {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 8px; padding: 16px; cursor: pointer;
  transition: all 0.15s; text-align: center;
}
.inquiry-type:hover { border-color: var(--blue); background: var(--blue-lt); }
.inquiry-type .icon  { font-size: 1.5rem; margin-bottom: 6px; }
.inquiry-type .label { font-family: var(--ff-mono); font-size: 0.68rem; color: var(--text2); letter-spacing: 0.06em; }

.info-section { margin-bottom: 40px; }
.info-section h4 {
  font-family: var(--ff-mono); font-size: 0.68rem; letter-spacing: 0.15em;
  color: var(--text3); text-transform: uppercase; margin-bottom: 16px;
}
.info-item { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 16px; }
.info-icon  { font-size: 1.1rem; flex-shrink: 0; margin-top: 2px; }
.info-label { font-family: var(--ff-mono); font-size: 0.7rem; color: var(--text3); letter-spacing: 0.08em; margin-bottom: 3px; }
.info-value { font-size: 0.875rem; color: var(--text); }
.info-value a { color: var(--blue); text-decoration: none; }
.info-value a:hover { text-decoration: underline; }

.social-links { display: flex; gap: 10px; flex-wrap: wrap; }
.social-link {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 6px; padding: 9px 14px; color: var(--text2);
  text-decoration: none; font-family: var(--ff-mono); font-size: 0.72rem;
  transition: all 0.15s;
}
.social-link:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-lt); }

/* ── FOOTER ────────────────────────────────────────── */
footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--border);
  padding: 56px 5% 28px; background: var(--bg2);
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand p { color: var(--text2); font-size: 0.875rem; margin-top: 12px; line-height: 1.7; max-width: 280px; }
.footer-col h4  {
  font-family: var(--ff-mono); font-size: 0.68rem; letter-spacing: 0.15em;
  color: var(--text3); text-transform: uppercase; margin-bottom: 14px;
}
.footer-col ul  { list-style: none; }
.footer-col ul li { margin-bottom: 9px; }
.footer-col ul a { color: var(--text2); text-decoration: none; font-size: 0.875rem; transition: color 0.15s; }
.footer-col ul a:hover { color: var(--blue); }
.footer-bottom {
  border-top: 1px solid var(--border); padding-top: 22px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.78rem; color: var(--text3); font-family: var(--ff-mono);
}

/* ── ANIMATIONS ────────────────────────────────────── */
@keyframes fadeUp   { from { opacity:0; transform:translateY(24px); } to { opacity:1; transform:translateY(0); } }
@keyframes dcPulse  { 0%,100% { opacity:0.5; } 50% { opacity:1; } }
.fade-up   { animation: fadeUp 0.6s ease both; }
.fade-up-2 { animation: fadeUp 0.6s 0.12s ease both; }
.fade-up-3 { animation: fadeUp 0.6s 0.24s ease both; }
.fade-up-4 { animation: fadeUp 0.6s 0.36s ease both; }

/* ── RESPONSIVE ────────────────────────────────────── */
@media (max-width: 900px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: repeat(2,1fr); }
  .stats-row { grid-template-columns: repeat(2,1fr); }
  .stat-cell { border-right: none; border-bottom: 1px solid var(--border); }
  .stat-cell:last-child { border-bottom: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .research-areas { grid-template-columns: 1fr 1fr; }
  .method-steps { grid-template-columns: 1fr 1fr; }
  .method-step:not(:last-child)::after { display: none; }
  .paper-card { grid-template-columns: 1fr; }
  .paper-actions { flex-direction: row; }
  .form-row { grid-template-columns: 1fr; }
  .inquiry-types { grid-template-columns: repeat(4,1fr); }
}
@media (max-width: 560px) {
  nav { padding: 0 4%; }
  section { padding: 60px 4%; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .research-areas { grid-template-columns: 1fr; }
  .method-steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .inquiry-types { grid-template-columns: 1fr 1fr; }
}

/* ── Legal links bar (above footer-bottom) ── */
.footer-legal-links {
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
  padding: 22px 0 26px;
  margin-bottom: 24px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  font-family: var(--ff-body); font-size: 0.95rem; font-weight: 500;
}
.footer-legal-links a {
  color: var(--text2); text-decoration: none;
  transition: color 0.15s;
}
.footer-legal-links a:hover { color: var(--blue); text-decoration: underline; }
.footer-legal-links .sep { color: var(--border2); font-weight: 300; }
