/* DNAx — Açık klinik / akademik dergi design tokens */
:root {
  /* Neutrals — warm off-white paper */
  --paper: #F6F3EC;
  --paper-2: #EEEAE0;
  --ink: #0E1116;
  --ink-2: #1C2230;
  --muted: #6B6F78;
  --rule: #D9D3C6;
  --rule-2: #C7C0AF;

  /* Accent — deep editorial blue, pulled from the logo */
  --blue-900: #0A1E5C;
  --blue-700: #1A3FB8;
  --blue-500: #2E63F2;
  --blue-300: #7FA0FF;
  --blue-50:  #E8EEFF;

  /* Silver from logo */
  --silver: #9AA0AA;
  --silver-2: #C9CDD3;

  /* Semantic */
  --bg: var(--paper);
  --bg-alt: var(--paper-2);
  --fg: var(--ink);
  --fg-muted: var(--muted);
  --accent: var(--blue-700);
  --accent-strong: var(--blue-900);
  --line: var(--rule);

  /* Type — editorial serif + grotesk */
  --font-serif: 'Cormorant Garamond', 'Cormorant', Georgia, 'Times New Roman', serif;
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Inter Tight', 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Spacing scale */
  --s-1: 4px; --s-2: 8px; --s-3: 12px; --s-4: 16px; --s-5: 24px;
  --s-6: 32px; --s-7: 48px; --s-8: 64px; --s-9: 96px; --s-10: 128px;

  /* Radii */
  --r-1: 2px; --r-2: 4px; --r-3: 8px; --r-4: 14px;

  /* Container */
  --container: 1200px;
  --container-wide: 1360px;
}

/* Dark mode — editorial night palette
   Warm off-white "paper" inverts to warm-tinted dark, blue accent shifts brighter.
   Health bg blobs desaturate; cards become elevated dark surfaces. */
[data-theme="dark"] {
  --paper: #0E1218;
  --paper-2: #161B24;
  --ink: #ECE6D7;
  --ink-2: #C7C0AF;
  --muted: #8C8F98;
  --rule: #242A35;
  --rule-2: #2F3744;

  --blue-900: #4A6BFF;
  --blue-700: #6788FF;
  --blue-500: #87A2FF;
  --blue-300: #A8BAFF;
  --blue-50:  #1B2440;

  --silver: #6B7281;
  --silver-2: #4A5161;

  --bg: var(--paper);
  --bg-alt: var(--paper-2);
  --fg: var(--ink);
  --fg-muted: var(--muted);
  --accent: var(--blue-500);
  --accent-strong: var(--blue-300);
  --line: var(--rule);

  /* Surface helpers (cards/inputs use #fff in light mode) */
  --surface: #181D26;
  --surface-2: #1F2530;
}

/* Generic surface fixes for dark — anywhere we hard-coded #fff */
[data-theme="dark"] .card,
[data-theme="dark"] .panel-card,
[data-theme="dark"] .pl-card,
[data-theme="dark"] .panel-specsheet,
[data-theme="dark"] .analyte-cell,
[data-theme="dark"] .aud-card,
[data-theme="dark"] .prof-card,
[data-theme="dark"] .team-card,
[data-theme="dark"] .prin-cell,
[data-theme="dark"] .bundle-card,
[data-theme="dark"] .single-cell,
[data-theme="dark"] .cmp-table,
[data-theme="dark"] .admin-table,
[data-theme="dark"] .admin-stat,
[data-theme="dark"] .side,
[data-theme="dark"] .pane,
[data-theme="dark"] .checkout-form,
[data-theme="dark"] .auth-card,
[data-theme="dark"] .scene-stage,
[data-theme="dark"] .rv-page,
[data-theme="dark"] .rv-side,
[data-theme="dark"] .cal,
[data-theme="dark"] .booked-list li,
[data-theme="dark"] .order,
[data-theme="dark"] .auth-chip,
[data-theme="dark"] .auth-menu { background: var(--surface); }

[data-theme="dark"] .auth-menu::before { background: var(--surface); }

/* Tweaks panel + organic bg recolor */
[data-theme="dark"] .tweaks-panel { background: var(--surface); }
[data-theme="dark"] .summary { background: var(--surface-2); }
[data-theme="dark"] .tile { background: var(--surface-2); }
[data-theme="dark"] .report-viewer { background: var(--surface-2); }
[data-theme="dark"] .rv-head { background: var(--surface); }
[data-theme="dark"] .upload-zone { background: var(--surface-2); }
[data-theme="dark"] .demo-hint { background: var(--surface-2); }
[data-theme="dark"] .field-grid input,
[data-theme="dark"] .field-grid select,
[data-theme="dark"] .auth-card input { background: var(--surface-2); color: var(--ink); border-color: var(--rule-2); }

/* Buttons + nav backdrop */
[data-theme="dark"] .btn { background: var(--ink); color: var(--paper); border-color: var(--ink); }
[data-theme="dark"] .btn:hover { background: var(--accent); color: var(--paper); border-color: var(--accent); }
[data-theme="dark"] .btn.ghost { background: transparent; color: var(--ink); border-color: var(--rule-2); }
[data-theme="dark"] .btn.ghost:hover { background: var(--ink); color: var(--paper); }
[data-theme="dark"] .btn.accent { background: var(--accent); color: #0B0D12; border-color: var(--accent); }
[data-theme="dark"] .btn.accent:hover { background: var(--blue-300); border-color: var(--blue-300); }

[data-theme="dark"] .lang-toggle button.on { background: var(--ink); color: var(--paper); }

/* Footer stays dark in both modes — make it slightly different from bg */
[data-theme="dark"] footer.site-footer { background: #07090D; }
[data-theme="dark"] footer.site-footer h4 { color: #ECE6D7; }

/* Hero/section overrides that used inline gradients pointing at light tints */
[data-theme="dark"] .hero {
  background:
    radial-gradient(ellipse 80% 60% at 80% 10%, rgba(103,136,255,0.10), transparent 60%),
    radial-gradient(ellipse 50% 40% at 10% 90%, rgba(74,107,255,0.08), transparent 60%),
    var(--bg) !important;
}
[data-theme="dark"] .big-cta { background: #04060A; }
[data-theme="dark"] .big-cta p { color: var(--ink-2); }

/* Organic bg blobs become much subtler in dark */
[data-theme="dark"] #bg-organic .bg-svg rect:first-of-type { fill: #0E1218; }
[data-theme="dark"] #bg-organic .bg-svg [fill="url(#bg-mint)"],
[data-theme="dark"] #bg-organic .bg-svg [fill="url(#bg-sage)"],
[data-theme="dark"] #bg-organic .bg-svg [fill="url(#bg-teal)"],
[data-theme="dark"] #bg-organic .bg-svg [fill="url(#bg-cream)"] { opacity: 0.35; }
[data-theme="dark"] #bg-organic .bg-svg [stroke="#3F7A5C"] { stroke: #6FA890; stroke-opacity: 0.08; }
[data-theme="dark"] #bg-organic .bg-svg [stroke="#1A3FB8"] { stroke: #6788FF; }
[data-theme="dark"] #bg-organic .bg-svg [fill="#1A3FB8"] { fill: #6788FF; }
[data-theme="dark"] #bg-organic .bg-svg [fill="#1F8A5B"] { fill: #4FCB94; }

/* Status pill backgrounds */
[data-theme="dark"] .status.delivered { background: rgba(31,138,91,0.12); }
[data-theme="dark"] .status.transit { background: rgba(201,138,24,0.12); color: #E0C27A; border-color: #6E5C2F; }

/* Journey scene track + tube tube interior in dark */
[data-theme="dark"] .scene-tube .tube-wrap svg [fill="#fff"] { fill: #181D26; }
[data-theme="dark"] .scene-tube .tube-wrap svg [stroke="#0E1116"] { stroke: var(--ink); }
[data-theme="dark"] .scene-tube .tube-wrap svg [fill="#1A3FB8"] { fill: var(--accent); }
[data-theme="dark"] .scene-lab .lab-wrap svg [fill="#fff"] { fill: var(--surface); }
[data-theme="dark"] .scene-lab .lab-wrap svg [fill="#F6F3EC"] { fill: var(--surface-2); }
[data-theme="dark"] .scene-lab .lab-wrap svg [fill="#E8EEFF"] { fill: var(--blue-50); }
[data-theme="dark"] .scene-lab .lab-wrap svg [stroke="#0E1116"] { stroke: var(--ink); }
[data-theme="dark"] .scene-order .pkg svg [fill="#F6F3EC"] { fill: var(--surface-2); }
[data-theme="dark"] .scene-order .pkg svg [fill="#EEEAE0"] { fill: var(--surface); }
[data-theme="dark"] .scene-order .pkg svg [fill="#fff"] { fill: var(--surface); }
[data-theme="dark"] .scene-order .pkg svg [stroke="#0E1116"] { stroke: var(--ink); }
[data-theme="dark"] .scene-order .pkg svg [stroke="#1A3FB8"] { stroke: var(--accent); }
[data-theme="dark"] .scene-report .doc { background: var(--surface); border-color: var(--rule-2); }

/* Theme toggle button */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px; height: 36px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background .2s ease, color .2s ease, border-color .2s ease, transform .3s ease;
  flex: 0 0 auto;
}
.theme-toggle:hover { border-color: var(--ink); background: var(--bg-alt); }
.theme-toggle svg { width: 16px; height: 16px; transition: transform .5s cubic-bezier(.2,.7,.2,1); }
.theme-toggle .sun { display: none; }
.theme-toggle .moon { display: block; }
[data-theme="dark"] .theme-toggle .sun { display: block; }
[data-theme="dark"] .theme-toggle .moon { display: none; }
[data-theme="dark"] .theme-toggle svg { transform: rotate(180deg); }

/* Smooth theme transition */
html.theme-trans, html.theme-trans body, html.theme-trans * {
  transition: background-color .35s ease, color .35s ease, border-color .35s ease, fill .35s ease, stroke .35s ease !important;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 500; letter-spacing: -0.01em; margin: 0; color: var(--fg); }
h1 { font-size: clamp(48px, 6.4vw, 104px); line-height: 1.02; letter-spacing: -0.025em; }
h2 { font-size: clamp(34px, 3.8vw, 58px); line-height: 1.05; letter-spacing: -0.02em; }
h3 { font-size: clamp(22px, 1.9vw, 30px); line-height: 1.2; }
h4 { font-size: 17px; line-height: 1.3; font-family: var(--font-sans); font-weight: 600; letter-spacing: 0; }

p { margin: 0; }
a { color: inherit; text-decoration: none; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 32px; }
.container-wide { max-width: var(--container-wide); margin: 0 auto; padding: 0 32px; }

/* Eyebrow / small caps label */
.eyebrow {
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-2);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: 0.7;
}
.eyebrow.center::before, .eyebrow.no-line::before { display: none; }

.rule { height: 1px; background: var(--line); width: 100%; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  border-radius: 999px;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
}
.btn:hover { transform: translateY(-1px); background: var(--blue-900); border-color: var(--blue-900); }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: var(--paper); transform: translateY(-1px); }
.btn.accent { background: var(--blue-700); border-color: var(--blue-700); color: #fff; }
.btn.accent:hover { background: var(--blue-900); border-color: var(--blue-900); }

.arrow { display: inline-block; transition: transform .2s ease; }
.btn:hover .arrow, a:hover .arrow { transform: translate(3px, -3px); }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--container-wide); margin: 0 auto; padding: 18px 32px;
}
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-size: 22px; font-weight: 500; letter-spacing: -0.01em; }
.brand-mark { width: 22px; height: 28px; color: var(--blue-700); }
.brand .x { color: var(--blue-700); font-style: italic; }

.nav-links { display: flex; align-items: center; gap: 28px; font-size: 14px; color: var(--fg); }
.nav-links a { position: relative; padding: 6px 0; }
.nav-links a:hover { color: var(--accent); }
.nav-links a.active::after { content:""; position:absolute; left:0; right:0; bottom:-2px; height:1px; background: var(--accent); }

.nav-right { display: flex; align-items: center; gap: 16px; }

.lang-toggle { display: inline-flex; font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--fg-muted); border: 1px solid var(--line); border-radius: 999px; overflow: hidden; }
.lang-toggle button { background: transparent; border: 0; padding: 6px 12px; color: inherit; cursor: pointer; font: inherit; letter-spacing: inherit; text-transform: inherit; }
.lang-toggle button.on { background: var(--ink); color: var(--paper); }

/* Section */
section { padding: 96px 0; position: relative; }
section.tight { padding: 72px 0; }
section + section { border-top: 1px solid var(--line); }

.section-head { display: grid; grid-template-columns: 1fr 2fr; gap: 64px; align-items: end; margin-bottom: 56px; }
.section-head h2 { max-width: 18ch; }
.section-head p { color: var(--fg-muted); max-width: 52ch; font-size: 16px; }
@media (max-width: 820px) { .section-head { grid-template-columns: 1fr; gap: 20px; } }

/* Cards */
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-3);
  padding: 28px;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.card:hover { transform: translateY(-3px); border-color: var(--ink-2); box-shadow: 0 20px 40px -24px rgba(14,17,22,0.25); }

/* Footer */
footer.site-footer {
  background: var(--ink);
  color: #C7C0AF;
  padding: 80px 0 32px;
  border-top: 0;
}
footer.site-footer .container-wide { color: inherit; }
footer.site-footer h4 { color: #fff; font-family: var(--font-sans); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; margin-bottom: 18px; font-weight: 500; }
footer.site-footer a { color: #C7C0AF; }
footer.site-footer a:hover { color: #fff; }

/* Utility */
.stack > * + * { margin-top: var(--s-5); }
.mono { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.02em; color: var(--fg-muted); }
.tag { display: inline-block; font-family: var(--font-sans); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--fg-muted); border: 1px solid var(--line); padding: 5px 10px; border-radius: 999px; }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .9s ease, transform .9s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* scrollbars soft */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--rule-2); border-radius: 10px; }
::-webkit-scrollbar-track { background: transparent; }

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation: none !important; }
}