/* =========================================================
   ProofX — Enhanced Styles (v2.1)
   - Hero one-line, no clipping
   - Founder layout hardened
   - Pill CTAs + a11y preserved
   ========================================================= */

/* ------------------------ Design Tokens ------------------------ */
:root {
  color-scheme: dark light;

  /* Spacing */
  --space-xxs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-xxl: 3rem;

  /* Typography */
  --font-primary: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --fw-normal: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --t-fast: 150ms ease;
  --t: 250ms ease;
  --t-slow: 350ms ease;

  /* Layers */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-popover: 1060;

  /* Dark theme (default) */
  --bg-1: #000000;
  --bg-2: #0a0a14;
  --bg-3: #11121a;
  --bg-card: #0e0f11;
  --bg-elev: #1a1b1e;

  --fg-1: #f5f7fb;
  --fg-2: #c7cddd;
  --fg-3: #9aa3b5;
  --fg-muted: #7b8497;

  --bd-1: #2a2b30;
  --bd-2: #191a1f;

  --accent-1: #a3e6ff;
  --accent-2: #5fd3ff;
  --accent-glow: rgba(163, 230, 255, 0.16);

  --success: #22c55e;
  --warn: #f59e0b;
  --error: #ef4444;

  --shadow-sm: 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 6px 18px rgba(0,0,0,.18);
  --shadow-lg: 0 12px 28px rgba(0,0,0,.25);

  --grad-ink: linear-gradient(135deg, var(--fg-1), var(--accent-1) 55%, var(--fg-1));
  --grad-card: linear-gradient(180deg, rgba(14,15,17,.94), rgba(14,15,17,.86));
  --grad-page: radial-gradient(1200px 600px at 20% 90%, rgba(163,230,255,.05), transparent 60%),
               linear-gradient(180deg, var(--bg-1), var(--bg-2));
}

/* Light theme */
@media (prefers-color-scheme: light) {
  :root {
    --bg-1: #ffffff;
    --bg-2: #f7f9fc;
    --bg-3: #f1f4f7;
    --bg-card: #ffffff;
    --bg-elev: #ffffff;

    --fg-1: #0b0c0f;
    --fg-2: #3b4250;
    --fg-3: #596177;
    --fg-muted: #7a8397;

    --bd-1: #e6e9f0;
    --bd-2: #ccd3df;

    --accent-1: #0ea5e9;
    --accent-2: #38bdf8;
    --accent-glow: rgba(14,165,233,.14);

    --grad-card: linear-gradient(180deg, rgba(255,255,255,.92), rgba(255,255,255,.86));
    --grad-page: linear-gradient(180deg, var(--bg-1), var(--bg-2));
  }
}

/* ------------------------ Base ------------------------ */
*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex; flex-direction: column;
  background: var(--grad-page);
  color: var(--fg-1);
  font-family: var(--font-primary);
  font-size: clamp(1rem, 1.2vw + .75rem, 1.125rem);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  color: var(--fg-1);
  font-weight: var(--fw-bold);
  line-height: 1.15;
  margin: 0 0 var(--space-md);
}
h1 { font-size: clamp(2.25rem, 5vw, 4rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); letter-spacing: -.01em; }
h3 { font-size: clamp(1.35rem, 2.4vw, 1.85rem); }

p { margin: 0 0 var(--space-md); }
a { color: var(--accent-1); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--accent-2); }

.mono { font-family: var(--font-mono); font-size: .95em; }
.muted { color: var(--fg-muted); }
.small { font-size: .875rem; }

/* Skip link */
.skip {
  position: absolute; top: -40px; left: 0;
  background: var(--accent-1); color: #001018;
  padding: var(--space-sm) var(--space-md);
  z-index: var(--z-popover);
  transition: top var(--t);
}
.skip:focus { top: 0; }

/* Focus */
:focus-visible {
  outline: 2px solid var(--accent-1);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Motion guard */
@media (prefers-reduced-motion: reduce) {
  *,*::before,*::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

/* ------------------------ Layout ------------------------ */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 var(--space-lg); }
.section { padding: var(--space-xxl) 0; }

.grid { display: grid; gap: var(--space-xl); }
.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }

@media (min-width: 768px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
}

/* Cards */
.card {
  background: var(--grad-card);
  border: 1px solid var(--bd-2);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  transition: transform var(--t), box-shadow var(--t);
  height: 100%;
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.card--row { flex-direction: row; align-items: center; justify-content: space-between; gap: var(--space-lg); flex-wrap: wrap; }

/* Lists */
.bullets { margin: 0 0 var(--space-lg); padding-left: var(--space-md); list-style: none; }
.bullets li { position: relative; margin-bottom: var(--space-sm); padding-left: var(--space-md); }
.bullets li::before {
  content: ""; position: absolute; left: 0; top: .72em;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-1);
}
.bullets--tight li { margin-bottom: var(--space-xs); }

/* ------------------------ Header / Navigation ------------------------ */
.nav {
  position: sticky; top: 0; z-index: var(--z-sticky);
  backdrop-filter: saturate(180%) blur(12px);
  background: rgba(0,0,0,.72);
  border-bottom: 1px solid var(--bd-2);
  transition: background var(--t);
}
@media (prefers-color-scheme: light) { .nav { background: rgba(255,255,255,.7); } }
.nav--scrolled { background: rgba(0,0,0,.9); }
@media (prefers-color-scheme: light) { .nav--scrolled { background: rgba(255,255,255,.95); } }

.nav__inner { display: flex; align-items: center; justify-content: space-between; padding: var(--space-md) 0; }

.brand { display: flex; align-items: center; gap: var(--space-sm); color: var(--fg-1); font-weight: var(--fw-bold); font-size: 1.25rem; }
.brand__mark {
  display: grid; place-items: center;
  width: 36px; height: 36px; border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  color: #001018; font-weight: var(--fw-bold);
  box-shadow: 0 0 0 1px rgba(255,255,255,.12), 0 8px 20px var(--accent-glow);
}

/* Mobile toggle */
.nav__toggle { display: none; width: 28px; height: 28px; background: none; border: 0; padding: 0; cursor: pointer; }
.nav__toggle span { display: block; height: 2px; width: 100%; background: var(--fg-1); margin: 3px 0; transition: transform var(--t), opacity var(--t); }
.nav__toggle[aria-expanded="true"] span:nth-child(1){ transform: rotate(45deg) translate(5px,6px); }
.nav__toggle[aria-expanded="true"] span:nth-child(2){ opacity: 0; }
.nav__toggle[aria-expanded="true"] span:nth-child(3){ transform: rotate(-45deg) translate(6px,-6px); }

.nav__links { display: flex; align-items: center; gap: var(--space-lg); }
.nav__links a {
  color: var(--fg-3); font-weight: var(--fw-medium);
  padding: var(--space-xs) var(--space-sm); border-radius: var(--radius-md);
  transition: color var(--t-fast), background-color var(--t-fast);
}
.nav__links a:hover, .nav__links a:focus { color: var(--fg-1); background: var(--bg-elev); }

@media (max-width: 768px) {
  .nav__toggle { display: flex; flex-direction: column; justify-content: center; }
  .nav__links {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch;
    background: var(--bg-card); border-top: 1px solid var(--bd-2);
    padding: var(--space-md); box-shadow: var(--shadow-lg);
    transform: translateY(-10px); opacity: 0; visibility: hidden;
    transition: transform var(--t), opacity var(--t), visibility var(--t);
  }
  .nav__links--visible { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav__links a { padding: var(--space-md); }
}

/* ------------------------ Hero ------------------------ */
.hero {
  position: relative; padding: var(--space-xxl) 0; min-height: 80vh;
  display: flex; align-items: center; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(800px 400px at 12% 88%, var(--accent-glow), transparent 60%);
  pointer-events: none;
}
/* slightly wider headline container so long single-line text fits */
.hero__wrap { position: relative; z-index: 1; display: flex; flex-direction: column; gap: var(--space-lg); max-width: min(96vw, 1100px); }

/* Single-line hero across 320–1440px (no clipping) */
.hero__h1 {
  font-size: clamp(2rem, 5.2vw, 4rem); /* tuned to fit one line at 1440 without overflow */
  line-height: 1.05; letter-spacing: -.02em;
  background: var(--grad-ink);
  background-size: 200% auto;
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: textShimmer 8s ease infinite;
  max-width: 100%;
}
.hero__h1[data-no-wrap]{
  white-space: nowrap;
  word-break: keep-all;
  overflow: visible;            /* ensure last word isn't cut */
  text-wrap: nowrap;
}
@supports (text-wrap: balance) {
  .hero__sub { text-wrap: balance; }
}
@keyframes textShimmer { 0%{background-position:0% 50%} 50%{background-position:100% 50%} 100%{background-position:0% 50%} }

.hero__sub { font-size: clamp(1.0625rem, 1.2vw + .8rem, 1.45rem); color: var(--fg-2); max-width: 64ch; line-height: 1.55; }
.hero__actions { display: flex; gap: var(--space-md); flex-wrap: wrap; margin-top: var(--space-lg); }

/* ------------------------ Compare ------------------------ */
.kicker { color: var(--fg-muted); font-weight: var(--fw-medium); margin-bottom: var(--space-sm); letter-spacing: .02em; text-transform: uppercase; }

.compare { align-items: stretch; }
.compare__item { display: flex; flex-direction: column; height: 100%; }
.compare__head { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--space-md); padding-bottom: var(--space-sm); border-bottom: 1px solid var(--bd-1); }
.compare__title { margin: 0; font-size: 1.25rem; }
.pill { display: inline-block; padding: var(--space-xxs) var(--space-sm); background: var(--bg-elev); color: var(--fg-3); border-radius: var(--radius-full); font-size: .75rem; font-weight: var(--fw-medium); text-transform: uppercase; letter-spacing: .02em; }

.compare__points { list-style: none; padding: 0; margin: 0; flex-grow: 1; }
.compare__points li { display: flex; flex-direction: column; margin-bottom: var(--space-md); }
.compare__points .label { font-size: .875rem; font-weight: var(--fw-medium); color: var(--fg-muted); margin-bottom: var(--space-xxs); }
.compare__points .val { color: var(--fg-1); }
.compare__points li.with { margin-top: auto; padding-top: var(--space-md); border-top: 1px solid var(--bd-1); }
.compare__points li.with .label { color: var(--accent-1); font-weight: var(--fw-semibold); }
.compare__footer { margin-top: var(--space-xl); padding-top: var(--space-lg); border-top: 1px solid var(--bd-2); }

/* ------------------------ Engines ------------------------ */
.engine { position: relative; overflow: hidden; }
.engine::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: linear-gradient(90deg, var(--accent-1), var(--accent-2)); opacity: 0; transition: opacity var(--t); }
.engine:hover::before { opacity: 1; }
.engine h3 { display: flex; align-items: center; gap: var(--space-sm); margin-bottom: var(--space-md); }

.engine__link {
  display: inline-flex; align-items: center; gap: var(--space-xs);
  margin-top: auto; padding-top: var(--space-md);
  color: var(--accent-1); font-weight: var(--fw-medium);
  transition: color var(--t-fast), gap var(--t-fast);
}
.engine__link:hover { color: var(--accent-2); gap: var(--space-sm); }

/* ------------------------ Findings ------------------------ */
/* Findings Layout */
#findings .findings__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

#findings .finding {
  background: var(--surface-2, #111820);
  border-radius: 1rem;
  padding: 1.25rem;
  box-shadow: 0 4px 14px rgba(0,0,0,0.25);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
#findings .finding:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.35);
}

/* Finding text */
#findings .finding h3 {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--accent, #4cc9f0);
}
#findings .finding p {
  margin-bottom: 0.75rem;
  line-height: 1.5;
  color: var(--muted, #aaa);
}

/* Images */
#findings .finding-visual img {
  width: 100%;
  height: auto;
  border-radius: 0.75rem;
  object-fit: cover;
  transition: transform 0.3s ease;
}
#findings .finding:hover .finding-visual img {
  transform: scale(1.02);
}

/* Captions */
#findings figcaption {
  font-size: 0.8rem;
  margin-top: 0.5rem;
  color: #888;
  font-style: italic;
}

/* Primary finding highlight */
#findings .finding.primary {
  grid-column: 1 / -1; /* span full width */
  background: linear-gradient(135deg, #1a1f2e, #111820);
  border: 1px solid rgba(255,255,255,0.05);
}

/* Controls */
#findings .btn-row {
  margin-top: 2rem;
  display: flex;
  gap: 1rem;
  justify-content: center;
}
#findings .btn {
  font-size: 0.9rem;
  padding: 0.6rem 1.2rem;
  border-radius: 9999px;
  transition: all 0.2s ease;
}
#findings .btn--white {
  background: #fff;
  color: #000;
}
#findings .btn--blue {
  background: #4cc9f0;
  color: #000;
}

/* ------------------------ Founder ------------------------ */
/* Works with or without a right-hand aside; overrides .card defaults cleanly */
.founder.card--row { display: grid; grid-template-columns: 1fr; gap: var(--space-xl); }
@media (min-width: 1024px) {
  .founder.card--row { grid-template-columns: minmax(420px, 640px) 1fr; align-items: start; }
}
.founder__bio { max-width: 64ch; }
.founder__avatar {
  width: 160px; height: 160px; border-radius: 24px;
  object-fit: cover; border: 1px solid var(--bd-1);
  box-shadow: var(--shadow-md);
}
.founder__meta { display: grid; gap: var(--space-sm); }
.badges { display: flex; gap: var(--space-sm); flex-wrap: wrap; }
.badge { padding: .35rem .6rem; border-radius: var(--radius-full); background: var(--bg-elev); color: var(--fg-3); font-size: .8rem; border: 1px solid var(--bd-1); }

/* ------------------------ FAQ ------------------------ */
details { margin-bottom: var(--space-md); }
details summary {
  cursor: pointer; padding: var(--space-md);
  background: var(--bg-card); border: 1px solid var(--bd-2);
  border-radius: var(--radius-md); list-style: none;
  font-weight: var(--fw-semibold);
  transition: background-color var(--t-fast), border-color var(--t-fast);
}
details summary:hover { background: var(--bg-elev); border-color: var(--bd-1); }
details summary::-webkit-details-marker { display: none; }
details summary::after { content: "+"; float: right; font-weight: var(--fw-bold); transition: transform var(--t); }
details[open] summary::after { content: "−"; }
details[open] summary { border-radius: var(--radius-md) var(--radius-md) 0 0; border-bottom: 1px solid var(--bd-2); }
details .card { border-radius: 0 0 var(--radius-md) var(--radius-md); border-top: 0; margin-top: -1px; box-shadow: none; }

/* Utilities for FAQ progressive reveal & a11y */
.hidden { display: none; }
.sr-only {
  position: absolute !important;
  width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ------------------------ Contact ------------------------ */
.contact__actions { display: flex; gap: var(--space-md); flex-wrap: wrap; }

/* ------------------------ Footer ------------------------ */
.footer {
  margin-top: auto; padding: var(--space-xl) 0;
  background: var(--bg-3);
  border-top: 1px solid var(--bd-2);
}
.footer__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-md); flex-wrap: wrap; }
.footer__links { display: flex; gap: var(--space-lg); flex-wrap: wrap; }
.footer__links a { color: var(--fg-3); transition: color var(--t-fast); }
.footer__links a:hover { color: var(--fg-1); }

.to-top {
  display: inline-grid; place-items: center;
  width: 40px; height: 40px; border-radius: var(--radius-md);
  background: var(--bg-elev); color: var(--fg-1);
  text-decoration: none; transition: background var(--t-fast), transform var(--t-fast);
}
.to-top:hover { background: var(--accent-1); color: #001018; transform: translateY(-2px); }

/* ------------------------ Buttons ------------------------ */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: var(--space-md) var(--space-lg);
  font: inherit; font-weight: var(--fw-medium);
  border: 1px solid transparent; border-radius: var(--radius-md);
  cursor: pointer; position: relative; overflow: hidden;
  transition: transform var(--t), box-shadow var(--t), background var(--t), color var(--t);
  min-height: 44px;
}
.btn::before {
  content: ""; position: absolute; inset: 0; left: -100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.22), transparent);
  transition: left var(--t-slow);
}
.btn:hover::before { left: 100%; }
.btn:focus-visible { outline: 2px solid var(--accent-1); outline-offset: 2px; }

/* Pill/Oval CTAs */
.btn--pill { border-radius: var(--radius-full) !important; padding: 0.75rem 1.25rem; font-weight: 600; }

.btn--primary {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  color: #001018; border-color: transparent;
  box-shadow: 0 8px 24px var(--accent-glow);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px var(--accent-glow); }

/* High-contrast “white” button (for dark hero) */
.btn--white{
  --bg: #f2f5f7;
  --fg: #0b1220;
  --bd: #d6dde3;
  background: var(--bg); color: var(--fg);
  border-color: var(--bd);
  box-shadow: 0 1px 0 rgba(255,255,255,.25) inset, 0 10px 28px rgba(0,0,0,.25);
  backdrop-filter: blur(8px);
}
.btn--white:hover{ background:#e8eef3; border-color:#c9d3db; transform:translateY(-2px); }
.btn--lg { padding: var(--space-lg) var(--space-xl); font-size: 1.125rem; }

/* ------------------------ Responsive ------------------------ */
@media (max-width: 900px) {
  .container { padding: 0 var(--space-md); }
  .section { padding: var(--space-xl) 0; }
  .founder.card--row { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .hero { min-height: 64vh; text-align: center; }
  .hero__wrap { align-items: center; text-align: center; max-width: 96vw; }
  .hero__actions { justify-content: center; }
  .footer__inner { flex-direction: column; align-items: center; text-align: center; }
  .footer__links { justify-content: center; }
}
@media (max-width: 480px) {
  .hero__actions, .contact__actions { flex-direction: column; width: 100%; }
  .hero__actions .btn, .contact__actions .btn { width: 100%; }
}

/* ------------------------ Print ------------------------ */
@media print {
  * { background: transparent !important; color: #000 !important; box-shadow: none !important; text-shadow: none !important; }
  .nav, .hero__actions, .footer, .to-top { display: none !important; }
  a { text-decoration: underline; }
  .card { border: 1px solid #000 !important; break-inside: avoid; }
}