/* =========================================================
   Bytewise — Main Stylesheet
   Brand: BLACK + #FF0505 + WHITE. Premium minimal.
   ========================================================= */

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; scroll-behavior: smooth; }
body { line-height: 1.5; font-family: var(--font-body); color: var(--ink); background: var(--white); overflow-x: hidden; }
img, picture, svg, video { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; background: none; border: none; color: inherit; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ---------- Design tokens ---------- */
:root {
  /* Color */
  --black: #0A0A0A;
  --ink: #1A1A1A;
  --grey-900: #2A2A2A;
  --grey-700: #4A4A4A;
  --grey-500: #6B6B6B;
  --grey-400: #8A8A8A;
  --grey-300: #B0B0B0;
  --grey-200: #D6D6D6;
  --grey-100: #E8E8E8;
  --grey-50: #F5F5F5;
  --grey-25: #FAFAFA;
  --white: #FFFFFF;
  --red: #FF0505;
  --red-dim: #D60404;
  --red-glow: rgba(255, 5, 5, 0.18);

  /* Typography */
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-display: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: "Instrument Serif", Georgia, serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Type scale */
  --fs-xxxl: clamp(3.5rem, 9vw, 8rem);   /* Hero display */
  --fs-xxl: clamp(2.5rem, 6vw, 5.5rem);  /* Section display */
  --fs-xl: clamp(2rem, 4vw, 3.5rem);     /* Page hero */
  --fs-lg: clamp(1.5rem, 2.6vw, 2.25rem);/* Section heading */
  --fs-md: clamp(1.25rem, 1.8vw, 1.5rem);/* Sub heading */
  --fs-base: 1rem;
  --fs-sm: 0.875rem;
  --fs-xs: 0.75rem;

  /* Spacing */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;
  --sp-7: 3rem;
  --sp-8: 4rem;
  --sp-9: 6rem;
  --sp-10: 8rem;
  --sp-11: 12rem;

  /* Layout */
  --container: 1280px;
  --container-narrow: 960px;
  --container-wide: 1440px;
  --gutter: 1.5rem;

  /* Effects */
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.10);
  --shadow-glow: 0 0 60px var(--red-glow);

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 200ms;
  --dur-base: 400ms;
  --dur-slow: 800ms;
}

/* ---------- Typography base ---------- */
body { font-size: var(--fs-base); color: var(--ink); letter-spacing: -0.01em; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-display); font-weight: 700; line-height: 1.05; letter-spacing: -0.03em; color: var(--black); }
p { line-height: 1.65; color: var(--grey-700); }
strong, b { font-weight: 600; color: var(--ink); }
em, i { font-style: italic; }

.font-serif { font-family: var(--font-serif); font-weight: 400; letter-spacing: -0.01em; }
.font-mono { font-family: var(--font-mono); font-size: 0.85em; letter-spacing: 0; }

/* Type utilities */
.display-xxl { font-size: var(--fs-xxxl); font-weight: 800; line-height: 0.95; letter-spacing: -0.045em; }
.display-xl { font-size: var(--fs-xxl); font-weight: 800; line-height: 1.0; letter-spacing: -0.04em; }
.display-lg { font-size: var(--fs-xl); font-weight: 800; line-height: 1.05; letter-spacing: -0.035em; }
.heading-lg { font-size: var(--fs-lg); font-weight: 700; line-height: 1.15; letter-spacing: -0.025em; }
.heading-md { font-size: var(--fs-md); font-weight: 600; line-height: 1.25; letter-spacing: -0.015em; }
.body-lg { font-size: 1.125rem; line-height: 1.6; color: var(--grey-700); }
.body { font-size: 1rem; line-height: 1.65; color: var(--grey-700); }
.body-sm { font-size: 0.9375rem; line-height: 1.55; color: var(--grey-700); }
.eyebrow { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; color: var(--black); }
.eyebrow-red { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; color: var(--red); }
.caption { font-size: 0.8125rem; color: var(--grey-500); letter-spacing: 0; }

/* Highlight */
.red { color: var(--red); }
.italic { font-style: italic; }

/* ---------- Layout primitives ---------- */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.container-narrow { width: 100%; max-width: var(--container-narrow); margin-inline: auto; padding-inline: var(--gutter); }
.container-wide { width: 100%; max-width: var(--container-wide); margin-inline: auto; padding-inline: var(--gutter); }

.section { padding-block: clamp(4rem, 9vw, 8rem); position: relative; }
.section-sm { padding-block: clamp(3rem, 6vw, 5rem); position: relative; }
.section-lg { padding-block: clamp(6rem, 12vw, 12rem); position: relative; }

.section-header { max-width: 880px; margin-bottom: var(--sp-8); }
.section-header .eyebrow,
.section-header .eyebrow-red { margin-bottom: var(--sp-4); display: inline-flex; align-items: center; gap: var(--sp-3); }
.section-header h2 { margin-bottom: var(--sp-5); }
.section-header p { font-size: 1.125rem; color: var(--grey-500); max-width: 720px; }

/* Eyebrow with red square */
.eyebrow-tag { display: inline-flex; align-items: center; gap: var(--sp-3); }
.eyebrow-tag::before { content: ""; display: inline-block; width: 12px; height: 12px; background: var(--red); }

/* Grid utilities */
.grid { display: grid; gap: var(--sp-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: var(--sp-4) 0;
  transition: background var(--dur-base) var(--ease), backdrop-filter var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom-color: var(--grey-100);
}
.nav-inner {
  max-width: var(--container-wide);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-6);
}
.nav-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.375rem;
  letter-spacing: -0.04em;
  color: var(--black);
  display: inline-flex; align-items: baseline;
}
.nav-brand .dot { color: var(--red); }
.nav-links {
  display: flex; align-items: center; gap: var(--sp-7);
}
.nav-link {
  font-size: 0.9375rem; font-weight: 500; color: var(--grey-700);
  transition: color var(--dur-fast) var(--ease);
  position: relative; padding: 0.25rem 0;
}
.nav-link:hover, .nav-link.active { color: var(--black); }
.nav-link.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -4px; height: 2px; background: var(--red);
}
.nav-cta {
  background: var(--black); color: var(--white);
  padding: 0.625rem 1.125rem;
  border-radius: 999px;
  font-size: 0.875rem; font-weight: 500;
  transition: background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.nav-cta:hover { background: var(--red); transform: translateY(-1px); }

.nav-toggle { display: none; }
.nav-mobile { display: none; }

@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-toggle {
    display: flex; flex-direction: column; justify-content: center; gap: 5px;
    width: 28px; height: 28px;
  }
  .nav-toggle span {
    display: block; width: 100%; height: 2px; background: var(--black);
    transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
  }
  .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2) { opacity: 0; }
  .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .nav-mobile {
    display: flex;
    position: fixed; inset: 0; background: var(--white);
    z-index: 99; padding: 80px var(--gutter) var(--sp-6);
    transform: translateX(100%); transition: transform var(--dur-base) var(--ease-in-out);
    overflow-y: auto;
    flex-direction: column;
  }
  .nav-mobile.open { transform: translateX(0); }
  .nav-mobile a {
    font-size: 2rem; font-weight: 700; padding: var(--sp-4) 0;
    border-bottom: 1px solid var(--grey-100); letter-spacing: -0.02em;
  }
  .nav-mobile a.active { color: var(--red); }
  .nav-mobile-footer { margin-top: auto; padding-top: var(--sp-6); display: flex; flex-direction: column; gap: var(--sp-4); }
  .nav-mobile-footer .nav-cta { width: 100%; text-align: center; font-size: 1rem; padding: 0.875rem; display: block; }
  .nav-mobile-footer .theme-toggle-mobile {
    width: 100%; padding: 0.875rem; display: flex; align-items: center; justify-content: center; gap: var(--sp-3);
    border: 1px solid var(--grey-200); border-radius: 999px;
    background: transparent; color: var(--ink);
    font-size: 0.9375rem; font-weight: 500; cursor: pointer;
  }
  .nav-mobile-footer .theme-toggle-mobile svg { width: 18px; height: 18px; }
  .nav-mobile-footer .theme-toggle-mobile .icon-sun { display: none; }
  html[data-theme="dark"] .nav-mobile-footer .theme-toggle-mobile { border-color: #2A2A2A; color: #F5F5F5; }
  html[data-theme="dark"] .nav-mobile-footer .theme-toggle-mobile .icon-moon { display: none; }
  html[data-theme="dark"] .nav-mobile-footer .theme-toggle-mobile .icon-sun { display: flex; }
  .nav-mobile-footer .theme-toggle-mobile .label-light { display: none; }
  html[data-theme="dark"] .nav-mobile-footer .theme-toggle-mobile .label-dark { display: none; }
  html[data-theme="dark"] .nav-mobile-footer .theme-toggle-mobile .label-light { display: inline; }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: var(--sp-3);
  font-size: 0.9375rem; font-weight: 500;
  padding: 0.875rem 1.5rem;
  border-radius: 999px;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
  white-space: nowrap;
  letter-spacing: -0.005em;
}
.btn-primary { background: var(--black); color: var(--white); }
.btn-primary:hover { background: var(--red); transform: translateY(-2px); }
.btn-red { background: var(--red); color: var(--white); }
.btn-red:hover { background: var(--black); transform: translateY(-2px); }
.btn-outline { border: 1px solid var(--black); color: var(--black); }
.btn-outline:hover { background: var(--black); color: var(--white); transform: translateY(-2px); }
.btn-ghost { color: var(--black); padding: 0.875rem 0; gap: var(--sp-2); }
.btn-ghost::after { content: "→"; transition: transform var(--dur-fast) var(--ease); }
.btn-ghost:hover { color: var(--red); }
.btn-ghost:hover::after { transform: translateX(4px); }
.btn-light { background: var(--white); color: var(--black); }
.btn-light:hover { background: var(--red); color: var(--white); transform: translateY(-2px); }

/* ---------- Cards ---------- */
.card {
  background: var(--white);
  border: 1px solid var(--grey-100);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  transition: border-color var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease), transform var(--dur-base) var(--ease);
}
.card:hover { border-color: var(--grey-200); box-shadow: var(--shadow); transform: translateY(-2px); }
.card-dark {
  background: var(--black); color: var(--grey-200);
  border: 1px solid var(--grey-900);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
}
.card-dark h3, .card-dark h4 { color: var(--white); }
.card-dark p { color: var(--grey-300); }

.card-num { font-family: var(--font-display); font-size: 2.5rem; font-weight: 800; color: var(--red); line-height: 1; margin-bottom: var(--sp-4); letter-spacing: -0.03em; }

/* ---------- Footer ---------- */
.footer {
  background: var(--black); color: var(--grey-300);
  padding: var(--sp-9) 0 var(--sp-6);
}
.footer-grid {
  display: grid; gap: var(--sp-6);
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  margin-bottom: var(--sp-8);
}
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer h4 {
  color: var(--white); font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.18em; text-transform: uppercase;
  margin-bottom: var(--sp-4);
}
.footer-links { display: flex; flex-direction: column; gap: var(--sp-3); }
.footer-links a {
  font-size: 0.9375rem; color: var(--grey-400);
  transition: color var(--dur-fast) var(--ease);
}
.footer-links a:hover { color: var(--white); }

.footer-brand {
  font-family: var(--font-display); font-size: 2rem; font-weight: 800;
  color: var(--white); letter-spacing: -0.04em; margin-bottom: var(--sp-4);
  display: inline-flex; align-items: baseline;
}
.footer-brand .dot { color: var(--red); }
.footer-tagline { color: var(--grey-400); margin-bottom: var(--sp-5); max-width: 280px; line-height: 1.55; }

.footer-bottom {
  border-top: 1px solid var(--grey-900);
  padding-top: var(--sp-5);
  display: flex; justify-content: space-between; align-items: center; gap: var(--sp-5);
  font-size: 0.8125rem; color: var(--grey-500); flex-wrap: wrap;
}

/* ---------- Sections — semantic helpers ---------- */
.bg-black { background: var(--black); color: var(--grey-200); }
.bg-black h1, .bg-black h2, .bg-black h3, .bg-black h4 { color: var(--white); }
.bg-black p { color: var(--grey-300); }
.bg-light { background: var(--grey-25); }
.bg-grey { background: var(--grey-50); }

/* ---------- Hairline ---------- */
.hr { height: 1px; background: var(--grey-100); border: none; margin: var(--sp-8) 0; }
.hr-dark { height: 1px; background: var(--grey-900); border: none; margin: var(--sp-8) 0; }

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  padding: 7rem var(--gutter) var(--sp-9);
  display: flex; flex-direction: column; justify-content: center;
  max-width: var(--container-wide); margin-inline: auto;
  position: relative;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: var(--sp-3);
  margin-bottom: var(--sp-6);
}
.hero-title {
  font-size: var(--fs-xxxl);
  font-weight: 800; line-height: 0.95; letter-spacing: -0.045em;
  color: var(--black);
  margin-bottom: var(--sp-5);
}
.hero-title .red { color: var(--red); }
.hero-title .italic { font-style: italic; }
.hero-sub {
  font-size: 1.25rem; color: var(--grey-500);
  max-width: 680px; line-height: 1.5;
  margin-bottom: var(--sp-7);
}
.hero-actions { display: flex; gap: var(--sp-4); flex-wrap: wrap; align-items: center; }

/* ---------- Marquee logo strip ---------- */
.marquee {
  overflow: hidden;
  padding: var(--sp-6) 0;
  border-top: 1px solid var(--grey-100);
  border-bottom: 1px solid var(--grey-100);
  position: relative;
}
.marquee-track {
  display: flex; gap: var(--sp-9);
  width: max-content;
  animation: scroll-x 40s linear infinite;
}
.marquee-item {
  font-family: var(--font-display); font-weight: 700; font-size: 1.25rem;
  color: var(--grey-300); letter-spacing: -0.02em;
  white-space: nowrap; flex-shrink: 0;
}
@keyframes scroll-x {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- Stats ---------- */
.stat { padding: var(--sp-5) 0; }
.stat-value {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800;
  line-height: 1; letter-spacing: -0.04em;
  color: var(--black);
  margin-bottom: var(--sp-2);
}
.stat-value .red { color: var(--red); }
.stat-label { font-size: 0.875rem; color: var(--grey-500); letter-spacing: 0; }

/* ---------- Forms ---------- */
.form-row { display: flex; flex-direction: column; gap: var(--sp-2); margin-bottom: var(--sp-5); }
.form-row label { font-size: 0.8125rem; font-weight: 600; color: var(--ink); letter-spacing: 0; }
.form-row input, .form-row select, .form-row textarea {
  width: 100%; padding: 0.875rem 1rem;
  background: var(--white); border: 1px solid var(--grey-200);
  border-radius: var(--radius);
  font: inherit; font-size: 0.9375rem; color: var(--ink);
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.form-row input:focus, .form-row select:focus, .form-row textarea:focus {
  outline: none; border-color: var(--black); box-shadow: 0 0 0 3px rgba(10,10,10,0.08);
}
.form-row textarea { min-height: 140px; resize: vertical; }

/* ---------- Accent helpers ---------- */
.red-mark { display: inline-block; width: 12px; height: 12px; background: var(--red); flex-shrink: 0; }
.red-dot { display: inline-block; width: 8px; height: 8px; background: var(--red); border-radius: 50%; flex-shrink: 0; }
.divider-red { height: 2px; width: 48px; background: var(--red); border: none; margin: var(--sp-4) 0; }

/* ---------- Tag pill ---------- */
.tag {
  display: inline-flex; align-items: center;
  padding: 4px 10px;
  background: var(--grey-50); border: 1px solid var(--grey-100);
  border-radius: 999px;
  font-size: 0.75rem; font-weight: 500; color: var(--grey-700);
  letter-spacing: 0;
}
.tag-red {
  background: var(--red); color: var(--white); border-color: var(--red);
}
.tag-outline {
  background: transparent; border: 1px solid var(--grey-300); color: var(--grey-700);
}

/* ---------- Accordion / details ---------- */
details {
  border-bottom: 1px solid var(--grey-100);
  padding: var(--sp-5) 0;
}
details summary {
  cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: var(--sp-4);
  font-size: 1.125rem; font-weight: 600; color: var(--black);
  letter-spacing: -0.01em;
}
details summary::-webkit-details-marker { display: none; }
details summary::after {
  content: "+"; font-size: 1.5rem; font-weight: 400;
  transition: transform var(--dur-base) var(--ease);
}
details[open] summary::after { transform: rotate(45deg); }
details > div, details > p { margin-top: var(--sp-4); color: var(--grey-700); line-height: 1.65; }

/* ---------- Persona card (problems-we-solve) ---------- */
.persona-card {
  background: var(--white);
  border: 1px solid var(--grey-100);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  transition: border-color var(--dur-base) var(--ease), transform var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease);
  position: relative; overflow: hidden;
}
.persona-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--black); transition: background var(--dur-base) var(--ease);
}
.persona-card:hover { border-color: var(--grey-200); transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.persona-card:hover::before { background: var(--red); }
.persona-card.featured::before { background: var(--red); }
.persona-card h3 { font-size: 1.25rem; margin-bottom: var(--sp-4); letter-spacing: -0.02em; }
.persona-card ul { display: flex; flex-direction: column; gap: var(--sp-3); }
.persona-card li {
  font-size: 0.9375rem; color: var(--ink); line-height: 1.45;
  font-style: italic; padding-left: var(--sp-4); position: relative;
}
.persona-card li::before {
  content: "•"; color: var(--red); font-weight: 900;
  position: absolute; left: 0; top: -2px; font-size: 1.25rem; line-height: 1;
}

/* ---------- Practice card ---------- */
.practice-card {
  background: var(--white);
  border: 1px solid var(--grey-100);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  transition: border-color var(--dur-base) var(--ease), transform var(--dur-base) var(--ease);
  display: flex; flex-direction: column; gap: var(--sp-4);
}
.practice-card:hover { border-color: var(--red); transform: translateY(-4px); }
.practice-num {
  font-family: var(--font-display); font-size: 0.875rem; font-weight: 600;
  color: var(--red); letter-spacing: 0.1em;
}
.practice-card h3 { font-size: 1.25rem; letter-spacing: -0.02em; }
.practice-card .body-sm { flex: 1; }

/* ---------- Cofounder card ---------- */
.founder-card {
  background: var(--black); color: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--sp-7);
  position: relative; overflow: hidden;
  display: flex; flex-direction: column; gap: var(--sp-3);
  transition: transform var(--dur-base) var(--ease);
}
.founder-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px; background: var(--red);
}
.founder-card:hover { transform: translateY(-4px); }
.founder-card .name {
  font-family: var(--font-display); font-size: 1.5rem; font-weight: 700;
  letter-spacing: -0.025em; color: var(--white);
}
.founder-card .title {
  font-size: 0.8125rem; font-weight: 600; color: var(--red);
  letter-spacing: 0.15em; text-transform: uppercase;
}
.founder-card .loc {
  font-size: 0.875rem; color: var(--grey-400);
  display: inline-flex; align-items: center; gap: var(--sp-2);
}
.founder-card .loc::before {
  content: ""; width: 6px; height: 6px; background: var(--red); border-radius: 50%; display: inline-block;
}
.founder-card hr {
  width: 40px; height: 2px; background: var(--red); border: none; margin: var(--sp-3) 0;
}
.founder-card .bio { color: var(--grey-300); line-height: 1.6; font-size: 0.9375rem; }

/* ---------- Quote (manifesto) ---------- */
.quote-card {
  background: var(--grey-25);
  border: 1px solid var(--grey-100);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  position: relative;
}
.quote-card::before {
  content: "“"; position: absolute; top: 0.5rem; left: 1rem;
  font-family: var(--font-serif); font-size: 4rem; line-height: 1;
  color: var(--red);
}
.quote-card p {
  font-family: var(--font-display); font-size: 1.25rem; font-weight: 700;
  color: var(--black); line-height: 1.3; letter-spacing: -0.02em;
  padding-top: var(--sp-5);
}

/* ---------- Phase chip (methodology) ---------- */
.phases { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--sp-4); }
@media (max-width: 900px) { .phases { grid-template-columns: 1fr; } }
.phase {
  background: var(--white);
  border: 1px solid var(--grey-100);
  border-radius: var(--radius-lg);
  padding: var(--sp-7) var(--sp-5) var(--sp-5);
  text-align: center;
  position: relative;
}
.phase-num {
  position: absolute; top: -22px; left: 50%; transform: translateX(-50%);
  width: 44px; height: 44px; background: var(--red); color: var(--white);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-weight: 700; font-size: 1.125rem;
}
.phase h4 { font-size: 1.25rem; margin-bottom: var(--sp-2); }
.phase .dur { font-size: 0.75rem; font-weight: 600; color: var(--red); letter-spacing: 0.15em; text-transform: uppercase; margin-bottom: var(--sp-3); }
.phase p { font-size: 0.875rem; color: var(--grey-700); line-height: 1.5; }

/* ---------- Service depth list ---------- */
.depth-list { display: flex; flex-direction: column; }
.depth-item {
  display: grid; grid-template-columns: 80px 1fr auto; gap: var(--sp-5);
  padding: var(--sp-5) 0;
  border-bottom: 1px solid var(--grey-100);
  align-items: center; transition: background var(--dur-base) var(--ease);
}
.depth-item:hover { background: var(--grey-25); padding-inline: var(--sp-4); margin-inline: calc(var(--sp-4) * -1); border-radius: var(--radius); }
.depth-item .n { font-family: var(--font-display); font-weight: 700; color: var(--red); }
.depth-item .t { font-weight: 600; color: var(--black); font-size: 1.0625rem; }
.depth-item .t span { display: block; color: var(--grey-500); font-weight: 400; font-size: 0.875rem; margin-top: 4px; line-height: 1.45; }
.depth-item .meta { font-size: 0.8125rem; color: var(--grey-500); white-space: nowrap; }
@media (max-width: 700px) {
  .depth-item { grid-template-columns: 60px 1fr; }
  .depth-item .meta { display: none; }
}

/* ---------- CTA strip ---------- */
.cta-strip {
  padding: var(--sp-10) 0;
  background: var(--black); color: var(--white);
  text-align: center;
}
.cta-strip h2 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 800; line-height: 1.0; letter-spacing: -0.04em;
  color: var(--white); margin-bottom: var(--sp-5);
}
.cta-strip h2 .red { color: var(--red); font-style: italic; }
.cta-strip p { color: var(--grey-400); font-size: 1.125rem; max-width: 600px; margin-inline: auto; margin-bottom: var(--sp-6); }

/* ---------- Two-column inline ---------- */
.two-col {
  display: grid; grid-template-columns: 1fr 1.4fr; gap: var(--sp-9);
  align-items: start;
}
@media (max-width: 900px) {
  .two-col { grid-template-columns: 1fr; gap: var(--sp-7); }
}

/* ---------- Belief grid (philosophy) ---------- */
.beliefs { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); }
@media (max-width: 900px) { .beliefs { grid-template-columns: 1fr; } }
.belief {
  background: var(--grey-900); color: var(--white);
  border: 1px solid var(--grey-700);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  position: relative;
  transition: border-color var(--dur-base) var(--ease), transform var(--dur-base) var(--ease);
}
.belief:hover { border-color: var(--red); transform: translateY(-4px); }
.belief::before {
  content: "“"; position: absolute; top: 0.5rem; left: 1rem;
  font-family: var(--font-serif); font-size: 3.5rem; line-height: 1; color: var(--red);
}
.belief p {
  font-family: var(--font-display); font-size: 1.125rem; font-weight: 700;
  color: var(--white); line-height: 1.3; letter-spacing: -0.015em;
  padding-top: var(--sp-5);
}

/* ---------- Inline icon row ---------- */
.icon-row { display: flex; gap: var(--sp-5); flex-wrap: wrap; align-items: center; }
.icon-row .item {
  display: inline-flex; align-items: center; gap: var(--sp-3);
  font-size: 0.875rem; font-weight: 500; color: var(--ink);
}
.icon-row .item::before { content: "✓"; color: var(--red); font-weight: 700; }

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
  padding: 9rem 0 var(--sp-9);
  background: var(--white);
  border-bottom: 1px solid var(--grey-100);
}
.page-hero .eyebrow-tag { margin-bottom: var(--sp-4); }
.page-hero h1 {
  font-size: var(--fs-xxl); font-weight: 800;
  line-height: 1.0; letter-spacing: -0.04em;
  max-width: 14ch; margin-bottom: var(--sp-5);
}
.page-hero h1 .red { color: var(--red); font-style: italic; }
.page-hero p { font-size: 1.25rem; max-width: 720px; color: var(--grey-500); line-height: 1.45; }

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.mx-auto { margin-inline: auto; }
.mb-2 { margin-bottom: var(--sp-2); }
.mb-3 { margin-bottom: var(--sp-3); }
.mb-4 { margin-bottom: var(--sp-4); }
.mb-5 { margin-bottom: var(--sp-5); }
.mb-6 { margin-bottom: var(--sp-6); }
.mb-7 { margin-bottom: var(--sp-7); }
.mt-3 { margin-top: var(--sp-3); }
.mt-4 { margin-top: var(--sp-4); }
.mt-5 { margin-top: var(--sp-5); }
.mt-6 { margin-top: var(--sp-6); }
.mt-7 { margin-top: var(--sp-7); }
.mt-8 { margin-top: var(--sp-8); }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }
.gap-5 { gap: var(--sp-5); }
.gap-6 { gap: var(--sp-6); }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }

/* ---------- Print friendly ---------- */
@media print {
  .nav, .footer, .cta-strip { display: none; }
  body { color: black; background: white; }
}

/* =========================================================
   SOCIAL ICONS
   ========================================================= */
.socials {
  display: inline-flex; gap: var(--sp-3); flex-wrap: wrap;
  margin-top: var(--sp-4);
}
.social-link {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--grey-200);
  color: var(--grey-700);
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.social-link svg { width: 16px; height: 16px; }
.social-link:hover {
  color: var(--white); background: var(--red); border-color: var(--red);
  transform: translateY(-2px);
}
.footer .social-link {
  border-color: var(--grey-900);
  color: var(--grey-400);
}
.footer .social-link:hover {
  color: var(--white); background: var(--red); border-color: var(--red);
}
html[data-theme="dark"] .social-link { border-color: #2A2A2A; color: #B5B5B5; }
html[data-theme="dark"] .social-link:hover { color: #FFFFFF; background: #FF0505; border-color: #FF0505; }

/* =========================================================
   COMMUNITY / FELLOWSHIPS
   ========================================================= */
.community-grid {
  display: grid; gap: var(--sp-4);
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}
.community-badge {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  background: var(--white);
  border: 1px solid var(--grey-100);
  border-radius: var(--radius-lg);
  padding: var(--sp-5) var(--sp-4);
  text-align: center;
  transition: border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
  min-height: 110px;
  gap: var(--sp-2);
}
.community-badge:hover { border-color: var(--red); transform: translateY(-2px); }
.community-badge .name {
  font-family: var(--font-display); font-size: 0.875rem; font-weight: 700;
  color: var(--black); letter-spacing: -0.01em;
}
.community-badge .label {
  font-size: 0.6875rem; color: var(--grey-500); letter-spacing: 0.05em; text-transform: uppercase;
}
html[data-theme="dark"] .community-badge { background: #1A1A1A; border-color: #2A2A2A; }
html[data-theme="dark"] .community-badge .name { color: #F5F5F5; }

.fellowship-card {
  background: var(--white);
  border: 1px solid var(--grey-100);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  position: relative;
  display: flex; flex-direction: column; gap: var(--sp-3);
  transition: border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.fellowship-card:hover { border-color: var(--red); transform: translateY(-2px); }
.fellowship-card .pill {
  align-self: flex-start;
  font-size: 0.6875rem; font-weight: 600;
  padding: 4px 10px; border-radius: 999px;
  background: var(--grey-50); color: var(--grey-700);
  letter-spacing: 0.05em; text-transform: uppercase;
}
.fellowship-card .pill.red { background: var(--red); color: var(--white); }
.fellowship-card h4 { font-size: 1.0625rem; color: var(--black); letter-spacing: -0.02em; }
html[data-theme="dark"] .fellowship-card { background: #1A1A1A; border-color: #2A2A2A; }
html[data-theme="dark"] .fellowship-card h4 { color: #F5F5F5; }
html[data-theme="dark"] .fellowship-card .pill { background: #2A2A2A; color: #C2C2C2; }

/* =========================================================
   DARK MODE
   Activated by [data-theme="dark"] on <html>.
   Override the existing color tokens; constants stay.
   ========================================================= */

:root {
  /* Smooth theme transitions */
  --theme-transition: background-color 300ms ease, color 300ms ease, border-color 300ms ease;
}

html[data-theme="dark"] {
  --black: #F2F2F2;
  --ink: #E8E8E8;
  --grey-900: #DDDDDD;
  --grey-700: #C2C2C2;
  --grey-500: #888888;
  --grey-400: #6F6F6F;
  --grey-300: #4A4A4A;
  --grey-200: #2A2A2A;
  --grey-100: #1F1F1F;
  --grey-50:  #1A1A1A;
  --grey-25:  #141414;
  --white:    #0E0E0E;
  --hair:     #2A2A2A;
}

html[data-theme="dark"] body {
  background: #0E0E0E;
  color: var(--ink);
}

html[data-theme="dark"] .nav.scrolled {
  background: rgba(14, 14, 14, 0.85);
  border-bottom-color: #2A2A2A;
}

html[data-theme="dark"] .nav-brand,
html[data-theme="dark"] .nav-link:hover,
html[data-theme="dark"] .nav-link.active { color: #F5F5F5; }

html[data-theme="dark"] .nav-cta { background: #F5F5F5; color: #0A0A0A; }
html[data-theme="dark"] .nav-cta:hover { background: #FF0505; color: #FFFFFF; }

html[data-theme="dark"] .nav-toggle span { background: #F5F5F5; }
html[data-theme="dark"] .nav-mobile { background: #0E0E0E; }
html[data-theme="dark"] .nav-mobile a { color: #F5F5F5; border-color: #2A2A2A; }

/* Buttons — fixed contrast in dark mode */
html[data-theme="dark"] .btn-primary { background: #F5F5F5; color: #0A0A0A; }
html[data-theme="dark"] .btn-primary:hover { background: #FF0505; color: #FFFFFF; }
html[data-theme="dark"] .btn-outline { border-color: #F5F5F5; color: #F5F5F5; }
html[data-theme="dark"] .btn-outline:hover { background: #F5F5F5; color: #0A0A0A; }
html[data-theme="dark"] .btn-ghost { color: #F5F5F5; }
html[data-theme="dark"] .btn-ghost:hover { color: #FF0505; }
/* btn-light is meant for dark surfaces (CTA strip, footer) — keep it readable in both themes */
html[data-theme="dark"] .btn-light { background: #FFFFFF; color: #0A0A0A; }
html[data-theme="dark"] .btn-light:hover { background: #FF0505; color: #FFFFFF; }
/* btn-red text stays white in dark */
html[data-theme="dark"] .btn-red { background: #FF0505; color: #FFFFFF; }
html[data-theme="dark"] .btn-red:hover { background: #FFFFFF; color: #0A0A0A; }

/* Hero / typography */
html[data-theme="dark"] .hero-title,
html[data-theme="dark"] .display-xxl,
html[data-theme="dark"] .display-xl,
html[data-theme="dark"] .display-lg,
html[data-theme="dark"] .heading-lg,
html[data-theme="dark"] .heading-md { color: #F5F5F5; }
html[data-theme="dark"] p { color: #B5B5B5; }
html[data-theme="dark"] .body-lg, html[data-theme="dark"] .body { color: #B5B5B5; }
html[data-theme="dark"] strong { color: #F5F5F5; }

/* Eyebrow */
html[data-theme="dark"] .eyebrow { color: #F5F5F5; }

/* Backgrounds */
html[data-theme="dark"] .bg-light { background: #141414; }
html[data-theme="dark"] .bg-grey  { background: #1A1A1A; }
html[data-theme="dark"] .bg-black { background: #000000; }
html[data-theme="dark"] section.bg-black h2,
html[data-theme="dark"] section.bg-black h3,
html[data-theme="dark"] section.bg-black h4 { color: #FFFFFF; }

/* Page hero (inner pages) */
html[data-theme="dark"] .page-hero {
  background: #0E0E0E;
  border-bottom-color: #2A2A2A;
}
html[data-theme="dark"] .page-hero h1 { color: #F5F5F5; }
html[data-theme="dark"] .page-hero p { color: #B5B5B5; }
html[data-theme="dark"] .bg-num { color: #1F1F1F; }

/* Cards */
html[data-theme="dark"] .card {
  background: #1A1A1A; border-color: #2A2A2A;
}
html[data-theme="dark"] .card:hover { border-color: #3A3A3A; }
html[data-theme="dark"] .card h3, html[data-theme="dark"] .card h4 { color: #F5F5F5; }

html[data-theme="dark"] .card-dark { background: #050505; border-color: #1A1A1A; }
html[data-theme="dark"] .persona-card { background: #1A1A1A; border-color: #2A2A2A; }
html[data-theme="dark"] .persona-card h3 { color: #F5F5F5; }
html[data-theme="dark"] .persona-card li { color: #DDDDDD; }
html[data-theme="dark"] .practice-card { background: #1A1A1A; border-color: #2A2A2A; }
html[data-theme="dark"] .practice-card h3 { color: #F5F5F5; }
html[data-theme="dark"] .practice-card:hover { border-color: #FF0505; }

/* Phase */
html[data-theme="dark"] .phase { background: #1A1A1A; border-color: #2A2A2A; }
html[data-theme="dark"] .phase h4 { color: #F5F5F5; }

/* Belief */
html[data-theme="dark"] .belief { background: #050505; border-color: #1F1F1F; }
html[data-theme="dark"] .belief p { color: #FFFFFF; }

/* Quote */
html[data-theme="dark"] .quote-card { background: #141414; border-color: #2A2A2A; }
html[data-theme="dark"] .quote-card p { color: #F5F5F5; }

/* Founder cards */
html[data-theme="dark"] .founder-card { background: #050505; }

/* Marquee */
html[data-theme="dark"] .marquee {
  background: #0E0E0E;
  border-color: #2A2A2A;
}
html[data-theme="dark"] .marquee-item { color: #5A5A5A; }

/* Depth list */
html[data-theme="dark"] .depth-item { border-color: #2A2A2A; }
html[data-theme="dark"] .depth-item:hover { background: #141414; }
html[data-theme="dark"] .depth-item .t { color: #F5F5F5; }
html[data-theme="dark"] .depth-item .t span { color: #888888; }

/* Forms */
html[data-theme="dark"] .form-row label { color: #F5F5F5; }
html[data-theme="dark"] .form-row input,
html[data-theme="dark"] .form-row select,
html[data-theme="dark"] .form-row textarea {
  background: #141414; border-color: #2A2A2A; color: #F5F5F5;
}
html[data-theme="dark"] .form-row input:focus,
html[data-theme="dark"] .form-row select:focus,
html[data-theme="dark"] .form-row textarea:focus {
  border-color: #F5F5F5; box-shadow: 0 0 0 3px rgba(245,245,245,0.08);
}

/* Tag */
html[data-theme="dark"] .tag { background: #1F1F1F; border-color: #2A2A2A; color: #C2C2C2; }
html[data-theme="dark"] .tag-outline { border-color: #3A3A3A; color: #C2C2C2; }

/* Details / accordion */
html[data-theme="dark"] details { border-color: #2A2A2A; }
html[data-theme="dark"] details summary { color: #F5F5F5; }

/* Hr */
html[data-theme="dark"] .hr { background: #2A2A2A; }

/* Hero bg subtle gradient adjust */
html[data-theme="dark"] .hero-bg {
  background:
    radial-gradient(800px 600px at 90% 30%, rgba(255, 5, 5, 0.06) 0%, transparent 60%),
    radial-gradient(600px 400px at 10% 80%, rgba(255, 255, 255, 0.02) 0%, transparent 60%);
}

/* Footer (always dark, but tweak in dark mode) */
html[data-theme="dark"] .footer { background: #000000; }

/* Theme transitions */
body, .nav, .card, .practice-card, .persona-card, .belief, .founder-card,
.bg-light, .bg-grey, .bg-black, .page-hero, .marquee, .phase, .form-row input,
.form-row select, .form-row textarea {
  transition: var(--theme-transition);
}

/* =========================================================
   THEME TOGGLE BUTTON
   ========================================================= */

.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid var(--grey-200);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
  flex-shrink: 0;
}
.theme-toggle:hover {
  border-color: var(--red);
  color: var(--red);
}
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
html[data-theme="dark"] .theme-toggle { border-color: #2A2A2A; color: #F5F5F5; }
html[data-theme="dark"] .theme-toggle .icon-moon { display: none; }
html[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
html[data-theme="dark"] .theme-toggle:hover { border-color: #FF0505; color: #FF0505; }

/* =========================================================
   LOGO MARQUEE (real platform logos via Simple Icons CDN)
   ========================================================= */

.logo-marquee {
  overflow: hidden;
  padding: var(--sp-6) 0;
  border-top: 1px solid var(--grey-100);
  border-bottom: 1px solid var(--grey-100);
  position: relative;
}
.logo-marquee::before, .logo-marquee::after {
  content: ""; position: absolute; top: 0; bottom: 0; width: 120px; z-index: 1; pointer-events: none;
}
.logo-marquee::before { left: 0; background: linear-gradient(to right, var(--white), transparent); }
.logo-marquee::after  { right: 0; background: linear-gradient(to left,  var(--white), transparent); }

html[data-theme="dark"] .logo-marquee::before { background: linear-gradient(to right, #0E0E0E, transparent); }
html[data-theme="dark"] .logo-marquee::after  { background: linear-gradient(to left,  #0E0E0E, transparent); }
html[data-theme="dark"] .logo-marquee { border-color: #2A2A2A; }

.logo-track {
  display: flex; gap: var(--sp-8);
  width: max-content;
  align-items: center;
  animation: scroll-x 50s linear infinite;
}
.logo-item {
  display: inline-flex; align-items: center; justify-content: center;
  height: 40px; flex-shrink: 0;
  opacity: 0.55;
  transition: opacity var(--dur-fast) var(--ease);
}
.logo-item:hover { opacity: 1; }
.logo-item img {
  height: 32px; width: auto; max-width: 140px;
  object-fit: contain;
}
.logo-item .logo-text {
  font-family: var(--font-display); font-weight: 700; font-size: 1.125rem;
  color: var(--grey-500); letter-spacing: -0.02em; white-space: nowrap;
}

/* In dark mode, logos load colored white so we don't need to filter */
html[data-theme="dark"] .logo-item .logo-text { color: #6A6A6A; }

/* =========================================================
   REFERENCE ARCHITECTURE DIAGRAMS
   ========================================================= */

.diagram-wrap {
  background: var(--grey-25);
  border: 1px solid var(--grey-100);
  border-radius: var(--radius-lg);
  padding: var(--sp-7);
  position: relative; overflow: hidden;
}
html[data-theme="dark"] .diagram-wrap { background: #141414; border-color: #2A2A2A; }

.diagram-svg {
  width: 100%; height: auto; max-height: 480px;
  display: block;
}
.diagram-caption {
  margin-top: var(--sp-4);
  font-size: 0.8125rem; color: var(--grey-500); text-align: center;
  font-style: italic; letter-spacing: 0;
}

/* Diagram color tokens (used in inline SVGs via currentColor / CSS vars) */
.diagram-svg .node-bg { fill: var(--white); stroke: var(--grey-200); }
.diagram-svg .node-text { fill: var(--ink); font-family: var(--font-display); font-weight: 600; }
.diagram-svg .node-label { fill: var(--grey-500); font-family: var(--font-display); }
.diagram-svg .node-accent { fill: var(--red); }
.diagram-svg .arrow { stroke: var(--grey-400); fill: none; }
.diagram-svg .arrow-accent { stroke: var(--red); fill: none; }

html[data-theme="dark"] .diagram-svg .node-bg { fill: #1A1A1A; stroke: #2A2A2A; }
html[data-theme="dark"] .diagram-svg .node-text { fill: #F5F5F5; }
html[data-theme="dark"] .diagram-svg .node-label { fill: #888888; }
html[data-theme="dark"] .diagram-svg .arrow { stroke: #555555; }