:root {
  --primary: #2563eb;
  --dark: #0f172a;
  --light: #f8fafc;
  --amber: #f59e0b;
  --muted: #475569;
  --border: #e2e8f0;
  --shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
      --font-primary: "Inter", sans-serif;
      --font-secondary: "Inter", sans-serif;
  --bg: var(--light);
  --text: var(--dark);
  --surface: #ffffff;
  --surface-muted: #eef2ff;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-primary);
  color: var(--text);
  background: radial-gradient(1200px 600px at 10% -10%, #e0ecff 0%, transparent 55%),
              radial-gradient(800px 500px at 100% 0%, #fff1d6 0%, transparent 55%),
              var(--bg);
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -40px;
  padding: 8px 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  z-index: 999;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.12);
  color: var(--primary);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  font-weight: 600;
}

header {
  padding: 48px 0 120px;
  position: relative;
  overflow: hidden;
}

.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.32;
  filter: saturate(1.05) blur(0.5px);
  z-index: 0;
}

header::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(248, 250, 252, 0.92) 0%, rgba(248, 250, 252, 0.7) 55%, rgba(248, 250, 252, 0.96) 100%);
  z-index: 1;
}

header > * {
  position: relative;
  z-index: 2;
}

.home-page .hero-video {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100vh;
  object-fit: cover;
  z-index: 0;
  pointer-events: none;
  opacity: 0.2;
  filter: saturate(1.02) blur(1.5px);
}

.home-page::before {
  content: "";
  position: fixed;
  inset: 0;
  background: linear-gradient(180deg, rgba(248, 250, 252, 0.8) 0%, rgba(248, 250, 252, 0.74) 55%, rgba(248, 250, 252, 0.9) 100%);
  z-index: 1;
  pointer-events: none;
}

.home-page header::after {
  display: none;
}

.download-page .hero-video {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100vh;
  object-fit: cover;
  z-index: 0;
  pointer-events: none;
  opacity: 0.2;
  filter: saturate(1.02) blur(1.5px);
}

.download-page::before {
  content: "";
  position: fixed;
  inset: 0;
  background: linear-gradient(180deg, rgba(248, 250, 252, 0.8) 0%, rgba(248, 250, 252, 0.74) 55%, rgba(248, 250, 252, 0.9) 100%);
  z-index: 1;
  pointer-events: none;
}

.download-page header::after {
  display: none;
}

.download-page main,
.download-page section,
.download-page .footer {
  position: relative;
  z-index: 2;
}

.home-page main,
.home-page section,
.home-page .footer {
  position: relative;
  z-index: 2;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 48px;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.4px;
}

.logo img { width: 34px; height: 34px; object-fit: contain; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 14px;
  color: var(--muted);
}

.nav-links a:hover { color: var(--text); }

.nav-links a[aria-current="page"],
.nav-links a.active {
  color: var(--text);
  font-weight: 600;
  position: relative;
}

.nav-links a[aria-current="page"]::after,
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  background: var(--primary);
  border-radius: 999px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  border: 1px solid rgba(15, 23, 42, 0.15);
  background: white;
  color: var(--text);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
}

.dropdown {
  position: relative;
}

.dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  min-width: 220px;
  box-shadow: var(--shadow);
  padding: 10px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 10;
}

.dropdown-menu::before {
  content: "";
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
}

.dropdown-menu a {
  display: block;
  padding: 10px 12px;
  border-radius: 10px;
  color: var(--text);
}

.dropdown-menu a:hover {
  background: var(--surface-muted);
}

.dropdown:hover .dropdown-menu,
.dropdown:focus-within .dropdown-menu,
.dropdown-menu:hover {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: 0 16px 36px rgba(37, 99, 235, 0.25);
}

.btn-secondary {
  border-color: rgba(15, 23, 42, 0.2);
  background: white;
  color: var(--text);
}

.btn:hover { transform: translateY(-2px); }

.theme-toggle {
  position: relative;
  width: 44px;
  height: 28px;
  border-radius: 999px;
  border: 1px solid rgba(15, 23, 42, 0.15);
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(6px);
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px;
  cursor: pointer;
  overflow: hidden;
}

.theme-toggle .icon {
  width: 16px;
  height: 16px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  font-size: 12px;
  line-height: 1;
  color: var(--text);
  opacity: 0.6;
}

.theme-toggle .knob {
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.85);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
  left: 4px;
  transition: transform 0.2s ease;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(15, 23, 42, 0.15);
  background: white;
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
}

.flag {
  width: 18px;
  height: 12px;
  border-radius: 2px;
  overflow: hidden;
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.1);
  background-size: cover;
  background-position: center;
}

.flag-uk {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 30'%3E%3Crect width='60' height='30' fill='%23012169'/%3E%3Cpath d='M0 0 L60 30 M60 0 L0 30' stroke='%23ffffff' stroke-width='6'/%3E%3Cpath d='M0 0 L60 30 M60 0 L0 30' stroke='%23C8102E' stroke-width='3'/%3E%3Cpath d='M30 0 V30 M0 15 H60' stroke='%23ffffff' stroke-width='10'/%3E%3Cpath d='M30 0 V30 M0 15 H60' stroke='%23C8102E' stroke-width='6'/%3E%3C/svg%3E");
  background-size: cover;
  background-position: center;
}

.flag-fr {
  background: linear-gradient(90deg, #1d4ed8 0 33%, #ffffff 33% 66%, #ef4444 66% 100%);
}

.hero {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1.05;
  letter-spacing: -1px;
  margin: 16px 0 20px;
}

.hero p { font-size: 17px; color: var(--muted); max-width: 520px; }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 26px; }

.mono { font-family: var(--font-secondary); font-size: 12px; color: var(--muted); }

section { padding: 20px 0; }

.methodology-page section {
  padding: 20px 0;
}

.methodology-page .section-title {
  margin-bottom: 12px;
}

.methodology-page .card {
  padding: 18px;
}

.methodology-page .grid-3 {
  gap: 16px;
}

.home-page section {
  padding: 70px 0;
}

.home-page header {
  padding-bottom: 90px;
}

.section-title {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.section-title h2 { font-size: clamp(28px, 3vw, 40px); }
.section-title p { color: var(--muted); max-width: 520px; }

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.card {
  background: var(--surface);
  border-radius: 22px;
  padding: 24px;
  border: 1px solid var(--border);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
}

.card h3 { margin: 12px 0 8px; font-size: 18px; }

.icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.methodology-page .card img {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--border);
  margin-bottom: 12px;
}

.methodology-page details.card summary {
  list-style: none;
}

.methodology-page details.card summary::marker {
  content: "";
}

.methodology-page details.card summary::after {
  content: "▼";
  float: right;
  color: var(--muted);
  font-size: 12px;
  margin-top: 2px;
}

.methodology-page details[open] summary::after {
  content: "▲";
}

.showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}

.shot {
  background: var(--surface);
  border-radius: 22px;
  padding: 18px;
  border: 1px solid var(--border);
  min-height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  box-shadow: 0 14px 36px rgba(15, 23, 42, 0.08);
}

.shot img {
  width: min(100%, 320px);
  height: 200px;
  object-fit: contain;
  border-radius: 14px;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  padding: 12px;
}

.cta {
  background: linear-gradient(135deg, #1d4ed8, #2563eb);
  color: white;
  border-radius: 28px;
  padding: 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  align-items: center;
}

.cta input {
  width: 100%;
  padding: 12px 16px;
  border-radius: 999px;
  border: none;
  margin-bottom: 10px;
  font-size: 14px;
}

.cta button {
  width: 100%;
  padding: 12px 16px;
  border-radius: 999px;
  border: none;
  background: var(--amber);
  color: #1f1300;
  font-weight: 600;
}

.footer {
  padding: 40px 0 60px;
  color: var(--muted);
  font-size: 14px;
}

.body-copy {
  background: var(--surface);
  border-radius: 24px;
  padding: 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.placeholder-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.placeholder-block {
  background: var(--surface);
  border-radius: 20px;
  padding: 20px;
  border: 1px dashed var(--border);
  text-align: left;
}

.placeholder-block img {
  width: 100%;
  max-width: 240px;
  margin-bottom: 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface-muted);
  padding: 12px;
}

.founder {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  align-items: center;
}

.founder img {
  width: 100%;
  max-width: 360px;
  border-radius: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.founder-page header {
  padding: 32px 0 40px;
}

.founder-page section {
  padding: 40px 0 60px;
}

.founder-page .hero {
  gap: 24px;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
}

.founder-page .hero h1 {
  font-size: clamp(28px, 3vw, 44px);
}

.founder-page .hero p {
  font-size: 15px;
}

.founder-portrait img {
  width: 100%;
  max-width: 360px;
  border-radius: 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.founder-layout {
  display: grid;
  gap: 18px;
}

.founder-layout .body-copy {
  padding: 12px 0;
}

.founder-cards {
  gap: 12px;
}


.founder-page .founder {
  grid-template-columns: minmax(220px, 300px) 1fr;
  align-items: start;
  gap: 18px;
}

.founder-page .founder img {
  max-width: 280px;
}

.founder-page .body-copy {
  padding: 20px;
}

.founder-page .grid-3 {
  grid-template-columns: repeat(3, minmax(180px, 1fr));
  gap: 12px;
}

.founder-page .card {
  padding: 14px;
}

.founder-page .card h3 {
  font-size: 15px;
  margin: 8px 0 6px;
}

.founder-page .card p {
  font-size: 13px;
}

.founder-page .footer {
  padding: 24px 0 40px;
}

@media (max-width: 900px) {
  .founder-page .founder {
    grid-template-columns: 1fr;
  }

  .founder-page .grid-3 {
    grid-template-columns: 1fr;
  }
}

body.theme-dark {
  --bg: #0b1224;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #1f2a44;
  --surface: #111827;
  --surface-muted: #0f172a;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
  --font-primary: "Inter", sans-serif;
  background: radial-gradient(1200px 600px at 10% -10%, rgba(37, 99, 235, 0.15) 0%, transparent 55%),
              radial-gradient(800px 500px at 100% 0%, rgba(245, 158, 11, 0.12) 0%, transparent 55%),
              var(--bg);
}

body.theme-dark .btn-secondary,
body.theme-dark .lang-switch,
body.theme-dark .theme-toggle {
  background: rgba(15, 23, 42, 0.6);
  color: var(--text);
  border-color: rgba(226, 232, 240, 0.15);
}

body.theme-dark .nav-toggle {
  background: rgba(15, 23, 42, 0.6);
  color: var(--text);
  border-color: rgba(226, 232, 240, 0.15);
}

body.theme-dark .theme-toggle .icon {
  color: var(--text);
  opacity: 0.7;
}

body.theme-dark .theme-toggle .knob {
  transform: translateX(16px);
  background: rgba(245, 158, 11, 0.9);
  box-shadow: 0 6px 16px rgba(245, 158, 11, 0.35);
}

body.theme-dark header::after {
  background: linear-gradient(180deg, rgba(11, 18, 36, 0.92) 0%, rgba(11, 18, 36, 0.7) 55%, rgba(11, 18, 36, 0.96) 100%);
}

body.theme-dark.home-page::before {
  background: linear-gradient(180deg, rgba(11, 18, 36, 0.82) 0%, rgba(11, 18, 36, 0.74) 55%, rgba(11, 18, 36, 0.9) 100%);
}

body.theme-dark.download-page::before {
  background: linear-gradient(180deg, rgba(11, 18, 36, 0.82) 0%, rgba(11, 18, 36, 0.74) 55%, rgba(11, 18, 36, 0.9) 100%);
}

.home-page .hero h1,
.home-page .hero p,
.home-page .section-title h2,
.home-page .section-title p {
  text-shadow: 0 2px 12px rgba(15, 23, 42, 0.2);
}

.home-page .shot {
  cursor: pointer;
}

.home-page .shot:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 50px rgba(15, 23, 42, 0.14);
}

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 50;
  padding: 24px;
}

.lightbox.open { opacity: 1; pointer-events: auto; }

.lightbox-content {
  background: var(--surface);
  border-radius: 24px;
  padding: 20px;
  max-width: 90vw;
  max-height: 90vh;
  box-shadow: 0 30px 80px rgba(15, 23, 42, 0.25);
  position: relative;
}

.lightbox-content img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 70vh;
  object-fit: contain;
  border-radius: 16px;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  padding: 16px;
}

.lightbox-caption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.lightbox-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: none;
  background: rgba(15, 23, 42, 0.08);
  color: var(--text);
  font-weight: 700;
  cursor: pointer;
}

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
  body.nav-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    right: 0;
    top: 56px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 12px;
    min-width: 220px;
    box-shadow: var(--shadow);
    z-index: 20;
  }

  body.nav-open .dropdown-menu {
    position: static;
    opacity: 1;
    pointer-events: auto;
    transform: none;
    margin-top: 6px;
    box-shadow: none;
    border: none;
    padding: 0;
  }

  body.nav-open .dropdown-menu a {
    padding-left: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .hero-video {
    display: none !important;
  }
}