:root {
  color-scheme: light;
  --bg: #f7f9fc;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: #ffffff;
  --line: rgba(19, 32, 54, 0.1);
  --line-strong: rgba(19, 32, 54, 0.16);
  --text: #162133;
  --muted: #556173;
  --blue: #1f5eff;
  --red: #d93b3b;
  --white: #ffffff;
  --shadow: 0 8px 20px rgba(21, 32, 51, 0.06);
  --shadow-strong: 0 12px 28px rgba(21, 32, 51, 0.08);
  --radius: 8px;
  --container: min(1140px, calc(100vw - 2rem));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Inter', "Segoe UI Variable Text", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.5;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(31, 94, 255, 0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(217, 59, 59, 0.08), transparent 26%),
    linear-gradient(180deg, #ffffff 0%, var(--bg) 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(19, 32, 54, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(19, 32, 54, 0.03) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.8), transparent 80%);
  opacity: 0.4;
}

a {
  color: inherit;
}

[hidden] {
  display: none !important;
}

button,
select,
input {
  font: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.site-header,
.site-footer {
  border-bottom: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.96);
}

.site-footer {
  border-top: 1px solid var(--line-strong);
  border-bottom: 0;
}

.header-grid,
.footer-grid {
  display: grid;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  font-weight: 800;
  text-decoration: none;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
  color: var(--text);
}

/* Headings and UI use a geometric, slightly condensed face */
h1, h2, h3, .brand, .nav-link, .eyebrow {
  font-family: 'Rajdhani', 'Inter', Arial, sans-serif;
  letter-spacing: 0.04em;
}

.nav-toggle {
  justify-self: end;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  border: 1px solid var(--line-strong);
  background: var(--surface-strong);
  color: var(--text);
  box-shadow: 0 8px 18px rgba(21, 32, 51, 0.06);
  display: grid;
  place-items: center;
  gap: 3px;
  cursor: pointer;
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
}

.main-nav {
  display: none;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.main-nav.is-open {
  display: flex;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--muted);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  background: transparent;
}

.nav-link:hover {
  color: var(--blue);
  background: rgba(31, 94, 255, 0.08);
}

.nav-link.is-active {
  color: var(--blue);
  background: rgba(31, 94, 255, 0.12);
  border-color: rgba(31, 94, 255, 0.16);
}

main {
  padding: 1.25rem 0 4rem;
}

.section {
  width: var(--container);
  margin: 0 auto;
  padding: 2rem 0;
}

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

.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(247,249,252,0.98));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 1.15rem;
  box-shadow: var(--shadow);
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-strong);
}

.card-actions {
  margin-top: 0.85rem;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.74rem;
  font-weight: 700;
}

.hero-grid {
  display: grid;
  gap: 1rem;
  align-items: stretch;
  transform: translateY(-40px);

}

.hero-copy,
.hero-media {
  background: linear-gradient(180deg, rgba(255,255,255,0.98), rgba(247,249,252,0.98));
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow-strong);
}

.hero-copy {
  padding: clamp(1.5rem, 4vw, 3rem);
}

.hero-copy h1 {
  margin: 0;
  font-size: clamp(2.7rem, 5vw, 4.8rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
  max-width: 10ch;
}

.lede {
  max-width: 60ch;
  color: var(--muted);
  font-size: 1.08rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.button-primary,
.button-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid var(--line-strong);
}

.button-primary {
  background: linear-gradient(135deg, var(--blue), #174bd8);
  color: var(--white);
  box-shadow: 0 8px 18px rgba(31, 94, 255, 0.12);
}

.button-secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.98);
}

.hero-media {
  padding: 1rem;
  display: grid;
  gap: 0.9rem;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.photo-slot {
  min-height: 180px;
  padding: 1rem;
  border-radius: var(--radius);
  border: 1px solid rgba(31, 94, 255, 0.12);
  background:
    linear-gradient(135deg, rgba(31, 94, 255, 0.16), rgba(217, 59, 59, 0.08)),
    repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.35), rgba(255, 255, 255, 0.35) 12px, rgba(255, 255, 255, 0.12) 12px, rgba(255, 255, 255, 0.12) 24px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--text);
}

.photo-slot-large {
  min-height: 260px;
}

.photo-slot span {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.photo-slot strong {
  max-width: 10ch;
  font-size: 1.15rem;
}

.info-grid {
  display: grid;
  gap: 1rem;
}

.start-section,
.page-preview {
  display: grid;
  gap: 1rem;
}

.section-heading h2,
.page-card h3,
.card h2,
.card h3 {
  margin-top: 0;
}

.starter-layout {
  display: grid;
  gap: 1rem;
}

.slider-card {
  display: grid;
  gap: 1rem;
}

.slider-card label {
  display: grid;
  gap: 0.5rem;
  color: var(--text);
  font-weight: 600;
}

.slider-card input[type="range"] {
  width: 100%;
  accent-color: var(--blue);
}

.slider-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.slider-row output {
  color: var(--text);
  font-weight: 700;
}

.recommendation-card {
  display: grid;
  gap: 0.75rem;
  align-content: start;
}

.recommendation-card [hidden] {
  display: none !important;
}

.recommendation-card h3 {
  font-size: 1.5rem;
}

.muted {
  color: var(--muted);
}

.page-links-grid {
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
}

.page-card {
  text-decoration: none;
  color: inherit;
  display: grid;
  align-content: start;
  min-height: 180px;
}

.page-card p {
  margin-bottom: 0;
}

.page-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-strong);
}

.starter-options {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.85rem;
}

.starter-option {
  display: grid;
  gap: 0.35rem;
}

.starter-option p {
  margin: 0;
  color: var(--muted);
}

.journey-section {
  display: grid;
  gap: 1rem;
}

.journey-chart {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 1rem;
}

.journey-step {
  position: relative;
  display: grid;
  gap: 0.5rem;
}

.journey-step span {
  width: 2rem;
  height: 2rem;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: rgba(31, 94, 255, 0.12);
  color: var(--blue);
  font-weight: 800;
}

.journey-step h3 {
  margin-bottom: 0;
}

.journey-step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 1rem;
  bottom: -0.65rem;
  width: 2px;
  height: 0.65rem;
  background: linear-gradient(180deg, rgba(31, 94, 255, 0.7), rgba(217, 59, 59, 0.3));
}

.control-gate {
  padding-top: 0.75rem;
  width: var(--container);
}

.control-gate-card {
  display: grid;
  gap: 1rem;
  max-width: 920px;
  margin: 0 auto;
  position: relative;
  z-index: 3;
  background-color: #d93b3b;
  background: linear-gradient(180deg, rgba(217, 59, 59, 0.16), rgba(255, 255, 255, 0.96));
}

.control-check-form {
  display: grid;
  gap: 1rem;
}

.control-check-form label {
  display: grid;
  gap: 0.45rem;
  font-weight: 700;
}

.control-check-form input[type="number"],
.control-check-form select {
  min-height: 46px;
  padding: 0.65rem 0.9rem;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: var(--surface-strong);
  color: var(--text);
}

.control-acknowledgement {
  display: flex !important;
  align-items: flex-start;
  gap: 0.7rem;
  font-weight: 600;
}

.control-acknowledgement input {
  margin-top: 0.2rem;
}

.control-warning {
  border-radius: 26px;
  border: 2px solid transparent;
  box-shadow: var(--shadow-strong);
  padding: 1.15rem;
  margin-top: 1rem;
}

.control-warning--danger {
  background: linear-gradient(180deg, rgba(217, 59, 59, 0.16), rgba(255, 255, 255, 0.96));
  border-color: rgba(217, 59, 59, 0.42);
}

.control-warning--approved {
  background: linear-gradient(180deg, rgba(255, 191, 71, 0.18), rgba(255, 255, 255, 0.96));
  border-color: rgba(197, 134, 0, 0.38);
}

.control-warning-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.control-warning-close {
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.8);
  color: var(--text);
  border-radius: 999px;
  padding: 0.55rem 0.9rem;
  font-weight: 700;
  cursor: pointer;
}

.control-warning h2 {
  margin-top: 0.25rem;
}

.control-warning ul {
  margin-bottom: 0;
}

.control-warning li {
  color: var(--muted);
}

body[data-page="electronics"] #active-control-shell {
  display: none !important;
}

body[data-page="electronics"].active-control-unlocked #active-control-shell {
  display: block !important;
}

body[data-page="electronics"] #active-control-gate {
  position: relative;
}

body[data-page="electronics"] .control-gate-card {
  box-shadow: 0 22px 56px rgba(21, 32, 51, 0.14);
  border: 1px solid rgba(31, 94, 255, 0.14);
  backdrop-filter: blur(14px);
}

body[data-page="electronics"] .control-gate-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 26px;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(31, 94, 255, 0.12), rgba(217, 59, 59, 0.06));
  z-index: -1;
}

.region-panel {
  display: grid;
  gap: 0.9rem;
}

.region-toolbar {
  display: grid;
  gap: 0.4rem;
  align-items: center;
  grid-template-columns: 1fr;
}

.region-toolbar label {
  font-weight: 700;
  color: var(--text);
}

.region-toolbar select {
  width: 100%;
  min-height: 46px;
  padding: 0.65rem 0.9rem;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: var(--surface-strong);
  color: var(--text);
  box-shadow: inset 0 1px 2px rgba(21, 32, 51, 0.04);
}

.region-status {
  color: var(--muted);
  font-size: 0.96rem;
}

.footer-grid {
  align-items: center;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.footer-nav a {
  text-decoration: none;
  color: var(--muted);
}

.footer-nav a:hover {
  color: var(--blue);
}

.card p,
.card li {
  color: var(--muted);
}

select:focus,
button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(31, 94, 255, 0.24);
  outline-offset: 2px;
}

.nav-toggle,
.nav-link,
.button-primary,
.button-secondary,
.card,
.photo-slot,
.page-card,
.slider-card input[type="range"] {
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    background-color 160ms ease,
    border-color 160ms ease,
    color 160ms ease;
}

.nav-toggle:hover,
.nav-link:hover,
.button-primary:hover,
.button-secondary:hover,
.page-card:hover {
  transform: translateY(-1px);
}

@media (min-width: 900px) {
  .header-grid,
  .footer-grid {
    grid-template-columns: auto 1fr;
    align-items: center;
  }

  .nav-toggle {
    display: none;
  }

  .main-nav {
    display: flex !important;
    justify-content: flex-end;
  }

  .hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .region-toolbar {
    grid-template-columns: auto minmax(240px, 320px) 1fr;
  }

  .info-grid,
  .starter-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .start-section,
  .page-preview {
    gap: 1.2rem;
  }

  .journey-chart {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .journey-step:not(:last-child)::after {
    left: auto;
    right: -0.5rem;
    top: 50%;
    bottom: auto;
    width: 0.75rem;
    height: 2px;
    transform: translateY(-50%);
  }

  .section {
    padding: 2.4rem 0;
  }

  .control-check-form {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .control-check-form .control-acknowledgement,
  .control-check-form button {
    grid-column: 1 / -1;
  }
}

@media (max-width: 699px) {
  .photo-grid {
    grid-template-columns: 1fr;
  }

  .photo-slot-large {
    min-height: 220px;
  }
}