:root {
  --bg: #f6f8fc;
  --bg-soft: rgba(255, 255, 255, 0.72);
  --panel: #ffffff;
  --panel-2: #f8fafc;
  --text: #0f172a;
  --text-soft: #475569;
  --text-muted: #64748b;
  --border: rgba(15, 23, 42, 0.1);
  --border-strong: rgba(15, 23, 42, 0.16);
  --accent: #2563eb;
  --accent-2: #06b6d4;
  --accent-soft: rgba(37, 99, 235, 0.14);
  --shadow: 0 18px 60px rgba(15, 23, 42, 0.08);
  --shadow-strong: 0 24px 80px rgba(15, 23, 42, 0.12);
  --radius-xl: 34px;
  --radius-lg: 28px;
  --radius-md: 20px;
}

html.dark {
  --bg: #06070b;
  --bg-soft: rgba(255, 255, 255, 0.03);
  --panel: rgba(255, 255, 255, 0.05);
  --panel-2: rgba(255, 255, 255, 0.04);
  --text: #ffffff;
  --text-soft: #e4e4e7;
  --text-muted: #a1a1aa;
  --border: rgba(255, 255, 255, 0.1);
  --border-strong: rgba(255, 255, 255, 0.18);
  --accent: #60a5fa;
  --accent-2: #22d3ee;
  --accent-soft: rgba(96, 165, 250, 0.14);
  --shadow: 0 22px 70px rgba(0, 0, 0, 0.32);
  --shadow-strong: 0 30px 90px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  background: var(--bg);
  color: var(--text);
  transition:
    background 0.35s ease,
    color 0.35s ease;
}

main {
  padding: 0px 0 84px;
}
section {
  margin-top: 96px;
}

body {
  margin: 0;
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  background: var(--bg);
  color: var(--text);
  transition:
    background 0.35s ease,
    color 0.35s ease;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input,
textarea,
select {
  font: inherit;
}
button {
  border: 0;
  background: none;
  color: inherit;
  cursor: pointer;
}

.container {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
}

.header-wrap {
  position: sticky;
  top: 0;
  z-index: 50;
  padding-top: 16px;
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 18px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  backdrop-filter: blur(16px);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  background: linear-gradient(
    135deg,
    rgba(59, 130, 246, 0.2),
    rgba(34, 211, 238, 0.08)
  );
  flex-shrink: 0;
  font-size: 18px;
}
.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 30%;
}

.brand-copy strong,
.brand-copy span {
  display: block;
}
.brand-copy strong {
  font-size: 14px;
  letter-spacing: 0.03em;
}
.brand-copy span {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.2s ease;
}
.nav a:hover {
  color: var(--text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 16px;
  border-radius: 16px;
  border: 1px solid transparent;
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    box-shadow 0.2s ease;
}
.btn:hover {
  transform: translateY(-2px);
}
.btn-primary {
  background: var(--text);
  color: var(--bg);
  box-shadow: var(--shadow);
}
.btn-secondary {
  background: var(--panel);
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-elite {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  border-color: transparent;
  box-shadow: 0 18px 40px rgba(37, 99, 235, 0.22);
}
.btn-elite::before {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: 15px;
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.12),
    rgba(255, 255, 255, 0.02)
  );
  pointer-events: none;
}
.btn-elite > span,
.btn-elite > strong {
  position: relative;
  z-index: 1;
}
.icon-btn {
  width: 44px;
  padding: 0;
}
.mobile-toggle {
  display: none;
}
.mobile-nav {
  display: none;
  margin-top: 10px;
  padding: 12px;
  border-radius: 22px;
  border: 1px solid var(--border-strong);
  background: var(--panel); /* stronger than bg-soft */
  box-shadow: var(--shadow-strong);
}
.mobile-nav.open {
  display: grid;
  gap: 10px;
}
.mobile-nav a {
  padding: 12px 14px;
  border-radius: 14px;
  color: var(--text); /* was muted → now visible */
  font-weight: 600;
  background: rgba(255, 255, 255, 0.05);
}
.mobile-nav a:hover {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
}

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

/* icon style */
.m-icon {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  font-size: 14px;
  flex-shrink: 0;
}

.mobile-nav a:hover .m-icon {
  background: white;
  color: black;
}

.m-icon {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  border: none;
}

html.dark .mobile-nav {
  background: rgba(15, 23, 42, 0.96);
  border-color: rgba(255, 255, 255, 0.18);
}

html.dark .mobile-nav a {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
}

html.dark .mobile-nav a:hover {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #ffffff;
}
main {
  padding: 39px 0 84px;
}
#hero {
  margin-top: 5px;
}
section {
  margin-top: 96px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: var(--text-soft);
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 34px;
  align-items: center;
}
.hero h1 {
  margin: 18px 0 16px;
  font-size: clamp(3rem, 7vw, 5.5rem);
  line-height: 0.93;
  letter-spacing: -0.055em;
}
.hero h1 span {
  display: block;
  background: linear-gradient(
    90deg,
    var(--text),
    color-mix(in srgb, var(--text) 55%, transparent)
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p {
  margin: 0;
  max-width: 720px;
  color: var(--text-muted);
  font-size: 17px;
  line-height: 1.9;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.panel,
.card,
.stat,
.system-card,
.paper-card,
.signal-card,
.principle,
.footer-box,
.contact-option,
.contact-concept,
.layer-card {
  border: 1px solid var(--border);
  background: var(--panel);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.stat {
  padding: 20px;
}
.stat strong {
  display: block;
  font-size: 28px;
  margin-bottom: 6px;
}
.stat span {
  color: var(--text-muted);
  font-size: 14px;
}

.hero-visual {
  position: relative;
  min-height: 590px;
  padding: 20px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--border);
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--panel) 88%, transparent),
    color-mix(in srgb, var(--panel-2) 96%, transparent)
  );
  box-shadow: var(--shadow-strong);
}
.hero-grid,
.system-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(
      color-mix(in srgb, var(--text) 8%, transparent) 1px,
      transparent 1px
    ),
    linear-gradient(
      90deg,
      color-mix(in srgb, var(--text) 8%, transparent) 1px,
      transparent 1px
    );
  background-size: 34px 34px;
  opacity: 0.28;
  pointer-events: none;
}
.orb {
  position: absolute;
  border-radius: 999px;
  filter: blur(48px);
  pointer-events: none;
}
.orb-1 {
  width: 230px;
  height: 230px;
  top: 18px;
  left: -46px;
  background: rgba(59, 130, 246, 0.18);
}
.orb-2 {
  width: 270px;
  height: 270px;
  right: -54px;
  bottom: -28px;
  background: rgba(34, 211, 238, 0.13);
}
.hero-inner {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
}
.mini-panel {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border-radius: 22px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  backdrop-filter: blur(14px);
}
.mini-panel small,
.muted {
  color: var(--text-muted);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 30px;
  padding: 0 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  font-size: 12px;
  color: var(--text-soft);
}
.visual-stack {
  display: grid;
  gap: 14px;
}
.visual-card {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 18px;
  border-radius: 24px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  transition:
    transform 0.2s ease,
    border-color 0.2s ease;
}
.visual-card:hover,
.system-card:hover,
.signal-card:hover,
.principle:hover,
.contact-option:hover,
.layer-card:hover,
.paper-card:hover {
  transform: translateY(-4px);
}
.icon-box {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  background: var(--panel-2);
  flex-shrink: 0;
  font-size: 18px;
}

.section-head {
  max-width: 820px;
  margin-bottom: 28px;
}
.section-head h2 {
  margin: 16px 0 12px;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.02;
  letter-spacing: -0.05em;
}
.section-head p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.9;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}
.layer-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 22px;
  padding: 30px;
  transition: transform 0.2s ease;
}
.layer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}
.layer-card h3 {
  margin: 0 0 10px;
  font-size: 34px;
  letter-spacing: -0.04em;
}
.layer-card p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.85;
}
.list-grid {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}
.list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--panel-2);
}
.dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--accent);
  flex-shrink: 0;
}

.controls-bar {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 20px;
  margin-bottom: 24px;
}
.controls {
  width: min(100%, 540px);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.search-wrap,
.select-wrap {
  position: relative;
  flex: 1 1 220px;
}
.field,
.select,
.textarea {
  width: 100%;
  min-height: 52px;
  padding: 0 16px;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  outline: none;
  transition: border-color 0.2s ease;
}
.field:focus,
.select:focus,
.textarea:focus {
  border-color: var(--accent);
}
.search-wrap .field {
  padding-left: 42px;
}
.select-wrap .select {
  padding-left: 42px;
  appearance: none;
}
.search-icon,
.filter-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}
.pill {
  padding: 10px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text-soft);
  transition: all 0.2s ease;
}
.pill.active {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
}

.systems-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}
.system-card {
  overflow: hidden;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}
.system-top {
  position: relative;
  min-height: 236px;
  padding: 20px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--panel-2) 92%, transparent),
    color-mix(in srgb, var(--panel) 96%, transparent)
  );
}
.system-top::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(59, 130, 246, 0.12),
    rgba(34, 211, 238, 0.08),
    transparent
  );
  pointer-events: none;
}
.system-top-inner,
.system-bottom {
  position: relative;
  z-index: 1;
}
.system-top-inner {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
}
.system-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.system-media {
  position: relative;
  height: 126px;
  margin: 18px 0 14px;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--border);
  background:
    radial-gradient(
      circle at top left,
      rgba(96, 165, 250, 0.22),
      transparent 38%
    ),
    radial-gradient(
      circle at bottom right,
      rgba(34, 211, 238, 0.16),
      transparent 36%
    ),
    color-mix(in srgb, var(--panel) 82%, transparent);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}
.system-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0.95;
}
.system-media-note {
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-muted);
}
.system-media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 52%;
  background: linear-gradient(
    180deg,
    rgba(2, 6, 23, 0),
    rgba(2, 6, 23, 0.08) 58%,
    rgba(2, 6, 23, 0.26)
  );
  pointer-events: none;
}
.system-category {
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--text-soft);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 88%, transparent);
}
.system-title {
  margin: 0;
  font-size: 24px;
  line-height: 1.2;
}
.system-highlight {
  margin: 10px 0 0;
  color: var(--text-muted);
  line-height: 1.7;
}
.system-bottom {
  padding: 22px;
}
.system-solution {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.85;
}
.research-signal {
  margin-top: 16px;
  padding: 16px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--accent-soft) 65%, transparent),
    color-mix(in srgb, var(--panel-2) 92%, transparent)
  );
}
.signal-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--text-muted);
}
.signal-text {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.7;
  font-size: 14px;
}
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.tag {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-soft);
}
.system-actions {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
}
.inspect-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-soft);
  font-size: 14px;
}
.action-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
}
.empty-state {
  display: none;
  padding: 42px 22px;
  border-radius: 28px;
  border: 1px solid var(--border);
  background: var(--panel);
  text-align: center;
}

.signals-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}
.signal-card {
  position: relative;
  overflow: hidden;
  padding: 28px;
  transition: transform 0.2s ease;
}
.signal-card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(
    90deg,
    var(--accent),
    var(--accent-2),
    transparent
  );
}
.signal-card p {
  margin: 12px 0 0;
  color: var(--text-muted);
  line-height: 1.85;
}

.research-layout,
.founder-layout,
.contact-layout {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 24px;
}
.paper-card,
.panel,
.card,
.contact-concept {
  padding: 22px;
}
.paper-card + .paper-card {
  margin-top: 14px;
}
.paper-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}
.paper-title {
  margin: 0;
  font-size: 19px;
  line-height: 1.45;
}
.paper-meta,
.panel p,
.founder-copy p,
.contact-copy p,
.footer-box span {
  color: var(--text-muted);
  line-height: 1.85;
}
.founder-portrait-wrap {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.founder-portrait-note {
  text-align: center;
}
.founder-portrait {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 4 / 5;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: linear-gradient(
    135deg,
    rgba(59, 130, 246, 0.14),
    rgba(34, 211, 238, 0.08)
  );
  box-shadow: var(--shadow);
}
.founder-portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.founder-portrait-note {
  max-width: 320px;
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-muted);
}
.paper-summary {
  margin: 12px 0 0;
  color: var(--text-muted);
  line-height: 1.85;
}
.paper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.publication-btn {
  padding-inline: 18px;
  min-height: 48px;
  border-radius: 18px;
}
.publication-btn strong {
  font-weight: 600;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}
.principle {
  padding: 24px;
  transition: transform 0.2s ease;
}
.principle small {
  display: block;
  margin-bottom: 18px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.principle strong {
  font-size: 20px;
  line-height: 1.45;
}

.contact-section {
  position: relative;
  overflow: hidden;
  padding: 34px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--panel) 96%, transparent),
    color-mix(in srgb, var(--panel-2) 88%, transparent)
  );
  box-shadow: var(--shadow-strong);
}
.contact-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at top right,
    rgba(59, 130, 246, 0.18),
    transparent 28%
  );
  pointer-events: none;
}
.contact-layout {
  position: relative;
  z-index: 1;
  align-items: end;
}
.contact-options {
  display: grid;
  gap: 12px;
}
.contact-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  transition: transform 0.2s ease;
}
.contact-option-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.contact-concepts-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.contact-concept h4 {
  margin: 12px 0 8px;
  font-size: 18px;
}
.contact-concept p {
  margin: 0;
}

html.dark .test-item {
  background: rgba(255, 255, 255, 0.04);
}

.footer-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 18px 20px;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--text-muted);
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(2, 6, 23, 0.68);
  backdrop-filter: blur(8px);
  z-index: 100;
}
.modal.open {
  display: flex;
}
.modal-panel {
  position: relative;
  width: min(980px, 100%);
  max-height: 90vh;
  overflow: auto;
  padding: 28px;
  border-radius: 30px;
  border: 1px solid var(--border);
  background: var(--bg);
  box-shadow: var(--shadow-strong);
}
.close-btn {
  position: absolute;
  right: 16px;
  top: 16px;
  width: 40px;
  height: 40px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel);
}
.modal-title {
  margin: 0 0 6px;
  font-size: 30px;
  letter-spacing: -0.04em;
}
.modal-subtitle {
  margin: 0;
  color: var(--text-muted);
}
.modal-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin-top: 24px;
}
.modal-block h4 {
  margin: 0 0 10px;
  font-size: 15px;
}
.modal-block p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.85;
}
.architecture-grid {
  display: grid;
  gap: 10px;
  margin-top: 10px;
}
.architecture-item,
.context-box {
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--panel-2);
}
.form-grid {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}
.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.textarea {
  min-height: 150px;
  padding: 14px 16px;
  resize: vertical;
}
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  flex-wrap: wrap;
}
.back-to-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--panel);
  backdrop-filter: blur(10px);
  color: var(--text);
  font-size: 20px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.25s ease;
  z-index: 999;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(0) scale(1.08);
  border-color: var(--border-strong);
}
@media (max-width: 1100px) {
  .hero,
  .research-layout,
  .founder-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }
  .systems-grid,
  .signals-grid,
  .contact-concepts-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .principles-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .nav,
  .desktop-cta {
    display: none;
  }
  .mobile-toggle {
    display: inline-flex;
  }
  .grid-2,
  .systems-grid,
  .signals-grid,
  .principles-grid,
  .modal-grid,
  .form-row,
  .stats,
  .contact-concepts-grid {
    grid-template-columns: 1fr;
  }
  .controls-bar,
  .footer-box {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-visual {
    min-height: 470px;
  }
  section {
    margin-top: 74px;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 20px, 1240px);
  }
  .header {
    padding: 12px 14px;
  }
  .hero-visual,
  .contact-section,
  .layer-card,
  .modal-panel {
    padding: 18px;
  }
  .hero h1 {
    font-size: 2.8rem;
  }
}

.brand {
  text-decoration: none;
  color: inherit;
}