/* MorphoTri — Corporate landing page */
:root {
  --bg: #05060a;
  --bg-elevated: rgba(8, 10, 18, 0.92);
  --bg-section-alt: #0a0d14;
  --fg: #f2f5ff;
  --muted: rgba(242, 245, 255, 0.72);
  --muted2: rgba(242, 245, 255, 0.5);
  --accent1: 86, 220, 255;
  --accent2: 192, 122, 255;
  --accent3: 255, 120, 180;
  --cta: 255, 95, 120;
  --border: rgba(255, 255, 255, 0.12);
  --border-focus: rgba(var(--accent1), 0.55);
  --glass: rgba(255, 255, 255, 0.04);
  --radius-xl: 22px;
  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 56px;
  --space-2xl: 88px;
  --content-max: 1140px;
  --nav-height: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 16px);
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  overflow-x: hidden;
}

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

a {
  color: rgb(var(--accent1));
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

a:hover {
  color: rgb(var(--accent2));
}

a:focus-visible {
  outline: 2px solid rgba(var(--accent1), 0.55);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: var(--space-sm);
  z-index: 200;
  padding: 10px 16px;
  background: var(--fg);
  color: var(--bg);
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.skip-link:focus {
  left: var(--space-sm);
}

/* Ambient */
.ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.ambient__orb {
  position: absolute;
  width: min(720px, 95vw);
  height: min(720px, 95vw);
  border-radius: 50%;
  background: radial-gradient(
    circle at center,
    rgba(var(--accent1), 0.18),
    rgba(var(--accent2), 0.1) 45%,
    transparent 70%
  );
  filter: blur(56px);
  opacity: 0.45;
  left: 20%;
  top: 12%;
}

.ambient__orb--secondary {
  left: auto;
  right: -5%;
  top: 55%;
  width: min(520px, 80vw);
  height: min(520px, 80vw);
  background: radial-gradient(
    circle at center,
    rgba(var(--accent3), 0.12),
    rgba(var(--accent2), 0.08) 50%,
    transparent 72%
  );
}

.ambient__grid {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.5) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 20%, black, transparent);
}

.ambient__grain {
  position: absolute;
  inset: 0;
  opacity: 0.06;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='320' height='320'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='4'/%3E%3C/filter%3E%3Crect width='320' height='320' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
  background-size: 320px 320px;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(5, 6, 10, 0.72);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(14px);
  transition:
    border-color 0.3s var(--ease),
    background 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--border);
  background: rgba(5, 6, 10, 0.9);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.site-header__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  height: 100%;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--fg);
  text-decoration: none;
}

.site-header__brand:hover {
  color: var(--fg);
}

.site-header__logo {
  height: 34px;
  width: auto;
  max-width: 130px;
  object-fit: contain;
}

.site-header__name {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  display: block;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
  text-decoration: none;
  transition:
    color 0.2s var(--ease),
    background 0.2s var(--ease);
}

.site-nav__link:hover,
.site-nav__link.is-active {
  color: var(--fg);
  background: var(--glass);
}

.site-nav__link.is-active {
  color: rgb(var(--accent1));
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 4px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: var(--glass);
}

.lang-switch__btn {
  min-width: 36px;
  padding: 6px 10px;
  border: none;
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--muted2);
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition:
    color 0.2s var(--ease),
    background 0.2s var(--ease);
}

.lang-switch__btn:hover {
  color: var(--fg);
}

.lang-switch__btn.is-active {
  background: rgba(var(--accent1), 0.15);
  color: rgb(var(--accent1));
}

.lang-switch__btn:focus-visible {
  outline: 2px solid rgba(var(--accent1), 0.55);
  outline-offset: 2px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--glass);
  color: var(--fg);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle:focus-visible {
  outline: 2px solid rgba(var(--accent1), 0.55);
  outline-offset: 2px;
}

.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  position: relative;
  transition: background 0.2s;
}

.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.25s var(--ease), top 0.25s var(--ease);
}

.nav-toggle__bar::before {
  top: -6px;
}

.nav-toggle__bar::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after {
  top: 0;
  transform: rotate(-45deg);
}

/* Main layout */
.site-main {
  position: relative;
  z-index: 1;
}

.section {
  padding: var(--space-2xl) var(--space-md);
}

.section__inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.section__header {
  max-width: 640px;
  margin-bottom: var(--space-xl);
}

.section__header--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section__eyebrow {
  display: inline-block;
  margin-bottom: var(--space-sm);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgb(var(--accent1));
}

.grad {
  background: linear-gradient(
    105deg,
    rgb(var(--accent1)) 0%,
    rgb(var(--accent2)) 48%,
    rgb(var(--accent3)) 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

h1 {
  font-size: clamp(2rem, 5.5vw, 3.25rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 700;
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
}

.section__lead {
  margin: var(--space-sm) 0 0;
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 52ch;
}

.section__header--center .section__lead {
  margin-left: auto;
  margin-right: auto;
}

/* Hero */
.hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--nav-height) + var(--space-xl));
  padding-bottom: var(--space-2xl);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgba(var(--accent1), 0.08), transparent 60%),
    radial-gradient(ellipse 50% 40% at 90% 80%, rgba(var(--accent2), 0.06), transparent 55%);
  pointer-events: none;
}

.hero__lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
}

.hero__lines svg {
  width: 100%;
  height: 100%;
}

.hero__content {
  position: relative;
  max-width: 780px;
}

.hero__subtitle {
  margin: var(--space-md) 0 var(--space-lg);
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: var(--muted);
  max-width: 54ch;
  line-height: 1.6;
}

.trust-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-md);
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
}

.trust-bar__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted2);
  letter-spacing: 0.02em;
}

.trust-bar__item::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgb(var(--accent1));
  box-shadow: 0 0 8px rgba(var(--accent1), 0.6);
  flex-shrink: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--fg);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition:
    border-color 0.2s var(--ease),
    background 0.2s var(--ease),
    box-shadow 0.2s var(--ease);
}

.btn:hover {
  border-color: rgba(var(--accent1), 0.4);
  background: rgba(var(--accent1), 0.08);
  box-shadow: 0 0 28px rgba(var(--accent1), 0.15);
  color: var(--fg);
}

.btn:focus-visible {
  outline: 2px solid rgba(var(--accent1), 0.55);
  outline-offset: 2px;
}

.btn--primary {
  border-color: rgba(var(--accent1), 0.35);
  background: linear-gradient(
    135deg,
    rgba(var(--accent1), 0.2),
    rgba(var(--accent2), 0.16)
  );
}

.btn--primary:hover {
  border-color: rgba(var(--accent1), 0.55);
  box-shadow:
    0 0 32px rgba(var(--accent1), 0.22),
    0 0 48px rgba(var(--accent2), 0.1);
}

.btn--cta {
  border-color: rgba(var(--cta), 0.5);
  background: rgb(var(--cta));
  color: #fff;
}

.btn--cta:hover {
  background: rgb(255, 115, 140);
  border-color: rgba(var(--cta), 0.7);
  box-shadow: 0 8px 32px rgba(var(--cta), 0.35);
  color: #fff;
}

.btn--ghost {
  color: var(--muted);
  background: transparent;
}

.btn--ghost:hover {
  color: var(--fg);
}

.btn--sm {
  padding: 10px 18px;
  font-size: 0.85rem;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  align-items: center;
}

/* Cards grid */
.card-grid {
  display: grid;
  gap: var(--space-md);
}

.card-grid--2 {
  grid-template-columns: repeat(2, 1fr);
}

.card-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.card-grid--4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .card-grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .card-grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .card-grid--4,
  .card-grid--3,
  .card-grid--2 {
    grid-template-columns: 1fr;
  }
}

/* Service / value cards */
.feature-card {
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  backdrop-filter: blur(8px);
  transition:
    border-color 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.feature-card:hover {
  border-color: rgba(var(--accent1), 0.35);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
}

.feature-card__icon {
  width: 72px;
  height: 72px;
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-shrink: 0;
}

.feature-card__icon img {
  width: 72px;
  height: 72px;
  display: block;
  object-fit: contain;
}

.feature-card:hover .feature-card__icon img {
  opacity: 0.92;
}

.feature-card p {
  margin: var(--space-xs) 0 0;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.55;
}

/* Why section */
.section--alt {
  background: var(--bg-section-alt);
  border-block: 1px solid var(--border);
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

@media (max-width: 768px) {
  .why-grid {
    grid-template-columns: 1fr;
  }
}

.why-item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.02);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.why-item:hover {
  border-color: rgba(var(--accent2), 0.3);
  background: rgba(var(--accent2), 0.04);
}

.why-item__num {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  color: rgb(var(--accent2));
  background: rgba(var(--accent2), 0.08);
}

.why-item p {
  margin: 6px 0 0;
  font-size: 0.92rem;
  color: var(--muted);
}

/* Project cards */
.project-card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  overflow: hidden;
  transition:
    border-color 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.project-card:hover {
  border-color: rgba(var(--accent1), 0.3);
  box-shadow: 0 20px 56px rgba(0, 0, 0, 0.4);
}

.project-card__visual {
  aspect-ratio: 16 / 10;
  background:
    linear-gradient(135deg, rgba(var(--accent1), 0.12), rgba(var(--accent2), 0.08)),
    rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border);
}

.project-card__visual span {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted2);
}

.project-card__body {
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: var(--space-sm);
}

.project-card__tag {
  align-self: flex-start;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgb(var(--accent1));
  background: rgba(var(--accent1), 0.08);
}

.project-card p {
  margin: 0;
  flex: 1;
  font-size: 0.9rem;
  color: var(--muted);
}

/* About */
.about-text {
  max-width: 720px;
}

.about-text p {
  margin: 0 0 var(--space-md);
  color: var(--muted);
  font-size: 1rem;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.team-section {
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border);
}

.team-section h3 {
  margin-bottom: var(--space-lg);
  font-size: 1.25rem;
}

.founder-card {
  text-align: center;
}

.founder-card__avatar {
  width: 150px;
  height: 150px;
  margin: 0 auto var(--space-sm);
  border-radius: 50%;
  border: 2px solid var(--border);
  background:
    linear-gradient(145deg, rgba(var(--accent1), 0.15), rgba(var(--accent2), 0.1)),
    rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.founder-card__avatar svg {
  width: 48px;
  height: 48px;
  opacity: 0.35;
}

.founder-card__avatar--photo {
  background: rgba(0, 0, 0, 0.25);
}

.founder-card__avatar--photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 18%;
}

.founder-card__name {
  margin: 0 0 4px;
  font-size: 1rem;
  font-weight: 600;
}

.founder-card__role {
  margin: 0 0 var(--space-xs);
  font-size: 0.85rem;
  color: rgb(var(--accent1));
}

.founder-card__bio {
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted2);
  line-height: 1.5;
}

/* Contact */
.section--contact {
  background: #0c0f16;
  padding-block: var(--space-2xl);
  min-height: calc(100vh - var(--nav-height));
  scroll-margin-top: calc(var(--nav-height) + 24px);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: clamp(var(--space-lg), 5vw, var(--space-2xl));
  align-items: start;
}

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

.contact-intro__avatar {
  width: 56px;
  height: 56px;
  margin-bottom: var(--space-md);
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.15);
  background:
    linear-gradient(145deg, rgba(var(--accent1), 0.2), rgba(var(--accent2), 0.12)),
    rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
}

.contact-intro__avatar--photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 18%;
  display: block;
}

.contact-intro h2 {
  margin-bottom: var(--space-sm);
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.contact-intro p {
  margin: 0;
  color: var(--muted);
  max-width: 36ch;
  font-size: 0.95rem;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-field label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted2);
  clip: rect(0, 0, 0, 0);
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.4);
  color: var(--fg);
  font-family: inherit;
  font-size: 0.95rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--muted2);
}

.form-input:hover,
.form-textarea:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(var(--accent1), 0.12);
}

.form-input.is-invalid,
.form-textarea.is-invalid {
  border-color: rgba(var(--cta), 0.6);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: var(--space-xs);
}

.form-check input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  flex-shrink: 0;
  accent-color: rgb(var(--accent1));
  cursor: pointer;
}

.form-check label {
  position: static;
  width: auto;
  height: auto;
  clip: auto;
  overflow: visible;
  font-size: 0.8rem;
  color: var(--muted2);
  line-height: 1.45;
  cursor: pointer;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-xs);
}

.form-actions .btn--cta {
  flex: 1;
  min-width: 180px;
}

.form-privacy {
  margin: var(--space-sm) 0 0;
  font-size: 0.78rem;
  color: var(--muted2);
  line-height: 1.5;
  max-width: 52ch;
}

.form-privacy a {
  color: rgb(var(--accent1));
}

.form-message {
  margin: 0;
  font-size: 0.85rem;
  min-height: 1.25em;
}

.form-message.is-success {
  color: rgb(var(--accent1));
}

.form-message.is-error {
  color: rgb(var(--cta));
}

/* Footer */
.site-footer {
  padding: var(--space-lg) var(--space-md);
  border-top: 1px solid var(--border);
}

.site-footer__inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-sm);
  font-size: 0.8rem;
  color: var(--muted2);
}

/* Back to top */
.back-to-top {
  position: fixed;
  right: var(--space-md);
  bottom: var(--space-md);
  z-index: 90;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: rgba(8, 10, 18, 0.92);
  color: var(--fg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.3s var(--ease),
    visibility 0.3s var(--ease),
    border-color 0.2s,
    box-shadow 0.2s;
  backdrop-filter: blur(10px);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  border-color: rgba(var(--accent1), 0.45);
  box-shadow: 0 0 24px rgba(var(--accent1), 0.2);
}

.back-to-top:focus-visible {
  outline: 2px solid rgba(var(--accent1), 0.55);
  outline-offset: 2px;
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* Desktop nav */
@media (min-width: 961px) {
  .site-header__inner {
    gap: var(--space-lg);
  }

  .site-nav {
    position: static;
    flex: 1;
    justify-content: center;
    transform: none;
    opacity: 1;
    visibility: visible;
    padding: 0;
    background: transparent;
    border: none;
  }

  .site-nav__list {
    justify-content: center;
  }
}

/* Mobile nav */
@media (max-width: 960px) {
  .site-header {
    overflow: visible;
  }

  .nav-toggle {
    display: flex;
    position: relative;
    z-index: 111;
  }

  .site-header__brand {
    position: relative;
    z-index: 111;
  }

  body.nav-open::before {
    content: "";
    position: fixed;
    inset: 0;
    top: var(--nav-height);
    z-index: 99;
    background: rgba(5, 6, 10, 0.92);
    pointer-events: none;
  }

  body.nav-open .site-header {
    backdrop-filter: none;
    background: var(--bg);
    border-bottom-color: var(--border);
  }

  .site-nav {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 110;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-md);
    padding: var(--space-md);
    background-color: var(--bg);
    border-top: 1px solid var(--border);
    box-shadow: -8px 0 40px rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
      opacity 0.25s var(--ease),
      visibility 0.25s var(--ease);
  }

  .site-nav.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .site-nav__link {
    padding: 14px 16px;
    font-size: 1rem;
    color: var(--fg);
    background: var(--glass);
  }

  .site-nav__link:hover,
  .site-nav__link.is-active {
    background: rgba(var(--accent1), 0.12);
    color: rgb(var(--accent1));
  }

  body.nav-open {
    overflow: hidden;
  }
}

@media (max-width: 600px) {
  .section {
    padding: var(--space-xl) var(--space-sm);
  }

  .hero {
    padding-top: calc(var(--nav-height) + var(--space-lg));
  }

  .form-actions {
    flex-direction: column;
  }

  .form-actions .btn {
    width: 100%;
  }

  .trust-bar {
    flex-direction: column;
    gap: var(--space-xs);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

}