/* Teslacom theme — dark, minimal, Neuralink-inspired motion */

:root {
  --color-bg: #0a0a0a;
  --color-surface: #141414;
  --color-text: #f5f5f5;
  --color-muted: #a3a3a3;
  --color-accent: #e8e8e8;
  --color-border: rgba(255, 255, 255, 0.12);
  --color-focus: #ffffff;

  --font-sans: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 3rem;
  --space-xl: 6rem;

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --duration-fast: 200ms;
  --duration-med: 600ms;
  --duration-slow: 1.2s;

  --container: min(1120px, 92vw);
  --header-h: 4.5rem;
}

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

html {
  scroll-behavior: smooth;
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

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

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  z-index: 1000;
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-text);
  color: var(--color-bg);
  text-decoration: none;
  border-radius: 4px;
}

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

/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  background: linear-gradient(to bottom, rgba(10, 10, 10, 0.9), transparent);
  backdrop-filter: blur(8px);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: var(--container);
  margin-inline: auto;
}

.site-logo {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
}

.site-nav ul {
  display: flex;
  gap: var(--space-md);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-trigger {
  padding: var(--space-xs) 0;
  color: var(--color-muted);
  transition: color var(--duration-fast) var(--ease-out);
}

.nav-trigger:hover,
.nav-trigger:focus-visible {
  color: var(--color-text);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  border-radius: 999px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition:
    background var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out),
    border-color var(--duration-fast) var(--ease-out),
    transform var(--duration-fast) var(--ease-out);
}

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

.btn--primary {
  background: var(--color-text);
  color: var(--color-bg);
}

.btn--primary:hover {
  transform: translateY(-1px);
  background: var(--color-accent);
}

.btn--ghost {
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn--ghost:hover {
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.04);
}

.btn--text {
  padding: 0;
  color: var(--color-muted);
  text-decoration: underline;
  text-underline-offset: 0.25em;
}

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

.btn--sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* Hero — central homepage content */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-block: calc(var(--header-h) + var(--space-lg)) var(--space-xl);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero__gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(255, 255, 255, 0.06), transparent 70%),
    radial-gradient(circle at 80% 60%, rgba(255, 255, 255, 0.03), transparent 50%);
  animation: hero-breathe 8s ease-in-out infinite alternate;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black, transparent);
  opacity: 0.5;
}

@keyframes hero-breathe {
  from { opacity: 0.7; transform: scale(1); }
  to { opacity: 1; transform: scale(1.02); }
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 48rem;
}

.hero__eyebrow {
  margin: 0 0 var(--space-md);
  font-size: 0.875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.hero__title {
  margin: 0 0 var(--space-md);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.hero__accent {
  display: inline-block;
  background: linear-gradient(90deg, #fff 0%, #999 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__lede {
  margin: 0 0 var(--space-lg);
  max-width: 36rem;
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--color-muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.hero__scroll-hint {
  position: absolute;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
}

.hero__scroll-line {
  display: block;
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, transparent, var(--color-muted));
  animation: scroll-pulse 2s var(--ease-out) infinite;
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity var(--duration-med) var(--ease-out),
    transform var(--duration-med) var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal:nth-child(2) { transition-delay: 80ms; }
.reveal:nth-child(3) { transition-delay: 160ms; }
.reveal:nth-child(4) { transition-delay: 240ms; }
.reveal:nth-child(5) { transition-delay: 320ms; }

/* Feature block */
.feature-block {
  padding-block: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.feature-block__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.feature-block__title {
  margin: 0 0 var(--space-md);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.feature-block__cursor {
  animation: blink 1s step-end infinite;
  color: var(--color-muted);
}

@keyframes blink {
  50% { opacity: 0; }
}

.feature-block__text {
  margin: 0 0 var(--space-md);
  color: var(--color-muted);
  max-width: 32rem;
}

.feature-block__visual {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 280px;
}

.feature-block__orb {
  position: relative;
  width: 200px;
  height: 200px;
}

.feature-block__ring {
  position: absolute;
  inset: 0;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  animation: ring-spin 12s linear infinite;
}

.feature-block__ring--2 {
  inset: 20%;
  animation-duration: 18s;
  animation-direction: reverse;
}

.feature-block__ring--3 {
  inset: 40%;
  animation-duration: 24s;
}

@keyframes ring-spin {
  to { transform: rotate(360deg); }
}

/* Pioneers */
.pioneers {
  padding-block: var(--space-xl);
}

.section-title {
  margin: 0 0 var(--space-lg);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 500;
}

.pioneers__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.pioneer-card {
  padding: var(--space-md);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  transition: border-color var(--duration-fast) var(--ease-out);
}

.pioneer-card:hover {
  border-color: rgba(255, 255, 255, 0.25);
}

.pioneer-card__quote {
  margin: 0 0 var(--space-sm);
  font-size: 1.125rem;
  font-style: italic;
  line-height: 1.4;
}

.pioneer-card__name {
  margin: 0 0 var(--space-sm);
  color: var(--color-muted);
  font-size: 0.875rem;
}

.pioneers__cta {
  text-align: center;
}

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

.site-footer__inner {
  display: grid;
  gap: var(--space-sm);
  text-align: center;
}

.site-footer__brand {
  margin: 0;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-footer__nav ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-link {
  color: var(--color-muted);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--color-text);
}

.site-footer__contact {
  margin: 0;
  color: var(--color-muted);
}

.site-footer__contact a {
  color: var(--color-text);
}

.site-footer__copy {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-muted);
}

/* Dialogs */
.content-dialog {
  width: min(520px, 92vw);
  max-height: 85vh;
  padding: 0;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.6);
}

.content-dialog::backdrop {
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(4px);
}

.content-dialog__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-md) 0;
}

.content-dialog__header h2 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 500;
}

.content-dialog__close {
  flex-shrink: 0;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-muted);
  transition: background var(--duration-fast), color var(--duration-fast);
}

.content-dialog__close:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text);
}

.content-dialog__body {
  padding: var(--space-sm) var(--space-md) var(--space-md);
  overflow-y: auto;
}

.content-dialog__body p {
  margin: 0 0 var(--space-sm);
  color: var(--color-muted);
}

.content-dialog__body ul {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--color-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .site-nav {
    display: none;
  }

  .feature-block__inner {
    grid-template-columns: 1fr;
  }

  .feature-block__visual {
    order: -1;
    min-height: 200px;
  }

  .pioneers__grid {
    grid-template-columns: 1fr;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }
}