/* style.css — coreX IP Layer | SpaceX/Tesla Aesthetic */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Typography — clean geometric sans like SpaceX */
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Type Scale */
  --text-xs:   clamp(0.6875rem, 0.65rem + 0.2vw, 0.8125rem);
  --text-sm:   clamp(0.8125rem, 0.75rem + 0.3vw, 0.9375rem);
  --text-base: clamp(0.9375rem, 0.9rem  + 0.2vw, 1.0625rem);
  --text-lg:   clamp(1.0625rem, 0.95rem + 0.6vw, 1.375rem);
  --text-xl:   clamp(1.375rem,  1.1rem  + 1.1vw, 2rem);
  --text-2xl:  clamp(1.75rem,   1rem    + 2.5vw, 3.25rem);
  --text-3xl:  clamp(2.25rem,   0.8rem  + 4vw,   4.5rem);
  --text-hero: clamp(2.75rem,   0.5rem  + 6.5vw, 7rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Palette — Pure SpaceX: black, white, nothing else */
  --color-bg:          #000000;
  --color-surface:     #0a0a0a;
  --color-surface-2:   #111111;
  --color-border:      #1a1a1a;
  --color-border-light:#222222;

  --color-text:        #ffffff;
  --color-text-sec:    rgba(255,255,255,0.6);
  --color-text-tert:   rgba(255,255,255,0.35);

  /* No accent color — SpaceX uses only white on black */

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition: 180ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* ===== GLOBAL ===== */

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-weight: 400;
  letter-spacing: 0.01em;
}

a {
  color: var(--color-text);
  text-decoration: none;
}

a:hover {
  opacity: 0.7;
}

/* ===== CONTENT ABOVE PARTICLES ===== */

.nav, main, .footer, .legal {
  position: relative;
  z-index: 2;
}

/* ===== NAV ===== */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-6) clamp(var(--space-6), 5vw, var(--space-16));
  background: transparent;
  transition: background 500ms ease, backdrop-filter 500ms ease;
}

.nav--scrolled {
  background: rgba(0, 0, 0, 0.9);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.nav__logo svg {
  width: 28px;
  height: 32px;
}

.nav__wordmark {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-xs);
  letter-spacing: 0.35em;
  text-transform: none;
  color: var(--color-text);
}

.nav__links {
  display: flex;
  gap: var(--space-8);
  list-style: none;
}

.nav__links a {
  font-weight: 500;
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-text);
  text-decoration: none;
  opacity: 0.6;
  transition: opacity 300ms ease;
}

.nav__links a:hover {
  opacity: 1;
}

/* ===== HERO ===== */

.hero {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: var(--space-16) clamp(var(--space-6), 5vw, var(--space-16));
  position: relative;
  overflow: hidden;
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 700;
  line-height: 1.0;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: var(--space-8);
  max-width: 12ch;
}

.hero__subtitle {
  font-weight: 300;
  font-size: var(--text-base);
  color: var(--color-text-sec);
  max-width: 44ch;
  line-height: 1.7;
  letter-spacing: 0.02em;
}

.hero__footer {
  position: absolute;
  bottom: var(--space-8);
  left: clamp(var(--space-6), 5vw, var(--space-16));
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.hero__footer span {
  font-size: var(--text-xs);
  color: var(--color-text-tert);
  font-weight: 400;
  letter-spacing: 0.05em;
}

/* ===== SECTIONS ===== */

.section {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(var(--space-16), 10vw, var(--space-32)) clamp(var(--space-6), 5vw, var(--space-16));
  position: relative;
}

.section__eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-text-tert);
  margin-bottom: var(--space-6);
}

.section__headline {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: var(--color-text);
  max-width: 14ch;
  margin-bottom: var(--space-8);
}

.section__body {
  font-size: var(--text-base);
  color: var(--color-text-sec);
  max-width: 48ch;
  line-height: 1.7;
  font-weight: 300;
  letter-spacing: 0.02em;
}

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-12);
  margin-top: clamp(var(--space-12), 6vw, var(--space-24));
  max-width: 760px;
}

.stat__value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.stat__label {
  font-size: var(--text-xs);
  color: var(--color-text-tert);
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.03em;
  max-width: 20ch;
}

/* Framework List */
.framework-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-top: var(--space-10);
}

.framework-list li {
  font-size: var(--text-base);
  color: var(--color-text-sec);
  font-weight: 300;
  padding-left: var(--space-8);
  position: relative;
  letter-spacing: 0.02em;
}

.framework-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 16px;
  height: 1px;
  background: rgba(255,255,255,0.25);
}

/* Validation */
.validation {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-top: var(--space-10);
  max-width: 600px;
}

.validation__item {
  display: flex;
  align-items: baseline;
  gap: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.validation__item:last-child {
  border-bottom: none;
}

.validation__status {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  white-space: nowrap;
  min-width: 120px;
}

.validation__status--completed {
  color: var(--color-text);
}

.validation__status--progress {
  color: var(--color-text-sec);
}

.validation__status--pending {
  color: var(--color-text-tert);
}

.validation__desc {
  font-size: var(--text-sm);
  color: var(--color-text-sec);
  font-weight: 300;
  letter-spacing: 0.02em;
}

/* CTA */
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-12);
  padding: var(--space-3) var(--space-8);
  border: 1px solid rgba(255,255,255,0.3);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-decoration: none;
  transition: all 300ms var(--ease-out);
}

.cta-button:hover {
  background: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
  opacity: 1;
}

.cta-button svg {
  width: 14px;
  height: 14px;
  transition: transform 300ms var(--ease-out);
}

.cta-button:hover svg {
  transform: translateX(4px);
}

/* ===== LEGAL ===== */

.legal {
  min-height: 100dvh;
  padding: clamp(var(--space-16), 10vw, var(--space-32)) clamp(var(--space-6), 5vw, var(--space-16));
  padding-top: calc(var(--space-32) + var(--space-8));
}

.legal__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: var(--space-12);
}

.legal__content {
  max-width: 600px;
}

.legal__content h2 {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
}

.legal__content p {
  font-size: var(--text-base);
  color: var(--color-text-sec);
  font-weight: 300;
  line-height: 1.7;
  letter-spacing: 0.02em;
  margin-bottom: var(--space-4);
}

.legal__content strong {
  color: var(--color-text);
  font-weight: 500;
}

.legal__content a {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(255,255,255,0.3);
}

.legal__content a:hover {
  text-decoration-color: var(--color-text);
  opacity: 1;
}

/* ===== DIVIDER ===== */

.section__divider {
  width: 40px;
  height: 1px;
  background: rgba(255,255,255,0.2);
  margin: var(--space-12) 0;
}

/* ===== FOOTER ===== */

.footer {
  padding: var(--space-12) clamp(var(--space-6), 5vw, var(--space-16));
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer__left {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.footer__left span,
.footer__left a {
  font-size: var(--text-xs);
  color: var(--color-text-tert);
  font-weight: 400;
  letter-spacing: 0.03em;
}

.footer__left a:hover {
  color: var(--color-text-sec);
  opacity: 1;
}

.footer__links {
  display: flex;
  gap: var(--space-6);
}

.footer__links a {
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-tert);
  text-decoration: none;
  transition: color 180ms ease;
}

.footer__links a:hover {
  color: var(--color-text);
  opacity: 1;
}

/* ===== SCROLL REVEAL ===== */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 700ms var(--ease-out), transform 700ms var(--ease-out);
}

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

/* ===== MOBILE ===== */

@media (max-width: 768px) {
  .stats {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .validation__item {
    flex-direction: column;
    gap: var(--space-2);
  }

  .validation__status {
    min-width: auto;
  }

  .hero__title {
    max-width: 100%;
  }

  .nav__links {
    gap: var(--space-4);
  }

  .footer {
    flex-direction: column;
    align-items: flex-start;
  }
}