/* ─────────────────────────────────────────────
   Design Tokens
───────────────────────────────────────────── */
:root {
  --color-bg-start:        #050510;
  --color-bg-end:          #0D1B2A;
  --color-blue:            #4F8EF7;
  --color-purple:          #A78BFA;
  --color-white:           #FFFFFF;
  --color-muted:           rgba(255, 255, 255, 0.55);
  --color-dimmed:          rgba(255, 255, 255, 0.30);
  --color-card-bg:         rgba(255, 255, 255, 0.04);
  --color-card-border:     rgba(255, 255, 255, 0.08);
  --color-card-hover:      rgba(79, 142, 247, 0.35);

  --font:                  'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width:             1160px;
  --section-gap:           128px;
  --nav-height:            72px;
  --radius-card:           18px;
  --radius-btn:            10px;

  --transition-fast:       0.18s ease;
  --transition-med:        0.28s ease;
}

/* ─────────────────────────────────────────────
   Reset
───────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: linear-gradient(140deg, var(--color-bg-start) 0%, var(--color-bg-end) 100%);
  background-attachment: fixed;
  color: var(--color-white);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

img, svg { display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: var(--font); cursor: pointer; border: none; background: none; }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ─────────────────────────────────────────────
   Ambient Background
───────────────────────────────────────────── */
.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(130px);
  pointer-events: none;
  z-index: 0;
  will-change: transform;
}

.bg-orb--blue {
  width: 700px;
  height: 700px;
  background: var(--color-blue);
  top: -180px;
  left: -240px;
  opacity: 0.10;
  animation: floatOrbA 22s ease-in-out infinite;
}

.bg-orb--purple {
  width: 600px;
  height: 600px;
  background: var(--color-purple);
  bottom: -160px;
  right: -180px;
  opacity: 0.10;
  animation: floatOrbB 28s ease-in-out infinite;
}

@keyframes floatOrbA {
  0%, 100% { transform: translate(0px,   0px); }
  33%       { transform: translate(40px, -50px); }
  66%       { transform: translate(-20px, 30px); }
}

@keyframes floatOrbB {
  0%, 100% { transform: translate(0px,  0px); }
  33%       { transform: translate(-30px, 40px); }
  66%       { transform: translate(20px, -25px); }
}

/* Grain texture */
.noise-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 300px 300px;
}

/* ─────────────────────────────────────────────
   Layout
───────────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 28px;
}

/* ─────────────────────────────────────────────
   Navigation
───────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 100;
  transition: background var(--transition-med), border-bottom var(--transition-med);
}

.nav.scrolled {
  background: rgba(5, 5, 16, 0.75);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--color-card-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 0;
}

.nav__logo {
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -0.6px;
  background: linear-gradient(90deg, var(--color-blue), var(--color-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
}

.nav__logo:hover { opacity: 0.85; }

.nav__links {
  display: flex;
  gap: 36px;
  margin-left: auto;
  margin-right: 32px;
}

.nav__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-muted);
  position: relative;
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--color-blue), var(--color-purple));
  transition: width 0.24s ease;
}

.nav__link:hover { color: var(--color-white); }
.nav__link:hover::after { width: 100%; }

.nav__cta { flex-shrink: 0; }

/* ─────────────────────────────────────────────
   Buttons
───────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: all var(--transition-fast);
  white-space: nowrap;
  line-height: 1;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-blue) 0%, var(--color-purple) 100%);
  color: var(--color-white);
  box-shadow: 0 0 0 0 rgba(79, 142, 247, 0);
}

.btn--primary:hover {
  box-shadow:
    0 0 28px rgba(79, 142, 247, 0.45),
    0 0 60px rgba(167, 139, 250, 0.20);
  transform: translateY(-1px);
  filter: brightness(1.08);
}

.btn--primary:active { transform: translateY(0); filter: brightness(1); }

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

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

.btn--lg {
  padding: 15px 30px;
  font-size: 16px;
  border-radius: 12px;
}

.btn--form {
  padding: 15px 28px;
  font-size: 15px;
  border-radius: 10px;
  flex-shrink: 0;
}

.btn--form.loading { pointer-events: none; opacity: 0.7; }

.btn-label  { display: block; }
.btn-loading { display: none; }
.btn--form.loading .btn-label   { display: none; }
.btn--form.loading .btn-loading { display: block; }

.arrow {
  display: inline-block;
  transition: transform var(--transition-fast);
}
.btn--ghost:hover .arrow { transform: translateX(5px); }

/* ─────────────────────────────────────────────
   Badge / Label
───────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid rgba(79, 142, 247, 0.45);
  color: var(--color-blue);
  background: rgba(79, 142, 247, 0.08);
  margin-bottom: 28px;
}

.label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-blue);
  margin-bottom: 18px;
}

/* ─────────────────────────────────────────────
   Hero
───────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  z-index: 2;
  overflow: hidden;
}

.hero__inner {
  padding-top: 80px;
  padding-bottom: 100px;
}

/* Dot-grid overlay */
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(79, 142, 247, 0.18) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
  pointer-events: none;
}

.hero__content {
  max-width: 740px;
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

.hero__content.loaded {
  opacity: 1;
  transform: translateY(0);
}

.hero__headline {
  font-size: clamp(54px, 8.5vw, 100px);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -3px;
  background: linear-gradient(140deg, #FFFFFF 10%, var(--color-blue) 55%, var(--color-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 28px;
  padding-bottom: 4px;
}

.hero__subheadline {
  font-size: 19px;
  font-weight: 400;
  color: var(--color-muted);
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: 44px;
}

.hero__ctas {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

/* ─────────────────────────────────────────────
   Section Common
───────────────────────────────────────────── */
.section {
  position: relative;
  z-index: 2;
  padding: var(--section-gap) 0;
}

.section__header {
  text-align: center;
  margin-bottom: 72px;
}

.section__header .label { display: inline-block; margin-bottom: 18px; }

.section__headline {
  font-size: clamp(34px, 4.5vw, 54px);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
}

.section__subtext {
  font-size: 18px;
  color: var(--color-muted);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ─────────────────────────────────────────────
   Feature Cards
───────────────────────────────────────────── */
.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-card);
  padding: 40px 36px;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition:
    border-color var(--transition-med),
    box-shadow var(--transition-med),
    transform var(--transition-med);
}

.card:hover {
  border-color: var(--color-card-hover);
  box-shadow:
    0 0 40px rgba(79, 142, 247, 0.08),
    0 8px 40px rgba(0, 0, 0, 0.35),
    inset 0 0 0 1px rgba(79, 142, 247, 0.08);
  transform: translateY(-5px);
}

.card__icon {
  width: 54px;
  height: 54px;
  background: rgba(79, 142, 247, 0.07);
  border: 1px solid rgba(79, 142, 247, 0.18);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 26px;
}

.card__title {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.4px;
  margin-bottom: 12px;
}

.card__text {
  font-size: 16px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* ─────────────────────────────────────────────
   Use Cases
───────────────────────────────────────────── */
.use-cases {
  border-top: 1px solid var(--color-card-border);
}

.use-cases__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.tag--blue   { color: #4F8EF7; background: rgba(79,142,247,0.10);  border: 1px solid rgba(79,142,247,0.25); }
.tag--purple { color: #A78BFA; background: rgba(167,139,250,0.10); border: 1px solid rgba(167,139,250,0.25); }
.tag--cyan   { color: #38BDF8; background: rgba(56,189,248,0.10);  border: 1px solid rgba(56,189,248,0.25); }

/* ─────────────────────────────────────────────
   How It Works
───────────────────────────────────────────── */
.how-it-works {
  border-top: 1px solid var(--color-card-border);
}

.steps {
  max-width: 700px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 44px;
  padding: 44px 0;
  border-bottom: 1px solid var(--color-card-border);
  align-items: flex-start;
}

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

.step__number {
  font-size: 52px;
  font-weight: 800;
  letter-spacing: -3px;
  line-height: 1;
  background: linear-gradient(135deg, var(--color-blue), var(--color-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0;
  width: 80px;
  opacity: 0.55;
  padding-top: 2px;
}

.step__title {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.4px;
  margin-bottom: 12px;
}

.step__text {
  font-size: 16px;
  color: var(--color-muted);
  line-height: 1.7;
}

/* ─────────────────────────────────────────────
   Waitlist
───────────────────────────────────────────── */
.waitlist {
  border-top: 1px solid var(--color-card-border);
}

.waitlist__inner {
  text-align: center;
  max-width: 580px;
  margin: 0 auto;
}

.waitlist__subtext {
  font-size: 18px;
  color: var(--color-muted);
  margin-top: 16px;
  margin-bottom: 44px;
  line-height: 1.65;
}

.waitlist__form {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
}

.form__row {
  display: flex;
  gap: 12px;
  width: 100%;
}

.form__input {
  flex: 1;
  padding: 15px 20px;
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: 10px;
  font-family: var(--font);
  font-size: 15px;
  color: var(--color-white);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  backdrop-filter: blur(14px);
}

.form__input::placeholder { color: var(--color-dimmed); }

.form__input:focus {
  border-color: rgba(79, 142, 247, 0.55);
  box-shadow: 0 0 0 3px rgba(79, 142, 247, 0.12);
}

.form__success {
  font-size: 15px;
  color: var(--color-blue);
  font-weight: 500;
  display: none;
}
.form__success.visible { display: block; }

.form__error {
  font-size: 14px;
  color: #FF6B6B;
  display: none;
}
.form__error.visible { display: block; }

/* ─────────────────────────────────────────────
   Footer
───────────────────────────────────────────── */
.footer {
  position: relative;
  z-index: 2;
  padding: 64px 0;
  border-top: 1px solid var(--color-card-border);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
}

.footer__logo {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(90deg, var(--color-blue), var(--color-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: opacity var(--transition-fast);
}
.footer__logo:hover { opacity: 0.75; }

.footer__tagline {
  font-size: 15px;
  color: var(--color-muted);
}

.footer__copy {
  font-size: 13px;
  color: var(--color-dimmed);
}

/* ─────────────────────────────────────────────
   Scroll Animations
───────────────────────────────────────────── */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity  0.65s cubic-bezier(0.22, 1, 0.36, 1) var(--delay, 0s),
    transform 0.65s cubic-bezier(0.22, 1, 0.36, 1) var(--delay, 0s);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─────────────────────────────────────────────
   Responsive
───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .features__grid,
  .use-cases__grid { grid-template-columns: repeat(2, 1fr); }
  .nav__links { gap: 20px; }
}

@media (max-width: 768px) {
  :root {
    --section-gap: 88px;
  }

  .nav__links { display: none; }
  .nav__cta { margin-left: auto; }
  .nav__inner { gap: 12px; }

  .hero__subheadline { font-size: 17px; }
  .hero__headline { letter-spacing: -2px; }

  .features__grid,
  .use-cases__grid { grid-template-columns: 1fr; }

  .step { gap: 24px; }
  .step__number { font-size: 38px; width: 60px; letter-spacing: -2px; }

  .form__row { flex-direction: column; }
  .btn--form { width: 100%; }

  .section__header { margin-bottom: 52px; }
}

@media (max-width: 480px) {
  .hero__ctas { flex-direction: column; align-items: stretch; }
  .btn--lg { width: 100%; }
  .hero__headline { font-size: clamp(40px, 11vw, 54px); letter-spacing: -1.5px; }
  .section__headline { letter-spacing: -1px; }

  .card { padding: 30px 24px; }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .bg-orb { animation: none; }
  .hero__content,
  .animate-on-scroll {
    transition: opacity 0.3s ease;
    transform: none !important;
  }
}