/* ================================================================
 * SPHERE DEX Landing Page Styles
 * Uses design tokens from ../assets/sphere-theme.css
 * ================================================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  background: #0a0e28;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
  text-decoration: none;
}

/* === Language Toggle ============================================= */
.lang-ja .en { display: none !important; }
.lang-en .ja { display: none !important; }

/* === Layout ====================================================== */
.lp-container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* === Header ====================================================== */
.lp-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 14, 40, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--sd-edge);
}

.lp-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.lp-header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lp-header__logo-img {
  height: 40px;
  width: auto;
}

.lp-header__subtitle {
  font-family: var(--sd-font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--sd-ink-mute);
  text-transform: uppercase;
}

.lp-header__nav {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lp-header__link {
  color: var(--sd-ink-dim);
  transition: color 0.2s;
  display: flex;
  align-items: center;
}

.lp-header__link:hover {
  color: var(--sd-elec);
}

.lp-header__cta {
  font-size: 12px;
  padding: 8px 18px;
}

.lp-lang-toggle {
  font-size: 10px;
  padding: 4px 10px;
  cursor: pointer;
}

/* === Hero ======================================================== */
.lp-hero {
  padding: 120px 0 56px;
  position: relative;
}

.lp-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 60% 50% at 20% 30%, rgba(77, 183, 255, 0.08), transparent),
    radial-gradient(ellipse 50% 40% at 80% 60%, rgba(255, 77, 166, 0.06), transparent);
}

.lp-hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
}

/* Gradient text */
.lp-gradient-text {
  background: linear-gradient(135deg, var(--sd-elec), var(--sd-magenta));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lp-hero__heading {
  font-size: 52px;
  line-height: 1.3;
  letter-spacing: -1px;
  margin-bottom: 24px;
}

.lp-hero__sub {
  font-size: 18px;
  line-height: 1.7;
  color: var(--sd-ink-dim);
  margin-bottom: 20px;
}

.lp-hero__desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--sd-ink-dim);
  margin-bottom: 36px;
}

.lp-hero__actions {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}

.lp-hero__cta-primary {
  font-size: 14px;
  padding: 12px 28px;
  border-radius: 8px;
}

.lp-hero__cta-secondary {
  font-size: 11px;
  padding: 10px 20px;
}

/* Badges */
.lp-hero__badges {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
}

.lp-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--sd-edge);
  font-family: var(--sd-font-mono);
  font-size: 11px;
  color: var(--sd-ink-dim);
  letter-spacing: 0.3px;
}

.lp-hero__note {
  font-family: var(--sd-font-mono);
  font-size: 11px;
  letter-spacing: 0.5px;
}

/* Screenshot */
.lp-hero__screenshot-wrap {
  padding: 8px;
  border-radius: 12px;
  overflow: hidden;
}

.lp-hero__screenshot {
  border-radius: 6px;
  width: 100%;
}

/* === Section Title =============================================== */
.lp-section-title {
  font-size: 26px;
  text-align: center;
  margin-bottom: 36px;
  letter-spacing: -0.3px;
}

/* === Features ==================================================== */
.lp-features {
  padding: 56px 0;
}

.lp-features__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.lp-feature-card {
  padding: 28px 24px 32px;
  text-align: center;
  transition: box-shadow 0.25s;
  display: flex;
  flex-direction: column;
}

.lp-feature-card:hover {
  box-shadow:
    0 10px 40px rgba(0, 0, 0, 0.4),
    0 0 0 1px rgba(77, 183, 255, 0.15);
}

.lp-feature-card__icon {
  margin-bottom: 20px;
  display: flex;
  justify-content: center;
}

.lp-feature-card__icon svg {
  width: 44px;
  height: 44px;
}

.lp-feature-card__logo {
  display: block;
  margin: 0 auto;
  width: 48px !important;
  height: 48px !important;
}

.lp-feature-card__screenshot {
  margin-top: auto;
  padding-top: 16px;
}

.lp-feature-card__img {
  width: 100%;
  display: block;
  border-radius: 8px;
  box-shadow:
    0 4px 16px rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(140, 200, 255, 0.1);
}

.lp-feature-card__title {
  font-size: 16px;
  margin-bottom: 14px;
}

.lp-feature-card__desc {
  font-size: 13px;
  line-height: 1.7;
}

/* === Trust ======================================================= */
.lp-trust {
  padding: 48px 0;
  position: relative;
}

.lp-trust::before {
  content: "";
  position: absolute;
  inset: -40px 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 70% 60% at 50% 50%, rgba(77, 183, 255, 0.06), transparent),
    radial-gradient(ellipse 50% 50% at 30% 40%, rgba(255, 77, 166, 0.04), transparent),
    radial-gradient(ellipse 40% 40% at 70% 60%, rgba(255, 205, 94, 0.03), transparent);
  z-index: 0;
}

.lp-trust__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  position: relative;
  z-index: 1;
}

.lp-trust__card {
  padding: 32px 28px;
  background: linear-gradient(135deg, rgba(14, 20, 50, 0.85), rgba(10, 14, 40, 0.7));
}

.lp-trust__title {
  font-size: 18px;
  margin-bottom: 12px;
}

.lp-trust__desc {
  font-size: 14px;
  line-height: 1.8;
}

/* === Bottom CTA ================================================== */
.lp-bottom-cta {
  padding: 56px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.lp-stage-floor {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 320px;
  pointer-events: none;
  background:
    radial-gradient(ellipse 900px 300px at 50% 100%,
      rgba(77, 183, 255, 0.25) 0%,
      rgba(255, 77, 166, 0.12) 50%,
      transparent 100%);
  z-index: 0;
}

.lp-bottom-cta__inner {
  position: relative;
  z-index: 1;
}

.lp-bottom-cta__heading {
  font-size: 26px;
  margin-bottom: 24px;
}

.lp-bottom-cta__btn {
  font-size: 15px;
  padding: 14px 36px;
  border-radius: 8px;
  display: inline-block;
  margin-bottom: 32px;
}

.lp-bottom-cta__links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.lp-bottom-cta__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  transition: color 0.2s;
}

.lp-bottom-cta__link:hover {
  color: var(--sd-elec);
}

/* === Footer ====================================================== */
.lp-footer {
  padding: 40px 0;
  border-top: 1px solid var(--sd-edge);
  text-align: center;
}

.lp-footer__disclaimer {
  font-size: 12px;
  line-height: 1.7;
  margin-bottom: 12px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.lp-footer__copy {
  font-family: var(--sd-font-mono);
  font-size: 11px;
  letter-spacing: 1px;
}

/* === Responsive ================================================== */
@media (max-width: 900px) {
  .lp-hero__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .lp-hero__heading {
    font-size: 38px;
  }

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

  .lp-trust__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .lp-header__subtitle {
    display: none;
  }

  .lp-header__nav {
    gap: 10px;
  }

  .lp-hero {
    padding: 100px 0 60px;
  }

  .lp-hero__heading {
    font-size: 32px;
  }

  .lp-hero__actions {
    flex-direction: column;
  }

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

  .lp-features__grid {
    grid-template-columns: 1fr;
  }

  .lp-bottom-cta__heading {
    font-size: 22px;
  }
}