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

:root {
  --color-bg: #faf9fc;
  --color-bg-alt: #f1eef6;
  --color-surface: #ffffff;
  --color-border: #ddd6e8;
  --color-text: #1e1228;
  --color-text-muted: #6b5c7a;
  --color-accent: #8b3fa0;
  --color-accent-foreground: #ffffff;
  --color-accent-hover: #722f88;
  --color-accent-subtle: #f3e8f8;
  --color-secondary: #5b21b6;
  --color-secondary-subtle: #ede9fe;
  --color-card-shadow: rgba(80, 30, 100, 0.06);
  --font-sans: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --radius: 10px;
  --transition-speed: 0.25s;
}

[data-theme="dark"] {
  --color-bg: #110c18;
  --color-bg-alt: #1a1224;
  --color-surface: #211730;
  --color-border: #35284a;
  --color-text: #ece6f2;
  --color-text-muted: #a697b5;
  --color-accent: #c77ddb;
  --color-accent-hover: #daa0ec;
  --color-accent-btn: #a650c3;
  --color-accent-btn-hover: #9b41bb;
  --color-accent-foreground: #ffffff;
  --color-accent-hover: #daa0ec;
  --color-accent-subtle: #2d1640;
  --color-secondary: #7c3aed;
  --color-secondary-subtle: #2e1065;
  --color-card-shadow: rgba(0, 0, 0, 0.35);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  transition:
    background-color var(--transition-speed) ease,
    color var(--transition-speed) ease;
}

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-speed) ease;
}

.btn-accent {
  display: inline-block;
  background-color: var(--color-accent-btn, var(--color-accent));
  color: var(--color-accent-foreground);
  font-family: var(--font-sans);
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color var(--transition-speed) ease;
}

.btn-accent:hover {
  background-color: var(--color-accent-btn-hover, var(--color-accent-hover));
  color: var(--color-accent-foreground);
}

.btn-accent:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ---- Skip link ---- */

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 200;
  padding: 12px 24px;
  background-color: var(--color-accent);
  color: #ffffff;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 12px;
}

/* ---- Focus visible ---- */

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

/* ---- Reduced motion ---- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Header ---- */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-speed) ease;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.header__logo-img {
  width: 36px;
  height: 36px;
  object-fit: contain;
}

.header__links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header__nav-link {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 6px;
  border-radius: var(--radius);
  transition: color var(--transition-speed) ease;
}

.header__nav-link:hover {
  color: var(--color-accent);
}

.header__cta {
  padding: 7px 16px;
  font-size: 0.875rem;
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition:
    background-color var(--transition-speed) ease,
    border-color var(--transition-speed) ease;
}

.theme-toggle:hover {
  border-color: var(--color-accent);
}

.theme-toggle__icon--moon {
  display: none;
}

[data-theme="dark"] .theme-toggle__icon--sun {
  display: none;
}

[data-theme="dark"] .theme-toggle__icon--moon {
  display: block;
}

/* ---- Hero ---- */

.hero {
  padding: 100px 0 80px;
  text-align: center;
}

.hero__inner {
  max-width: 800px;
  margin: 0 auto;
}

.hero__mascot {
  width: 180px;
  height: auto;
  object-fit: contain;
  margin-bottom: 24px;
}

.hero__title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 24px;
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 40px;
}

.hero__cta-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero__cta {
  display: inline-block;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
  transition:
    background-color var(--transition-speed) ease,
    border-color var(--transition-speed) ease;
}

.hero__cta--primary {
  font-size: 1rem;
  border: 2px solid transparent;
}

.hero__cta--secondary {
  background-color: var(--color-surface);
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.hero__cta--secondary:hover {
  background-color: var(--color-accent-subtle);
}

/* ---- Features ---- */

.features {
  padding: 80px 0;
  background-color: var(--color-bg-alt);
  transition: background-color var(--transition-speed) ease;
}

.features__heading {
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 48px;
  letter-spacing: -0.02em;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: 0 2px 8px var(--color-card-shadow);
  transition:
    background-color var(--transition-speed) ease,
    border-color var(--transition-speed) ease,
    box-shadow var(--transition-speed) ease;
}

.card:hover {
  box-shadow: 0 4px 16px var(--color-card-shadow);
}

.card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
  margin-bottom: 20px;
}

.card__title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.card__text {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

#features,
#alpha,
#demo {
  scroll-margin-top: 64px;
}
/* ---- Alpha Signup ---- */

.alpha-signup {
  padding: 80px 0;
  background-color: var(--color-bg-alt);
  transition: background-color var(--transition-speed) ease;
}

.alpha-signup__inner {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.alpha-signup__heading {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.alpha-signup__text {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 8px;
}

.alpha-signup__subtext {
  font-size: 0.9rem;
  color: var(--color-accent);
  margin-bottom: 32px;
  font-weight: 600;
}

.alpha-signup__form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.alpha-signup__form-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.alpha-signup__input {
  padding: 14px 20px;
  font-size: 1rem;
  font-family: var(--font-sans);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  color: var(--color-text);
  transition:
    background-color var(--transition-speed) ease,
    border-color var(--transition-speed) ease;
}

.alpha-signup__input::placeholder {
  color: var(--color-text-muted);
}

.alpha-signup__input:hover,
.alpha-signup__input:focus {
  border-color: var(--color-accent);
  outline: none;
}

.alpha-signup__button {
  padding: 14px 32px;
  font-size: 1rem;
  border: none;
  transition:
    background-color var(--transition-speed) ease,
    transform var(--transition-speed) ease;
}

.alpha-signup__button:hover {
  transform: translateY(-2px);
}

.alpha-signup__button:active {
  transform: translateY(0);
}

.alpha-signup__button:disabled {
  transform: none;
}

.alpha-signup__message {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  min-height: 1.4em;
  margin-top: 8px;
}

.alpha-signup__message.success {
  color: var(--color-accent);
  font-weight: 600;
}

.alpha-signup__message.error {
  color: #d32f2f;
}

.alpha-signup__gdpr {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.5;
  margin-top: 4px;
}

/* ---- Demo ---- */

.demo {
  padding: 80px 0;
  transition: background-color var(--transition-speed) ease;
}

.demo__inner {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}

.demo__heading {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.demo__text {
  font-size: 1rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.demo__wallet {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.demo__connect-btn {
  padding: 12px 24px;
  font-size: 1rem;
  border: none;
}

.demo__info {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.demo__info p {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 4px 14px;
  white-space: nowrap;
}

.demo__info strong {
  color: var(--color-text);
}

.demo__status {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  min-height: 1.4em;
}

/* ---- Demo: Sign request ---- */

.demo__sign {
  width: 100%;
  text-align: left;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 2px 8px var(--color-card-shadow);
}

.demo__sign-heading {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--color-text);
}

.demo__sign-hint {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.demo__sign-row {
  display: flex;
  gap: 8px;
}

.demo__sign-input {
  flex: 1;
  padding: 11px 14px;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  color: var(--color-text);
  transition:
    border-color var(--transition-speed) ease,
    background-color var(--transition-speed) ease;
}

.demo__sign-input::placeholder {
  color: var(--color-text-muted);
}

.demo__sign-input:hover,
.demo__sign-input:focus {
  border-color: var(--color-accent);
  outline: none;
}

.demo__sign-btn {
  padding: 11px 20px;
  font-size: 0.95rem;
  border: none;
  white-space: nowrap;
}

.demo__sign-status {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  min-height: 1.4em;
  margin-top: 10px;
}

.demo__sign-status--success {
  color: var(--color-accent);
  font-weight: 600;
}

.demo__sign-result {
  margin-top: 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: left;
  transition:
    background-color var(--transition-speed) ease,
    border-color var(--transition-speed) ease;
}

.demo__sign-result-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.demo__sign-result-code {
  display: block;
  font-size: 0.72rem;
  font-family: "SF Mono", "Fira Code", "Fira Mono", monospace;
  word-break: break-all;
  color: var(--color-text);
  line-height: 1.6;
}

.demo__delegate-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.demo__delegate-warning {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.demo__tx-link[hidden] {
  display: none;
}

.demo__tx-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-speed) ease;
}

.demo__tx-link:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* ---- Footer ---- */

.footer {
  border-top: 1px solid var(--color-border);
  padding: 32px 0;
  transition: border-color var(--transition-speed) ease;
}

.footer__inner {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  display: flex;
  flex-direction: row;
  gap: 32px;
  align-items: center;
  justify-content: space-between;
}

.footer__left {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: flex-start;
}

.footer__social {
  display: flex;
  flex-direction: row;
  gap: 20px;
  align-items: center;
}

.footer__legal {
  display: flex;
  flex-direction: row;
  gap: 16px;
  align-items: center;
  font-size: 0.8rem;
}

.footer__right {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: flex-end;
  text-align: right;
}

.footer__links {
  display: flex;
  gap: 20px;
  align-items: center;
  justify-content: center;
}

.footer__links a {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: color var(--transition-speed) ease;
}

.footer__links a:hover {
  color: var(--color-accent-hover);
}

.footer__left a {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: color var(--transition-speed) ease;
}

.footer__left a:hover {
  color: var(--color-accent-hover);
}

.footer__powered {
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer__powered a {
  color: var(--color-accent);
  text-decoration: none;
  font-weight: 600;
  display: flex;
  align-items: center;
}

.footer__powered a svg {
  width: 55px;
  height: 10px;
}

.footer__powered a:hover {
  text-decoration: underline;
}

/* ---- Responsive ---- */

@media (max-width: 640px) {
  .header__cta {
    .desktop {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px; /* removes the 1px footprint */
      overflow: hidden;
      clip: rect(0, 0, 0, 0); /* Fallback for older browsers */
      white-space: nowrap; /* prevents accidental line breaks */
      border: 0;
    }
    padding: 4px 10px;
  }
  .header__nav-link {
    display: none;
  }

  .header__inner {
    height: 56px;
    gap: 8px;
  }

  .header__logo {
    font-size: 1rem;
    gap: 8px;
  }

  .header__logo-img {
    width: 28px;
    height: 28px;
  }

  .header__links {
    gap: 8px;
  }

  .theme-toggle {
    width: 36px;
    height: 36px;
  }

  .hero {
    padding: 64px 0 48px;
  }

  #features,
  #alpha,
  #demo {
    scroll-margin-top: 56px;
    padding: 56px 0;
  }

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

  .alpha-signup__heading {
    font-size: 1.5rem;
  }

  .alpha-signup__text {
    font-size: 1rem;
  }

  .alpha-signup__form-group {
    flex-direction: column;
  }

  .demo__sign-row {
    flex-direction: column;
  }

  .demo__sign-btn {
    width: 100%;
  }

  .footer__inner {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  .footer__left,
  .footer__right {
    align-items: center;
    text-align: center;
    flex-direction: column;
  }

  .footer__links {
    flex-wrap: wrap;
    justify-content: center;
  }
}