/* Design tokens */
:root {
  --color-brand-primary: #3b5bf5;
  --color-glass-surface: rgba(255, 255, 255, 0.12);
  --color-glass-surface-hover: rgba(255, 255, 255, 0.22);
  --color-glass-border: rgba(255, 255, 255, 0.22);
  --color-glass-border-strong: rgba(255, 255, 255, 0.38);

  --color-text-primary: #ffffff;
  --color-text-secondary: rgba(255, 255, 255, 0.88);
  --color-text-muted: rgba(255, 255, 255, 0.68);
  --color-text-dim: rgba(255, 255, 255, 0.48);

  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.6);

  --radius-pill: 9999px;
  --radius-dropdown: 14px;
  --radius-item: 8px;

  --transition-fast: 150ms cubic-bezier(0.19, 1, 0.22, 1);
  --transition-smooth: 220ms cubic-bezier(0.19, 1, 0.22, 1);
}

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

html {
  font-family: var(--font-sans);
  color: var(--color-text-primary);
  background-color: #0b070f;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  height: 100%;
}

body {
  min-height: 100%;
  position: relative;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

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

:focus-visible {
  outline: 2px solid #8ba4ff;
  outline-offset: 3px;
}

/* Background image layer */
.hero-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('hero.webp');
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  z-index: 0;
}

/* Contrast gradient overlay */
.hero-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    180deg,
    rgba(12, 6, 14, 0.42) 0%,
    rgba(12, 6, 14, 0.15) 30%,
    rgba(12, 6, 14, 0.28) 65%,
    rgba(8, 4, 10, 0.70) 100%
  );
  z-index: 1;
  pointer-events: none;
}

/* Header */
.site-header {
  position: relative;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 22px 36px;
}

.header-container {
  max-width: 1320px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: 100%;
}

/* Left: Pure Typography Logo */
.brand-logo {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--color-text-primary);
  transition: opacity var(--transition-fast);
}

.brand-logo:hover {
  opacity: 0.85;
}

.brand-text {
  font-size: 1.18rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #ffffff;
}

/* Center: Perfectly Centered Desktop Menu */
.main-nav {
  justify-self: center;
  display: flex;
  align-items: center;
}

.nav-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 32px;
}

.nav-item {
  position: relative;
}

.nav-link {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  font-family: inherit;
  font-size: 0.925rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 4px;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text-primary);
}

.chevron-icon {
  transition: transform var(--transition-smooth);
}

.dropdown-toggle[aria-expanded="true"] .chevron-icon {
  transform: rotate(180deg);
}

/* Dropdown navigation styles are handled exclusively by nav-shell.css */

/* Right: Header Actions */
.header-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-text {
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-family: inherit;
  font-size: 0.925rem;
  font-weight: 500;
  cursor: pointer;
  padding: 8px 12px;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.btn-text:hover {
  opacity: 0.8;
}

/* Pixel-centered Glass Action Button with Copy Feedback */
.btn-glass-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 20px;
  line-height: 1;
  background: rgba(255, 255, 255, 0.10);
  border: 1px solid rgba(255, 255, 255, 0.24);
  color: #ffffff;
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  cursor: pointer;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  text-decoration: none !important;
  transform: none !important;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
}

.btn-glass-action:hover {
  background: rgba(255, 255, 255, 0.20);
  border-color: rgba(255, 255, 255, 0.42);
  transform: none !important;
  text-decoration: none !important;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
  color: #ffffff;
}

.btn-glass-action:active {
  transform: none !important;
  text-decoration: none !important;
  background: rgba(255, 255, 255, 0.15);
}

.btn-glass-action:focus,
.btn-glass-action:visited {
  text-decoration: none !important;
  color: #ffffff;
}

/* Copied state for header button */
.btn-glass-action.is-copied {
  background: rgba(15, 80, 40, 0.45);
  border-color: rgba(100, 255, 150, 0.4);
  color: #a8f5c4;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  color: #ffffff;
}

.mobile-menu-toggle .bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #ffffff;
  border-radius: 2px;
  transition: transform var(--transition-smooth), opacity var(--transition-smooth);
}

.mobile-menu-toggle.is-active .bar:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}

.mobile-menu-toggle.is-active .bar:nth-child(2) {
  transform: translateY(-4px) rotate(-45deg);
}

/* Hero section */
.hero-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 72px 24px 72px;
  box-sizing: border-box;
  text-align: center;
  position: relative;
  z-index: 10;
}

.hero-content {
  max-width: 860px;
  margin: auto 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}


.hero-title {
  font-size: clamp(2.4rem, 5.2vw, 4.25rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.035em;
  color: #ffffff;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.9vw, 1.25rem);
  font-weight: 400;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.92);
  max-width: 660px;
  margin-bottom: 36px;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.45);
}

.footnote-ref {
  font-size: 0.72em;
  vertical-align: super;
  line-height: 0;
  margin-left: 1px;
}

/* Install pill */
.hero-signup-form {
  width: 100%;
  max-width: 440px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  margin-bottom: 34px;
}

.form-pill-container {
  width: 100%;
  display: flex;
  align-items: center;
  padding: 5px 6px 5px 22px;
  border-radius: var(--radius-pill);
  background: var(--color-glass-surface);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--color-glass-border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  transition: border-color var(--transition-smooth), box-shadow var(--transition-smooth), background-color var(--transition-smooth);
}

.form-pill-container:focus-within {
  border-color: rgba(255, 255, 255, 0.45);
  background: rgba(255, 255, 255, 0.16);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.45);
}

.email-input {
  flex: 1;
  background: transparent;
  border: none;
  color: #ffffff;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9375rem;
  font-weight: 500;
  min-width: 0;
  letter-spacing: 0.02em;
}

.email-input::placeholder {
  color: rgba(255, 255, 255, 0.65);
}

.email-input:focus {
  outline: none;
}

/* Copy button */
.btn-icon-copy {
  position: relative;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.75);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  outline: none;
  padding: 0;
  margin-right: 4px;
  transition: opacity 150ms ease-out, transform 150ms ease-out, color 150ms ease-out;
}

.btn-icon-copy:hover {
  background: transparent;
  border: none;
  color: #ffffff;
  opacity: 0.95;
}

.btn-icon-copy:active {
  transform: scale(0.92);
}

.btn-icon-copy .icon-copy {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.75);
  transform: scale(1);
  opacity: 1;
  filter: blur(0);
  transition: transform 200ms ease-out, opacity 200ms ease-out, filter 200ms ease-out;
  pointer-events: none;
}

.btn-icon-copy .icon-check {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #34d399;
  transform: scale(0.7);
  opacity: 0;
  filter: blur(2px);
  transition: transform 200ms ease-out, opacity 200ms ease-out, filter 200ms ease-out;
  pointer-events: none;
}

.btn-icon-copy.is-copied {
  background: transparent;
  border: none;
}

.btn-icon-copy.is-copied .icon-check {
  transform: scale(1);
  opacity: 1;
  filter: blur(0);
}

.btn-icon-copy.is-copied .icon-copy {
  transform: scale(0);
  opacity: 0;
  filter: blur(2px);
}

.btn-loader {
  display: none;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.btn-icon-copy.is-loading .icon-copy,
.btn-icon-copy.is-loading .icon-check {
  display: none;
}

.btn-icon-copy.is-loading .btn-loader {
  display: block;
}

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

.form-message {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  margin-top: 10px;
  font-size: 0.84rem;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
  max-width: 90vw;
  text-align: center;
  transition: opacity var(--transition-smooth), transform var(--transition-smooth);
}

.form-message.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

.form-message.is-error {
  color: #ff9999;
  background: rgba(180, 20, 20, 0.45);
  border: 1px solid rgba(255, 100, 100, 0.3);
}

.form-message.is-success {
  color: #a8f5c4;
  background: rgba(15, 80, 40, 0.45);
  border: 1px solid rgba(100, 255, 150, 0.3);
}

/* Bottom disclaimer */
.hero-disclaimer-container {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 780px;
  margin-top: 0;
  display: flex;
  justify-content: center;
  padding: 0 20px;
  box-sizing: border-box;
  pointer-events: none;
}

.disclaimer-text {
  font-size: 0.8125rem;
  line-height: 1.55;
  color: rgba(255, 255, 255, 0.70);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.65);
  letter-spacing: 0.01em;
  text-align: center;
  pointer-events: auto;
}

/* Responsive */
@media (max-width: 980px) {
  .site-header {
    padding: 18px 24px;
  }

  .nav-list {
    gap: 20px;
  }
}

@media (max-width: 868px) {
  .header-container {
    grid-template-columns: 1fr auto;
  }

  .mobile-menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 76px;
    left: 0;
    width: 100%;
    height: calc(100vh - 76px);
    background: rgba(14, 8, 18, 0.96);
    backdrop-filter: blur(24px);
    padding: 32px 24px;
    flex-direction: column;
    align-items: flex-start;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth), visibility var(--transition-smooth);
    z-index: 90;
  }

  .main-nav.is-active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: 16px;
  }

  .nav-item {
    width: 100%;
  }

  .nav-link {
    width: 100%;
    justify-content: space-between;
    font-size: 1.15rem;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .dropdown-menu {
    position: static;
    transform: none;
    background: rgba(255, 255, 255, 0.06);
    box-shadow: none;
    margin-top: 8px;
    width: 100%;
    max-width: 100%;
  }

  .dropdown-menu.is-open {
    transform: none;
  }
}

@media (max-width: 520px) {
  .header-actions .btn-text {
    display: none;
  }

  .btn-glass-action {
    padding: 0 14px;
    height: 38px;
    min-height: 44px;
    font-size: 0.8125rem;
    display: inline-flex;
    align-items: center;
  }

  .hero-main {
    padding: calc(var(--nav-h) + 16px) 16px 36px;
  }

  .form-pill-container {
    padding: 4px 6px 4px 16px;
    height: 48px;
  }

  .email-input {
    font-size: 0.875rem;
  }

  .btn-icon-copy {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
  }

  .disclaimer-text {
    font-size: 0.75rem;
  }
}