/* ==========================================================================
   Relay — Landing Page
   Extends styles.css tokens. Loaded after styles.css.
   ========================================================================== */

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

.landing-body {
  overflow-y: auto;
  height: auto;
  min-height: 100%;
}

main { display: block; }

/* ==========================================================================
   Nav
   ========================================================================== */
.landing-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(13, 11, 20, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-hairline);
}

.landing-nav__inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--sp-6);
  max-width: 1120px;
  margin: 0 auto;
}

.landing-nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
}

.landing-nav__link {
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}
.landing-nav__link:hover { color: var(--text-primary); }

.landing-nav__login {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}
.landing-nav__login:hover { color: var(--text-primary); }

.landing-nav__signup {
  height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 var(--sp-5);
  border-radius: var(--radius-full);
  background: var(--bg-surface-raised);
  color: var(--text-primary);
  font-size: var(--fs-sm);
  font-weight: 700;
  text-decoration: none;
  border: 1px solid var(--border-hairline);
  transition: background var(--duration-fast) var(--ease-standard);
}
.landing-nav__signup:hover { background: var(--accent); border-color: var(--accent); }

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  max-width: 1120px;
  margin: 0 auto;
  padding: calc(var(--sp-6) * 1.5) var(--sp-6) calc(var(--sp-6) * 2.5);
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 4fr);
  gap: calc(var(--sp-6) * 2);
  align-items: center;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 100vw;
  height: 100%;
  transform: translateX(-50%);
  background:
    radial-gradient(ellipse 900px 560px at 8% -10%, rgba(110, 86, 207, 0.22), transparent 60%),
    radial-gradient(ellipse 760px 480px at 92% 6%, rgba(156, 129, 245, 0.15), transparent 55%),
    radial-gradient(ellipse 620px 420px at 50% 105%, rgba(110, 86, 207, 0.09), transparent 65%);
  z-index: -1;
  pointer-events: none;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(110, 86, 207, 0.14);
  border: 1px solid rgba(156, 129, 245, 0.25);
  color: var(--highlight);
  font-size: var(--fs-xs);
  font-weight: 600;
  margin-bottom: var(--sp-4);
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--highlight);
  box-shadow: 0 0 8px var(--highlight);
}

.hero__title {
  font-size: clamp(2.25rem, 4vw, 3.25rem);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 var(--sp-5);
}

.hero__subtitle {
  font-size: var(--fs-md);
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 46ch;
  margin: 0 0 var(--sp-6);
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-5);
}

.hero__cta {
  height: 48px;
  display: inline-flex;
  align-items: center;
  padding: 0 var(--sp-6);
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--text-primary);
  font-size: var(--fs-base);
  font-weight: 700;
  text-decoration: none;
  transition: background var(--duration-fast) var(--ease-standard),
              transform var(--duration-fast) var(--ease-standard);
}
.hero__cta:hover { background: var(--accent-hover); }
.hero__cta:active { transform: scale(0.98); }

.hero__secondary {
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}
.hero__secondary:hover { color: var(--text-primary); }

/* Hero demo — replica of the chat window */
.hero__demo { display: flex; justify-content: center; }

.demo-window {
  width: 100%;
  max-width: 380px;
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.35);
}

.demo-window__header {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-5);
  border-bottom: 1px solid var(--border-hairline);
}

.demo-window__who { display: flex; flex-direction: column; }
.demo-window__name { font-size: var(--fs-sm); font-weight: 700; }
.demo-window__status {
  font-size: var(--fs-xs);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 5px;
}

.demo-window__thread {
  padding: var(--sp-5) var(--sp-4);
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  min-height: 260px;
}

.demo-window__thread .bubble { max-width: 88%; }

.demo-typing {
  align-self: flex-start;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 12px 16px;
  border-radius: var(--radius-lg);
  border-bottom-left-radius: var(--radius-sm);
  background: var(--bubble-in);
  width: fit-content;
  margin-top: var(--sp-1);
}
.demo-typing span {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background: var(--text-muted);
  animation: typing-bounce 1.1s var(--ease-standard) infinite;
}
.demo-typing span:nth-child(2) { animation-delay: 0.15s; }
.demo-typing span:nth-child(3) { animation-delay: 0.3s; }

@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.6; }
  30% { transform: translateY(-3px); opacity: 1; }
}

.demo-msg {
  opacity: 0;
  transform: translateY(8px);
  animation: demo-msg-in 0.5s var(--ease-standard) forwards;
}
.demo-msg--1 { animation-delay: 0.2s; }
.demo-msg--2 { animation-delay: 0.9s; }
.demo-msg--3 { animation-delay: 1.6s; }
.demo-msg--4 { animation-delay: 2.3s; }

@keyframes demo-msg-in {
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .demo-msg { animation: none; opacity: 1; transform: none; }
  .demo-typing span { animation: none; opacity: 0.8; }
}

/* ==========================================================================
   Trust / Highlights Bar
   ========================================================================== */
.trust-bar {
  max-width: 1120px;
  margin: 0 auto var(--sp-6);
  padding: 0 var(--sp-6);
}

.trust-bar__inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-4);
  padding: var(--sp-5) var(--sp-6);
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.trust-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.trust-item__icon {
  font-size: 1.4rem;
  line-height: 1;
}

.trust-item__text {
  display: flex;
  flex-direction: column;
  line-height: 1.35;
}

.trust-item__text strong {
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--text-primary);
}

.trust-item__text span {
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section-header {
  margin-bottom: calc(var(--sp-6) * 1.5);
}

.section-header.text-center {
  text-align: center;
}

.section-badge {
  display: inline-block;
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--highlight);
  margin-bottom: var(--sp-2);
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.35rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 var(--sp-2);
}

.section-subtitle {
  font-size: var(--fs-base);
  color: var(--text-muted);
  max-width: 54ch;
  margin: 0 auto;
  line-height: 1.6;
}

/* ==========================================================================
   Features
   ========================================================================== */
.features {
  position: relative;
  max-width: 1120px;
  margin: 0 auto;
  padding: calc(var(--sp-6) * 2) var(--sp-6) calc(var(--sp-6) * 2.5);
}

.features::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  width: 100vw;
  height: 1px;
  transform: translateX(-50%);
  background: var(--border-hairline);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: calc(var(--sp-6) * 1.25);
}

.feature {
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: calc(var(--sp-6) * 1.2) var(--sp-5);
  transition: transform var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard);
}
.feature:hover {
  transform: translateY(-2px);
  border-color: rgba(156, 129, 245, 0.35);
}

.feature__icon {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--bg-surface-raised);
  color: var(--highlight);
  margin-bottom: var(--sp-4);
}

.feature__title {
  font-size: var(--fs-md);
  font-weight: 700;
  margin: 0 0 var(--sp-2);
}

.feature__body {
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0;
}

/* ==========================================================================
   Showcase
   ========================================================================== */
.showcase {
  position: relative;
  max-width: 1120px;
  margin: 0 auto;
  padding: calc(var(--sp-6) * 1.5) var(--sp-6) calc(var(--sp-6) * 2.5);
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 5fr);
  gap: calc(var(--sp-6) * 2);
  align-items: center;
}

.showcase::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  background: linear-gradient(
    180deg,
    transparent,
    rgba(22, 18, 36, 0.55) 15%,
    rgba(22, 18, 36, 0.55) 85%,
    transparent
  );
  z-index: -1;
  pointer-events: none;
}

.showcase__title {
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 var(--sp-4);
}

.showcase__body {
  font-size: var(--fs-base);
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 42ch;
  margin: 0;
}

.demo-list {
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: var(--sp-3);
  display: flex;
  flex-direction: column;
  gap: 2px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.3);
}

.demo-list .conv-item { cursor: default; }
.demo-list .conv-item:hover { background: inherit; }
.demo-list .conv-item.is-active:hover { background: var(--bg-surface-raised); }

/* ==========================================================================
   Security & Privacy Section
   ========================================================================== */
.security-section {
  max-width: 1120px;
  margin: 0 auto;
  padding: calc(var(--sp-6) * 1.5) var(--sp-6);
}

.security-card {
  background: radial-gradient(ellipse 700px 400px at 50% 0%, rgba(110, 86, 207, 0.18), transparent 70%),
              var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-lg);
  padding: calc(var(--sp-6) * 1.8) calc(var(--sp-6) * 1.5);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.25);
}

.security-card__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: #4DEEEA;
  font-size: var(--fs-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--sp-3);
}

.security-card__title {
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0 0 var(--sp-3);
}

.security-card__desc {
  font-size: var(--fs-base);
  color: var(--text-muted);
  max-width: 58ch;
  line-height: 1.6;
  margin: 0 0 var(--sp-5);
}

.security-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.security-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-primary);
}

.security-list li svg {
  color: var(--highlight);
  flex-shrink: 0;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-section {
  max-width: 860px;
  margin: 0 auto;
  padding: calc(var(--sp-6) * 2) var(--sp-6);
}

.faq-container {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--duration-fast) var(--ease-standard),
              background-color var(--duration-fast) var(--ease-standard);
}

.faq-item:hover {
  border-color: rgba(156, 129, 245, 0.35);
}

.faq-item[open] {
  background: var(--bg-surface-raised);
  border-color: rgba(156, 129, 245, 0.4);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4) var(--sp-5);
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.faq-question::-webkit-details-marker,
.faq-question::marker {
  display: none;
}

.faq-icon {
  color: var(--text-muted);
  transition: transform var(--duration-fast) var(--ease-standard),
              color var(--duration-fast) var(--ease-standard);
  flex-shrink: 0;
  margin-left: var(--sp-3);
}

.faq-item[open] .faq-icon {
  transform: rotate(180deg);
  color: var(--highlight);
}

.faq-answer {
  padding: 0 var(--sp-5) var(--sp-5);
  font-size: var(--fs-sm);
  line-height: 1.65;
  color: var(--text-muted);
}

.faq-answer p {
  margin: 0;
}

.faq-answer code {
  background: rgba(110, 86, 207, 0.15);
  color: var(--highlight);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.9em;
}

/* ==========================================================================
   Closing CTA
   ========================================================================== */
.closing-cta {
  margin: 0 var(--sp-6) calc(var(--sp-6) * 1.5);
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
  padding: calc(var(--sp-6) * 2.4) var(--sp-6);
  text-align: center;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-hairline);
  background:
    radial-gradient(ellipse 620px 320px at 50% -20%, rgba(110, 86, 207, 0.22), transparent 65%),
    var(--bg-surface);
}

.closing-cta__title {
  font-size: clamp(1.75rem, 3.4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  max-width: 22ch;
  margin: 0 auto var(--sp-3);
}

.closing-cta__body {
  font-size: var(--fs-base);
  color: var(--text-muted);
  margin: 0 0 var(--sp-6);
}

.closing-cta__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-4);
  flex-wrap: wrap;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.landing-footer {
  border-top: 1px solid var(--border-hairline);
  background: var(--bg-surface);
}

.landing-footer__top {
  max-width: 1120px;
  margin: 0 auto;
  padding: calc(var(--sp-6) * 1.6) var(--sp-6) var(--sp-6);
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) repeat(2, minmax(0, 1fr));
  gap: var(--sp-6);
}

.landing-footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.logo--footer { font-size: var(--fs-lg); }

.landing-footer__tagline {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  max-width: 32ch;
  margin: 0;
}

.landing-footer__col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--sp-3);
}

.landing-footer__heading {
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 var(--sp-1);
}

.landing-footer__col a {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}
.landing-footer__col a:hover { color: var(--text-primary); }

.landing-footer__bottom {
  border-top: 1px solid var(--border-hairline);
}

.landing-footer__copy {
  max-width: 1120px;
  margin: 0 auto;
  padding: var(--sp-4) var(--sp-6);
  font-size: var(--fs-xs);
  color: var(--text-muted);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: left;
    padding-top: var(--sp-5);
  }
  .hero__demo { order: -1; margin-bottom: var(--sp-2); }

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

  .showcase {
    grid-template-columns: 1fr;
  }
  .showcase__demo { order: -1; }

  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--sp-4);
  }

  .landing-nav__links .landing-nav__link {
    display: none;
  }

  .landing-footer__top {
    grid-template-columns: 1fr 1fr;
    row-gap: calc(var(--sp-6) * 1.25);
  }
  .landing-footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 520px) {
  .landing-nav__inner { padding: 0 var(--sp-4); }
  .hero { padding-left: var(--sp-4); padding-right: var(--sp-4); }
  .trust-bar { padding-left: var(--sp-4); padding-right: var(--sp-4); }
  .trust-bar__inner { grid-template-columns: 1fr; padding: var(--sp-4); }
  .features { padding-left: var(--sp-4); padding-right: var(--sp-4); }
  .showcase { padding-left: var(--sp-4); padding-right: var(--sp-4); }
  .security-section { padding-left: var(--sp-4); padding-right: var(--sp-4); }
  .security-card { padding: var(--sp-5) var(--sp-4); }
  .faq-section { padding-left: var(--sp-4); padding-right: var(--sp-4); }
  .closing-cta { margin-left: var(--sp-4); margin-right: var(--sp-4); padding: calc(var(--sp-6) * 1.6) var(--sp-4); }

  .faq-question { padding: var(--sp-4); font-size: var(--fs-sm); }
  .faq-answer { padding: 0 var(--sp-4) var(--sp-4); }

  .landing-footer__top {
    grid-template-columns: 1fr;
    padding: var(--sp-6) var(--sp-4);
  }
  .landing-footer__brand { grid-column: auto; }
  .landing-footer__copy { padding: var(--sp-4); }
}

/* ==========================================================================
   App Download Buttons
   ========================================================================== */
.app-download-row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-top: var(--sp-5);
  flex-wrap: wrap;
}

.btn-app-download {
  height: 48px;
  padding: 0 18px;
  border-radius: var(--radius-md);
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-hairline);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-standard),
              border-color var(--duration-fast) var(--ease-standard),
              transform var(--duration-fast) var(--ease-standard);
  text-decoration: none;
}

.btn-app-download:hover {
  background: var(--bg-surface);
  border-color: rgba(156, 129, 245, 0.45);
  transform: translateY(-1px);
}
.btn-app-download:active {
  transform: scale(0.97);
}

.btn-app-download__text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.15;
}

.btn-app-download__sub {
  font-size: 0.625rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.btn-app-download__main {
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--text-primary);
}