/* —— Sticky nav —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  border-bottom: 1px solid transparent;
  background: rgba(246, 245, 242, 0.82);
  backdrop-filter: blur(14px) saturate(1.1);
  transition:
    border-color 220ms var(--ease),
    background 220ms var(--ease),
    box-shadow 220ms var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 8px 24px rgba(15, 20, 25, 0.04);
}

.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.04em;
  color: var(--ink);
  text-decoration: none;
}

.brand:hover {
  color: var(--ink);
}

.brand__mark {
  color: var(--accent);
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem 1.25rem;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__links a {
  display: inline-flex;
  padding: 0.45rem 0.6rem;
  border-radius: 6px;
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
}

.nav__links a:hover,
.nav__links a[aria-current="page"] {
  color: var(--ink);
  background: var(--azure-soft);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
}

.nav-toggle__bars {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--ink);
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--ink);
}

.nav-toggle__bars::before {
  top: -5px;
}

.nav-toggle__bars::after {
  top: 5px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  top: 0;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  top: 0;
  transform: rotate(-45deg);
}

/* —— Buttons —— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.7rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-weight: 650;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  text-decoration: none;
  cursor: pointer;
  transition:
    background 180ms var(--ease),
    color 180ms var(--ease),
    border-color 180ms var(--ease),
    box-shadow 180ms var(--ease),
    transform 180ms var(--ease);
}

.btn--primary {
  background: var(--cta);
  color: var(--cta-ink);
  box-shadow: 0 8px 20px rgba(255, 75, 43, 0.22);
}

.btn--primary:hover {
  background: var(--cta-hover);
  color: var(--cta-ink);
  transform: translateY(-1px);
}

.btn--secondary {
  background: var(--bg-elevated);
  color: var(--ink);
  border-color: var(--line-strong);
}

.btn--secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
}

.btn--ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.28);
}

.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}

.btn--large {
  padding: 0.9rem 1.45rem;
  font-size: 1.02rem;
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* —— Badge —— */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.badge--soon {
  background: var(--amber-soft);
  color: var(--amber-deep);
}

.badge--live {
  background: var(--lime-soft);
  color: var(--lime-deep);
}

.badge--shield {
  background: var(--azure-soft);
  color: var(--azure);
}

/* —— Prop cards (interaction-light; used as section content blocks) —— */
.prop-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.25rem, 3vw, 2rem);
}

.prop-grid--three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.prop {
  padding: clamp(1.5rem, 3vw, 2rem);
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  opacity: 0;
  transform: translateY(12px);
  transition:
    opacity 560ms var(--ease-out),
    transform 560ms var(--ease-out),
    border-color 180ms var(--ease),
    box-shadow 180ms var(--ease);
}

.prop.is-visible {
  opacity: 1;
  transform: none;
}

.prop:hover {
  border-color: rgba(47, 107, 255, 0.28);
  box-shadow: var(--shadow-md);
}

.prop__icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 12px;
  display: grid;
  place-items: center;
  margin-bottom: 1.1rem;
  font-size: 1.15rem;
}

.prop__icon--forward {
  background: var(--coral-soft);
  color: var(--coral);
}

.prop__icon--shield {
  background: var(--azure-soft);
  color: var(--azure);
}

.prop__icon--organize {
  background: var(--lime-soft);
  color: var(--lime-deep);
}

.prop__icon--agent {
  background: var(--violet-soft);
  color: var(--violet);
}

.prop h3 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--ink);
}

.prop p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.55;
}

.prop__meta {
  margin-top: 1rem;
}

/* —— Steps —— */
.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 1.5rem 1.35rem 1.5rem;
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  opacity: 0;
  transform: translateY(14px);
  transition:
    opacity 560ms var(--ease-out),
    transform 560ms var(--ease-out);
}

.step.is-visible {
  opacity: 1;
  transform: none;
}

.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  display: block;
  margin-bottom: 1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.step h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.step p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

/* —— Waitlist form (local placeholder) —— */
.waitlist {
  max-width: 32rem;
  margin-inline: auto;
}

.waitlist__form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.5rem;
}

.waitlist__input {
  flex: 1 1 14rem;
  min-width: 0;
  padding: 0.9rem 1.1rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: var(--bg-elevated);
  font: inherit;
  color: var(--ink);
}

.waitlist__input::placeholder {
  color: var(--muted-soft);
}

.waitlist__hint,
.waitlist__status {
  margin: 0.85rem 0 0;
  font-size: 0.92rem;
  color: var(--muted);
  text-align: center;
}

.waitlist__status[data-state="ok"] {
  color: var(--ok);
}

.waitlist__status[data-state="error"] {
  color: var(--coral);
}

/* —— Inbox product mock —— */
.inbox-mock {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-float);
  overflow: hidden;
  min-height: 28rem;
}

.inbox-mock__chrome {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.1rem;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #fbfbf9, #f3f2ee);
}

.inbox-mock__dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--line-strong);
}

.inbox-mock__dot:nth-child(1) {
  background: #ff5f57;
}

.inbox-mock__dot:nth-child(2) {
  background: #febc2e;
}

.inbox-mock__dot:nth-child(3) {
  background: #28c840;
}

.inbox-mock__title {
  margin-left: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-transform: uppercase;
}

.inbox-mock__body {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  min-height: 24rem;
}

.inbox-mock__rail {
  padding: 1rem 0.75rem;
  border-right: 1px solid var(--line);
  background: #fafaf7;
}

.inbox-mock__rail-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.65rem;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
}

.inbox-mock__rail-item.is-active {
  background: var(--azure-soft);
  color: var(--azure);
}

.inbox-mock__list {
  padding: 0.75rem;
  display: grid;
  gap: 0.55rem;
  align-content: start;
}

.mail-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.75rem;
  align-items: start;
  padding: 0.85rem 0.9rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  background: transparent;
  animation: mailIn 640ms var(--ease-out) both;
}

.mail-row:nth-child(1) {
  animation-delay: 120ms;
}

.mail-row:nth-child(2) {
  animation-delay: 240ms;
}

.mail-row:nth-child(3) {
  animation-delay: 360ms;
}

.mail-row:nth-child(4) {
  animation-delay: 480ms;
}

.mail-row.is-focus {
  background: #fff;
  border-color: rgba(47, 107, 255, 0.22);
  box-shadow: var(--shadow-sm);
}

.mail-row__avatar {
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: #fff;
}

.mail-row__avatar--a {
  background: var(--azure);
}

.mail-row__avatar--b {
  background: var(--coral);
}

.mail-row__avatar--c {
  background: var(--violet);
}

.mail-row__avatar--d {
  background: var(--lime-deep);
}

.mail-row__meta {
  min-width: 0;
}

.mail-row__from {
  margin: 0;
  font-weight: 650;
  font-size: 0.88rem;
  color: var(--ink);
}

.mail-row__subject {
  margin: 0.15rem 0 0;
  font-size: 0.84rem;
  color: var(--ink-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mail-row__snippet {
  margin: 0.2rem 0 0;
  font-size: 0.78rem;
  color: var(--muted-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.mail-row__tags {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.35rem;
}

.tag {
  display: inline-flex;
  padding: 0.18rem 0.45rem;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.tag--clean {
  background: var(--lime-soft);
  color: var(--lime-deep);
}

.tag--action {
  background: var(--coral-soft);
  color: var(--coral);
}

.tag--file {
  background: var(--azure-soft);
  color: var(--azure);
}

.tag--noise {
  background: var(--bg-tint);
  color: var(--muted);
}

@keyframes mailIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* —— Flow diagram —— */
.flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 0.65rem;
  align-items: stretch;
}

.flow__node {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.35rem 1.2rem;
  box-shadow: var(--shadow-sm);
  opacity: 0;
  transform: translateY(10px);
  transition:
    opacity 520ms var(--ease-out),
    transform 520ms var(--ease-out);
}

.flow__node.is-visible {
  opacity: 1;
  transform: none;
}

.flow__node--accent {
  background: var(--azure-soft);
  border-color: rgba(47, 107, 255, 0.28);
}

.flow__kicker {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--muted-soft);
}

.flow__node strong {
  display: block;
  margin: 0.35rem 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.flow__node p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.flow__arrow {
  width: 1.5rem;
  align-self: center;
  height: 1px;
  background: var(--line-strong);
  position: relative;
  opacity: 0;
  transition: opacity 520ms var(--ease-out);
}

.flow__arrow.is-visible {
  opacity: 1;
}

.flow__arrow::after {
  content: "";
  position: absolute;
  right: -2px;
  top: -3px;
  width: 7px;
  height: 7px;
  border-right: 1.5px solid var(--line-strong);
  border-top: 1.5px solid var(--line-strong);
  transform: rotate(45deg);
}

/* —— Footer —— */
.site-footer {
  padding: 2.5rem 0 2.75rem;
  border-top: 1px solid var(--line);
  background: var(--bg-elevated);
}

.site-footer__grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.site-footer__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.03em;
  color: var(--ink);
  text-decoration: none;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__links a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.92rem;
}

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

.site-footer__note {
  margin: 0;
  color: var(--muted-soft);
  font-size: 0.88rem;
}

@media (max-width: 900px) {
  .prop-grid,
  .prop-grid--three,
  .steps {
    grid-template-columns: 1fr;
  }

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

  .flow__arrow {
    width: 1px;
    height: 1.25rem;
    margin-inline: auto;
  }

  .flow__arrow::after {
    right: -3px;
    top: auto;
    bottom: -2px;
    transform: rotate(135deg);
  }

  .inbox-mock__body {
    grid-template-columns: 1fr;
  }

  .inbox-mock__rail {
    display: flex;
    gap: 0.35rem;
    overflow-x: auto;
    border-right: none;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 780px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav {
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    padding: 1rem var(--gutter) 1.25rem;
    background: rgba(255, 255, 255, 0.97);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
  }

  .nav.is-open {
    display: flex;
  }

  .nav__links {
    flex-direction: column;
    align-items: stretch;
  }

  .nav__links a {
    padding: 0.75rem 0.85rem;
  }
}