/* ==========================================================================
   TurtleShell — Brand Identity CSS · Terrapin Prime
   Palette: Canvas White · Driftwood Tan · Deep Forest · Bark Brown · Sage Leaf · Sandstone
   Typography: Inter (headings) · Montserrat (body) · JetBrains Mono (technical)
   ========================================================================== */

:root {
  /* Terrapin Prime palette */
  --canvas: #FAFAF9;
  --driftwood: #F5F5F4;
  --forest: #166534;
  --forest-hover: #15803D;
  --forest-dim: rgba(22, 101, 52, 0.08);
  --bark: #292524;
  --bark-light: #57534E;
  --sage: #86EFAC;
  --sage-dim: rgba(134, 239, 172, 0.15);
  --sandstone: #E7E5E4;

  /* Surfaces */
  --surface: #FAFAF9;
  --surface-hover: #F5F5F4;
  --border: #E7E5E4;
  --border-focus: rgba(22, 101, 52, 0.3);

  /* Shadows */
  --shadow-soft: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.08);

  /* Layout */
  --container: min(1160px, calc(100vw - 2rem));
  --radius-lg: 1.5rem;
  --radius-md: 1rem;
  --radius-sm: 0.625rem;

  /* Dynamic brand (JS-controlled for audience tabs) */
  --brand: #166534;
}

/* === RESET === */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Montserrat', system-ui, -apple-system, sans-serif;
  background: var(--canvas);
  color: var(--bark);
  min-height: 100vh;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: rgba(22, 101, 52, 0.12);
}

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

button,
input,
select,
textarea {
  font: inherit;
}

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

/* === TYPOGRAPHY === */
h1,
h2 {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--bark);
}

h3,
h4 {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--bark);
}

p,
li {
  line-height: 1.65;
}

/* === LAYOUT === */
.container {
  width: var(--container);
  margin-inline: auto;
}

/* === BACKGROUND ATMOSPHERE === */
.page-orb {
  pointer-events: none;
  position: fixed;
  border-radius: 50%;
  filter: blur(100px);
  z-index: -2;
}

.page-orb-one {
  width: 500px;
  height: 500px;
  top: -120px;
  left: -100px;
  background: radial-gradient(circle, rgba(134, 239, 172, 0.07) 0%, transparent 70%);
}

.page-orb-two {
  width: 600px;
  height: 600px;
  bottom: -200px;
  right: -150px;
  background: radial-gradient(circle, rgba(22, 101, 52, 0.04) 0%, transparent 70%);
}

.hex-bg {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.35;
  background-image:
    linear-gradient(30deg, transparent 49.5%, rgba(22, 101, 52, 0.015) 50%, transparent 50.5%),
    linear-gradient(-30deg, transparent 49.5%, rgba(22, 101, 52, 0.015) 50%, transparent 50.5%);
  background-size: 56px 97px;
}

/* === HEADER === */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(250, 250, 249, 0.92);
  border-bottom: 1px solid var(--sandstone);
}

.nav-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.25rem;
  padding: 0.75rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-mark {
  width: 2.4rem;
  height: 2.4rem;
  flex: none;
}

.brand-lockup strong {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--bark);
}

.top-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.top-links a {
  color: var(--bark-light);
  border-radius: 999px;
  padding: 0.5rem 0.85rem;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 180ms ease, background-color 180ms ease;
}

.top-links a:hover,
.top-links a:focus-visible {
  color: var(--bark);
  background: var(--driftwood);
}

/* Active page indicators */
.page-features .top-links a[href='/features.html'],
.page-how .top-links a[href='/how-it-works.html'],
.page-trust .top-links a[href='/trust.html'],
.page-waitlist .top-links a[href='/waitlist.html'] {
  color: var(--forest);
  background: var(--forest-dim);
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid transparent;
  min-height: 3rem;
  padding: 0.75rem 1.35rem;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background 200ms ease,
    border-color 200ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: var(--canvas);
  background: var(--brand);
  box-shadow: 0 4px 14px rgba(22, 101, 52, 0.18);
}

.btn-primary:hover {
  background: var(--forest-hover);
  box-shadow: 0 6px 22px rgba(22, 101, 52, 0.24);
}

.btn-secondary {
  color: var(--bark);
  background: var(--canvas);
  border-color: var(--sandstone);
}

.btn-secondary:hover {
  background: var(--driftwood);
  border-color: #D6D3D1;
}

.nav-cta {
  min-height: 2.5rem;
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
}

.btn:focus-visible,
.top-links a:focus-visible,
.tabs button:focus-visible,
.waitlist-form input:focus-visible,
.waitlist-form select:focus-visible,
.waitlist-form textarea:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* === SECTIONS === */
.section {
  padding: 6rem 0;
}

.hero {
  padding-top: 5rem;
}

.page-hero {
  padding-top: 4.5rem;
}

/* === HERO === */
.hero-grid,
.page-hero-grid,
.waitlist-grid {
  display: grid;
  gap: 2.5rem;
}

.hero-grid {
  align-items: start;
}

.eyebrow,
.band-kicker,
.stage-label,
.panel-kicker,
.summary-panel span {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--forest);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow {
  margin: 0 0 1rem;
}

h1 {
  margin: 0;
  max-width: 15ch;
  font-size: clamp(2.2rem, 4.4vw, 3.8rem);
  line-height: 1.02;
}

.page-hero h1 {
  max-width: 14ch;
}

.lead,
.section-copy,
.panel-copy {
  margin: 0;
  color: var(--bark-light);
  font-size: clamp(1rem, 1.7vw, 1.12rem);
  max-width: 44ch;
}

.hero-copy {
  max-width: 36rem;
}

.hero-points {
  list-style: none;
  display: grid;
  gap: 0.6rem;
  margin: 2rem 0 0;
  padding: 0;
}

.hero-points li {
  position: relative;
  padding-left: 1rem;
  color: var(--bark);
  font-size: 0.95rem;
}

.hero-points li::before {
  content: '';
  position: absolute;
  inset: 0.6rem auto auto 0;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--forest);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

/* === HERO STAGE === */
.hero-stage {
  display: grid;
  justify-items: start;
  gap: 1rem;
  padding: 2rem;
  border-radius: var(--radius-lg);
  background: var(--canvas);
  border: 1px solid var(--sandstone);
  box-shadow: var(--shadow-soft);
  transition: box-shadow 300ms ease;
}

.hero-stage:hover {
  box-shadow: var(--shadow-card);
}

.hero-stage-mark {
  width: 4.5rem;
  height: 4.5rem;
}

.hero-stage h2 {
  margin: 0;
  max-width: 13ch;
  font-size: clamp(1.5rem, 2.6vw, 2rem);
}

.hero-stage p {
  margin: 0;
  max-width: 30ch;
  color: var(--bark-light);
}

/* === BADGE / PROOF LISTS === */
.badge-list,
.proof-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.8rem 0 0;
  padding: 0;
}

.badge-list li,
.proof-list li {
  list-style: none;
  border-radius: 999px;
  padding: 0.4rem 0.75rem;
  font-size: 0.85rem;
  background: var(--forest-dim);
  border: 1px solid rgba(22, 101, 52, 0.1);
  color: var(--forest);
}

/* === AUDIENCE SHELL === */
.audience-shell {
  margin-top: 3rem;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  background: var(--canvas);
  border: 1px solid var(--sandstone);
  box-shadow: var(--shadow-soft);
}

.audience-shell-head {
  margin-bottom: 1rem;
}

.audience-shell-head h2,
.section-heading h2,
.cta-banner h2 {
  margin: 0;
  font-size: clamp(1.6rem, 2.6vw, 2.4rem);
  max-width: 18ch;
}

.section-heading {
  display: grid;
  gap: 0.8rem;
  margin-bottom: 2.5rem;
}

.audience-shell-body {
  display: grid;
  gap: 1rem;
}

.audience-panel {
  border-radius: var(--radius-md);
  padding: 1.3rem;
  background: var(--driftwood);
  border: 1px solid var(--sandstone);
}

.panel-kicker {
  margin: 0;
}

.panel-copy {
  margin-top: 0.5rem;
}

/* === TABS === */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tabs button {
  border: 1px solid var(--sandstone);
  border-radius: 999px;
  background: var(--canvas);
  color: var(--bark-light);
  padding: 0.6rem 0.95rem;
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  transition:
    transform 180ms ease,
    color 180ms ease,
    background 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.tabs button:hover {
  transform: translateY(-1px);
  color: var(--bark);
  background: var(--driftwood);
}

.tabs button[aria-selected='true'] {
  color: var(--canvas);
  border-color: transparent;
  background: var(--brand);
  box-shadow: 0 4px 14px rgba(22, 101, 52, 0.18);
}

/* === SECURITY MANIFESTO === */
.manifesto-section {
  border-block: 1px solid var(--sandstone);
  background: var(--driftwood);
}

.manifesto-grid {
  display: grid;
  gap: 0.75rem;
}

.manifesto-card {
  display: grid;
  grid-template-columns: 3.2rem 1fr;
  gap: 0 1.2rem;
  align-items: start;
  padding: 1.4rem 1.5rem;
  background: var(--canvas);
  border: 1px solid var(--sandstone);
  border-left: 3px solid var(--forest);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-soft);
  transition: box-shadow 250ms ease, border-color 250ms ease;
}

.manifesto-card:hover {
  box-shadow: var(--shadow-card);
  border-left-color: var(--forest-hover);
}

.manifesto-numeral {
  grid-row: 1 / 3;
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--forest);
  opacity: 0.4;
  text-align: center;
  padding-top: 0.15rem;
}

.manifesto-card h3 {
  margin: 0;
  font-size: 1.08rem;
}

.manifesto-card p {
  margin: 0.3rem 0 0;
  color: var(--bark-light);
  font-size: 0.94rem;
  grid-column: 2;
  max-width: 70ch;
}

/* === CARDS === */
.card-grid {
  display: grid;
  gap: 1rem;
}

.card-grid-three {
  display: grid;
  gap: 1rem;
}

.card-grid-one {
  grid-template-columns: 1fr;
}

.info-card,
.assurance-card,
.side-card,
.split-card {
  background: var(--canvas);
  border: 1px solid var(--sandstone);
  border-radius: var(--radius-md);
  padding: 1.3rem;
  box-shadow: var(--shadow-soft);
  transition: box-shadow 250ms ease;
}

.info-card:hover,
.assurance-card:hover {
  box-shadow: var(--shadow-hover);
}

.info-card h3,
.assurance-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
}

.info-card p,
.assurance-card p,
.side-card p {
  margin: 0;
  color: var(--bark-light);
}

.card-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  height: 2rem;
  border-radius: 999px;
  padding: 0 0.65rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--forest);
  background: var(--forest-dim);
  border: 1px solid rgba(22, 101, 52, 0.1);
  margin-bottom: 0.6rem;
}

/* === SUMMARY PANEL === */
.summary-panel {
  background: var(--canvas);
  border: 1px solid var(--sandstone);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
}

.summary-panel strong {
  display: block;
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 700;
  font-size: 1.04rem;
  margin-top: 0.45rem;
  color: var(--bark);
}

.summary-panel p {
  margin: 0.7rem 0 0;
  color: var(--bark-light);
}

/* === FEATURE BANDS === */
.feature-stack {
  display: grid;
  gap: 1rem;
}

.feature-band {
  display: grid;
  gap: 1rem;
  background: var(--canvas);
  border: 1px solid var(--sandstone);
  border-radius: var(--radius-md);
  padding: 1.4rem;
  box-shadow: var(--shadow-soft);
  transition: box-shadow 250ms ease;
}

.feature-band:hover {
  box-shadow: var(--shadow-card);
}

.feature-band h3 {
  margin: 0.35rem 0 0;
  font-size: 1.18rem;
}

.band-points {
  display: grid;
  gap: 0.55rem;
}

.band-points p {
  margin: 0;
  color: var(--bark-light);
}

/* === SECTION ACCENT === */
.section-accent {
  background: var(--driftwood);
  border-block: 1px solid var(--sandstone);
}

/* === TIMELINE === */
.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
}

.timeline-marker {
  width: 2.6rem;
  height: 2.6rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--forest-dim);
  color: var(--forest);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 0.88rem;
  border: 1px solid rgba(22, 101, 52, 0.1);
}

.timeline-card {
  background: var(--canvas);
  border: 1px solid var(--sandstone);
  border-radius: var(--radius-md);
  padding: 1.3rem;
  box-shadow: var(--shadow-soft);
  transition: box-shadow 250ms ease;
}

.timeline-card:hover {
  box-shadow: var(--shadow-card);
}

.timeline-card h2 {
  margin: 0.35rem 0 0.5rem;
  font-size: 1.2rem;
}

.timeline-card p:last-child {
  margin: 0;
  color: var(--bark-light);
}

/* === SPLIT PANEL === */
.split-panel {
  display: grid;
  gap: 1rem;
}

.split-card {
  border-radius: var(--radius-md);
}

.plain-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.plain-list li {
  position: relative;
  padding-left: 1.1rem;
  color: var(--bark-light);
}

.plain-list li + li {
  margin-top: 0.65rem;
}

.plain-list li::before {
  content: '';
  position: absolute;
  inset: 0.68rem auto auto 0;
  width: 0.4rem;
  height: 0.4rem;
  border-radius: 50%;
  background: var(--forest);
}

/* === CTA BANNER === */
.cta-banner {
  display: grid;
  gap: 1.5rem;
  align-items: center;
  border-radius: var(--radius-lg);
  padding: 2rem;
  background: var(--canvas);
  border: 1px solid var(--sandstone);
  box-shadow: var(--shadow-soft);
}

.cta-banner h2 {
  max-width: 16ch;
}

/* === WAITLIST === */
.waitlist-grid {
  align-items: start;
}

.waitlist-benefits {
  margin-top: 1.5rem;
}

.waitlist-panel {
  background: var(--canvas);
  border: 1px solid var(--sandstone);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
}

.waitlist-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1.4rem;
}

.waitlist-form label {
  display: grid;
  gap: 0.4rem;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--bark);
}

.waitlist-form input,
.waitlist-form select,
.waitlist-form textarea {
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--sandstone);
  background: var(--canvas);
  color: var(--bark);
  padding: 0.75rem 0.9rem;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.waitlist-form input:focus,
.waitlist-form select:focus,
.waitlist-form textarea:focus {
  border-color: var(--forest);
  box-shadow: 0 0 0 3px rgba(22, 101, 52, 0.08);
  outline: none;
}

.waitlist-form textarea {
  min-height: 8rem;
  resize: vertical;
}

.waitlist-form input::placeholder,
.waitlist-form textarea::placeholder {
  color: #A8A29E;
}

.waitlist-form select {
  cursor: pointer;
}

.waitlist-form .full,
.waitlist-status,
.waitlist-submit {
  grid-column: 1 / -1;
}

.waitlist-submit {
  justify-self: start;
  min-width: 11rem;
}

.waitlist-status {
  margin: 0;
  min-height: 1.5rem;
  color: var(--bark-light);
  font-weight: 600;
  font-size: 0.88rem;
}

.waitlist-status[data-state='saving'] {
  color: var(--bark-light);
}

.waitlist-status[data-state='success'] {
  color: var(--forest);
}

.waitlist-status[data-state='warning'] {
  color: #B45309;
}

/* === FOOTER === */
.site-footer {
  padding: 2rem 0 2.5rem;
}

.footer-row {
  display: grid;
  gap: 1.4rem;
  align-items: start;
  border-top: 1px solid var(--sandstone);
  padding-top: 1.4rem;
}

.footer-row strong {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.footer-row p {
  margin: 0.35rem 0 0;
  color: var(--bark-light);
  max-width: 22rem;
  font-size: 0.88rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.1rem;
  color: var(--bark-light);
  font-size: 0.88rem;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--forest);
}

.footer-copyright {
  text-align: center;
  font-size: 0.78rem;
  color: var(--bark-light);
  margin: 1.4rem auto 0;
  padding-top: 1rem;
  border-top: 1px solid var(--sandstone);
}

/* === SCROLL REVEAL === */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* === RESPONSIVE === */
@media (min-width: 760px) {
  .card-grid-three,
  .split-panel,
  .footer-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-band {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .hero-grid,
  .page-hero-grid,
  .waitlist-grid {
    grid-template-columns: minmax(0, 1fr) minmax(340px, 0.78fr);
  }

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

  .audience-shell-body {
    grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
    align-items: start;
  }

  .cta-banner {
    grid-template-columns: minmax(0, 1.25fr) auto;
  }

  .footer-row {
    grid-template-columns: minmax(0, 1.2fr) auto;
    justify-content: space-between;
  }
}

@media (max-width: 979px) {
  .nav-cta {
    display: none;
  }
}

@media (max-width: 899px) {
  .nav-row {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .top-links {
    justify-content: flex-start;
  }
}

@media (max-width: 759px) {
  .section {
    padding: 4rem 0;
  }

  .hero {
    padding-top: 3rem;
  }

  h1,
  .page-hero h1 {
    max-width: 14ch;
  }

  .waitlist-form {
    grid-template-columns: 1fr;
  }

  .tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 0.25rem;
  }

  .tabs button {
    white-space: nowrap;
  }

  .manifesto-card {
    grid-template-columns: 2.4rem 1fr;
    gap: 0 0.8rem;
    padding: 1.2rem;
  }

  .manifesto-numeral {
    font-size: 1.1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}