/* ==========================================================================
   EverInq — Marketing Site Stylesheet
   Design system: warm minimal product site, color drawn from the E Ink
   Spectra 6 gamut (matches the brand mark's seam gradient). Instrument Sans
   for display type, IBM Plex Sans for body/UI. Motion restrained to one
   deliberate moment (the hero refresh flicker).
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Instrument+Sans:ital,wght@0,400..700;1,400..700&family=IBM+Plex+Sans:wght@400;500;600&display=swap');

:root {
  /* Color — warm paper/ink neutrals, accents pulled from the Spectra 6 gamut */
  --paper:        #F8F6F1;
  --paper-raised: #FFFFFF;
  --ink:          #1C1C1A;
  --ink-soft:     #48473F;
  --ink-faint:    #837F72;
  --rule:         #E3DFD2;

  --spectra-red:    #E83528;
  --spectra-yellow: #F5C133;
  --spectra-green:  #4A9E6B;
  --spectra-blue:   #2471A3;

  --accent:      var(--spectra-blue);
  --accent-warm: var(--spectra-red);

  /* Type */
  --font-display: 'Instrument Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Layout */
  --content-max: 1120px;
  --measure: 62ch;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.75rem;
  --space-4: 3rem;
  --space-5: 5rem;
  --space-6: 8rem;
}

/* ---- Reset & base ---- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--ink);
  text-decoration-color: var(--rule);
  text-underline-offset: 3px;
}
a:hover { text-decoration-color: var(--accent); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0;
  letter-spacing: -0.015em;
}

p { margin: 0 0 var(--space-2); max-width: var(--measure); }

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.rule {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* ---- Nav ---- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  padding: var(--space-2) 0;
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}
.nav-logo {
  height: 34px;
  width: auto;
  border-radius: 50%;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
}

.nav-links a { text-decoration: none; color: var(--ink-soft); }
.nav-links a:hover { color: var(--ink); }

.nav-links .portal-link {
  border: 1px solid var(--ink);
  padding: 0.4rem 0.9rem;
  color: var(--ink);
  border-radius: 4px;
}
.nav-links .portal-link:hover {
  background: var(--ink);
  color: var(--paper);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 32px;
  height: 32px;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
}
.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--ink);
}

@media (max-width: 640px) {
  .site-nav .container {
    position: relative;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
    background: var(--paper);
    border: 1px solid var(--rule);
    border-radius: 6px;
    padding: var(--space-3);
  }
  .nav-links.is-open {
    display: flex;
  }
  .nav-links .portal-link {
    width: 100%;
    text-align: center;
  }
}

/* ---- Hero ---- */
.hero {
  padding: var(--space-5) 0 var(--space-4);
}

.hero-grid {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.hero-copy {
  flex: 1 1 auto;
  min-width: 0;
}

.hero-media {
  flex: 0 0 500px;
  width: 500px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper-raised);
}

.hero-video {
  display: block;
  width: 100%;
  height: auto;
}

@media (max-width: 560px) {
  .hero-grid { flex-direction: column; align-items: stretch; gap: var(--space-3); margin-top: var(--space-3); }
  .hero-media { width: 100%; flex-basis: auto; max-width: 320px; order: -1; }
}

.hero-title-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.hero-logo {
  height: 110px;
  width: auto;
  flex-shrink: 0;
}

@media (max-width: 700px) {
  .hero-title-row { flex-direction: column; align-items: flex-start; gap: var(--space-2); }
  .hero-logo { height: 80px; }
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.75rem);
  max-width: 18ch;
}

.hero .lede {
  margin-top: var(--space-3);
  max-width: 54ch;
  font-size: 1.15rem;
  color: var(--ink-soft);
}

.hero-actions {
  margin-top: var(--space-3);
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  align-items: center;
}


.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.75rem 1.4rem;
  border: 1px solid var(--ink);
  border-radius: 4px;
  color: var(--paper);
  background: var(--ink);
}
.btn:hover { background: var(--accent); border-color: var(--accent); }

.btn-outline {
  background: none;
  color: var(--ink);
}
.btn-outline:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.btn-quiet {
  border-color: transparent;
  padding-left: 0;
  color: var(--ink-soft);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: var(--rule);
  background: none;
}
.btn-quiet:hover { color: var(--ink); background: none; text-decoration-color: var(--accent-warm); }

/* One-time e-ink-style refresh flicker on the hero headline.
   Mimics a bistable panel settling into its final image, then holds still. */
.refresh-text { display: inline-block; }
.refresh-text.is-flickering {
  animation: eink-refresh 620ms steps(6, end) 1;
}
@keyframes eink-refresh {
  0%   { filter: invert(0%);   opacity: 1; }
  16%  { filter: invert(100%); opacity: 0.85; }
  33%  { filter: invert(0%);   opacity: 1; }
  50%  { filter: invert(100%); opacity: 0.9; }
  66%  { filter: invert(0%);   opacity: 1; }
  100% { filter: invert(0%);   opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .refresh-text.is-flickering { animation: none; }
}

/* ---- Sections ---- */
section { padding: var(--space-5) 0; }
section + section { border-top: 1px solid var(--rule); }

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr);
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.section-head h2 {
  font-size: clamp(1.7rem, 3vw, 2.3rem);
}

.eyebrow {
  display: block;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.section-head .section-note {
  color: var(--ink-soft);
  align-self: start;
}

@media (max-width: 760px) {
  .section-head { grid-template-columns: 1fr; gap: var(--space-2); }
}

/* ---- KPI cards (why it matters) ---- */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}
@media (max-width: 860px) {
  .kpi-grid { grid-template-columns: 1fr; }
}

.kpi-card {
  padding: var(--space-3);
  background: var(--paper-raised);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--kpi-color, var(--accent));
  border-radius: 6px;
}
.kpi-card .kpi-rank {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--kpi-color, var(--accent));
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  display: block;
}
.kpi-card h3 { font-size: 1.2rem; margin-bottom: 0.5rem; }
.kpi-card p { font-size: 0.95rem; color: var(--ink-soft); margin: 0; }

.kpi-card.waste   { --kpi-color: var(--spectra-blue); }
.kpi-card.revenue { --kpi-color: var(--spectra-green); }
.kpi-card.sustain { --kpi-color: var(--spectra-yellow); }

/* ---- Sequence (How it works) ---- */
.sequence {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
}

@media (max-width: 900px) {
  .sequence { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .sequence { grid-template-columns: 1fr; }
}

.sequence li {
  border-top: 2px solid var(--ink);
  padding-top: var(--space-2);
}

.sequence .step-index {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--accent-warm);
  display: block;
  margin-bottom: 0.3rem;
}

.sequence h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.sequence p { font-size: 0.95rem; color: var(--ink-soft); margin: 0; }

/* ---- Feature list (non-sequential) ---- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4) var(--space-4);
}
@media (max-width: 700px) {
  .feature-grid { grid-template-columns: 1fr; }
}

.feature-grid dt {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}
.feature-grid dd {
  margin: 0;
  color: var(--ink-soft);
  max-width: 46ch;
}

/* ---- Muted closing note under a grid (form factors, audience, etc.) ---- */
.grid-note {
  max-width: none;
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--rule);
  font-size: 0.9rem;
  color: var(--ink-faint);
}

/* ---- Stage / credibility strip ---- */
.stage-eyebrow { margin-bottom: var(--space-3); }

.stage {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  align-items: baseline;
}
.stage .stage-item {
  border-left: 2px solid var(--accent-warm);
  padding-left: var(--space-2);
}
.stage .stage-item .label {
  display: block;
  font-size: 0.85rem;
  color: var(--ink-faint);
}
.stage .stage-item .value {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
}

/* ---- CTA / waitlist ---- */
.cta {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.cta-copy { flex: 1 1 320px; }
.cta h2 { font-size: clamp(1.7rem, 3vw, 2.2rem); max-width: 22ch; }
.cta .section-note { margin-top: var(--space-2); }

.cta-actions {
  flex: 1 1 320px;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.waitlist-form {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}
.waitlist-input {
  flex: 1 1 220px;
  padding: 0.75rem 1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  border: 1px solid var(--rule);
  border-radius: 4px;
  background: var(--paper-raised);
  color: var(--ink);
}
.waitlist-input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

.cta-secondary {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  align-items: center;
  font-size: 0.9rem;
  color: var(--ink-faint);
}

/* ---- Footer ---- */
.site-footer {
  padding: var(--space-4) 0 var(--space-5);
  color: var(--ink-faint);
  font-size: 0.9rem;
}
.site-footer .container {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}
.site-footer a { color: var(--ink-soft); }

/* ---- FAQ page specifics ---- */
.faq-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.faq-item {
  border-top: 1px solid var(--rule);
  padding: var(--space-3) 0;
}
.faq-list li:last-child { border-bottom: 1px solid var(--rule); }

.faq-item summary {
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
}
.faq-item summary::-webkit-details-marker { display: none; }

.faq-item summary .marker {
  font-family: var(--font-body);
  color: var(--accent-warm);
  font-size: 1.3rem;
  flex-shrink: 0;
  transition: transform 150ms ease;
}
.faq-item[open] summary .marker { transform: rotate(45deg); }

.faq-item .answer {
  margin-top: var(--space-2);
  color: var(--ink-soft);
  max-width: var(--measure);
}
.faq-item .answer a { color: var(--ink); }

.prompt-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}
@media (max-width: 760px) {
  .prompt-grid { grid-template-columns: 1fr; }
}

.prompt-card {
  border: 1px solid var(--rule);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  background: var(--paper-raised);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.prompt-card blockquote {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.98rem;
  line-height: 1.5;
  color: var(--ink);
}

.copy-btn {
  align-self: flex-start;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  background: none;
  border: 1px solid var(--ink-soft);
  border-radius: 4px;
  color: var(--ink-soft);
  padding: 0.4rem 0.8rem;
  cursor: pointer;
}
.copy-btn:hover { border-color: var(--ink); color: var(--ink); }
.copy-btn[data-copied="true"] {
  border-color: var(--spectra-green);
  color: var(--spectra-green);
}

.page-intro h1 { font-size: clamp(2rem, 4vw, 2.7rem); }
.page-intro .lede { color: var(--ink-soft); margin-top: var(--space-2); font-size: 1.05rem; }