/* =============================================================================
   base.css — HumanTrace Redesign v0.5
   Shared layout system and components. No raw values — tokens.css only.
   Load order: tokens.css → base.css → page <style>.
   ============================================================================= */


/* =============================================================================
   1. RESET
   ============================================================================= */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
}

img, picture, svg { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; }
p, h1, h2, h3, h4 { overflow-wrap: break-word; }
ul { list-style: none; }
a { text-decoration: none; color: inherit; }


/* =============================================================================
   2. BASE TYPOGRAPHY
   ============================================================================= */

html, body { background-color: var(--color-bg); }

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  color: var(--color-text);
}

p { max-width: 66ch; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--weight-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-text);
}


/* =============================================================================
   3. CONTAINERS + SECTIONS
   ============================================================================= */

.wrap {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--page-pad);
}

.sect        { padding-block: var(--section-pad); }
.sect--sm    { padding-block: var(--section-sm); }
.sect--ruled { border-top: 1px solid var(--color-rule); }

/* Alternating surface colours */
.surface-light { background-color: var(--color-bg); }
.surface-mid   { background-color: var(--color-bg-alt); }
.surface-dark  { background-color: var(--color-bg-dark); color: var(--color-text-on-dark); }


/* =============================================================================
   4. TYPOGRAPHY ATOMS
   ============================================================================= */

.label {
  font-family: var(--font-body);
  font-size: var(--text-label);
  font-weight: var(--weight-body-medium);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-accent);
  display: block;
  margin-bottom: var(--space-sm);
}

.label--on-dark { color: var(--color-text-on-dark-whisper); }
.label--muted   { color: var(--color-text-muted); }

.display-hed {
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-weight: var(--weight-display);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
}

.section-hed {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: var(--weight-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.body-serif {
  font-family: var(--font-display);
  font-size: var(--text-body);
  font-weight: var(--weight-display);
  line-height: 1.55;
  letter-spacing: -0.01em;
}


/* =============================================================================
   4b. LOGO
   ============================================================================= */

.ht-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  text-decoration: none;
  line-height: 1;
}

.ht-logo__mark {
  flex-shrink: 0;
  color: var(--color-accent);
}

.ht-logo__human {
  font-family: var(--font-display);
  font-weight: 500;
  font-style: normal;
  letter-spacing: 0.01em;
}

.ht-logo__trace {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  letter-spacing: 0.025em;
}


/* =============================================================================
   5. NAVIGATION
   ============================================================================= */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding-block: var(--space-sm);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-100%);
  transition:
    opacity 0.35s ease,
    transform 0.4s cubic-bezier(0.16, 1, 0.3, 1),
    background-color 0.3s ease,
    backdrop-filter 0.3s ease;
}

.nav--visible {
  opacity: 1;
  pointer-events: auto;
  transform: none;
  background-color: color-mix(in srgb, var(--parchment) 94%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-rule);
}

.nav--hidden { transform: translateY(-100%); }

.nav__inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--page-pad);
}

.nav__wordmark {
  font-size: clamp(1.05rem, 1.30vw + 0.60rem, 1.38rem);
  color: var(--color-text);
}

.nav__contact {
  font-family: var(--font-body);
  font-size: var(--text-label);
  font-weight: 400;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-text-soft);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  transition: color 0.2s;
}
.nav__contact:hover { color: var(--color-text); }

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-xs);
}
.nav__hamburger span {
  display: block;
  width: 22px; height: 1px;
  background-color: var(--color-text);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav__panel {
  max-height: 0;
  overflow: hidden;
  padding-inline: var(--page-pad);
  background-color: color-mix(in srgb, var(--parchment) 97%, transparent);
  border-top: 1px solid transparent;
  transition:
    max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1),
    padding 0.35s ease;
}
.nav__panel a {
  display: block;
  font-size: var(--text-small);
  font-weight: var(--weight-body);
  color: var(--color-text);
  padding-block: 0.3rem;
}

@media (max-width: 600px) {
  .nav__contact  { display: none; }
  .nav__hamburger { display: flex; }

  .nav--open .nav__panel {
    max-height: 200px;
    padding-block: var(--space-md);
    border-top-color: var(--color-rule);
  }
  .nav--open .nav__hamburger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
  .nav--open .nav__hamburger span:nth-child(2) { opacity: 0; }
  .nav--open .nav__hamburger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
}


/* =============================================================================
   6. BUTTONS
   ============================================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.76rem 1.70rem;
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: 400;
  letter-spacing: var(--tracking-button);
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  white-space: nowrap;
  transition:
    background-color 0.25s ease,
    color            0.25s ease,
    border-color     0.25s ease,
    transform        0.14s ease;
  -webkit-tap-highlight-color: transparent;
}

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

/* Ink fill — on light backgrounds */
.btn--ink {
  background-color: var(--color-text);
  border-color:     var(--color-text);
  color:            var(--color-bg);
}
.btn--ink:hover {
  background-color: var(--color-accent);
  border-color:     var(--color-accent);
  transform:        translateY(-1px);
}

/* Ghost — on dark backgrounds */
.btn--ghost {
  background-color: transparent;
  border-color:     rgba(245, 239, 229, 0.25);
  color:            rgba(245, 239, 229, 0.6);
}
.btn--ghost:hover {
  background-color: rgba(245, 239, 229, 0.07);
  border-color:     rgba(245, 239, 229, 0.45);
  color:            rgba(245, 239, 229, 0.88);
  transform:        translateY(-1px);
}

/* Amber outline — on light backgrounds */
.btn--outline-amber {
  background-color: transparent;
  border-color:     var(--color-accent);
  color:            var(--color-accent);
}
.btn--outline-amber:hover {
  background-color: var(--color-accent);
  color:            var(--parchment);
  transform:        translateY(-1px);
}

/* Amber fill — footer CTA */
.btn--amber {
  background-color: var(--color-accent);
  border-color:     var(--color-accent);
  color:            var(--parchment);
}
.btn--amber:hover {
  background-color: var(--color-text-on-dark);
  border-color:     var(--color-text-on-dark);
  color:            var(--night);
  transform:        translateY(-1px);
}


/* =============================================================================
   7. SCROLL REVEAL
   ============================================================================= */

.reveal {
  opacity: 0;
  transform: translateY(1.6rem);
  transition:
    opacity   0.90s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    transform 0.90s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.reveal--visible { opacity: 1; transform: none; }

/* Staggered children */
.stagger > * {
  opacity: 0;
  transform: translateY(1.4rem);
  transition:
    opacity   0.85s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    transform 0.85s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.stagger--visible > *:nth-child(1) { opacity: 1; transform: none; }
.stagger--visible > *:nth-child(2) { opacity: 1; transform: none; transition-delay: 0.16s; }
.stagger--visible > *:nth-child(3) { opacity: 1; transform: none; transition-delay: 0.32s; }
.stagger--visible > *:nth-child(4) { opacity: 1; transform: none; transition-delay: 0.48s; }

/* Paired reveal (e.g. founders grid) */
.pair > * {
  opacity: 0;
  transform: translateY(1.4rem);
  transition:
    opacity   0.90s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    transform 0.90s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.pair--visible > *:nth-child(1) { opacity: 1; transform: none; }
.pair--visible > *:nth-child(2) { opacity: 1; transform: none; transition-delay: 0.24s; }

/* Phrases column — slightly delayed vs label + anchor */
.reveal--phrases {
  opacity: 0;
  transform: translateY(1.2rem);
  transition:
    opacity   0.90s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    transform 0.90s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.reveal--phrases.reveal--visible { opacity: 1; transform: none; transition-delay: 0.38s; }

/* Anchor — slightly delayed vs label */
.reveal.phrases__anchor.reveal--visible { transition-delay: 0.18s; }

/* Diagnosis first line — waits for phrases to appear */
.reveal--diagnosis {
  opacity: 0;
  transform: translateY(1rem);
  transition:
    opacity   1.00s ease,
    transform 1.00s ease;
}
.reveal--diagnosis.reveal--visible { opacity: 1; transform: none; transition-delay: 0.28s; }

/* "Except each other." — triggered by scroll position (see JS), short CSS transition */
.reveal--except {
  opacity: 0;
  transform: translateY(0.6rem);
  transition:
    opacity   1.00s ease,
    transform 1.00s ease;
}
.reveal--except.reveal--visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal, .stagger > *, .pair > *,
  .reveal--phrases, .reveal--diagnosis, .reveal--except {
    opacity: 1; transform: none; transition: none;
  }
}


/* =============================================================================
   8. MODAL
   ============================================================================= */

.modal {
  display: none;
  position: fixed; inset: 0;
  z-index: 2000;
  align-items: flex-start; justify-content: center;
  padding: clamp(1.5rem, 4vw, 3rem);
  padding-top: clamp(2rem, 8vh, 5rem);
  overflow-y: auto;
}
.modal--open { display: flex; }

.modal-overlay {
  position: absolute; inset: 0;
  background: color-mix(in srgb, var(--espresso) 82%, transparent);
  animation: overlayIn 0.22s ease both;
}
@keyframes overlayIn { from { opacity: 0; } to { opacity: 1; } }

.modal-card {
  position: relative; z-index: 1;
  display: flex; flex-direction: column;
  background-color: var(--parchment);
  border-radius: var(--radius-lg);
  width: 100%; max-width: 740px;
  max-height: calc(100dvh - 4rem);
  overflow: clip;
  animation: cardUp 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94) both;
  box-shadow: 0 40px 100px color-mix(in srgb, var(--espresso) 30%, transparent);
}
@keyframes cardUp {
  from { opacity: 0; transform: translateY(1.5rem); }
  to   { opacity: 1; transform: none; }
}

.modal-header {
  flex-shrink: 0;
  background-color: var(--night);
  padding: var(--space-md);
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: var(--space-sm);
}

.modal-title {
  font-family: var(--font-display);
  font-size: var(--text-h2);
  font-weight: var(--weight-display-medium);
  letter-spacing: var(--tracking-heading);
  color: var(--night-text);
  margin: 0; max-width: none;
}
.modal-sub {
  font-size: var(--text-small);
  color: var(--night-muted);
  margin: 0.2rem 0 0;
  max-width: none;
}

.modal-close {
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  width: 2rem; height: 2rem;
  background: none; border: none; cursor: pointer;
  color: var(--night-whisper);
  border-radius: var(--radius-full);
  transition: color 0.2s, background-color 0.2s;
}
.modal-close:hover {
  color: var(--night-text);
  background-color: var(--night-rule);
}

.modal-embed { flex: 1; min-height: 0; overflow-y: auto; padding: var(--space-xs); }

.modal-card--narrow { max-width: 520px; }

/* ── Contact form ── */
.contact-form-wrap { padding: var(--space-md); padding-bottom: var(--space-xl); }

.contact-form { display: flex; flex-direction: column; gap: var(--space-sm); }

.contact-form__row { display: flex; flex-direction: column; gap: 0.35rem; }

.contact-form__label {
  display: block;
  font-size: var(--text-small);
  font-weight: 500;
  color: var(--color-text);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}
.contact-form__optional {
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--color-text-soft);
}

.contact-form__input {
  display: block;
  width: 100%;
  font-family: var(--font-body);
  font-size: var(--text-body);
  color: var(--color-text);
  background: var(--parchment-mid);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.85rem;
  transition: border-color 0.18s, box-shadow 0.18s;
  box-sizing: border-box;
  -webkit-appearance: none;
  appearance: none;
}
.contact-form__input:focus {
  outline: none;
  border-color: var(--amber);
  box-shadow: 0 0 0 3px var(--amber-soft);
}
.contact-form__textarea { resize: vertical; min-height: 7rem; }

.contact-form__error {
  font-size: var(--text-small);
  color: #b84040;
  opacity: 0;
  transition: opacity 0.6s ease;
}
.contact-form__error:not(:empty) { opacity: 1; }

.contact-form__submit { margin-top: 0; align-self: flex-start; }
.contact-form__submit:disabled { opacity: 0.6; cursor: not-allowed; }

.contact-success {
  display: flex; flex-direction: column;
  align-items: flex-start;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-md);
}
.contact-success__title {
  font-family: var(--font-display);
  font-size: var(--text-h2);
  font-weight: var(--weight-display-medium);
  letter-spacing: var(--tracking-heading);
  color: var(--color-text);
  margin: 0;
}
.contact-success__body {
  font-size: var(--text-body);
  color: var(--color-text-soft);
  margin: 0;
}


/* =============================================================================
   9. UTILITIES
   ============================================================================= */

.flex         { display: flex; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-wrap    { flex-wrap: wrap; }
.items-start  { align-items: flex-start; }
.gap-sm       { gap: var(--space-sm); }
.gap-md       { gap: var(--space-md); }
.gap-lg       { gap: var(--space-lg); }
.gap-xl       { gap: var(--space-xl); }

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


/* =============================================================================
   10. SCROLLBAR
   ============================================================================= */

::-webkit-scrollbar               { width: 4px; }
::-webkit-scrollbar-track         { background: transparent; }
::-webkit-scrollbar-thumb         { background: rgba(26, 18, 9, 0.12); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover   { background: rgba(26, 18, 9, 0.22); }
*                                  { scrollbar-width: thin; scrollbar-color: rgba(26,18,9,0.12) transparent; }


/* =============================================================================
   11. COOKIE BANNER (injected by cookie.js)
   ============================================================================= */

.cookie-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 9999;
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-rule);
  padding: var(--space-md) clamp(1.25rem, 5vw, 6rem);
  transform: translateY(100%);
  transition: transform 0.42s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 -4px 24px rgba(26, 18, 9, 0.07);
}

.cookie-banner--visible { transform: translateY(0); }

.cookie-banner__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  max-width: var(--max-width);
  margin-inline: auto;
  flex-wrap: wrap;
}

.cookie-banner__msg {
  font-family: var(--font-body);
  font-size: var(--text-small);
  font-weight: var(--weight-body);
  line-height: 1.6;
  color: var(--color-text-soft);
  flex: 1 1 26rem;
  max-width: 56ch;
  margin: 0;
}

.cookie-banner__msg strong { font-weight: var(--weight-body-medium); color: var(--color-text); }

.cookie-banner__link {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: var(--color-rule);
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
  white-space: nowrap;
}
.cookie-banner__link:hover { color: var(--color-accent); text-decoration-color: var(--color-accent); }

.cookie-banner__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.cookie-banner__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xs) var(--space-md);
  font-family: var(--font-body);
  font-size: var(--text-label);
  font-weight: var(--weight-body-medium);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  border-radius: var(--radius-full);
  border: 1.5px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.25s ease, color 0.25s ease, border-color 0.25s ease, transform 0.14s ease, box-shadow 0.14s ease;
  -webkit-tap-highlight-color: transparent;
}

.cookie-banner__btn:active,
.cookie-banner__btn:hover:active {
  transform: translateY(2px) scale(0.978);
  box-shadow: inset 0 3px 10px rgba(26, 18, 9, 0.18);
}

.cookie-banner__btn--accept { background-color: var(--espresso); border-color: var(--espresso); color: var(--parchment); }
.cookie-banner__btn--accept:hover { background-color: var(--color-accent); border-color: var(--color-accent); color: var(--espresso); }
.cookie-banner__btn--decline { background-color: transparent; border-color: var(--color-rule); color: var(--color-text-muted); }
.cookie-banner__btn--decline:hover { border-color: var(--color-text-muted); color: var(--color-text-soft); }

@media (max-width: 760px) {
  .cookie-banner {
    padding: var(--space-sm) clamp(1.25rem, 5vw, 2rem);
  }
  .cookie-banner__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
  .cookie-banner__msg {
    flex-basis: auto;
    font-size: var(--text-label);
    line-height: 1.5;
  }
  .cookie-banner__actions {
    width: 100%;
    flex-shrink: 0;
  }
}


/* =============================================================================
   12. FOOTER (shared — page-specific CTA lives in each page's <style>)
   ============================================================================= */

footer {
  background-color: var(--color-bg-dark);
  color: var(--color-text-on-dark);
  padding-block: clamp(4.5rem, 8vw, 8rem);
  position: relative; overflow: hidden;
}
footer::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 55% 70% at 105% 35%,
    color-mix(in srgb, var(--amber) 14%, transparent) 0%, transparent 55%);
  pointer-events: none;
}
footer > .wrap { position: relative; z-index: 1; }

.footer__bottom {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: var(--space-md);
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
}

.footer__legal {
  font-family: var(--font-body);
  font-size: var(--text-label);
  font-weight: var(--weight-body);
  color: var(--color-text-on-dark-whisper);
  transition: color 0.2s;
}
.footer__legal:hover { color: var(--color-text-on-dark-soft); }

.footer__links { display: flex; gap: var(--space-lg); }


/* Cookie banner pushes the page up rather than overlapping the footer */
body {
  padding-bottom: var(--cookie-h, 0px);
  transition: padding-bottom 0.42s cubic-bezier(0.16, 1, 0.3, 1);
}