/* =============================================================================
   site.css — InnerClimb Corporate Site
   Page composition, responsive layout, and contextual overrides only.
   No design token declarations belong here — tokens live in design-system.css.
   T009: layout shell, breakpoints, section composition
   T015: typography hierarchy, summary styles, spacing
   T021: product card, badge, CTA styles
   T027: principle statement styles
   T033: performance pass
   ============================================================================= */

/* ---------------------------------------------------------------------------
   1. Site Header & Navigation
   --------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: linear-gradient(135deg, var(--glass-bg), var(--glass-bg-strong));
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  height: 4rem;
}

.site-logo {
  font-family: var(--font-display);
  font-size: var(--text-h3);
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.03em;
  opacity: 0.85;
}

.site-logo span {
  color: var(--color-text-muted);
  font-weight: 300;
}

/* Nav pill container */
.site-nav {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  list-style: none;
  padding: 0.25rem;
  margin: 0;
  border-radius: var(--radius-full);
  background-color: var(--glass-bg);
  border: 1px solid var(--color-border);
}

.site-nav a {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.01em;
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.site-nav a:hover {
  color: var(--color-text);
}

.site-nav a.is-active {
  color: var(--color-text);
  background-color: var(--color-surface);
}

/* Right header group: lang + toggle */
.site-header__right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  justify-self: end;
}

/* Language switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0.1rem;
  list-style: none;
  padding: 0;
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.06em;
}

.lang-switcher a {
  text-transform: uppercase;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 0.2rem 0.3rem;
  transition: color var(--transition-fast);
}

.lang-switcher a[aria-current="true"],
.lang-switcher a.is-active {
  color: var(--color-text);
}

.lang-switcher a:hover {
  color: var(--color-text);
}

.lang-switcher li + li::before {
  content: "·";
  color: var(--color-border);
  margin-right: 0.1rem;
}

@media (max-width: 768px) {
  .site-nav { display: none; }
  .site-header__inner {
    grid-template-columns: 1fr auto;
    padding-inline: var(--space-4);
  }
}

/* ---------------------------------------------------------------------------
   2. Page Sections — Common
   --------------------------------------------------------------------------- */
.section {
  padding-block: var(--space-24);
  position: relative;
  z-index: 1;
}

.section--alt {
  background-color: var(--color-surface);
}

.section__label {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.section__label::before {
  content: "";
  display: inline-block;
  width: 32px;
  height: 1px;
  background: currentColor;
  flex-shrink: 0;
}

.section__title {
  margin-bottom: var(--space-4);
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.section__title .muted {
  font-weight: 400;
  color: var(--color-text-muted);
}

.section__summary {
  max-width: 52ch;
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  font-size: var(--text-summary);
  line-height: var(--leading-relaxed);
}

.section__body {
  max-width: 58ch;
}

.section__body p {
  color: var(--color-text-muted);
}

/* Philosophy section — border top + two-column grid */
#philosophy {
  border-top: 1px solid var(--color-border);
}

#philosophy .container {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1rem 3.5rem;
  align-items: start;
}

#philosophy .section__label {
  grid-column: 1 / -1;
}

#philosophy .section__title {
  grid-column: 1;
  grid-row: 2;
}

#philosophy .section__summary {
  grid-column: 1;
  grid-row: 3;
}

#philosophy .section__body {
  grid-column: 2;
  grid-row: 2 / 5;
  max-width: none;
  border-top: 1px solid var(--color-border);
}

#philosophy .section__body p {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
  display: grid;
  grid-template-columns: 1.25rem 1fr 1.25rem;
  gap: 0.75rem;
  align-items: baseline;
  margin-top: 0;
  font-size: 1.05rem;
}

#philosophy .section__body p::before {
  content: "—";
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  font-size: var(--text-label);
}

#philosophy .section__body p::after {
  content: "×";
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  font-size: var(--text-label);
  text-align: right;
}

#philosophy .section__body p:last-child {
  color: var(--color-text);
  font-weight: var(--weight-semibold);
  border-bottom-color: transparent;
  background-color: var(--color-accent-light);
  padding-inline: 0.75rem;
  border-radius: var(--radius-sm);
  margin-top: 0.5rem;
}

#philosophy .section__body p:last-child::before {
  content: "=";
  color: var(--color-accent);
}

#philosophy .section__body p:last-child::after {
  content: "✓";
  color: var(--color-accent);
}

@media (max-width: 768px) {
  #philosophy .container {
    grid-template-columns: 1fr;
  }
  #philosophy .section__title,
  #philosophy .section__summary,
  #philosophy .section__body {
    grid-column: 1;
    grid-row: auto;
  }
}

/* ---------------------------------------------------------------------------
   3. Topographic Motif (fixed background)
   --------------------------------------------------------------------------- */
.motif {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  color: var(--color-text);
}

.motif svg {
  width: 100%;
  height: 100%;
  will-change: transform;
}

/* ---------------------------------------------------------------------------
   4. Mono utility & theme toggle
   --------------------------------------------------------------------------- */
.mono {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.05em;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.875rem;
  height: 1.875rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  font-size: 0.95rem;
  color: var(--color-text-muted);
  transition: color var(--transition-fast), border-color var(--transition-fast);
  cursor: pointer;
  flex-shrink: 0;
}

.theme-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

/* ---------------------------------------------------------------------------
   5. Hero Section
   --------------------------------------------------------------------------- */
.section--hero {
  padding-top: var(--space-24);
  padding-bottom: var(--space-16);
  min-height: 60vh;
  display: flex;
  align-items: center;
  position: relative;
  isolation: isolate;
}

.section--hero .container {
  position: relative;
  z-index: 1;
}

.hero__tagline {
  font-size: var(--text-label);
  font-weight: var(--weight-semibold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-6);
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.03em;
  max-width: 16ch;
  margin-bottom: var(--space-6);
}

.hero__summary {
  max-width: 50ch;
  font-size: var(--text-summary);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-8);
}

.hero__title em {
  color: var(--color-accent);
  font-style: italic;
  font-weight: 400;
}

.hero__corner {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 3.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

/* ---------------------------------------------------------------------------
   6. Ecosystem / Product Grid — altitude card style
   --------------------------------------------------------------------------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1rem;
  margin-top: var(--space-8);
}

/* Why section — two-column layout matching philosophy */
#why {
  border-top: 1px solid var(--color-border);
}

#why .container {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1rem 3.5rem;
  align-items: start;
}

#why .section__label { grid-column: 1 / -1; }
#why .section__title { grid-column: 1; grid-row: 2; }
#why .section__summary { grid-column: 1; grid-row: 3; max-width: none; }
#why .section__body {
  grid-column: 2;
  grid-row: 2 / 5;
  max-width: none;
  border-top: 1px solid var(--color-border);
}

#why .section__body p {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
  margin-top: 0;
}

#why .section__body p:last-child {
  border-bottom-color: transparent;
}

@media (max-width: 768px) {
  #why .container {
    grid-template-columns: 1fr;
  }
  #why .section__title,
  #why .section__summary,
  #why .section__body {
    grid-column: 1;
    grid-row: auto;
  }
}

/* Altitude product card */
.pcard--altitude {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.pcard--altitude::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, transparent 40%, var(--color-accent-light) 100%);
  opacity: 0;
  transition: opacity var(--transition-normal);
  pointer-events: none;
}

.pcard--altitude:hover { border-color: var(--color-accent); }
.pcard--altitude:hover::before { opacity: 1; }
.pcard--altitude.is-open { border-color: var(--color-accent); }

.pcard--soon { opacity: 0.85; }

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

.pcard__num {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 300;
  line-height: 1;
  color: var(--color-text-muted);
  letter-spacing: -0.04em;
  transition: color var(--transition-fast);
  padding-top: 0.15rem;
}

.pcard--altitude:hover .pcard__num,
.pcard--altitude.is-open .pcard__num { color: var(--color-accent); }

.pcard__head { padding-top: 0.25rem; }

.pcard__name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.pcard__tag {
  font-family: var(--font-display);
  font-size: var(--text-small);
  color: var(--color-text-muted);
  margin-top: 0.2rem;
}

.pcard__category {
  display: inline-flex;
  align-items: center;
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 0.25rem 0.6rem;
  align-self: start;
}

.pcard__toggle {
  width: 30px;
  height: 30px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 300;
  line-height: 1;
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: border-color var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
  margin-top: 0.15rem;
}

.pcard__toggle:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}

.pcard--altitude.is-open .pcard__toggle {
  background-color: var(--color-text);
  color: var(--color-bg);
  border-color: var(--color-text);
}

/* Expand panel — CSS grid-rows trick for smooth animation */
.pcard__expand {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--transition-normal);
}

.pcard--altitude.is-open .pcard__expand {
  grid-template-rows: 1fr;
}

.pcard__expand-inner {
  min-height: 0;
  overflow: hidden;
}

.pcard--altitude.is-open .pcard__expand-inner {
  padding-top: 1.25rem;
  margin-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.pcard__summary {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
}

.pcard__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.9rem;
  color: var(--color-accent);
  font-size: var(--text-small);
  font-weight: var(--weight-semibold);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
}

.pcard__link:hover { color: var(--color-accent-hover); }

.pcard__badge {
  display: inline-block;
  margin-top: 0.9rem;
  font-size: var(--text-label);
  font-family: var(--font-mono);
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ---------------------------------------------------------------------------
   7. Approach — Principles Grid (T027)
   --------------------------------------------------------------------------- */
#approach {
  border-top: 1px solid var(--color-border);
}

.principles-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1px;
  background-color: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: var(--space-8);
}

.princ {
  background-color: var(--color-bg);
  padding: 2rem 1.75rem 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: background-color var(--transition-fast);
}

.princ:hover {
  background-color: var(--color-surface);
}

.princ__num {
  color: var(--color-accent);
  font-weight: var(--weight-semibold);
}

.princ__head {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: var(--weight-semibold);
  letter-spacing: -0.02em;
  color: var(--color-text);
  line-height: var(--leading-snug);
}

.princ__head em {
  color: var(--color-text-muted);
  font-weight: var(--weight-regular);
  font-style: normal;
}

.princ__body {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  margin-top: 0.25rem;
}

/* ---------------------------------------------------------------------------
   8. Closing Section (Climb)
   --------------------------------------------------------------------------- */
.section--closing {
  text-align: center;
  border-top: 1px solid var(--color-border);
}

.section--closing .section__label {
  justify-content: center;
  margin-inline: auto;
  display: flex;
}

.section--closing .section__title,
.section--closing .section__summary {
  display: none;
}

.climb__stack {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  margin: 2rem 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.5rem, 8vw, 6.5rem);
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.climb__line { display: block; }
.climb__line--1 { color: var(--color-text-muted); opacity: 0.6; }
.climb__line--2 { color: var(--color-text-muted); }
.climb__line--3 { color: var(--color-accent); font-style: italic; font-weight: 400; }

.climb__foot {
  color: var(--color-text-muted);
  max-width: 520px;
  margin: 1.5rem auto 3rem;
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.04em;
}

.closing__wordmark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(3rem, 10vw, 8rem);
  line-height: 0.88;
  letter-spacing: -0.05em;
  color: var(--color-text);
  display: block;
  opacity: 0.85;
  margin-top: 0;
}

.closing__wordmark span {
  color: var(--color-text-muted);
  font-weight: 300;
}

/* ---------------------------------------------------------------------------
   9. Consent Banner (T029)
   --------------------------------------------------------------------------- */
.consent-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: linear-gradient(145deg, var(--glass-bg-strong), rgba(233, 246, 255, 0.86));
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-top: 1px solid var(--glass-border);
  box-shadow: 0 -10px 24px rgba(18, 32, 51, 0.09);
  padding: var(--space-6) var(--gutter);
  transform: translateY(0);
  animation: slideUp var(--transition-normal) ease-out;
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to   { transform: translateY(0); }
}

.consent-banner[hidden] { display: none; }

.consent-banner__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
  max-width: var(--max-width);
  margin-inline: auto;
}

.consent-banner__text {
  font-size: var(--text-small);
  color: var(--color-text-muted);
  max-width: 60ch;
}

.consent-banner__actions {
  display: flex;
  gap: var(--space-3);
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .consent-banner__inner {
    justify-content: center;
  }

  .consent-banner__text {
    text-align: center;
  }
}

/* ---------------------------------------------------------------------------
   10. Site Footer
   --------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-8);
  position: relative;
  z-index: 1;
}

.site-footer__top {
  display: flex;
  justify-content: flex-end;
  margin-bottom: var(--space-6);
}

.site-footer__base {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: var(--text-label);
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
}

/* ---------------------------------------------------------------------------
   11. Dark mode section overrides
   --------------------------------------------------------------------------- */

[data-theme="dark"] .product-card:hover {
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4);
  border-color: rgba(56, 189, 248, 0.25);
}

/* ---------------------------------------------------------------------------
   12. Responsive overrides
   --------------------------------------------------------------------------- */
@media (max-width: 600px) {
  .section { padding-block: var(--space-16); }
  .product-grid { grid-template-columns: 1fr; }
  .consent-banner__inner { flex-direction: column; align-items: flex-start; }
  .hero__title { max-width: none; }
}