/* ==========================================================================
   Codapus Studio — Landing page stylesheet
   --------------------------------------------------------------------------
   Sections:
     1. Design tokens (colors, fonts, spacing)
     2. Reset & base elements
     3. Layout primitives (container, sections, reveal)
     4. Header / navigation
     5. Hero
     6. About / Partners / Principles
     7. Capabilities
     8. Contact
     9. Footer
    10. Buttons, icons, utilities
    11. Animations
    12. Responsive (mobile)
   ========================================================================== */


/* 1. ------------------------------- Design tokens ------------------------- */
:root {
  /* Brand palette (HSL kept for easy variants) */
  --c-bg:          hsl(40 43% 98%);
  --c-bg-muted:    hsl(36 43% 93%);
  --c-fg:          hsl(20 38% 13%);
  --c-fg-soft:     hsl(20 38% 13% / 0.70);
  --c-fg-mute:     hsl(20 38% 13% / 0.50);
  --c-fg-faint:    hsl(20 38% 13% / 0.30);
  --c-border:      hsl(35 34% 82%);
  --c-border-soft: hsl(35 34% 82% / 0.50);
  --c-primary:     hsl(13 58% 51%);   /* terracotta */
  --c-secondary:   hsl(33 74% 62%);   /* amber     */

  /* Footer (dark) palette */
  --c-footer-bg:        hsl(20 38% 13%);
  --c-footer-fg:        hsl(40 43% 98%);
  --c-footer-fg-soft:   hsl(40 43% 98% / 0.60);
  --c-footer-fg-mute:   hsl(40 43% 98% / 0.40);
  --c-footer-divider:   hsl(40 43% 98% / 0.10);

  /* Typography */
  --font-sans:    'DM Sans', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-display: 'Fraunces', Georgia, serif;

  /* Layout */
  --container-max: 1200px;
  --container-pad: 1.5rem;
  --section-pad-y: 5rem;
  --header-height: 6rem;

  /* Effects */
  --shadow-card: 0 1px 2px hsl(20 38% 13% / 0.04), 0 0 0 1px var(--c-border);
  --ease-out:    cubic-bezier(0.16, 1, 0.3, 1);
}


/* 2. ------------------------------- Reset & base -------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--c-fg);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

button {
  font: inherit;
  background: none;
  border: 0;
  cursor: pointer;
  color: inherit;
}

input,
textarea {
  font: inherit;
  color: inherit;
}

::selection {
  background: hsl(13 58% 51% / 0.20);
  color: var(--c-primary);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
}


/* 3. -------------------------- Layout primitives ------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.section {
  padding-block: var(--section-pad-y);
}

.section--muted {
  background: hsl(36 43% 93% / 0.50);
}

.section + .section {
  border-top: 1px solid var(--c-border);
}

.section-header {
  max-width: 48rem;
  margin-bottom: 4rem;
}

.section-title {
  font-size: clamp(2.25rem, 4vw, 3rem);
  margin-bottom: 1.5rem;
}

.section-lead {
  font-size: 1.25rem;
  color: var(--c-fg-soft);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.section-body {
  font-size: 1.0625rem;
  color: hsl(20 38% 13% / 0.60);
  line-height: 1.6;
}

.eyebrow {
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-fg-mute);
}

.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;
}


/* 4. ------------------------------- Header / nav ------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-height);
  background: transparent;
  z-index: 50;
  transition: background-color 0.3s var(--ease-out),
              border-color    0.3s var(--ease-out),
              backdrop-filter 0.3s var(--ease-out);
}

.site-header.is-scrolled {
  background: hsl(40 43% 98% / 0.95);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--c-border-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-logo {
  width: 3rem;
  height: 3rem;
  object-fit: contain;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.primary-nav { display: flex; align-items: center; }

.nav-list {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
  padding: 0;
}

.nav-link {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-fg-soft);
  transition: color 0.2s var(--ease-out);
}

.nav-link:hover,
.nav-link:focus-visible { color: var(--c-fg); }

.nav-cta {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  padding: 0.875rem 1.5rem;
  border: 1px solid var(--c-fg);
  color: var(--c-fg);
  transition: background-color 0.3s var(--ease-out),
              color            0.3s var(--ease-out);
}

.nav-cta:hover,
.nav-cta:focus-visible {
  background: var(--c-fg);
  color: var(--c-bg);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  position: relative;
}

.nav-toggle-bar {
  position: absolute;
  left: 0.5rem;
  right: 0.5rem;
  height: 2px;
  background: var(--c-fg);
  transition: transform 0.3s var(--ease-out),
              opacity   0.2s var(--ease-out),
              top       0.3s var(--ease-out);
}
.nav-toggle-bar:nth-child(1) { top: 0.85rem; }
.nav-toggle-bar:nth-child(2) { top: 1.20rem; }
.nav-toggle-bar:nth-child(3) { top: 1.55rem; }

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  top: 1.20rem; transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  top: 1.20rem; transform: rotate(-45deg);
}


/* 5. ------------------------------- Hero -------------------------------- */
.hero {
  position: relative;
  min-height: 75vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + 1rem);
  padding-bottom: 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute; inset: 0;
  pointer-events: none; overflow: hidden;
  z-index: 0;
}

.hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
}
.hero-blob--primary {
  top: -20%; right: -10%;
  width: 60%; height: 60%;
  background: hsl(13 58% 51% / 0.07);
}
.hero-blob--secondary {
  top: 40%; left: -10%;
  width: 40%; height: 40%;
  background: hsl(33 74% 62% / 0.08);
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 56rem;
  text-align: center;
  margin-inline: auto;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-fg-soft);
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeUp 0.8s var(--ease-out) 0.05s forwards;
}

.eyebrow-dot {
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 50%;
  background: hsl(13 58% 51% / 0.80);
}

.hero-title {
  font-size: clamp(3rem, 8vw, 6rem);
  line-height: 1.05;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeUp 0.8s var(--ease-out) 0.18s forwards;
}

.hero-title-soft {
  font-weight: 500;
  color: hsl(20 38% 13% / 0.90);
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  color: var(--c-fg-soft);
  line-height: 1.6;
  max-width: 36rem;
  margin: 0 auto 2.5rem;
  opacity: 0;
  animation: fadeUp 0.8s var(--ease-out) 0.32s forwards;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 3rem;
  opacity: 0;
  animation: fadeUp 0.8s var(--ease-out) 0.45s forwards;
}

.hero-stack {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.5rem 2rem;
  list-style: none;
  padding: 2rem 0 0;
  border-top: 1px solid var(--c-border-soft);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-fg-mute);
  opacity: 0;
  animation: fadeUp 0.8s var(--ease-out) 0.58s forwards;
}

.stack-dot {
  width: 0.25rem;
  height: 0.25rem;
  border-radius: 50%;
  background: hsl(13 58% 51% / 0.30);
}


/* 6. -------------------------- About / Partners ------------------------- */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
}

.partner-card {
  position: relative;
  overflow: hidden;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  padding: 2.5rem;
  box-shadow: var(--shadow-card);
}

.partner-card-corner {
  position: absolute;
  top: 0; right: 0;
  width: 8rem; height: 8rem;
  border-bottom-left-radius: 100%;
  transition: transform 0.7s var(--ease-out);
  z-index: 0;
}
.partner-card-corner--primary   { background: hsl(13 58% 51% / 0.06); }
.partner-card-corner--secondary { background: hsl(33 74% 62% / 0.10); }

.partner-card:hover .partner-card-corner {
  transform: scale(1.5);
}

.partner-card > * { position: relative; z-index: 1; }

.partner-eyebrow {
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-fg-mute);
  margin-bottom: 0.5rem;
}

.partner-title {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.partner-stack {
  font-size: 0.6875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 1.5rem;
}
.partner-stack--primary   { color: var(--c-primary); }
.partner-stack--secondary { color: var(--c-secondary); }

.partner-body {
  color: var(--c-fg-soft);
  line-height: 1.65;
  margin-bottom: 1.5rem;
}

.partner-list {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.partner-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: hsl(20 38% 13% / 0.80);
}

.partner-quote {
  padding-top: 1.5rem;
  border-top: 1px solid var(--c-border-soft);
  font-style: italic;
  font-weight: 500;
  color: var(--c-fg-soft);
  font-size: 0.875rem;
}

.principles {
  border-top: 1px solid var(--c-border);
  padding-top: 3rem;
}

.principles-title {
  font-size: 1.5rem;
  margin-bottom: 2rem;
}

.principles-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.5rem;
}

.principle-number {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 0.5rem;
}

.principle-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0;
  margin-bottom: 0.5rem;
}

.principle-body {
  font-size: 0.875rem;
  color: hsl(20 38% 13% / 0.60);
  line-height: 1.6;
}


/* 7. ------------------------------- Capabilities ------------------------ */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6rem;
}

.capability-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
}
.capability-header h3 { font-size: 1.5rem; }

.capability-header--primary {
  border-bottom: 1px solid hsl(13 58% 51% / 0.20);
}
.capability-header--secondary {
  border-bottom: 1px solid hsl(33 74% 62% / 0.20);
}

.capability-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}
.capability-item:last-child { margin-bottom: 0; }

.capability-item h4 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0;
  margin-bottom: 0.5rem;
}
.capability-item p {
  font-size: 0.875rem;
  color: var(--c-fg-soft);
  line-height: 1.65;
}


/* 8. ------------------------------- Contact ----------------------------- */
.contact-card {
  max-width: 64rem;
  margin-inline: auto;
  display: flex;
  flex-direction: row;
  border: 1px solid var(--c-border);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.contact-info {
  flex: 0 0 41.66%;
  padding: 3rem;
  background: hsl(36 43% 93% / 0.50);
  border-right: 1px solid var(--c-border);
}

.contact-title {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.contact-blurb {
  font-size: 0.9375rem;
  color: var(--c-fg-soft);
  line-height: 1.65;
  margin-bottom: 2.5rem;
}

.contact-block { margin-bottom: 2.5rem; }

.contact-block-label {
  display: block;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-fg-mute);
  margin-bottom: 0.75rem;
}

.engagement-list {
  list-style: none;
  padding: 0; margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: hsl(20 38% 13% / 0.80);
}
.engagement-list li {
  display: flex; align-items: center; gap: 0.5rem;
}

.dot { width: 0.25rem; height: 0.25rem; border-radius: 50%; }
.dot--primary   { background: var(--c-primary); }
.dot--secondary { background: var(--c-secondary); }
.dot--muted     { background: var(--c-fg-faint); }

.contact-block--bordered {
  padding-top: 2rem;
  border-top: 1px solid var(--c-border-soft);
  margin-bottom: 0;
}

.contact-block--bordered .contact-block-label {
  font-size: 0.75rem;
  margin-bottom: 0.5rem;
}

.contact-email {
  font-weight: 500;
  font-size: 1rem;
  transition: color 0.2s var(--ease-out);
}
.contact-email:hover { color: var(--c-primary); }

.contact-form {
  flex: 1;
  padding: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-label {
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-fg-soft);
}

.form-input,
.form-textarea {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  padding: 0.625rem 0.75rem;
  font-size: 0.9375rem;
  color: var(--c-fg);
  transition: border-color 0.2s var(--ease-out);
}

.form-textarea {
  min-height: 10rem;
  resize: none;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--c-fg);
}

.form-input:disabled,
.form-textarea:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  background: hsl(36 43% 93% / 0.40);
}

.form-note {
  font-size: 0.6875rem;
  text-align: center;
  color: var(--c-fg-mute);
  padding-top: 0.25rem;
}
.form-note a {
  color: var(--c-primary);
}
.form-note a:hover { text-decoration: underline; }


/* 9. ------------------------------- Footer ----------------------------- */
.site-footer {
  background: var(--c-footer-bg);
  color: var(--c-footer-fg);
  padding: 4rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 6fr 3fr 3fr;
  gap: 2.5rem;
}

.footer-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--c-footer-fg);
}

.footer-blurb {
  color: var(--c-footer-fg-soft);
  font-size: 0.875rem;
  line-height: 1.65;
  max-width: 24rem;
  margin-bottom: 1.5rem;
}

.footer-email {
  display: inline-block;
  color: var(--c-primary);
  font-weight: 500;
  font-size: 0.875rem;
  transition: color 0.2s var(--ease-out);
}
.footer-email:hover { color: var(--c-footer-fg); }

.footer-col-label {
  display: block;
  font-size: 0.625rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--c-footer-fg-mute);
  margin-bottom: 1.5rem;
}

.footer-links,
.footer-meta {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--c-footer-fg-soft);
}

.footer-links a {
  transition: color 0.2s var(--ease-out);
}
.footer-links a:hover { color: var(--c-primary); }

.footer-bottom {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--c-footer-divider);
  text-align: center;
  font-size: 0.75rem;
  color: var(--c-footer-fg-mute);
}


/* 10. ----------------------- Buttons, icons, utilities ------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  border: 1px solid transparent;
  transition: background-color 0.3s var(--ease-out),
              color            0.3s var(--ease-out),
              border-color     0.3s var(--ease-out);
  cursor: pointer;
}

.btn-primary {
  background: var(--c-fg);
  color: var(--c-bg);
}
.btn-primary:hover:not(:disabled),
.btn-primary:focus-visible:not(:disabled) {
  background: var(--c-primary);
}

.btn-outline {
  background: transparent;
  color: var(--c-fg);
  border-color: var(--c-border);
}
.btn-outline:hover,
.btn-outline:focus-visible {
  border-color: var(--c-fg);
}

.btn-block { width: 100%; height: 3rem; padding: 0; }

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.6;
  cursor: not-allowed;
}

.icon {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
  margin-top: 0.125rem;
}
.icon--lg { width: 1.5rem; height: 1.5rem; margin-top: 0.25rem; }
.icon--inline { margin-top: 0; }
.icon--primary   { color: var(--c-primary); }
.icon--secondary { color: var(--c-secondary); }


/* 11. ------------------------------ Animations ------------------------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* JS adds .is-visible when the element scrolls into view */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-out),
              transform 0.7s var(--ease-out);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .hero-eyebrow,
  .hero-title,
  .hero-subtitle,
  .hero-actions,
  .hero-stack { opacity: 1; }
}


/* 12. ------------------------------ Responsive ------------------------- */
@media (max-width: 900px) {
  .partners-grid     { grid-template-columns: 1fr; gap: 1.5rem; }
  .principles-grid   { grid-template-columns: repeat(2, 1fr); }
  .capabilities-grid { grid-template-columns: 1fr; gap: 3rem; }
  .contact-card      { flex-direction: column; }
  .contact-info      { flex: none; border-right: 0; border-bottom: 1px solid var(--c-border); }
  .footer-grid       { grid-template-columns: 1fr 1fr; }
  .footer-brand      { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  :root { --section-pad-y: 3.5rem; }

  .nav-toggle { display: block; }

  .nav-list {
    position: absolute;
    top: var(--header-height);
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: hsl(40 43% 98% / 0.98);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--c-border);
    padding: 1rem var(--container-pad) 1.5rem;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s var(--ease-out),
                transform 0.2s var(--ease-out);
  }

  .nav-list li {
    width: 100%;
    border-top: 1px solid var(--c-border-soft);
  }
  .nav-list li:first-child { border-top: 0; }

  .nav-link, .nav-cta {
    display: block;
    padding: 1rem 0;
    width: 100%;
    text-align: left;
    border: 0;
  }
  .nav-cta { color: var(--c-primary); padding-top: 1.25rem; }
  .nav-cta:hover { background: transparent; color: var(--c-fg); }

  .primary-nav.is-open .nav-list {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .brand-name        { display: none; }
  .contact-info,
  .contact-form      { padding: 2rem; }
  .partner-card      { padding: 2rem; }
  .principles-grid   { grid-template-columns: 1fr; }
  .footer-grid       { grid-template-columns: 1fr; }
  .form-row          { grid-template-columns: 1fr; }
}