/* ─────────────────────────────────────────────────────────────────────────────
   SevenSages.ai — styles.css
   Design tokens → reset → base → utilities → components → sections → responsive
───────────────────────────────────────────────────────────────────────────── */

/* ── 1. Design Tokens ─────────────────────────────────────────────────────── */

:root {
  /* Colour palette */
  --color-primary:      #C04F15;
  --color-bg:           #F7ECE1;
  --color-text:         #595959;
  --color-accent-tan:   #BD8B61;
  --color-sage:         #A7AC9E;
  --color-border-light: #F1D9CB;
  --color-footer-bg:    #000000;

  /* Section background palette — shared by sections and wave dividers */
  --color-section-1: #F5EBE1;  /* warm cream  — hero, approach          */
  --color-section-2: #EDE2D6;  /* dusty rose  — industry shift, benefits */
  --color-section-3: #F3E0CC;  /* peach       — challenge                */
  --color-section-4: #ecdada;  /* sage        — ai platforms             */
  --color-section-5: #EAEAE3;  /* stone       — contact                  */

  /* Typography */
  --font-serif: Georgia, 'Times New Roman', serif;
  --font-sans:  'Helvetica Neue', Helvetica, Arial, system-ui, sans-serif;

  /* Fluid type scale */
  --text-3xl:  clamp(2rem, 5vw, 3.5rem);
  --text-2xl:  clamp(1.875rem, 3.5vw, 2.625rem);
  --text-xl:   clamp(1.375rem, 2.5vw, 1.875rem);
  --text-lg:   clamp(1.125rem, 1.8vw, 1.375rem);
  --text-base: clamp(1rem, 1.4vw, 1.125rem);
  --text-sm:   clamp(0.875rem, 1.2vw, 1rem);
  --text-xs:   clamp(0.75rem, 1vw, 0.875rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-7:  1.75rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --max-width-content: 72rem;
  --max-width-prose:   44rem;
  --section-padding-y: clamp(1vw, 2vw, 6vw);
  --nav-height:        4rem;

  /* Shape */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;

  /* Motion */
  --ease-gentle:   cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --duration-slow: 700ms;
  --duration-base: 400ms;
}


/* ── 2. Reset ─────────────────────────────────────────────────────────────── */

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

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

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

ul {
  list-style: none;
}

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

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


/* ── 3. Base ──────────────────────────────────────────────────────────────── */

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  color: var(--color-primary);
  line-height: 1.2;
}

h1 { font-size: var(--text-3xl); }
h2 {
  font-size: var(--text-2xl); 
  margin-bottom: var(--space-6);
}
h3 { font-size: var(--text-xl); }

p {
  max-width: 70ch;
  line-height: 1.7;
}


/* ── 4. Skip Link ─────────────────────────────────────────────────────────── */

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: var(--color-bg);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
  transition: top var(--duration-base) var(--ease-gentle);
}

.skip-link:focus {
  top: var(--space-4);
}


/* ── 5. Utilities ─────────────────────────────────────────────────────────── */

.container {
  position: relative;
  z-index: 1;
  max-width: var(--max-width-content);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 3rem);
}

.prose {
  max-width: var(--max-width-prose);
}

.mx-auto {
  margin-inline: auto;
}

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

.text-center p {
  margin-inline: auto;
}


/* ── 6. Components ────────────────────────────────────────────────────────── */

/* -- Buttons -- */

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-primary);
  color: var(--color-bg);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-md);
  transition: background var(--duration-base) var(--ease-gentle),
              transform  var(--duration-base) var(--ease-gentle);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary:hover {
  background: rgba(192, 79, 21, 0.85);
  transform: translateY(-1px);
}

.btn-primary:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: transparent;
  color: var(--color-primary);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-6);
  border-radius: var(--radius-md);
  transition: background var(--duration-base) var(--ease-gentle),
              transform  var(--duration-base) var(--ease-gentle);
  text-decoration: none;
  white-space: nowrap;
}

.btn-ghost:hover {
  background: rgba(192, 79, 21, 0.07);
  transform: translateY(-1px);
}

.btn-ghost:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

/* -- Cards -- */

.card {
  background: rgba(247, 236, 225, 0.93);
  border: 1.5px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.card--secondary {
  background: rgba(247, 236, 225, 0.93);
  border: 1.5px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.card--callout {
  background: rgba(189, 139, 97, 0.93);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.card--callout h3,
.card--callout p {
  color: var(--color-bg);
}

/* -- Section Label (eyebrow) -- */

.section-label {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-tan);
  margin-bottom: var(--space-4);
}

/* -- Section Content block -- */

.section-content {
  max-width: var(--max-width-prose);
  margin-inline: auto;
  text-align: center;
}

.section-content h2 {
  margin-bottom: var(--space-6);
}

.section-content p {
  margin-inline: auto;
}

.body-lead {
  color: var(--color-text);
  font-size: var(--text-lg);
  margin-inline: auto;
  line-height: 1.7;
  margin-bottom: 20px;
}

/* -- Pillar Icon -- */

.pillar-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-sm);
  background: rgba(192, 79, 21, 0.79);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  flex-shrink: 0;
}

/* -- Reveal Animation -- */

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity  var(--duration-slow) var(--ease-gentle),
    transform var(--duration-slow) var(--ease-gentle);
}

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


/* ── 7. Section Base ──────────────────────────────────────────────────────── */

.section {
  position: relative;
  overflow: hidden;
  padding-block: var(--section-padding-y);
}

.section::before,
.wave-divider::before,
.site-footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('img/paperTexture.jpg') repeat;
  background-size: 480px auto;
  opacity: 0.5;
  pointer-events: none;
  z-index: 0;
}


/* ── 8. Navigation ────────────────────────────────────────────────────────── */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  transition:
    background var(--duration-base) var(--ease-gentle),
    box-shadow var(--duration-base) var(--ease-gentle);
}

.site-header.is-scrolled {
  background: rgba(247, 236, 225, 0.96);
  box-shadow: 0 1px 0 var(--color-border-light);
}

@supports (backdrop-filter: blur(8px)) {
  .site-header.is-scrolled {
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    background: rgba(247, 236, 225, 0.88);
  }
}

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

.nav-logo {
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo__img {
  width: 1.75rem;
  height: 1.75rem;
  object-fit: cover;
  border-radius: 4px;
}

.nav-logo__wordmark {
  font-family: var(--font-serif);
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.nav-logo__suffix {
  color: var(--color-accent-tan);
}

.btn--nav {
  display: none;
}


/* ── 9. Hero ──────────────────────────────────────────────────────────────── */

.hero {
  position: relative;
  min-height: 100svh;
  min-height: 50vh; /* fallback */
  display: grid;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.hero__bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero::before {
  z-index: 2; /* above hero__bg image and gradient ::after */
}

.hero__content {
  position: relative;
  z-index: 3; /* above image (0), gradient (1), texture (2) */
  width: 100%; /* grid item: must stretch before container constrains to max-width */
  padding-block: var(--space-20);
  padding-top: 15rem;
  padding-bottom: 5rem;
}

.hero__heading {
  font-size: var(--text-3xl);
  max-width: 16ch;
  margin-bottom: var(--space-6);
  line-height: 1.15;
}

.hero__description {
  font-size: var(--text-lg);
  color: var(--color-text);
  max-width: 44ch;
  margin-bottom: var(--space-10);
  line-height: 1.65;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.hero__learn-link {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: opacity var(--duration-base) var(--ease-gentle);
}

.hero__learn-link:hover {
  opacity: 0.7;
}

.hero__learn-link:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Gradient fade at hero bottom so the wave-divider background blends in */
.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: clamp(60px, 10vw, 120px);
  background: linear-gradient(to bottom, transparent 0%, var(--color-section-1) 100%);
  pointer-events: none;
  z-index: 1;
}


/* ── 10. Challenge Section ────────────────────────────────────────────────── */

.section--challenge {
  background: var(--color-section-3);
}

.challenge-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-16);
}

.challenge-item {
  position: relative;
  text-align: center;
  padding-top: calc(var(--space-8) + 1.375rem);
  transition:
    box-shadow var(--duration-base) var(--ease-gentle),
    transform  var(--duration-base) var(--ease-gentle);
}

.challenge-item:hover {
  box-shadow: 0 4px 24px rgba(192, 79, 21, 0.07);
  transform: translateY(-2px);
}

.challenge-item p {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0;
  max-width: none;
}

.challenge-item__number {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-bg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  border: 1.5px solid var(--color-primary);
  color: var(--color-primary);
  font-family: var(--font-serif);
  font-size: var(--text-sm);
  font-weight: normal;
  line-height: 1;
  flex-shrink: 0;
  pointer-events: none;
  user-select: none;
}


/* ── 11. Approach Section ─────────────────────────────────────────────────── */

.section--approach {
  background: var(--color-section-1);
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
}

.approach-layout {
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
}

.approach-text {
  text-align: center;
}

.approach-text h2 {
  margin-bottom: var(--space-6);
  max-width: 28ch;
  margin-inline: auto;
}

.approach-body {
  color: var(--color-text);
  margin-bottom: var(--space-5);
  max-width: 52ch;
  margin-inline: auto;
}

.approach-values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4) var(--space-8);
}

.approach-value {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-left: var(--space-4);
  border-left: 2px solid var(--color-primary);
}

.approach-value__label {
  font-family: var(--font-serif);
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: normal;
}

.approach-value__desc {
  font-size: var(--text-xs);
  color: var(--color-text);
  line-height: 1.5;
}

.approach-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
}

.approach-diagram svg {
  width: 100%;
  max-width: 380px;
  height: auto;
  border-radius: var(--radius-lg);
  padding: 0;
  background: rgba(247, 236, 225, 0.4);
  display: block;
}

.approach-diagram text {
  font-family: var(--font-serif);
  font-size: var(--text-base);
  fill: var(--color-primary);
}


/* ── 12. Industry Shift Section ───────────────────────────────────────────── */

.section--industryShift {
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
  background: var(--color-section-2);
}

.industry-shift__callout {
  margin-inline: auto;
  text-align: center;
  margin-bottom: var(--space-2);
  background: rgba(255, 255, 255, 0.38);
  border-radius: 100rem;
  padding: var(--space-6) var(--space-12);
}



.industry-shift__callout-text {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  color: var(--color-text);
  max-width: none;
  line-height: 1.35;
  margin: 0;
}

.network-canvas-wrap {
  width: min(540px, 100%);
  height: 100px;
  margin-inline: auto;
  margin-block: var(--space-4);
  overflow: hidden;
}

.network-canvas-wrap canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* ── 13. AI Platforms Section ─────────────────────────────────────────────── */

.section--ai-platforms {
  background: var(--color-section-4);
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
}




.ai-platforms-points {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.ai-platforms-point {
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-6);
}

.ai-platforms-point h3 {
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

.ai-platforms-point p {
  font-size: var(--text-sm);
  color: var(--color-text);
  max-width: none;
}

.ai-platforms-point.is-callout {
  background: rgba(189, 139, 97, 0.93);
}

.ai-platforms-point.is-callout p {
  font-family: var(--font-serif);
  font-size: var(--text-base);
  color: var(--color-bg);
  font-style: italic;
  max-width: none;
}


/* ── 14. Benefits Section ─────────────────────────────────────────────────── */

.section--benefits {
  background: var(--color-section-2);
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
}

.benefits-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-16);
}

.benefit-item {
  display: grid;
  grid-template-columns: 2.75rem 1fr;
  column-gap: var(--space-5);
  row-gap: var(--space-2);
  align-items: center;
  padding: var(--space-5) var(--space-6);
  background: rgba(167, 172, 158, 0.58);
  border-radius: var(--radius-md);
}

.benefit-item .challenge-item__number {
  position: static;
  transform: none;
  grid-row: 1 / 3;
  align-self: center;
  background: transparent;
  border-color: var(--color-text);
  color: var(--color-text);
}

.benefit-item h3 {
  font-size: var(--text-lg);
  margin-bottom: 0;
  color: var(--color-primary);
}

.benefit-item p {
  font-size: var(--text-base);
  color: var(--color-text);
  max-width: none;
}


/* ── 14. Credibility Section ──────────────────────────────────────────────── */

.section--credibility {
  background: var(--color-section-1);
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
}

.credibility-proof-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-16);
  margin-bottom: var(--space-12);
}

.credibility-pullquote {
  margin-inline: auto;
  margin-top: var(--space-12);
  margin-bottom: var(--space-16);
  max-width: 44rem;
  text-align: center;
  padding: var(--space-8) var(--space-12);
  background: rgba(255, 255, 255, 0.38);
  border-radius: var(--radius-lg);
}

.credibility-pullquote p {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  color: var(--color-primary);
  font-style: italic;
  max-width: none;
  line-height: 1.4;
  margin: 0;
}


/* ── 15. Contact Section ──────────────────────────────────────────────────── */

.section--contact {
  background: var(--color-section-5);
  padding-block: clamp(2.5rem, 5vw, 4.5rem);
}

.contact-btn {
  margin-top: var(--space-4);
}


/* ── 15. Footer ───────────────────────────────────────────────────────────── */

.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--color-footer-bg);
  color: var(--color-bg);
  padding-block: var(--space-12);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-logo {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  color: var(--color-bg);
}

.footer-tagline {
  font-size: var(--text-sm);
  color: rgba(247, 236, 225, 0.6);
  max-width: 44ch;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-6);
}

.footer-nav a {
  font-size: var(--text-sm);
  color: rgba(247, 236, 225, 0.7);
  text-decoration: none;
  transition: color var(--duration-base) var(--ease-gentle);
}

.footer-nav a:hover {
  color: var(--color-bg);
}

.footer-nav a:focus-visible {
  outline: 2px solid var(--color-accent-tan);
  outline-offset: 3px;
  border-radius: 2px;
}

.footer-legal {
  font-size: var(--text-xs);
  color: rgba(247, 236, 225, 0.45);
}

.footer-sa-logo {
  height: 48px;
  width: auto;
  opacity: 0.8;
}


/* ── 16. Focus styles (global) ────────────────────────────────────────────── */

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


/* ── 17. Wave Dividers ────────────────────────────────────────────────────── */

.wave-divider {
  position: relative;
  height: clamp(48px, 5vw, 72px);
  overflow: hidden;
  line-height: 0;
  flex-shrink: 0;
}

.wave-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* Background = colour of section above; color = fill of section below */
/* industry wave lives outside the hero in flow; negative margin pulls it up to overlap the hero bottom */
.wave-divider--industry     { background: var(--color-section-1); color: var(--color-section-2); }
.wave-divider--challenge    { background: var(--color-section-2); color: var(--color-section-4); }
.wave-divider--ai-platforms { background: var(--color-section-3); color: var(--color-section-4); }
.wave-divider--approach     { background: var(--color-section-4); color: var(--color-section-1); }
.wave-divider--benefits     { background: var(--color-section-1); color: var(--color-section-2); }
.wave-divider--contact      { background: var(--color-section-2); color: var(--color-section-5); }
.wave-divider--credibility  { background: var(--color-section-5); color: var(--color-section-1); }
.wave-divider--footer       { background: var(--color-section-1); color: var(--color-footer-bg); }


/* ── 18. Responsive — Tablet (640px+) ────────────────────────────────────── */

@media (min-width: 40rem) {

  .btn--nav {
    display: inline-flex;
  }

  .challenge-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .benefit-item {
    grid-template-columns: 2.75rem 14rem 1fr;
    column-gap: var(--space-8);
    align-items: center;
  }

  .benefit-item .challenge-item__number {
    grid-row: auto;
    align-self: auto;
  }

  .footer-inner {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    align-items: start;
  }

  .footer-brand {
    grid-column: 1;
    grid-row: 1;
  }

  .footer-nav {
    grid-column: 2;
    grid-row: 1;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-3);
  }

  .footer-legal {
    grid-column: 1 / -1;
    grid-row: 2;
  }
}


/* ── 18. Responsive — Desktop (1152px+) ──────────────────────────────────── */

@media (min-width: 72rem) {

  .approach-layout {
    grid-template-columns: 1fr 1fr;
  }

  .approach-text {
    text-align: left;
  }

  .approach-text h2,
  .approach-body {
    margin-inline: 0;
  }

  .approach-diagram {
    justify-content: flex-end;
  }

  .approach-diagram svg {
    padding: var(--space-8) 0 var(--space-8) var(--space-8);
  }

  .footer-inner {
    grid-template-columns: 1fr auto auto;
    grid-template-rows: auto auto;
    column-gap: var(--space-16);
    align-items: center;
  }

  .footer-brand {
    grid-column: 1;
    grid-row: 1;
  }

  .footer-nav {
    grid-column: 2;
    grid-row: 1;
    flex-direction: row;
    align-items: center;
    gap: var(--space-8);
  }

  .footer-legal {
    grid-column: 1 / -1;
    grid-row: 2;
  }
}


/* ── 20. Reduced Motion ───────────────────────────────────────────────────── */

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

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

  .btn-primary:hover,
  .btn-ghost:hover,
  .challenge-item:hover,
  .benefit-item:hover {
    transform: none;
  }
}