/* ─────────────────────────────────────────────────────────
   KAIROS × ARENAL — styles.css
   Premium static presentation
   ───────────────────────────────────────────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;1,300;1,400&display=swap');

/* ── Variables ─────────────────────────────────────────── */
:root {
  --bg:           #FAFAF8;
  --bg-warm:      #F2F0EB;
  --bg-dark:      #0E0E0C;
  --bg-dark-2:    #161614;

  --text:         #0E0E0C;
  --text-mid:     #555550;
  --text-light:   #8F8F88;
  --text-inv:     #FAFAF8;
  --text-inv-mid: rgba(250,250,248,0.55);

  --accent:       #8C7A5E;
  --border:       #E0DDD6;
  --border-inv:   rgba(255,255,255,0.1);

  --serif:        'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --sans:         -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  --mono:         'Courier New', Courier, monospace;

  --container:    1200px;
  --pad-x:        80px;
  --pad-sec:      120px;

  --ease-out:     cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast:       0.25s;
  --t-mid:        0.5s;
  --t-slow:       0.75s;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

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

/* ── Typography ────────────────────────────────────────── */
.display-title {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(4.5rem, 12vw, 13rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
}

.display-title em {
  font-style: italic;
  font-weight: 300;
}

.section-headline {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
}

.section-headline--light {
  color: var(--text-inv);
}

.section-headline--large {
  font-size: clamp(3rem, 6vw, 5.5rem);
}

.label-text {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-light);
}

.label-text--inv {
  color: var(--text-inv-mid);
}

/* ── Progress Bar ──────────────────────────────────────── */
#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 1px;
  width: 0%;
  background: var(--accent);
  z-index: 100;
  transition: width 0.1s linear;
}

/* ── Left Section Counter ──────────────────────────────── */
#section-counter {
  position: fixed;
  left: 32px;
  bottom: 40px;
  z-index: 90;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  mix-blend-mode: difference;
}

#section-counter .counter-num {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: #fff;
  transition: color var(--t-fast) var(--ease-out);
}

#section-counter .counter-total {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.35);
}

#section-counter .counter-line {
  width: 1px;
  height: 32px;
  background: rgba(255,255,255,0.25);
}

/* ── Nav Dots ──────────────────────────────────────────── */
#nav-dots {
  position: fixed;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
}

.nav-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(14,14,12,0.25);
  cursor: pointer;
  border: none;
  padding: 0;
  transition: background var(--t-fast), transform var(--t-fast);
  position: relative;
}

.nav-dot::before {
  content: '';
  position: absolute;
  inset: -6px;
}

.nav-dot.active {
  background: var(--text);
  transform: scale(1.6);
}

.nav-dot:focus-visible {
  outline: 1px solid var(--accent);
  outline-offset: 3px;
}

/* Invert dots on dark sections */
body.on-dark .nav-dot {
  background: rgba(250,250,248,0.3);
}
body.on-dark .nav-dot.active {
  background: var(--text-inv);
}

/* ── Container ─────────────────────────────────────────── */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

/* ── Section Base ──────────────────────────────────────── */
.section {
  position: relative;
  padding: var(--pad-sec) 0;
}

.section--cover {
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  padding-bottom: 100px;
  background: var(--bg-dark);
}

.section--dark {
  background: var(--bg-dark);
}

.section--warm {
  background: var(--bg-warm);
}

.section--light {
  background: var(--bg);
}

/* ── Section Header ────────────────────────────────────── */
.section-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 56px;
}

.section-meta .num {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--text-light);
}

.section-meta .num--inv {
  color: var(--text-inv-mid);
}

.section-meta .rule {
  flex: 1;
  height: 1px;
  background: var(--border);
  max-width: 48px;
}

.section-meta .rule--inv {
  background: var(--border-inv);
}

.section-meta .lbl {
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-light);
}

.section-meta .lbl--inv {
  color: var(--text-inv-mid);
}

/* ── Reveal Animation ──────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--t-slow) var(--ease-out),
              transform var(--t-slow) var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }
.reveal-delay-7 { transition-delay: 0.7s; }

/* ═══════════════════════════════════════════════════════
   01 — COVER
═══════════════════════════════════════════════════════ */
.cover-inner {
  width: 100%;
}

.cover-kicker {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-inv-mid);
  margin-bottom: 48px;
}

.cover-title-wrap {
  margin-bottom: 48px;
}

.cover-title-wrap .line-1 {
  display: block;
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(5rem, 14vw, 14rem);
  line-height: 0.88;
  letter-spacing: -0.02em;
  color: var(--text-inv);
}

.cover-title-wrap .line-2 {
  display: block;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 300;
  font-size: clamp(5rem, 14vw, 14rem);
  line-height: 0.88;
  letter-spacing: -0.02em;
  color: var(--text-inv-mid);
}

.cover-divider {
  width: 40px;
  height: 1px;
  background: var(--border-inv);
  margin: 40px 0;
}

.cover-subtitle {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  line-height: 1.4;
  color: var(--text-inv);
  margin-bottom: 16px;
}

.cover-note {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-inv-mid);
}

.cover-ecosystem {
  font-size: clamp(0.92rem, 1.3vw, 1.05rem);
  letter-spacing: 0.04em;
  color: rgba(250,250,248,0.6);
  margin-bottom: 20px;
  line-height: 1.5;
}

/* ═══════════════════════════════════════════════════════
   02 — BRIEF
═══════════════════════════════════════════════════════ */
.brief-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: end;
}

.brief-body p {
  font-size: clamp(1.1rem, 1.65vw, 1.3rem);
  line-height: 1.75;
  color: var(--text-mid);
  max-width: 44ch;
}

.brief-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-top: 64px;
}

.brief-card {
  background: var(--bg);
  padding: 36px 32px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.brief-card-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--text-light);
}

.brief-card-text {
  font-family: var(--serif);
  font-size: clamp(1.1rem, 1.6vw, 1.45rem);
  font-weight: 300;
  line-height: 1.35;
  color: var(--text);
}

/* ═══════════════════════════════════════════════════════
   03 — STRATEGIC READING
═══════════════════════════════════════════════════════ */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-top: 64px;
}

.pillar {
  background: var(--bg-warm);
  padding: 48px 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: background var(--t-fast);
}

.pillar:hover {
  background: var(--bg);
}

.pillar-num {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--text-light);
}

.pillar-name {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 2.5vw, 2.8rem);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--text);
}

/* ═══════════════════════════════════════════════════════
   04 — ECOSYSTEM MAP
═══════════════════════════════════════════════════════ */
.ecosystem-layout {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 80px;
  align-items: start;
  margin-top: 64px;
}

.eco-tree {
  font-family: var(--mono);
}

.eco-root {
  font-size: 1rem;
  letter-spacing: 0.08em;
  color: var(--text);
  font-weight: 400;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 0;
}

.eco-branch {
  padding-left: 24px;
  border-left: 1px solid var(--border);
  margin-left: 0;
  padding-top: 24px;
}

.eco-mid {
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  color: var(--text);
  padding-bottom: 20px;
  position: relative;
}

.eco-mid::before {
  content: '└──';
  color: var(--text-light);
  margin-right: 10px;
}

.eco-leaves {
  padding-left: 36px;
  border-left: 1px solid var(--border);
  margin-left: 10px;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.eco-leaf {
  font-size: 0.85rem;
  letter-spacing: 0.06em;
  color: var(--text-mid);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.eco-leaf:last-child {
  border-bottom: none;
}

.eco-leaf::before {
  content: '├──';
  color: var(--text-light);
  margin-right: 10px;
}

.eco-leaf:last-child::before {
  content: '└──';
}

.eco-shared {
  min-width: 220px;
}

.eco-shared-label {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 20px;
}

.eco-venue {
  font-family: var(--serif);
  font-size: 1.85rem;
  font-weight: 300;
  color: var(--text);
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.eco-venue:first-of-type {
  border-top: 1px solid var(--border);
}

/* ═══════════════════════════════════════════════════════
   05 — BRAND DIRECTION
═══════════════════════════════════════════════════════ */
.materials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-inv);
  border: 1px solid var(--border-inv);
  margin-top: 64px;
}

.material-chip {
  background: var(--bg-dark-2);
  padding: 32px 28px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: background var(--t-fast);
}

.material-chip:hover {
  background: #1E1E1C;
}

.swatch {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.swatch--black     { background: #1A1A1A; border: 1px solid rgba(255,255,255,0.08); }
.swatch--wood      { background: linear-gradient(135deg, #7A5C35 0%, #9B7346 50%, #6B4F2C 100%); }
.swatch--cement    { background: linear-gradient(135deg, #B2AFA8 0%, #C5C2BB 50%, #A8A5A0 100%); }
.swatch--duct      { background: repeating-linear-gradient(0deg, #111 0px, #111 3px, #1E1E1E 3px, #1E1E1E 6px); }
.swatch--light     { background: radial-gradient(ellipse at center, #D4A84B 0%, #8B5E1A 100%); }
.swatch--green     { background: #5A6845; }

.material-name {
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  color: var(--text-inv);
  line-height: 1.4;
}

/* ═══════════════════════════════════════════════════════
   06–09 — IMAGE SECTIONS
═══════════════════════════════════════════════════════ */
.image-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 85vh;
  padding: 0;
}

.image-section--reverse {
  direction: rtl;
}

.image-section--reverse > * {
  direction: ltr;
}

.image-section--wide-image {
  grid-template-columns: 2fr 3fr;
}

.image-panel {
  position: relative;
  overflow: hidden;
  background: #141412;
  min-height: 500px;
}

.image-panel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 8s ease-out;
}

.image-panel:hover img {
  transform: scale(1.03);
}

.image-panel.img-missing img {
  opacity: 0;
}

.img-placeholder-text {
  position: absolute;
  bottom: 24px;
  left: 24px;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.4);
  pointer-events: none;
  z-index: 3;
  opacity: 0;
}

.img-missing .img-placeholder-text {
  opacity: 1;
}

.image-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 60px,
      rgba(255,255,255,0.015) 60px,
      rgba(255,255,255,0.015) 61px
    );
  z-index: 1;
  pointer-events: none;
}

.image-panel img {
  position: relative;
  z-index: 2;
}

.text-panel {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px 72px;
}

.section--warm .text-panel {
  background: var(--bg-warm);
}

.text-panel .section-meta {
  margin-bottom: 40px;
}

.text-panel .section-headline {
  margin-bottom: 32px;
}

.text-panel .panel-copy {
  font-size: clamp(1.05rem, 1.5vw, 1.22rem);
  line-height: 1.75;
  color: var(--text-mid);
  max-width: 38ch;
}

/* ═══════════════════════════════════════════════════════
   10 — ACTIVATION SYSTEM
═══════════════════════════════════════════════════════ */
.activation-list {
  margin-top: 64px;
  border-top: 1px solid var(--border);
}

.activation-item {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  align-items: center;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  gap: 24px;
  transition: background var(--t-fast);
}

.activation-item:hover {
  background: var(--bg-warm);
  margin: 0 calc(-1 * var(--pad-x));
  padding: 24px var(--pad-x);
}

.act-letter {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--text-light);
}

.act-name {
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.2vw, 2rem);
  font-weight: 300;
  color: var(--text);
}

.act-dash {
  width: 20px;
  height: 1px;
  background: var(--border);
  transition: width var(--t-fast), background var(--t-fast);
}

.activation-item:hover .act-dash {
  width: 36px;
  background: var(--accent);
}

/* ═══════════════════════════════════════════════════════
   11 — KAIROS PROCESS
═══════════════════════════════════════════════════════ */
.process-sequence {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 1px;
  background: var(--border-inv);
  border: 1px solid var(--border-inv);
}

.process-step {
  background: var(--bg-dark-2);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  transition: background var(--t-fast);
}

.process-step:hover {
  background: #1C1C1A;
}

.process-step:not(:last-child)::after {
  content: '→';
  position: absolute;
  right: -10px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--border-inv);
  font-size: 0.8rem;
  z-index: 1;
}

.ps-num {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--text-inv-mid);
}

.ps-name {
  font-size: 0.92rem;
  line-height: 1.4;
  color: var(--text-inv);
  letter-spacing: 0.02em;
}

.process-copy {
  margin-top: 56px;
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  line-height: 1.6;
  color: var(--text-inv-mid);
  max-width: 64ch;
}

/* ═══════════════════════════════════════════════════════
   12 — NEXT STEP
═══════════════════════════════════════════════════════ */
.next-step-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: end;
  padding-top: 32px;
}

.next-step-body p {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  line-height: 1.75;
  color: var(--text-mid);
  max-width: 44ch;
}

.cta-line {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 16px;
}

.cta-label {
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-light);
}

/* ── Pilot / Final Section ─────────────────────── */
.pilot-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
  padding-top: 32px;
}

.pilot-project {
  font-family: var(--serif);
  font-size: clamp(2rem, 3.5vw, 3.2rem);
  font-weight: 300;
  color: var(--text);
  margin-top: 24px;
  line-height: 1.05;
  letter-spacing: -0.01em;
}

.pilot-closing {
  margin-top: 32px;
  font-size: clamp(0.9rem, 1.15vw, 1rem);
  letter-spacing: 0.04em;
  line-height: 1.8;
  color: var(--text-light);
  border-top: 1px solid var(--border);
  padding-top: 24px;
}

/* ── Next Step Sequence ────────────────────────────── */
.next-step-sequence {
  border-top: 1px solid var(--border);
  margin-bottom: 40px;
}

.nss-item {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 20px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}

.nss-num {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--text-light);
}

.nss-text {
  font-size: 1.05rem;
  color: var(--text-mid);
  letter-spacing: 0.01em;
}

/* ═══════════════════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════════════════ */
.footer {
  background: var(--bg-dark);
  padding: 48px 0;
  border-top: 1px solid var(--border-inv);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-inv);
}

.footer-note {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-inv-mid);
}

/* ═══════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  :root {
    --pad-x: 40px;
    --pad-sec: 80px;
  }

  .process-sequence {
    grid-template-columns: repeat(4, 1fr);
  }

  .process-step:not(:last-child)::after {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --pad-x: 24px;
    --pad-sec: 64px;
  }

  #nav-dots { display: none; }
  #section-counter { left: 16px; }

  .brief-layout { grid-template-columns: 1fr; gap: 40px; }
  .brief-cards  { grid-template-columns: 1fr; }
  .pilot-layout { grid-template-columns: 1fr; gap: 40px; }
  .pillars-grid  { grid-template-columns: repeat(2, 1fr); }

  .ecosystem-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .materials-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .image-section,
  .image-section--wide-image {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .image-section--reverse {
    direction: ltr;
  }

  .image-panel {
    min-height: 300px;
    max-height: 55vw;
  }

  .text-panel {
    padding: 48px 24px;
  }

  .process-sequence {
    grid-template-columns: repeat(2, 1fr);
  }

  .next-step-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .pillars-grid  { grid-template-columns: 1fr; }
  .materials-grid { grid-template-columns: 1fr; }
  .process-sequence { grid-template-columns: 1fr; }
}