/* ================================================================
   aiConciergeOS™ — Design System
   Based on: DESIGN.md (Dala / Void aesthetic)
   Typeface: Acronym (Inter fallback while font license is pending)
   ================================================================ */

/* ================================
   VARIABLES — DESIGN SYSTEM TOKENS
================================ */
:root {

  /* --- OFFICIAL TOKENS (DESIGN.md / design-tokens.json) --- */

  /* Colors */
  --color-void:         #000000;
  --color-bone:         #ffffff;
  --color-ash:          #bdbdbd;
  --color-smoke:        #9a9a9a;
  --color-plum-voltage: #8052ff;
  --color-amber-spark:  #ffb829;
  --color-lichen:       #15846e;

  /* Typography — Font Family */
  --font-acronym: 'Acronym', 'Inter', ui-sans-serif, system-ui,
                  -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Typography — Scale */
  --text-caption:        12px;
  --leading-caption:     1.5;
  --tracking-caption:    0.05px;
  --text-body-sm:        14px;
  --leading-body-sm:     1.5;
  --tracking-body-sm:    0.05px;
  --text-subheading:     18px;
  --leading-subheading:  1.5;
  --tracking-subheading: 0.025px;
  --text-heading-sm:     24px;
  --leading-heading-sm:  1.3;
  --tracking-heading-sm: 0.021px;
  --text-heading:        36px;
  --leading-heading:     1.2;
  --tracking-heading:    0.021px;
  --text-heading-lg:     48px;
  --leading-heading-lg:  1.1;
  --tracking-heading-lg: -0.04px;
  --text-display:        78px;
  --leading-display:     0.9;
  --tracking-display:    -0.04px;
  --text-hero:           113px;
  --leading-hero:        0.81;
  --tracking-hero:       -0.04px;

  /* Typography — Weights */
  --font-weight-extralight: 200;
  --font-weight-regular:    400;
  --font-weight-semibold:   600;
  --font-weight-bold:       700;

  /* Spacing */
  --spacing-unit:  6px;
  --spacing-6:     6px;
  --spacing-12:    12px;
  --spacing-18:    18px;
  --spacing-24:    24px;
  --spacing-30:    30px;
  --spacing-36:    36px;
  --spacing-60:    60px;
  --spacing-96:    96px;
  --spacing-120:   120px;

  /* Layout */
  --page-max-width: 1200px;
  --section-gap:    60px;
  --card-padding:   24px;
  --element-gap:    15px;

  /* Border Radius */
  --radius-3xl:     24px;
  --radius-nav:     24px;
  --radius-cards:   24px;
  --radius-buttons: 24px;

  /* Surfaces */
  --surface-void: #000000;

  /* --- COMPATIBILITY ALIASES (existing CSS rules use these — do not remove) --- */
  --void:      var(--color-void);
  --bone:      var(--color-bone);
  --ash:       var(--color-ash);
  --smoke:     var(--color-smoke);
  --violet:    var(--color-plum-voltage);
  --amber:     var(--color-amber-spark);
  --lichen:    var(--color-lichen);
  --font:      var(--font-acronym);
  --radius:    var(--radius-3xl);
  --radius-sm: 12px;
  --max-w:     var(--page-max-width);
  --nav-h:     72px;
  --page-x:    clamp(var(--spacing-24), 4vw, var(--spacing-60));
  --sp-6:      var(--spacing-6);
  --sp-12:     var(--spacing-12);
  --sp-18:     var(--spacing-18);
  --sp-24:     var(--spacing-24);
  --sp-30:     var(--spacing-30);
  --sp-36:     var(--spacing-36);
  --sp-60:     var(--spacing-60);
  --sp-96:     var(--spacing-96);
  --sp-120:    var(--spacing-120);
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  background: var(--void);
  color: var(--bone);
  font-family: var(--font);
  font-weight: 400;
  font-size: 15px;
  line-height: 1.5;
  letter-spacing: 0.025em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a           { color: inherit; text-decoration: none; }
img, canvas { max-width: 100%; display: block; }
button      { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
ul, ol      { list-style: none; }
blockquote  { font-style: normal; }

sup {
  font-size: 0.48em;
  vertical-align: super;
  letter-spacing: 0;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--sp-18);
  background: var(--violet);
  color: var(--bone);
  padding: 8px 16px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  z-index: 999;
  transition: top 0.2s;
}
.skip-link:focus { top: var(--sp-12); }

/* ================================
   TYPOGRAPHY UTILITIES
================================ */
.eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--bone);
  margin-bottom: var(--sp-18);
  display: block;
}
.eyebrow--violet { color: var(--violet); }
.eyebrow--lichen { color: var(--violet); }

/* ================================
   BUTTONS
================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  line-height: 1;
  white-space: nowrap;
  transition: opacity 0.2s ease, transform 0.15s ease;
  cursor: pointer;
  border: 1px solid transparent;
  min-height: 44px;
}
.btn:hover  { opacity: 0.82; transform: translateY(-1px); }
.btn:active { transform: translateY(0); opacity: 1; }
.btn:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 3px;
}

.btn--primary {
  background: var(--violet);
  color: var(--bone);
  border-color: var(--violet);
}

.btn--ghost {
  background: transparent;
  color: var(--bone);
  border-color: rgba(255,255,255,0.18);
}
.btn--ghost:hover {
  border-color: rgba(255,255,255,0.45);
  opacity: 1;
}

.btn--outline {
  background: transparent;
  color: var(--bone);
  border-color: var(--violet);
}
.btn--outline:hover {
  background: rgba(128,82,255,0.08);
  border-color: var(--violet);
  opacity: 1;
}

.btn--full { width: 100%; }

/* ================================
   NAV
================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  height: var(--nav-h);
  transition: background 0.3s ease, border-color 0.3s ease;
}
.nav--scrolled {
  background: rgba(0,0,0,0.94);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.nav__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--page-x);
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--sp-24);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--bone);
  flex-shrink: 0;
}
.nav__logo-mark { flex-shrink: 0; }

.nav__links {
  display: flex;
  gap: var(--sp-30);
  margin-left: auto;
}

.nav__link {
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.021em;
  color: var(--smoke);
  transition: color 0.2s;
  white-space: nowrap;
  padding: 4px 0;
}
.nav__link:hover { color: var(--bone); }
.nav__link:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 3px;
  border-radius: 4px;
}

.nav__cta-group {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: var(--sp-18);
}

/* Hamburger */
.nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  margin-left: auto;
  border-radius: 8px;
}
.nav__toggle span {
  display: block;
  height: 1.5px;
  background: var(--bone);
  border-radius: 1px;
  transition: transform 0.25s cubic-bezier(0.4,0,0.2,1), opacity 0.2s;
  transform-origin: center;
}
.nav__toggle--open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav__toggle--open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav__toggle--open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }
.nav__toggle:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 2px;
}

/* ================================
   MOBILE MENU
================================ */
.mobile-menu {
  position: fixed;
  inset: 0;
  background: var(--void);
  z-index: 190;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-24);
  transform: translateY(-100%);
  transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
  padding: var(--sp-96) var(--sp-36);
}
.mobile-menu--open { transform: translateY(0); }

.mobile-menu__link {
  font-size: 28px;
  font-weight: 200;
  letter-spacing: -0.02em;
  color: var(--bone);
  transition: color 0.2s;
}
.mobile-menu__link:hover { color: var(--violet); }

/* ================================
   HERO
================================ */
.hero {
  min-height: 100svh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding-top: var(--nav-h);
  overflow: hidden;
  position: relative;
}

.hero__content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  /* Left-align to page max-width */
  padding: var(--sp-96) var(--sp-36) var(--sp-96)
    max(var(--sp-36), calc((100vw - var(--max-w)) / 2 + var(--sp-36)));
  position: relative;
  z-index: 2;
  max-width: calc(var(--max-w) / 2 + (100vw - var(--max-w)) / 2);
}

.hero__headline {
  font-size: clamp(48px, 6.5vw, 96px);
  font-weight: 200;
  line-height: 0.88;
  letter-spacing: -0.04em;
  color: var(--bone);
  margin-bottom: var(--sp-30);
}

.hero__body {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0.025em;
  color: var(--ash);
  max-width: 420px;
  margin-bottom: var(--sp-36);
}

.hero__ctas {
  display: flex;
  gap: var(--sp-12);
  flex-wrap: wrap;
}

.hero__ctas .btn { min-width: 158px; }

.hero__visual {
  position: relative;
  overflow: hidden;
}

#hero-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* ================================
   MANIFESTO BAR
================================ */
.manifesto-bar {
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: var(--sp-36) var(--page-x);
}

.manifesto-bar p {
  font-size: clamp(18px, 2vw, 26px);
  font-weight: 200;
  line-height: 1.4;
  letter-spacing: -0.02em;
  color: var(--ash);
  max-width: 880px;
  margin: 0 auto;
}

.manifesto-bar em {
  font-style: normal;
  color: var(--bone);
}

/* ================================
   SECTION BASE
================================ */
.section {
  padding: var(--sp-120) var(--page-x);
}

/* Centered intro block */
.section__inner--centered {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--sp-60);
}

.section__headline {
  font-size: clamp(36px, 5vw, 72px);
  font-weight: 200;
  line-height: 0.93;
  letter-spacing: -0.04em;
  color: var(--bone);
  margin-bottom: var(--sp-24);
}

.section__body {
  font-size: 16px;
  color: var(--ash);
  line-height: 1.6;
  letter-spacing: 0.025em;
}

.section__body--centered {
  max-width: 56ch;
  margin: 0 auto;
}

/* ================================
   PROBLEM SECTION
================================ */
.systems-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-12);
  justify-content: center;
  max-width: 860px;
  margin: 0 auto var(--sp-60);
}

.system-tag {
  padding: 9px 20px;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.025em;
  color: var(--smoke);
  transition: border-color 0.2s, color 0.2s;
  min-height: 44px;
  display: flex;
  align-items: center;
}
.system-tag:hover {
  border-color: rgba(128,82,255,0.4);
  color: var(--ash);
}

.problem-statement {
  text-align: center;
  padding: var(--sp-60) 0 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  max-width: var(--max-w);
  margin: 0 auto;
}

.problem-statement__text {
  font-size: clamp(24px, 3.5vw, 48px);
  font-weight: 200;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--bone);
}

/* ================================
   PLATFORM SECTION
================================ */
.platform__split {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-60);
  align-items: start;
}

.platform__body {
  font-size: 16px;
  color: var(--ash);
  line-height: 1.6;
  margin-bottom: var(--sp-18);
}

.platform__body--highlight {
  color: var(--bone);
  border-left: 1px solid var(--violet);
  padding-left: var(--sp-18);
  margin-top: var(--sp-24);
}

.platform__capabilities {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-6);
  margin-top: var(--sp-30);
}

.capability {
  padding: 6px 14px;
  border: 1px solid rgba(128,82,255,0.3);
  border-radius: var(--radius);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--violet);
  min-height: 34px;
  display: flex;
  align-items: center;
}

/* ================================
   HOW IT WORKS
================================ */
.process-comparison {
  max-width: 860px;
  margin: 0 auto var(--sp-60);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-18);
}

.process-card {
  padding: var(--sp-36);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
}
.process-card--new {
  border-color: rgba(128,82,255,0.28);
  background: rgba(128,82,255,0.025);
}

.process-card__label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--smoke);
  margin-bottom: var(--sp-24);
}
.process-card--new .process-card__label { color: var(--violet); }

.process-steps {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--sp-12);
}

.process-step {
  font-size: 14px;
  font-weight: 600;
  color: var(--smoke);
  letter-spacing: 0.02em;
}
.process-step--active { color: var(--ash); }
.process-step--new {
  color: var(--bone);
  background: rgba(128,82,255,0.12);
  padding: 4px 12px;
  border-radius: var(--radius);
  border: 1px solid rgba(128,82,255,0.3);
}

.process-arrow { color: rgba(255,255,255,0.2); font-size: 14px; }
.process-arrow--active { color: var(--violet); }

/* Digital Twin */
.digital-twin,
.graph-feature {
  max-width: var(--max-w);
  margin: var(--sp-60) auto 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-60);
  align-items: center;
  padding-top: var(--sp-60);
  border-top: 1px solid rgba(255,255,255,0.06);
}

.digital-twin__headline {
  font-size: clamp(28px, 3.5vw, 52px);
  font-weight: 200;
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--bone);
  margin: var(--sp-18) 0 var(--sp-24);
}

.digital-twin__body {
  font-size: 15px;
  color: var(--ash);
  line-height: 1.6;
  margin-bottom: var(--sp-18);
}

.digital-twin__visual {
  height: 360px;
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}

#twin-canvas {
  width: 100%;
  height: 100%;
}

/* Enterprise Graph nodes */
.graph-nodes { display: flex; align-items: center; justify-content: center; }

.graph-nodes__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-12);
  width: 100%;
}

.graph-node {
  padding: 10px 14px;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-align: center;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s, background 0.2s;
}
.graph-node:hover { background: rgba(255,255,255,0.03); }

.graph-node--violet { color: var(--violet); border-color: rgba(128,82,255,0.3); }
.graph-node--amber  { color: var(--amber);  border-color: rgba(255,184,41,0.25); }
.graph-node--lichen { color: var(--lichen); border-color: rgba(21,132,110,0.3); }
.graph-node--bone   { color: var(--smoke);  border-color: rgba(255,255,255,0.1); }

/* ================================
   INTELLIGENCE GRID
================================ */
.intelligence-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-18);
}

.intel-card {
  padding: var(--sp-30);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  transition: border-color 0.25s, background 0.25s;
  display: flex;
  flex-direction: column;
}
.intel-card:hover {
  border-color: rgba(128,82,255,0.3);
  background: rgba(128,82,255,0.025);
}

.intel-card__icon { margin-bottom: var(--sp-18); flex-shrink: 0; }

.intel-card__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--bone);
  margin-bottom: var(--sp-12);
  letter-spacing: 0.01em;
}

.intel-card__body {
  font-size: 13px;
  color: var(--ash);
  line-height: 1.6;
  margin-bottom: var(--sp-18);
  flex: 1;
}

.intel-card__features {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-top: auto;
}

.intel-card__features li {
  font-size: 12px;
  color: var(--smoke);
  letter-spacing: 0.025em;
  padding-left: 14px;
  position: relative;
}
.intel-card__features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--violet);
  opacity: 0.7;
}

/* ================================
   STAKEHOLDER GRID
================================ */
.stakeholder-grid {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--sp-18);
}

.stakeholder-card {
  padding: var(--sp-30) var(--sp-24);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  text-align: center;
  transition: border-color 0.25s, background 0.25s;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.stakeholder-card:hover {
  border-color: #8052ff;
  background: rgba(21,132,110,0.02);
}

.stakeholder-card__icon {
  margin-bottom: var(--sp-18);
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.stakeholder-card__role {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--bone);
  margin-bottom: var(--sp-12);
}

.stakeholder-card__desc {
  font-size: 13px;
  color: var(--ash);
  line-height: 1.6;
}

/* ================================
   NETWORK / FLYWHEEL
================================ */
.section--network {
  border-top: 1px solid rgba(255,255,255,0.06);
  position: relative;
  overflow: hidden;
}

.globe-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  opacity: 0.40;
  z-index: 0;
}

.section--network > *:not(.globe-canvas) {
  position: relative;
  z-index: 1;
}

.flywheel {
  max-width: 900px;
  margin: 0 auto var(--sp-60);
}

.flywheel__ring {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-18);
  flex-wrap: wrap;
}

.flywheel__node {
  padding: var(--sp-18) var(--sp-24);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius);
  min-width: 140px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.25s, background 0.25s;
  min-height: 44px;
  justify-content: center;
}
.flywheel__node:hover {
  border-color: var(--violet);
  background: rgba(128,82,255,0.06);
}

.flywheel__number {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--violet);
  display: block;
}

.flywheel__label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--bone);
}

.flywheel__arrow {
  font-size: 18px;
  color: var(--violet);
  font-weight: 200;
  flex-shrink: 0;
}

.flywheel__arrow--return {
  color: var(--amber);
  display: inline-block;
}

/* Stats bar */
.network-stats {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  overflow: hidden;
}

.stat {
  padding: var(--sp-36) var(--sp-24);
  text-align: center;
  border-right: 1px solid rgba(255,255,255,0.08);
  transition: background 0.25s;
}
.stat:last-child { border-right: none; }
.stat:hover { background: rgba(255,255,255,0.02); }

.stat__number {
  font-size: clamp(32px, 4vw, 56px);
  font-weight: 200;
  letter-spacing: -0.04em;
  color: var(--bone);
  line-height: 1;
  margin-bottom: var(--sp-12);
}

.stat__label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--smoke);
}

/* ================================
   CONTACT
================================ */
.contact__split {
  max-width: var(--max-w);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-60);
  align-items: start;
}

.contact__body {
  font-size: 15px;
  color: var(--ash);
  line-height: 1.6;
  margin-bottom: var(--sp-30);
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: var(--sp-12);
}

.contact__link {
  font-size: 14px;
  color: var(--smoke);
  letter-spacing: 0.025em;
  transition: color 0.2s;
}
.contact__link:hover { color: var(--violet); }

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--sp-18);
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius);
  padding: var(--sp-36);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ash);
}

.required { color: var(--violet); }

.form-input {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  padding: 13px 16px;
  font-family: var(--font);
  font-size: 15px;
  color: var(--bone);
  width: 100%;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
  -webkit-appearance: none;
  appearance: none;
  min-height: 48px;
}
.form-input::placeholder { color: var(--smoke); opacity: 1; }
.form-input:focus {
  border-color: rgba(128,82,255,0.55);
  background: rgba(128,82,255,0.04);
}
.form-input:focus-visible { outline: none; }

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%239a9a9a' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 44px;
  cursor: pointer;
}
.form-select option { background: #111; color: var(--bone); }

.form-textarea {
  resize: vertical;
  min-height: 110px;
  line-height: 1.5;
}

.form-status {
  font-size: 14px;
  line-height: 1.5;
  min-height: 0;
}
.form-status--success { color: var(--lichen); }
.form-status--error   { color: #ff6b6b; }

/* ================================
   FOOTER
================================ */
.footer {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: var(--sp-60) var(--page-x) var(--sp-36);
}

.footer__inner {
  max-width: var(--max-w);
  margin: 0 auto var(--sp-60);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--sp-60);
  align-items: start;
}

.footer__logo {
  font-size: 17px;
  font-weight: 600;
  color: var(--bone);
  display: block;
  margin-bottom: var(--sp-12);
}

.footer__tagline {
  font-size: 14px;
  color: var(--ash);
  margin-bottom: var(--sp-6);
  line-height: 1.5;
}

.footer__sub {
  font-size: 12px;
  color: var(--smoke);
  letter-spacing: 0.025em;
}

.footer__links {
  display: flex;
  gap: var(--sp-60);
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: var(--sp-12);
}

.footer__col-title {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--bone);
  margin-bottom: var(--sp-6);
}

.footer__link {
  font-size: 13px;
  color: var(--smoke);
  transition: color 0.2s;
}
.footer__link:hover { color: var(--bone); }

.footer__bottom {
  max-width: var(--max-w);
  margin: 0 auto;
  padding-top: var(--sp-24);
  border-top: 1px solid rgba(255,255,255,0.05);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer__legal {
  font-size: 11px;
  color: var(--smoke);
  letter-spacing: 0.02em;
  line-height: 1.6;
  opacity: 0.55;
}

/* ================================
   SCROLL REVEAL ANIMATIONS
================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
[data-reveal-stagger].revealed > * {
  opacity: 1;
  transform: translateY(0);
}
[data-reveal-stagger].revealed > *:nth-child(1)  { transition-delay:   0ms; }
[data-reveal-stagger].revealed > *:nth-child(2)  { transition-delay:  55ms; }
[data-reveal-stagger].revealed > *:nth-child(3)  { transition-delay: 110ms; }
[data-reveal-stagger].revealed > *:nth-child(4)  { transition-delay: 165ms; }
[data-reveal-stagger].revealed > *:nth-child(5)  { transition-delay: 220ms; }
[data-reveal-stagger].revealed > *:nth-child(6)  { transition-delay: 275ms; }
[data-reveal-stagger].revealed > *:nth-child(7)  { transition-delay: 330ms; }
[data-reveal-stagger].revealed > *:nth-child(8)  { transition-delay: 385ms; }
[data-reveal-stagger].revealed > *:nth-child(9)  { transition-delay: 440ms; }
[data-reveal-stagger].revealed > *:nth-child(10) { transition-delay: 495ms; }

@media (prefers-reduced-motion: reduce) {
  [data-reveal],
  [data-reveal-stagger] > * {
    transition: none;
    opacity: 1;
    transform: none;
  }
}

/* ================================
   RESPONSIVE — 1100px
================================ */
@media (max-width: 1100px) {
  .intelligence-grid   { grid-template-columns: repeat(2, 1fr); }
  .stakeholder-grid    { grid-template-columns: repeat(3, 1fr); }
  .network-stats       { grid-template-columns: repeat(2, 1fr); }
}

/* ================================
   RESPONSIVE — 900px
================================ */
@media (max-width: 900px) {
  :root { --sp-120: 80px; }

  .platform__split     { grid-template-columns: 1fr; }
  .digital-twin        { grid-template-columns: 1fr; }
  .graph-feature       { grid-template-columns: 1fr; }
  .contact__split      { grid-template-columns: 1fr; }
  .footer__inner       { grid-template-columns: 1fr; gap: var(--sp-36); }
  .process-comparison  { grid-template-columns: 1fr; }

  .digital-twin__visual { height: 280px; }

  .graph-nodes { margin-top: var(--sp-36); }
  .graph-nodes__grid { grid-template-columns: repeat(3, 1fr); }
}

/* ================================
   RESPONSIVE — 768px (Mobile)
================================ */
@media (max-width: 768px) {
  :root {
    --nav-h: 64px;
    --sp-120: 64px;
  }

  /* Hide desktop nav items, show hamburger */
  .nav__links { display: none; }
  .nav__cta        { display: none; }
  .nav__cta-group  { display: none; }
  .nav__toggle { display: flex; }
  .nav__inner { gap: var(--sp-12); }

  /* Hero: stack vertically */
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero__content {
    padding: var(--sp-60) var(--page-x) var(--sp-36);
    max-width: 100%;
  }

  .hero__visual {
    height: clamp(260px, 55vw, 380px);
  }

  /* Sections */
  .section { padding: var(--sp-60) var(--page-x); }

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

  .flywheel__ring { flex-direction: column; align-items: center; }
  .flywheel__arrow { transform: rotate(90deg); }
  .flywheel__arrow--return { transform: rotate(90deg); }

  .footer__links { flex-direction: column; gap: var(--sp-30); }

  .contact-form { padding: var(--sp-24); }
}

/* ================================
   RESPONSIVE — 480px (Small mobile)
================================ */
@media (max-width: 480px) {
  .hero__headline    { font-size: clamp(40px, 11vw, 56px); }
  .section__headline { font-size: clamp(30px, 9vw, 44px); }

  .stakeholder-grid  { grid-template-columns: 1fr; }
  .network-stats     { grid-template-columns: 1fr 1fr; }

  .hero__ctas        { flex-direction: column; align-items: flex-start; }
  .hero__ctas .btn   { width: 100%; justify-content: center; }

  .problem-statement__text { font-size: clamp(20px, 6vw, 28px); }

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