/* ─────────────────────────────────────────────────────────────────────────────
   Farsight — main.css
   Animatable custom properties (Chrome 85+, Edge 85+, Firefox 128+, Safari 15.4+)
───────────────────────────────────────────────────────────────────────────── */
@property --gradient-angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}
@property --glow-opacity {
  syntax: '<number>';
  initial-value: 0;
  inherits: false;
}

/* ── Tokens ─────────────────────────────────────────────────────────────────── */
:root {
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;

  /* palette — same for both themes */
  --indigo:  #4c8eff;
  --purple:  #60a5fa;
  --pink:    #38bdf8;
  --indigo-d: #1d4ed8;
  --purple-d: #2563eb;
  --pink-d:   #0ea5e9;

  --gradient-base: linear-gradient(var(--gradient-angle), var(--indigo), var(--purple), var(--pink), var(--indigo));

  /* spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-24: 6rem;

  /* radius */
  --r-sm:  6px;
  --r-md:  12px;
  --r-lg:  20px;
  --r-xl:  28px;
  --r-full: 9999px;

  /* transitions */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t-fast: 150ms;
  --t-base: 250ms;
  --t-slow: 400ms;

  /* section gap */
  --section-gap: clamp(4rem, 10vw, 8rem);
}

/* ── Dark theme (default) ───────────────────────────────────────────────────── */
:root,
[data-theme="dark"] {
  --bg:           #07080d;
  --bg-surface:   #0e0f18;
  --bg-elevated:  #141520;
  --bg-glass:     rgba(14 15 24 / 0.7);
  --border:       rgba(255 255 255 / 0.07);
  --border-hover: rgba(255 255 255 / 0.18);
  --text-1:       #eeeef2;
  --text-2:       #9899aa;
  --text-3:       #5c5d6e;
  --accent:       var(--indigo);
  --accent-glow:  rgba(76 142 255 / 0.35);
  --nav-bg:       rgba(7 8 13 / 0.85);
  --badge-bg:     rgba(76 142 255 / 0.12);
  --badge-border: rgba(76 142 255 / 0.3);
  --badge-dot:    #22c55e;
  --input-bg:     rgba(255 255 255 / 0.04);
  --input-focus:  var(--indigo);
  --stat-bg:      rgba(255 255 255 / 0.03);
}

/* ── Light theme ────────────────────────────────────────────────────────────── */
[data-theme="light"] {
  --bg:           #f5f5fb;
  --bg-surface:   #ffffff;
  --bg-elevated:  #eeeef8;
  --bg-glass:     rgba(255 255 255 / 0.8);
  --border:       rgba(0 0 0 / 0.08);
  --border-hover: rgba(0 0 0 / 0.2);
  --text-1:       #0d0d14;
  --text-2:       #4a4a5e;
  --text-3:       #9898a8;
  --accent:       var(--indigo-d);
  --accent-glow:  rgba(29 78 216 / 0.15);
  --nav-bg:       rgba(245 245 251 / 0.85);
  --badge-bg:     rgba(29 78 216 / 0.08);
  --badge-border: rgba(29 78 216 / 0.2);
  --badge-dot:    #16a34a;
  --input-bg:     rgba(0 0 0 / 0.03);
  --input-focus:  var(--indigo-d);
  --stat-bg:      rgba(0 0 0 / 0.03);
}

/* ── Reset ──────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-1);
  background: var(--bg);
  transition: background var(--t-slow) var(--ease-out), color var(--t-slow) var(--ease-out);
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea, select { font-family: inherit; }

/* ── Container ──────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2rem);
}

/* ── Gradient text ──────────────────────────────────────────────────────────── */
.gradient-text {
  background: var(--gradient-base);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: rotateGradient 6s linear infinite;
  background-size: 200% auto;
}

@keyframes rotateGradient {
  to { --gradient-angle: 360deg; }
}

/* ── Buttons ────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.7rem 1.5rem;
  border-radius: var(--r-full);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: transform var(--t-fast) var(--ease-spring),
              box-shadow var(--t-base) var(--ease-out),
              opacity var(--t-base);
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn:active { transform: scale(0.97) !important; }

.btn--primary {
  background: linear-gradient(135deg, var(--indigo-d), var(--indigo));
  color: #fff;
  box-shadow: 0 4px 24px rgba(76 142 255 / 0.35);
}
.btn--primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 32px rgba(76 142 255 / 0.5);
}

.btn--ghost {
  color: var(--text-1);
  border: 1px solid var(--border);
  background: var(--bg-glass);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.btn--ghost:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  background: var(--bg-elevated);
}

.btn--sm  { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn--lg  { padding: 0.875rem 1.875rem; font-size: 1rem; }
.btn--full { width: 100%; justify-content: center; }

/* ── Section shared ─────────────────────────────────────────────────────────── */
.section { padding-block: var(--section-gap); }

.section__label {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.section__title {
  font-size: clamp(1.875rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text-1);
  margin-bottom: var(--space-6);
}

.section__header {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

/* ── Scroll reveal ──────────────────────────────────────────────────────────── */
.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[data-delay="1"] { transition-delay: 100ms; }
.reveal[data-delay="2"] { transition-delay: 200ms; }
.reveal[data-delay="3"] { transition-delay: 300ms; }

/* ══════════════════════════════════════════════════════════════════════════════
   NAV
══════════════════════════════════════════════════════════════════════════════ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background var(--t-base), box-shadow var(--t-base);
}
.nav.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 var(--border);
}
.nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  height: 96px;
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.site-logo { display: block; flex-shrink: 0; }
.nav__logo .site-logo   { width: 80px;  height: 80px;  }
.footer__brand .site-logo { width: 104px; height: 104px; }

/* Links */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
}
.nav__link {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--r-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-2);
  transition: color var(--t-fast), background var(--t-fast);
}
.nav__link:hover { color: var(--text-1); background: var(--bg-elevated); }

/* Controls */
.nav__controls {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.nav__icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--r-sm);
  color: var(--text-2);
  transition: color var(--t-fast), background var(--t-fast);
}
.nav__icon-btn:hover { color: var(--text-1); background: var(--bg-elevated); }
.nav__icon-btn svg { width: 18px; height: 18px; }

/* Theme toggle icons */
.icon-moon { display: none; }
[data-theme="light"] .icon-sun  { display: none; }
[data-theme="light"] .icon-moon { display: block; }

/* Lang button */
.lang-form { display: contents; }
.nav__lang-btn {
  padding: 0.375rem 0.625rem;
  border-radius: var(--r-sm);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-2);
  border: 1px solid var(--border);
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}
.nav__lang-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--badge-bg);
}

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-sm);
}
.nav__hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-2);
  border-radius: 2px;
  transition: transform var(--t-base) var(--ease-out), opacity var(--t-fast);
}
.nav__hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile drawer */
.nav__drawer {
  display: none;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  gap: var(--space-4);
  padding: var(--space-6) clamp(1.25rem, 4vw, 2rem);
  background: var(--nav-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  transform: translateY(-8px);
  opacity: 0;
  transition: transform var(--t-base) var(--ease-out), opacity var(--t-base);
}
.nav__drawer ul { display: flex; flex-direction: column; gap: var(--space-1); }
.nav__drawer .nav__link { display: block; padding: var(--space-3) var(--space-2); font-size: 1rem; }
.nav__drawer.open { transform: none; opacity: 1; }

/* ══════════════════════════════════════════════════════════════════════════════
   HERO
══════════════════════════════════════════════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 96px;
}

.hero__canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

/* Ambient glow orbs */
.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 1;
}
.hero__glow--1 {
  width: 600px; height: 600px;
  top: -10%; left: -5%;
  background: radial-gradient(circle, rgba(76,142,255,0.18) 0%, transparent 70%);
  animation: driftA 18s ease-in-out infinite alternate;
}
.hero__glow--2 {
  width: 500px; height: 500px;
  bottom: 0; right: 5%;
  background: radial-gradient(circle, rgba(96,165,250,0.14) 0%, transparent 70%);
  animation: driftB 22s ease-in-out infinite alternate;
}
.hero__glow--3 {
  width: 300px; height: 300px;
  top: 40%; left: 50%;
  background: radial-gradient(circle, rgba(56,189,248,0.1) 0%, transparent 70%);
  animation: driftC 16s ease-in-out infinite alternate;
}

@keyframes driftA { to { transform: translate(40px, 60px); } }
@keyframes driftB { to { transform: translate(-50px, -40px); } }
@keyframes driftC { to { transform: translate(30px, -50px); } }

.hero__inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-6);
  padding-block: var(--space-24);
  max-width: 780px;
}

/* Badge */
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.375rem 0.875rem;
  border-radius: var(--r-full);
  background: var(--badge-bg);
  border: 1px solid var(--badge-border);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-2);
  animation: fadeSlideDown 0.7s var(--ease-out) 0.1s both;
}
.hero__badge-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--badge-dot);
  box-shadow: 0 0 8px var(--badge-dot);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.7; transform: scale(0.85); }
}

/* Headline */
.hero__headline {
  font-size: clamp(2.5rem, 7vw, 5.25rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.0;
  color: var(--text-1);
  animation: fadeSlideUp 0.8s var(--ease-out) 0.2s both;
}

/* Typewriter */
.hero__sub {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  font-weight: 500;
  color: var(--accent);
  min-height: 2em;
  animation: fadeSlideUp 0.8s var(--ease-out) 0.35s both;
}
.hero__cursor {
  display: inline-block;
  animation: blink 1s step-end infinite;
  margin-left: 2px;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.hero__desc {
  font-size: 1.0625rem;
  color: var(--text-2);
  max-width: 560px;
  line-height: 1.7;
  animation: fadeSlideUp 0.8s var(--ease-out) 0.5s both;
}

.hero__ctas {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  animation: fadeSlideUp 0.8s var(--ease-out) 0.6s both;
}

/* Tech tags */
.hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  animation: fadeSlideUp 0.8s var(--ease-out) 0.7s both;
}
.hero__tags span {
  padding: 0.25rem 0.75rem;
  border-radius: var(--r-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  background: var(--bg-elevated);
  color: var(--text-3);
  border: 1px solid var(--border);
}

/* Scroll indicator */
.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 2;
}
.hero__scroll-line {
  width: 1px;
  height: 56px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollLine 1.8s ease-in-out infinite;
}
@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; opacity: 0; }
  40%  { transform: scaleY(1); transform-origin: top; opacity: 1; }
  60%  { transform: scaleY(1); transform-origin: bottom; opacity: 1; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

/* Hero entrance animations */
@keyframes fadeSlideUp   { from { opacity: 0; transform: translateY(24px); } }
@keyframes fadeSlideDown { from { opacity: 0; transform: translateY(-16px); } }

/* ══════════════════════════════════════════════════════════════════════════════
   SERVICES
══════════════════════════════════════════════════════════════════════════════ */
.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: 1.5rem;
}

.service-card {
  position: relative;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border-radius: var(--r-xl);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  transition: border-color var(--t-base), box-shadow var(--t-base), transform var(--t-base) var(--ease-spring);
  overflow: hidden;
  /* Spotlight effect driven by JS --mouse-x/y */
  background-image: radial-gradient(circle 300px at var(--mouse-x, 50%) var(--mouse-y, 50%),
    rgba(76,142,255,0.07) 0%, transparent 70%);
}
.service-card:hover {
  border-color: rgba(76 142 255 / 0.45);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(76 142 255 / 0.18), 0 0 0 1px rgba(76 142 255 / 0.15);
}

.service-card__icon {
  width: 56px;
  height: 56px;
  margin-bottom: var(--space-6);
}

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-1);
  margin-bottom: var(--space-3);
}
.service-card p {
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: var(--space-6);
  flex: 1;
}
.service-card__link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  transition: gap var(--t-fast);
}
.service-card:hover .service-card__link { gap: var(--space-3); }

/* ══════════════════════════════════════════════════════════════════════════════
   PRINCIPLES
══════════════════════════════════════════════════════════════════════════════ */
.principles {
  background: var(--bg-surface);
}
.principles__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 6vw, 6rem);
  align-items: center;
}
.principles__left .section__title { margin-bottom: var(--space-6); }
.principles__desc {
  color: var(--text-2);
  font-size: 1rem;
  line-height: 1.75;
  margin-bottom: var(--space-8);
}
.principles__right {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.principle {
  display: flex;
  gap: var(--space-6);
  padding: var(--space-6);
  border-radius: var(--r-lg);
  transition: background var(--t-base);
}
.principle:hover { background: var(--bg-elevated); }

.principle__num {
  font-size: 1.75rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  background: var(--gradient-base);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: rotateGradient 6s linear infinite;
  flex-shrink: 0;
  line-height: 1;
  padding-top: 2px;
}
.principle__body h3 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-1);
  margin-bottom: var(--space-2);
}
.principle__body p {
  color: var(--text-2);
  font-size: 0.9375rem;
  line-height: 1.65;
}

/* ══════════════════════════════════════════════════════════════════════════════
   STATS
══════════════════════════════════════════════════════════════════════════════ */
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: clamp(1.75rem, 4vw, 3rem) var(--space-4);
  background: var(--stat-bg);
  background-color: var(--bg-surface);
  gap: var(--space-2);
  transition: background var(--t-base);
}
.stat:hover { background-color: var(--bg-elevated); }

.stat__num-wrap {
  display: flex;
  align-items: baseline;
  gap: 2px;
}
.stat__num {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  background: var(--gradient-base);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: rotateGradient 6s linear infinite;
}
.stat__suf {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 800;
  background: var(--gradient-base);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: rotateGradient 6s linear infinite;
}
.stat__label {
  font-size: 0.875rem;
  color: var(--text-2);
  font-weight: 500;
}

/* ══════════════════════════════════════════════════════════════════════════════
   CONTACT
══════════════════════════════════════════════════════════════════════════════ */
.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: clamp(3rem, 6vw, 6rem);
  align-items: start;
}
.contact__left .section__title { margin-bottom: var(--space-8); }

.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.contact__info-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.9375rem;
  color: var(--text-2);
}
.contact__info-icon {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--accent);
  flex-shrink: 0;
}
.contact__info-icon svg { width: 16px; height: 16px; }
.contact__info-item a { transition: color var(--t-fast); }
.contact__info-item a:hover { color: var(--accent); }

/* Form */
.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.form-group label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-2);
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  background: var(--input-bg);
  color: var(--text-1);
  font-size: 0.9375rem;
  transition: border-color var(--t-fast), box-shadow var(--t-fast), background var(--t-fast);
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--input-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: var(--bg-surface);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-3); }
.form-group input.invalid,
.form-group textarea.invalid { border-color: #ef4444; }

.form__status {
  font-size: 0.875rem;
  border-radius: var(--r-md);
  padding: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--t-base), padding var(--t-base);
}
.form__status.success {
  color: #22c55e;
  background: rgba(34 197 94 / 0.1);
  border: 1px solid rgba(34 197 94 / 0.25);
  padding: var(--space-3) var(--space-4);
  max-height: 80px;
}
.form__status.error {
  color: #ef4444;
  background: rgba(239 68 68 / 0.1);
  border: 1px solid rgba(239 68 68 / 0.25);
  padding: var(--space-3) var(--space-4);
  max-height: 80px;
}

/* ══════════════════════════════════════════════════════════════════════════════
   FAQ
══════════════════════════════════════════════════════════════════════════════ */
.faq__list {
  max-width: 780px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.faq__item {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color var(--t-base), box-shadow var(--t-base);
}
.faq__item[open] {
  border-color: var(--border-hover);
  box-shadow: 0 4px 24px var(--accent-glow);
}

.faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 1.25rem 1.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-1);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background var(--t-fast);
}
.faq__question::-webkit-details-marker { display: none; }
.faq__question:hover { background: var(--bg-elevated); }

.faq__icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--accent);
  transition: transform var(--t-base) var(--ease-out);
}
.faq__item[open] .faq__icon { transform: rotate(180deg); }

.faq__answer {
  padding: 0 1.5rem 1.25rem;
  border-top: 1px solid var(--border);
}
.faq__answer p {
  padding-top: 1rem;
  font-size: 0.9375rem;
  color: var(--text-2);
  line-height: 1.75;
}

/* ══════════════════════════════════════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════════════════════════════════════ */
.footer {
  border-top: 1px solid var(--border);
  padding-block: var(--space-16) var(--space-8);
}
.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-8);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--border);
}
.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer__tagline {
  font-size: 0.875rem;
  color: var(--text-3);
}
.footer__nav {
  display: flex;
  gap: var(--space-6);
}
.footer__nav a {
  font-size: 0.9375rem;
  color: var(--text-2);
  transition: color var(--t-fast);
}
.footer__nav a:hover { color: var(--text-1); }

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3) var(--space-6);
  padding-top: var(--space-6);
}
.footer__legal p {
  font-size: 0.8125rem;
  color: var(--text-3);
}

/* ══════════════════════════════════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .nav__links, .nav__cta { display: none; }
  .nav__hamburger { display: flex; }
  .nav__drawer { display: flex; }
  .nav__drawer.open { display: flex; }

  .nav__inner { height: 64px; }
  .nav__logo .site-logo { width: 52px; height: 52px; }
  .hero { padding-top: 64px; align-items: flex-start; min-height: auto; padding-bottom: 4rem; }

  .principles__inner  { grid-template-columns: 1fr; }
  .contact__inner     { grid-template-columns: 1fr; }
  .stats__grid        { grid-template-columns: repeat(2, 1fr); }
  .footer__inner      { flex-direction: column; align-items: flex-start; }
  .footer__nav        { flex-wrap: wrap; gap: var(--space-3); }
}

@media (max-width: 520px) {
  .hero__ctas    { flex-direction: column; }
  .stats__grid   { grid-template-columns: repeat(2, 1fr); }
  .hero__headline { font-size: 2.25rem; }
}

/* ══════════════════════════════════════════════════════════════════════════════
   CHAT WIDGET
══════════════════════════════════════════════════════════════════════════════ */
.chat-widget {
  position: fixed;
  bottom: var(--space-6);
  right:  var(--space-6);
  z-index: 200;
}

.chat-widget__toggle {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--accent);
  border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(76 142 255 / 0.45);
  transition: transform var(--t-fast), box-shadow var(--t-fast);
  color: #fff;
}
.chat-widget__toggle:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 28px rgba(76 142 255 / 0.6);
}
.chat-widget__toggle svg { width: 22px; height: 22px; }
.chat-widget__toggle .chat-icon-close { display: none; }
.chat-widget__toggle[aria-expanded="true"] .chat-icon-open  { display: none; }
.chat-widget__toggle[aria-expanded="true"] .chat-icon-close { display: block; }

.chat-widget__panel {
  position: absolute;
  bottom: calc(100% + 12px);
  right: 0;
  width: 340px;
  display: flex; flex-direction: column;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: 0 20px 60px rgba(0 0 0 / 0.35);
  opacity: 0;
  transform: translateY(10px) scale(0.97);
  pointer-events: none;
  transition: opacity var(--t-base), transform var(--t-base);
  overflow: hidden;
}
.chat-widget__panel.open {
  opacity: 1; transform: none; pointer-events: auto;
}

.chat-widget__header {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.chat-widget__header-info {
  display: flex; align-items: center; gap: var(--space-2);
  font-size: 0.9375rem; font-weight: 600; color: var(--text-1);
}
.chat-widget__dot {
  width: 8px; height: 8px; border-radius: 50%; background: #22c55e;
  box-shadow: 0 0 6px rgba(34 197 94 / 0.6);
}
.chat-widget__close {
  background: none; border: none; cursor: pointer;
  color: var(--text-2); display: flex; align-items: center;
  padding: 4px; border-radius: var(--r-sm);
  transition: color var(--t-fast), background var(--t-fast);
}
.chat-widget__close:hover { color: var(--text-1); background: var(--bg-elevated); }
.chat-widget__close svg { width: 18px; height: 18px; }

.chat-widget__messages {
  flex: 1; overflow-y: auto;
  padding: var(--space-4);
  display: flex; flex-direction: column; gap: var(--space-3);
  min-height: 220px; max-height: 320px;
}

.chat-msg {
  max-width: 86%; padding: 8px 12px;
  border-radius: 14px; font-size: 0.875rem; line-height: 1.5;
  word-break: break-word;
}
.chat-msg--user {
  align-self: flex-end;
  background: var(--accent); color: #fff;
  border-bottom-right-radius: 4px;
}
.chat-msg--assistant {
  align-self: flex-start;
  background: var(--bg-surface); color: var(--text-1);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
}
.chat-msg--assistant a { color: var(--accent); }
.chat-msg--system {
  align-self: center; max-width: 100%; text-align: center;
  font-size: 0.78rem; color: var(--text-2);
  background: none; padding: 4px 0;
}
.chat-msg--system a { color: var(--accent); }

.chat-msg--typing {
  display: flex; align-items: center; gap: 4px; padding: 12px 14px;
}
.chat-msg--typing span {
  display: block; width: 6px; height: 6px;
  background: var(--text-2); border-radius: 50%;
  animation: chatDot 1.2s infinite;
}
.chat-msg--typing span:nth-child(2) { animation-delay: 0.2s; }
.chat-msg--typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes chatDot {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.35; }
  30% { transform: translateY(-5px); opacity: 1; }
}

.chat-widget__form {
  display: flex; gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border-top: 1px solid var(--border);
  background: var(--bg-surface);
  flex-shrink: 0;
}
.chat-widget__form input {
  flex: 1; background: var(--bg-elevated);
  border: 1px solid var(--border); border-radius: var(--r-sm);
  padding: 8px 12px; font-size: 0.875rem; color: var(--text-1);
  outline: none; transition: border-color var(--t-fast);
}
.chat-widget__form input:focus { border-color: var(--accent); }
.chat-widget__form input:disabled { opacity: 0.5; }
#chatSend {
  background: var(--accent); border: none; border-radius: var(--r-sm);
  width: 36px; height: 36px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: #fff;
  transition: opacity var(--t-fast);
}
#chatSend:hover   { opacity: 0.85; }
#chatSend:disabled { opacity: 0.35; cursor: not-allowed; }
#chatSend svg { width: 15px; height: 15px; }

@media (max-width: 520px) {
  .chat-widget { bottom: var(--space-4); right: var(--space-4); }
  .chat-widget__panel { width: calc(100vw - 2rem); right: calc(-1 * var(--space-4)); }
}

/* ── Chat chips ─────────────────────────────────────────────────────────────── */
.chat-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 2px 0 4px;
}
.chat-chip {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  padding: 5px 14px;
  font-size: 0.8125rem;
  color: var(--text-2);
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), border-color var(--t-fast);
  white-space: nowrap;
}
.chat-chip:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ── Section highlight (triggered by AI) ────────────────────────────────────── */
@keyframes chat-highlight {
  0%   { outline: 3px solid transparent; outline-offset: 8px; }
  20%  { outline: 3px solid var(--accent); outline-offset: 6px; }
  100% { outline: 3px solid transparent; outline-offset: 12px; }
}
.chat-highlight {
  animation: chat-highlight 1.8s var(--ease-out) forwards;
  border-radius: var(--r-md);
}

/* ── Reduced motion ─────────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}