/* Design tokens — light (default) */
:root,
[data-theme="light"] {
  /* Brand palette: #F3000E · #F25016 · #6596F3 · #83B366 · #D3A4EA · #EAD094 · #B2DCE2 · #D7EAAC */
  --color-brand-red: #f3000e;
  --color-brand-orange: #f25016;
  --color-brand-blue: #6596f3;
  --color-brand-green: #83b366;
  --color-brand-purple: #d3a4ea;
  --color-brand-gold: #ead094;
  --color-brand-cyan: #b2dce2;
  --color-brand-lime: #d7eaac;
  --color-bg: #eef6f3;
  --color-surface: #ffffff;
  --color-surface-2: #e8f3f5;
  --color-surface-raised: #f4f8ed;
  --color-border: rgba(131, 179, 102, 0.2);
  --color-divider: rgba(131, 179, 102, 0.1);
  --color-text: #1e2a24;
  --color-text-muted: #4a5c4f;
  --color-text-faint: #7a8f82;
  --color-primary: var(--color-brand-orange);
  --color-primary-hover: #d94512;
  --color-primary-glow: rgba(242, 80, 22, 0.15);
  --color-primary-subtle: rgba(242, 80, 22, 0.07);
  --color-primary-soft: rgba(242, 80, 22, 0.05);
  --color-primary-border: rgba(242, 80, 22, 0.22);
  --color-primary-chip-border: rgba(242, 80, 22, 0.28);
  --color-accent: var(--color-brand-blue);
  --color-accent-subtle: rgba(178, 220, 226, 0.55);
  --color-accent-lime: rgba(215, 234, 172, 0.5);
  --color-success: var(--color-brand-green);
  --color-success-subtle: rgba(131, 179, 102, 0.14);
  --color-error: var(--color-brand-red);
  --color-info: var(--color-brand-blue);
  --color-bg-scrolled: rgba(238, 246, 243, 0.92);
  /* Buttons */
  --color-btn-primary-bg: var(--color-brand-orange);
  --color-btn-primary-hover: #d94512;
  --color-btn-primary-active: #c23d10;
  --color-btn-primary-text: #ffffff;
  --color-btn-primary-border: transparent;
  --color-btn-primary-shadow: 0 4px 14px rgba(242, 80, 22, 0.28);
  --color-btn-ghost-text: #2a4a2e;
  --color-btn-ghost-border: rgba(131, 179, 102, 0.38);
  --color-btn-ghost-hover-bg: rgba(215, 234, 172, 0.45);
  --color-btn-ghost-hover-text: #1f3d28;
  /* Hero mockup + live demo chat — единая гамма */
  --color-mockup-bg: #e2eaed;
  --color-mockup-text: #1a2420;
  --color-mockup-bot-bg: #ffffff;
  --color-mockup-bot-border: rgba(26, 36, 32, 0.14);
  --color-mockup-bot-shadow: 0 1px 4px rgba(26, 36, 32, 0.08);
  --color-mockup-user-bg: #5888d8;
  --color-mockup-user-shadow: 0 2px 8px rgba(88, 136, 216, 0.22);
  --color-msg-user-bg: var(--color-mockup-user-bg);
  --color-msg-user-text: #ffffff;
  --color-msg-user-shadow: var(--color-mockup-user-shadow);
  --color-on-accent: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 40px rgba(242, 80, 22, 0.12);
  --shadow-glow-accent: 0 0 40px rgba(131, 179, 102, 0.16);
  --font-display: "Instrument Serif", Georgia, serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-weight-msg: 400;
  --font-weight-body: 500;
  --font-weight-medium: 600;
  --font-weight-heading: 500;
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  --radius-btn: var(--radius-xl);
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --header-height: 4rem;
  --scroll-offset: 5rem;
  --container-max: 74rem;
}

[data-theme="dark"] {
  --color-bg: #14192a;
  --color-surface: #1e2438;
  --color-surface-2: #252d44;
  --color-surface-raised: #2a334c;
  --color-border: rgba(178, 220, 226, 0.14);
  --color-divider: rgba(178, 220, 226, 0.07);
  --color-text: #e8f4f6;
  --color-text-muted: #b2dce2;
  --color-text-faint: #83b366;
  --color-primary-hover: #ff6a2e;
  --color-primary-glow: rgba(242, 80, 22, 0.16);
  --color-primary-subtle: rgba(242, 80, 22, 0.09);
  --color-primary-soft: rgba(242, 80, 22, 0.06);
  --color-primary-border: rgba(242, 80, 22, 0.3);
  --color-primary-chip-border: rgba(242, 80, 22, 0.34);
  --color-accent-subtle: rgba(101, 150, 243, 0.14);
  --color-accent-lime: rgba(215, 234, 172, 0.1);
  --color-success-subtle: rgba(131, 179, 102, 0.18);
  --color-bg-scrolled: rgba(20, 25, 42, 0.92);
  --color-btn-primary-bg: var(--color-brand-orange);
  --color-btn-primary-hover: #ff6a2e;
  --color-btn-primary-active: #d94512;
  --color-btn-primary-text: #ffffff;
  --color-btn-primary-border: transparent;
  --color-btn-primary-shadow: 0 4px 16px rgba(242, 80, 22, 0.32);
  --color-btn-ghost-text: var(--color-brand-cyan);
  --color-btn-ghost-border: rgba(178, 220, 226, 0.28);
  --color-btn-ghost-hover-bg: rgba(101, 150, 243, 0.12);
  --color-btn-ghost-hover-text: #d7eaac;
  --color-mockup-bg: #1a2238;
  --color-mockup-text: #e8f4f6;
  --color-mockup-bot-bg: #252d44;
  --color-mockup-bot-border: rgba(178, 220, 226, 0.16);
  --color-mockup-bot-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
  --color-mockup-user-bg: #6a94e0;
  --color-mockup-user-shadow: 0 2px 8px rgba(106, 148, 224, 0.28);
  --color-msg-user-bg: var(--color-mockup-user-bg);
  --color-msg-user-text: #ffffff;
  --color-msg-user-shadow: var(--color-mockup-user-shadow);
  --color-on-accent: #ffffff;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 40px rgba(242, 80, 22, 0.14);
  --shadow-glow-accent: 0 0 40px rgba(131, 179, 102, 0.22);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--scroll-offset);
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--font-weight-body);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.18s ease;
}

a:hover { color: var(--color-primary-hover); }

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

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  padding: var(--space-2) var(--space-4);
  background: var(--color-btn-primary-bg);
  color: var(--color-btn-primary-text);
  border-radius: var(--radius-btn);
  font-weight: 600;
}

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

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.container--narrow { max-width: 36rem; }

.section {
  padding-top: var(--space-12);
  padding-bottom: var(--space-8);
}

.section--alt { background: var(--color-surface); }

.section--hero {
  padding-top: calc(var(--header-height) + var(--space-12));
  padding-bottom: var(--space-8);
  background:
    radial-gradient(ellipse 60% 40% at 70% 10%, var(--color-primary-subtle) 0%, transparent 70%),
    radial-gradient(ellipse 50% 35% at 15% 85%, var(--color-accent-lime) 0%, transparent 70%),
    var(--color-bg);
}

.section--cta {
  background:
    radial-gradient(ellipse 50% 60% at 50% 100%, var(--color-primary-subtle) 0%, transparent 70%),
    var(--color-surface);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-weight-heading);
  line-height: 1.2;
  margin: 0 0 var(--space-6);
}

.section-title--center { text-align: center; max-width: none; margin-inline: auto; }

.section-lead {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-body);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-8);
}

.section-lead--center { text-align: center; margin-inline: auto; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin: 0 0 var(--space-4);
}

.eyebrow__icon { display: flex; }

.eyebrow__icon svg { width: 14px; height: 14px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-body);
  border-radius: var(--radius-btn);
  border: none;
  cursor: pointer;
  transition: background 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease, border-color 0.18s ease, color 0.18s ease;
  text-decoration: none;
  min-height: 44px;
}

.btn-primary {
  background: var(--color-btn-primary-bg);
  color: var(--color-btn-primary-text);
  border: 1px solid var(--color-btn-primary-border);
  box-shadow: var(--color-btn-primary-shadow);
}

.btn-primary:hover {
  background: var(--color-btn-primary-hover);
  color: var(--color-btn-primary-text);
  box-shadow: var(--color-btn-primary-shadow), var(--shadow-glow);
}

.btn-primary:active {
  background: var(--color-btn-primary-active);
}

.btn-ghost {
  background: transparent;
  color: var(--color-btn-ghost-text);
  border: 1px solid var(--color-btn-ghost-border);
}

.btn-ghost:hover {
  background: var(--color-btn-ghost-hover-bg);
  border-color: var(--color-btn-ghost-text);
  color: var(--color-btn-ghost-hover-text);
}

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

.btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

/* Nav */
.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  transition: background 0.2s ease, border-color 0.2s ease, backdrop-filter 0.2s ease;
}

.nav-bar.is-scrolled {
  background: var(--color-bg-scrolled);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  text-decoration: none;
  flex-shrink: 0;
}

.logo-name em {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
}

.logo-tag {
  font-weight: 700;
  color: var(--color-primary);
}

.nav-links {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-6);
  margin-left: auto;
}

.nav-links a {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
}

.nav-links a:hover { color: var(--color-text); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: auto;
}

.nav-cta { display: none; }

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-btn);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: border-color 0.18s, color 0.18s;
}

.theme-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.theme-toggle svg { width: 18px; height: 18px; }

[data-theme="dark"] .theme-toggle__icon--sun { display: flex; }
[data-theme="dark"] .theme-toggle__icon--moon { display: none; }
[data-theme="light"] .theme-toggle__icon--sun { display: none; }
[data-theme="light"] .theme-toggle__icon--moon { display: flex; }

.nav-burger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-btn);
  background: transparent;
  cursor: pointer;
}

.nav-burger span {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}

.nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-drawer {
  position: fixed;
  inset: var(--header-height) 0 0 0;
  background: var(--color-bg);
  padding: var(--space-6);
  z-index: 99;
  overflow-y: auto;
}

.nav-drawer__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.nav-drawer__links a {
  display: block;
  font-size: var(--text-lg);
  color: var(--color-text);
  padding: var(--space-3) 0;
}

/* Hero */
.hero-grid {
  display: grid;
  gap: var(--space-8);
  align-items: start;
}

.hero-content {
  animation: hero-in 0.6s ease-out both;
}

@keyframes hero-in {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--font-weight-heading);
  line-height: 1.1;
  margin: 0 0 var(--space-4);
}

.hero-title em { font-style: italic; }

.hero-subhead {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-body);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-6);
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: 0;
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0;
}

.hero-proof__sep { opacity: 0.5; }

.hero-mockup {
  background: var(--color-mockup-bot-bg);
  border: 1px solid var(--color-mockup-bot-border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  width: 100%;
}

.hero-mockup__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
}

.hero-mockup__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-brand-green);
}

.hero-mockup__dot:nth-child(2) { background: var(--color-brand-cyan); }
.hero-mockup__dot:nth-child(3) { background: var(--color-brand-orange); }

.hero-mockup__title {
  margin-left: auto;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.hero-mockup__body {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  background: var(--color-mockup-bg);
}

.hero-mockup__msg {
  width: fit-content;
  max-width: 100%;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-xl);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-msg);
  line-height: 1.5;
}

.hero-mockup__msg p { margin: 0; }

.hero-mockup__text {
  white-space: pre-line;
}

.hero-mockup__msg--user {
  align-self: flex-end;
  background: var(--color-mockup-user-bg);
  color: #ffffff;
  border-bottom-right-radius: var(--radius-sm);
  box-shadow: var(--color-mockup-user-shadow);
}

.hero-mockup__msg--bot {
  align-self: flex-start;
  background: var(--color-mockup-bot-bg);
  color: var(--color-mockup-text);
  border: 1px solid var(--color-mockup-bot-border);
  border-bottom-left-radius: var(--radius-sm);
  box-shadow: var(--color-mockup-bot-shadow);
}

.hero-mockup__msg--typing {
  display: flex;
  gap: 4px;
  align-self: flex-start;
  padding: var(--space-4);
  background: var(--color-mockup-bot-bg);
  border: 1px solid var(--color-mockup-bot-border);
  border-bottom-left-radius: var(--radius-sm);
  box-shadow: var(--color-mockup-bot-shadow);
}

.hero-mockup__msg--typing .typing-dot {
  background: var(--color-brand-green);
  opacity: 0.75;
}

/* Problem */
.section-header {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.section-header .eyebrow,
.section-header .section-title {
  margin: 0;
}

.section-header--center {
  text-align: center;
  align-items: center;
}

.problem-cards {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.problem-card__head {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.problem-card__icon {
  display: flex;
  flex-shrink: 0;
  color: var(--color-error);
}

.problem-card__icon svg { width: 24px; height: 24px; }

.problem-card__title {
  font-size: var(--text-base);
  font-weight: 600;
  margin: 0;
}

.problem-card__text {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.metrics-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  text-align: center;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}

.metric__value {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  line-height: 1.1;
}

.metric__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Timeline */
.timeline {
  list-style: none;
  margin: 0 0 var(--space-12);
  padding: 0 0 0 var(--space-6);
  border-left: 2px solid var(--color-border);
}

.timeline__item {
  position: relative;
  padding-bottom: var(--space-8);
}

.timeline__item:last-child { padding-bottom: 0; }

.timeline__marker {
  position: absolute;
  left: calc(-1 * var(--space-6) - 13px);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-btn-primary-bg);
  color: var(--color-btn-primary-text);
  font-size: var(--text-xs);
  font-weight: 700;
  border-radius: 50%;
}

.timeline__icon {
  display: flex;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.timeline__icon svg { width: 20px; height: 20px; }

.timeline__title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin: 0 0 var(--space-2);
}

.timeline__text {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.integrations__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-4);
}

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

.integration-logo {
  opacity: 0.6;
  transition: opacity 0.18s;
}

.integration-logo:hover { opacity: 1; }

.integration-logo--text {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
}

/* Live demo */
.demo-layout {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.demo-chat {
  width: 100%;
  max-width: min(100%, 64rem);
}

.demo-ticker {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-border);
}

.demo-ticker__label {
  flex-shrink: 0;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  white-space: nowrap;
}

.demo-ticker__viewport {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  height: 2rem;
  mask-image: linear-gradient(
    90deg,
    transparent 0%,
    #000 8%,
    #000 92%,
    transparent 100%
  );
  -webkit-mask-image: linear-gradient(
    90deg,
    transparent 0%,
    #000 8%,
    #000 92%,
    transparent 100%
  );
}

.demo-ticker__track {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  width: max-content;
  animation: demo-ticker-scroll 120s linear infinite;
}

@keyframes demo-ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  white-space: nowrap;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.ticker-persona {
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
}

.ticker-location {
  color: var(--color-text-faint);
  font-size: var(--text-xs);
  max-width: 12rem;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ticker-question {
  font-style: italic;
  color: var(--color-text);
  max-width: 22rem;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ticker-sep {
  color: var(--color-text-faint);
  opacity: 0.6;
  user-select: none;
}

/* Chat widget — визуально как hero-mockup, но контрастнее секции */
.chat-widget {
  --chat-shell-bg: var(--color-surface);
  --chat-thread-bg: #d4e2e8;
  --chat-border: rgba(26, 36, 32, 0.18);
  --chat-assistant-bg: #ffffff;
  --chat-muted-text: #4a5c66;
  --chat-faint-text: #6a7c86;
  --chat-chip-bg: #f3f7f9;
  --chat-chip-border: rgba(26, 36, 32, 0.14);
  --chat-chip-text: #2a3a42;
  --chat-role-active-bg: rgba(101, 150, 243, 0.12);
  --chat-role-active-border: rgba(88, 136, 216, 0.55);
  --chat-role-active-text: #2a4570;
  --chat-source-bg: #eef3f8;
  --chat-source-border: rgba(101, 150, 243, 0.28);
  --chat-source-text: #3d5a80;
  --chat-icon-size: 18px;
  --chat-action-size: 36px;
  background: var(--chat-shell-bg);
  border: 1px solid var(--chat-border);
  border-radius: var(--radius-2xl);
  display: flex;
  flex-direction: column;
  height: min(70vh, 640px);
  min-height: 480px;
  overflow: hidden;
  box-shadow:
    0 8px 28px rgba(26, 36, 32, 0.1),
    0 0 0 1px rgba(255, 255, 255, 0.65) inset;
}

[data-theme="dark"] .chat-widget {
  --chat-shell-bg: #1e2438;
  --chat-thread-bg: #141a2c;
  --chat-border: rgba(178, 220, 226, 0.2);
  --chat-assistant-bg: #252d44;
  --chat-muted-text: #b8c8d0;
  --chat-faint-text: #8fa0aa;
  --chat-chip-bg: #2a3348;
  --chat-chip-border: rgba(178, 220, 226, 0.18);
  --chat-chip-text: #e8f4f6;
  --chat-role-active-bg: rgba(106, 148, 224, 0.18);
  --chat-role-active-border: rgba(106, 148, 224, 0.55);
  --chat-role-active-text: #d7e6ff;
  --chat-source-bg: rgba(101, 150, 243, 0.12);
  --chat-source-border: rgba(101, 150, 243, 0.32);
  --chat-source-text: #b8d0f8;
  box-shadow:
    0 10px 32px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(178, 220, 226, 0.08) inset;
}

.chat-personas {
  padding: var(--space-4);
  border-bottom: 1px solid var(--chat-border, var(--color-mockup-bot-border));
  background: var(--color-surface-2);
}

.chat-personas--compact {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  flex-wrap: wrap;
}

.chat-personas--compact .chat-control-label {
  margin-bottom: 0;
  flex-shrink: 0;
}

.chat-personas--compact .persona-chips {
  flex: 1;
  min-width: 12rem;
}

.chat-input-dock {
  border-top: 1px solid var(--chat-border, var(--color-mockup-bot-border));
  background: var(--chat-shell-bg, var(--color-mockup-bot-bg));
  flex-shrink: 0;
}

.chat-quick {
  padding: var(--space-2) var(--space-3) 0;
  background: transparent;
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  pointer-events: none;
  transition:
    max-height 220ms ease,
    padding 220ms ease,
    opacity 180ms ease;
}

.chat-widget:not(.is-engaged) .chat-quick,
.chat-widget.is-quick-open .chat-quick {
  max-height: 4.5rem;
  padding-top: var(--space-2);
  opacity: 1;
  pointer-events: auto;
}

.chat-widget.is-engaged:not(.is-quick-open) .chat-quick {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  opacity: 0;
  pointer-events: none;
}

.chat-control-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--chat-faint-text, var(--color-text-muted));
  margin-bottom: var(--space-3);
}

.chat-quick .chat-control-label {
  margin-bottom: var(--space-1);
}

.persona-chips {
  display: flex;
  gap: var(--space-1);
}

.chip {
  flex: 1;
  min-width: 0;
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-md);
  border: 1px solid var(--chat-chip-border, var(--color-mockup-bot-border));
  background: var(--chat-chip-bg, var(--color-mockup-bot-bg));
  color: var(--chat-chip-text, var(--color-mockup-text));
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease, box-shadow 180ms ease, color 180ms ease;
  min-height: 2rem;
  text-align: center;
  line-height: 1.25;
}

.chip:hover {
  border-color: var(--chat-role-active-border);
  background: var(--chat-role-active-bg);
  color: var(--chat-role-active-text);
}

.chip.active {
  border-color: var(--chat-role-active-border);
  background: var(--chat-role-active-bg);
  color: var(--chat-role-active-text);
  box-shadow: 0 0 0 1px rgba(88, 136, 216, 0.18);
}

.quick-questions {
  display: flex;
  gap: var(--space-2);
  flex-wrap: nowrap;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: 2px;
}

.quick-questions::-webkit-scrollbar {
  display: none;
}

.quick-btn {
  font-size: var(--text-xs);
  font-weight: var(--font-weight-body);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--chat-chip-border);
  background: var(--chat-chip-bg);
  color: var(--chat-chip-text);
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease, color 180ms ease;
  text-align: left;
  min-height: 2rem;
  flex-shrink: 0;
  white-space: nowrap;
}

.quick-btn:hover {
  border-color: var(--color-primary-border);
  background: var(--color-primary-subtle);
  color: var(--color-text);
}

.chat-thread {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  scroll-behavior: smooth;
  background: var(--chat-thread-bg, var(--color-mockup-bg));
}

.chat-widget:not(.is-engaged) .chat-thread {
  justify-content: center;
  align-items: center;
}

.chat-empty {
  margin: 0;
  max-width: 22rem;
  text-align: center;
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--color-text-muted);
}

.chat-widget.is-engaged .chat-empty {
  display: none;
}

.chat-thread::-webkit-scrollbar { width: 4px; }
.chat-thread::-webkit-scrollbar-track { background: transparent; }
.chat-thread::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 2px; }

.chat-msg {
  display: flex;
  flex-direction: column;
  max-width: 92%;
}

.chat-msg.user {
  align-self: flex-end;
  align-items: flex-end;
  max-width: min(44rem, 96%);
  width: auto;
}

.chat-msg.assistant { align-self: flex-start; align-items: flex-start; width: 100%; max-width: 100%; }

.chat-bubble {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-xl);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-msg);
  line-height: 1.5;
  max-width: 100%;
}

.chat-msg.user .chat-bubble {
  background: var(--color-mockup-user-bg);
  color: #ffffff;
  border-bottom-right-radius: var(--radius-sm);
  box-shadow: var(--color-mockup-user-shadow);
  max-width: 100%;
  width: fit-content;
  min-width: min(100%, 12rem);
}

.chat-msg.assistant .chat-bubble {
  background: var(--chat-assistant-bg, var(--color-mockup-bot-bg));
  color: var(--color-mockup-text);
  border: 1px solid var(--chat-border, var(--color-mockup-bot-border));
  border-bottom-left-radius: var(--radius-sm);
  box-shadow: 0 2px 10px rgba(26, 36, 32, 0.07);
  width: 100%;
}

/* Markdown in assistant messages */
.chat-text.md-content {
  display: block;
}

.chat-msg.assistant .chat-text.chat-text--plain {
  white-space: pre-wrap;
  word-break: break-word;
  tab-size: 2;
  line-height: 1.55;
}

.chat-text.md-content .md-p {
  margin: 0 0 0.65em;
}

.chat-text.md-content .md-p:last-child {
  margin-bottom: 0;
}

.chat-text.md-content .md-h {
  font-size: var(--text-sm);
  font-weight: 600;
  margin: 0.85em 0 0.4em;
  color: var(--color-text);
}

.chat-text.md-content .md-h:first-child {
  margin-top: 0;
}

.chat-text.md-content .md-list {
  margin: 0.4em 0 0.75em;
  padding-left: 1.5em;
  list-style-position: outside;
}

.chat-text.md-content ol.md-list li,
.chat-text.md-content ul.md-list li {
  padding-left: 0.15em;
}

.chat-text.md-content ol.md-list {
  list-style-type: decimal;
}

.chat-text.md-content ul.md-list {
  list-style-type: disc;
}

.chat-text.md-content .md-list--nested {
  margin: 0.35em 0 0.2em;
  padding-left: 1.15em;
}

.chat-text.md-content .md-list--nested ul {
  list-style-type: circle;
}

.chat-text.md-content .md-list:last-child {
  margin-bottom: 0;
}

.chat-text.md-content .md-list li {
  margin-bottom: 0.35em;
}

.chat-text.md-content .md-list li > p.md-p {
  margin: 0 0 0.35em;
}

.chat-text.md-content .md-list li > p.md-p:last-child {
  margin-bottom: 0;
}

.chat-text.md-content li:last-child {
  margin-bottom: 0;
}

.chat-text.md-content strong {
  font-weight: 600;
  color: var(--color-text);
}

.chat-text.md-content em {
  font-style: italic;
}

.chat-text.md-content .md-doc {
  display: inline;
  font-size: 0.92em;
  font-weight: 500;
  line-height: 1.35;
  padding: 0.12em 0.5em;
  border-radius: var(--radius-sm);
  background: var(--chat-source-bg);
  color: var(--chat-source-text);
  border: 1px solid var(--chat-source-border);
  white-space: nowrap;
}

.chat-text.md-content .md-doc::before {
  content: none;
  display: none;
}

.chat-text.md-content .md-list .md-list {
  margin: 0.35em 0 0.2em;
  padding-left: 1.15em;
}

.chat-text.md-content .md-list .md-list ul {
  list-style-type: circle;
}

.chat-text.md-content code {
  font-family: ui-monospace, monospace;
  font-size: 0.9em;
  padding: 0.1em 0.35em;
  border-radius: var(--radius-sm);
  background: var(--color-surface-raised);
}

.chat-sources {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

.source-chip {
  display: inline-flex;
  align-items: center;
  font-size: 11px;
  font-weight: 500;
  line-height: 1.2;
  padding: 4px 10px;
  border-radius: var(--radius-md);
  border: 1px solid var(--chat-source-border);
  color: var(--chat-source-text);
  background: var(--chat-source-bg);
}

.chat-latency {
  font-size: 11px;
  color: var(--chat-faint-text, var(--color-text-faint));
  margin-top: var(--space-1);
  font-variant-numeric: tabular-nums;
}

.typing-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background: var(--chat-muted-text);
  border-radius: 50%;
  margin: 0 2px;
  opacity: 0.75;
  animation: typing-bounce 1.2s infinite ease-in-out;
}

.chat-msg.assistant .chat-bubble .typing-dot {
  background: var(--chat-muted-text);
  opacity: 0.75;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typing-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

.chat-input-form {
  padding: var(--space-2) var(--space-3) var(--space-3);
  background: transparent;
}

.chat-input-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.chat-quick-toggle {
  flex-shrink: 0;
  width: var(--chat-action-size);
  height: var(--chat-action-size);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 1px solid var(--chat-chip-border);
  border-radius: var(--radius-btn);
  background: var(--chat-chip-bg);
  color: var(--chat-muted-text);
  cursor: pointer;
  transition:
    border-color 180ms ease,
    background 180ms ease,
    color 180ms ease,
    box-shadow 180ms ease;
}

.chat-quick-toggle:hover {
  border-color: var(--color-primary-border);
  color: var(--color-primary);
  background: var(--color-primary-subtle);
}

.chat-quick-toggle.is-active,
.chat-widget:not(.is-engaged) .chat-quick-toggle {
  border-color: var(--color-primary-border);
  background: var(--color-primary-subtle);
  color: var(--color-primary);
  box-shadow: 0 0 0 1px rgba(242, 80, 22, 0.12);
}

.chat-widget button svg {
  width: var(--chat-icon-size);
  height: var(--chat-icon-size);
  display: block;
  flex-shrink: 0;
  stroke: currentColor;
}

.chat-input-wrap {
  flex: 1;
  min-width: 0;
  display: flex;
  gap: var(--space-2);
  align-items: center;
  min-height: var(--chat-action-size);
  background: var(--chat-chip-bg);
  border: 1px solid var(--chat-chip-border);
  border-radius: var(--radius-xl);
  padding: 0 var(--space-3);
  transition: border-color 180ms;
}

.chat-input-wrap:focus-within { border-color: var(--color-primary); }

.chat-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: var(--text-sm);
  font-family: var(--font-body);
  color: var(--color-text);
  resize: none;
  line-height: 1.5;
  max-height: 120px;
  overflow-y: auto;
  padding: 8px 0;
  min-height: 20px;
}

.chat-input::placeholder { color: var(--color-text-faint); }

.chat-send {
  background: var(--color-btn-primary-bg);
  border: none;
  border-radius: var(--radius-btn);
  width: var(--chat-action-size);
  height: var(--chat-action-size);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  cursor: pointer;
  flex-shrink: 0;
  transition: background 180ms, box-shadow 180ms;
  color: var(--color-btn-primary-text);
  box-shadow: var(--color-btn-primary-shadow);
}

.chat-send:hover {
  background: var(--color-btn-primary-hover);
  box-shadow: var(--color-btn-primary-shadow), var(--shadow-glow);
}
.chat-send:disabled { opacity: 0.4; cursor: not-allowed; }

.chat-disclaimer {
  font-size: 11px;
  color: var(--color-text-faint);
  margin: var(--space-2) 0 0;
  text-align: center;
}

/* Trust */
.quotes {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-12);
}

.quote {
  margin: 0;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 2px solid var(--color-primary);
  border-radius: var(--radius-xl);
}

.quote__text {
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: 1.5;
}

.quote__source {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.comparison__title {
  font-size: var(--text-lg);
  margin: 0 0 var(--space-4);
}

.comparison-table-wrap { overflow-x: auto; }

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.comparison-table th,
.comparison-table td {
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  text-align: left;
}

.comparison-table th {
  background: var(--color-surface-2);
  font-weight: 600;
}

.comparison-table__ours {
  background: var(--color-primary-soft);
  border-color: var(--color-primary-border);
}

.comparison-icon {
  display: inline-flex;
  vertical-align: middle;
  margin-right: var(--space-2);
}

.comparison-icon--yes { color: var(--color-success); }
.comparison-icon--no { color: var(--color-error); }

/* Roles */
.roles-grid {
  display: grid;
  gap: var(--space-4);
}

.role-card__icon {
  display: flex;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.role-card__icon svg { width: 24px; height: 24px; }

.role-card__title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin: 0 0 var(--space-3);
}

.role-card__list {
  margin: 0 0 var(--space-3);
  padding-left: var(--space-4);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.role-card__example {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* CTA form */
.cta-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.cta-form__field label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  margin-bottom: var(--space-2);
}

.cta-form__field input,
.cta-form__field select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  min-height: 44px;
}

.cta-form__field input:focus,
.cta-form__field select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 0;
}

.cta-form__hint {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-align: center;
  margin: 0;
}

.cta-success {
  text-align: center;
  padding: var(--space-6);
  background: var(--color-success-subtle);
  border: 1px solid var(--color-success);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-8);
}

.cta-success p { margin: 0; color: var(--color-success); }

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

.cta-direct__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-3);
}

.cta-direct__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
}

.cta-direct__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-text);
  font-size: var(--text-sm);
}

.cta-direct__link svg { width: 16px; height: 16px; }

/* Footer */
.site-footer {
  padding-block: var(--space-12) var(--space-6);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer-top {
  display: grid;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer-tagline {
  margin: var(--space-2) 0 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.footer-col__title {
  font-size: var(--text-sm);
  font-weight: 600;
  margin: 0 0 var(--space-3);
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-col li { margin-bottom: var(--space-2); }

.footer-col a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.footer-col a:hover { color: var(--color-text); }

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-bottom p { margin: 0 0 var(--space-2); }

.footer-bottom a { color: var(--color-text-muted); }

.footer-legal { margin: 0; }

/* Page */
.section--page { padding-top: calc(var(--header-height) + var(--space-8)); }

.page-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  margin: 0 0 var(--space-6);
}

.page-content h2 {
  font-size: var(--text-lg);
  margin: var(--space-6) 0 var(--space-3);
}

.page-content p { color: var(--color-text-muted); }

.page-back { margin-top: var(--space-8); }

/* Reveal */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* Responsive */
@media (max-width: 767px) {
  .demo-ticker {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .demo-ticker__viewport {
    width: 100%;
  }

  .ticker-question {
    max-width: 14rem;
  }

  .chat-widget {
    min-height: 460px;
    height: min(70vh, 560px);
  }
}

@media (min-width: 640px) {
  .problem-cards { grid-template-columns: repeat(3, 1fr); }
  .roles-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-columns { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 768px) {
  .section {
    padding-top: var(--space-8);
    padding-bottom: var(--space-8);
  }
  .section--hero {
    padding-top: calc(var(--header-height) + var(--space-8));
    padding-bottom: var(--space-12);
  }
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; }
  .nav-burger { display: none; }
  .nav-actions { margin-left: 0; }
  .hero-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: var(--space-12);
    align-items: start;
  }
  .hero-content {
    padding-top: var(--space-4);
  }

  .hero-mockup {
    margin-inline: 0;
    margin-left: auto;
  }

  .chat-personas--compact .chip {
    font-size: var(--text-sm);
    padding: var(--space-1) var(--space-3);
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .chat-widget.is-engaged:not(.is-quick-open) .chat-quick {
    display: none;
  }
  .demo-ticker__track {
    animation: none;
  }
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; }
}