:root {
  --navy: #1e3a5f;
  --navy-deep: #142a46;
  --amber: #f4a93b;
  --amber-strong: #e0703a;
  --cream: #fff4df;

  --bg: #fbf8f2;
  --surface: #ffffff;
  --band: #f3ece0;
  --text: #1b2533;
  --muted: #5b6676;
  --line: #e4dccd;
  --accent: var(--navy);
  --accent-text: #ffffff;
  --link: #1e4f86;
  --bubble-user: var(--navy);
  --bubble-user-text: #ffffff;
  --bubble-bot: #f4efe6;
  --shadow: 0 18px 50px rgba(30, 58, 95, 0.14);

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1722;
    --surface: #16212f;
    --band: #131d2a;
    --text: #e8edf3;
    --muted: #9aa7b8;
    --line: #26344a;
    --accent: var(--amber);
    --accent-text: #1b2533;
    --link: #f4b85c;
    --bubble-user: #2b4a73;
    --bubble-user-text: #ffffff;
    --bubble-bot: #1f2c3d;
    --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0f1722;
  --surface: #16212f;
  --band: #131d2a;
  --text: #e8edf3;
  --muted: #9aa7b8;
  --line: #26344a;
  --accent: var(--amber);
  --accent-text: #1b2533;
  --link: #f4b85c;
  --bubble-user: #2b4a73;
  --bubble-user-text: #ffffff;
  --bubble-bot: #1f2c3d;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--link);
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin: 0 0 0.6em;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2rem, 4.6vw, 3.2rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 750;
}

h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

p {
  margin: 0 0 1em;
}

.wrap {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 16px;
}

@media (min-width: 720px) {
  .wrap {
    padding: 0 32px;
  }
}

section {
  padding: 72px 0;
}

.band {
  background: var(--band);
}

.eyebrow {
  color: var(--amber-strong);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.8em;
}

.lead {
  color: var(--muted);
  font-size: 1.12rem;
  max-width: 38em;
}

/* Кнопки */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 12px;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 700;
  text-decoration: none;
  border: 2px solid var(--accent);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(30, 58, 95, 0.2);
}

.btn:focus-visible,
.demo-tabs button:focus-visible,
summary:focus-visible,
.topnav a:focus-visible,
.brand:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
}

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

.btn-small {
  min-height: 40px;
  padding: 0 16px;
  font-size: 0.92rem;
}

/* Шапка */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 800;
  font-size: 1.15rem;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
}

.topnav {
  display: none;
  gap: 22px;
  margin-left: auto;
}

.topnav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
}

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

.topbar .btn-small {
  margin-left: auto;
}

@media (min-width: 900px) {
  .topnav {
    display: flex;
  }

  .topbar .btn-small {
    margin-left: 0;
  }
}

@media (max-width: 420px) {
  .topbar .btn-small {
    padding: 0 12px;
    font-size: 0.85rem;
  }
}

/* Перший екран */
.hero {
  padding: 56px 0 72px;
}

.hero-grid {
  display: grid;
  gap: 48px;
  align-items: center;
}

@media (min-width: 960px) {
  .hero {
    padding: 80px 0 96px;
  }

  .hero-grid {
    grid-template-columns: 1.05fr 1fr;
  }
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 14px;
}

.hero-note {
  color: var(--muted);
  font-size: 0.95rem;
}

/* Демо-чат */
.demo {
  min-width: 0;
}

.demo-label {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.demo-tabs {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 10px;
  scrollbar-width: none;
}

.demo-tabs::-webkit-scrollbar {
  display: none;
}

.demo-tabs button {
  flex: 0 0 auto;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
}

.demo-tabs button[aria-selected="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.chat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.chat-head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
}

.chat-head strong,
.chat-head small {
  display: block;
  line-height: 1.3;
}

.chat-head small {
  color: var(--muted);
  font-size: 0.8rem;
}

.chat-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--navy) url("/icon.svg") center / cover no-repeat;
}

.dialog {
  padding: 20px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Без JS видно всі діалоги підряд; з JS — лише обраний */
.js .dialog[hidden] {
  display: none;
}

.js .demo-tabs {
  display: flex;
}

.demo-tabs {
  display: none;
}

.dialog + .dialog {
  border-top: 1px solid var(--line);
}

.js .dialog + .dialog {
  border-top: 0;
}

.msg {
  max-width: 88%;
  margin: 0;
  padding: 11px 15px;
  border-radius: 18px;
  font-size: 0.98rem;
  line-height: 1.5;
}

.msg p,
.msg ul {
  margin: 0;
}

.msg p + p,
.msg p + ul,
.msg ul + p {
  margin-top: 0.55em;
}

.msg ul {
  padding-left: 1.15em;
}

.msg-user {
  align-self: flex-end;
  background: var(--bubble-user);
  color: var(--bubble-user-text);
  border-bottom-right-radius: 6px;
}

.msg-bot {
  align-self: flex-start;
  background: var(--bubble-bot);
  border-bottom-left-radius: 6px;
}

.caption {
  margin: 6px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.typing {
  display: inline-flex;
  gap: 4px;
  padding: 14px 16px;
}

.typing span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--muted);
  animation: typing 1s infinite ease-in-out;
}

.typing span:nth-child(2) {
  animation-delay: 0.15s;
}

.typing span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes typing {
  0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-3px); }
}

.appear {
  animation: appear 0.3s ease both;
}

@keyframes appear {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

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

  .appear,
  .typing span {
    animation: none;
  }

  .btn {
    transition: none;
  }
}

/* Болі */
.pains {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

@media (min-width: 820px) {
  .pains {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
}

.pains li {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
}

.pains strong {
  display: block;
  margin-bottom: 6px;
}

.pains span {
  color: var(--muted);
}

/* Кроки */
.steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 28px;
}

@media (min-width: 820px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }
}

.step-num {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-bottom: 14px;
  border-radius: 12px;
  background: var(--amber);
  color: var(--navy-deep);
  font-weight: 800;
}

.steps p {
  color: var(--muted);
}

/* Приватність */
.band-dark {
  background: var(--navy);
  color: #eef3f9;
}

.band-dark .eyebrow {
  color: var(--amber);
}

.band-dark h2 {
  max-width: 22em;
}

.cards {
  margin-top: 32px;
  display: grid;
  gap: 16px;
}

@media (min-width: 760px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
}

.card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  padding: 24px;
}

.card h3 {
  color: var(--cream);
}

.card p {
  margin: 0;
  color: #c9d5e3;
}

/* Таблиця можливостей */
.table-wrap {
  margin-top: 24px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
}

.abilities {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}

.abilities th,
.abilities td {
  text-align: left;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.abilities th {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.abilities tr:last-child td {
  border-bottom: 0;
}

.abilities td:first-child {
  font-weight: 650;
  white-space: nowrap;
}

.abilities td:last-child {
  color: var(--muted);
}

/* Платформам */
.partners {
  display: grid;
  gap: 32px;
}

@media (min-width: 960px) {
  .partners {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: start;
  }
}

.partner-list {
  margin: 0;
  display: grid;
  gap: 14px;
}

.partner-list div {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px 22px;
}

.partner-list dt {
  font-weight: 700;
  margin-bottom: 4px;
}

.partner-list dd {
  margin: 0;
  color: var(--muted);
}

/* Питання */
.faq {
  max-width: 820px;
}

.faq details {
  border-bottom: 1px solid var(--line);
}

.faq summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 36px 18px 0;
  font-weight: 650;
  position: relative;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--muted);
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  color: var(--muted);
  margin: 0 0 18px;
}

/* Підвал */
.footer {
  border-top: 1px solid var(--line);
  padding: 28px 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}