/* Direct Send Message — site styles.
   No frameworks, no external fonts, no network requests. */

:root {
  --brand: #25d366;
  --brand-dark: #128c4a;
  --bg: #ffffff;
  --bg-soft: #f5f7f8;
  --card: #ffffff;
  --text: #10241b;
  --text-soft: #5b6b63;
  --border: #e3e8e6;
  --shadow: 0 2px 12px rgba(16, 36, 27, 0.07);
  --radius: 14px;
  --maxw: 1080px;
}

[data-theme='dark'] {
  --bg: #0f1512;
  --bg-soft: #151d19;
  --card: #171f1b;
  --text: #e9f1ec;
  --text-soft: #9db0a6;
  --border: #26332c;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

a {
  color: var(--brand-dark);
}

[data-theme='dark'] a {
  color: var(--brand);
}

/* ---------- header ---------- */

header {
  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(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  font-size: 1.05rem;
}

.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--brand);
  display: grid;
  place-items: center;
  flex: none;
}

.logo-mark svg {
  width: 19px;
  height: 19px;
  fill: #fff;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  color: var(--text-soft);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.94rem;
}

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

.icon-btn {
  width: 38px;
  height: 38px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 9px;
  cursor: pointer;
  display: grid;
  place-items: center;
  font-size: 1rem;
  flex: none;
}

.icon-btn:hover {
  background: var(--bg-soft);
}

.menu-btn {
  display: none;
}

/* ---------- hero ---------- */

.hero {
  padding: 76px 0 64px;
  text-align: center;
  background:
    radial-gradient(
      circle at 50% 0%,
      color-mix(in srgb, var(--brand) 15%, transparent),
      transparent 62%
    ),
    var(--bg);
}

.badge {
  display: inline-block;
  background: color-mix(in srgb, var(--brand) 16%, transparent);
  color: var(--brand-dark);
  border: 1px solid color-mix(in srgb, var(--brand) 32%, transparent);
  padding: 5px 13px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 20px;
}

[data-theme='dark'] .badge {
  color: var(--brand);
}

h1 {
  font-size: clamp(2rem, 5.2vw, 3.1rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.hero p.lead {
  color: var(--text-soft);
  font-size: 1.12rem;
  max-width: 620px;
  margin: 0 auto 30px;
}

.cta-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 11px;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.98rem;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: var(--brand);
  color: #05130b;
}

.btn-primary:hover {
  background: var(--brand-dark);
  color: #fff;
}

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

.btn-ghost:hover {
  background: var(--bg-soft);
}

/* ---------- demo card ---------- */

.demo {
  margin: 46px auto 0;
  max-width: 380px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 22px;
  text-align: left;
}

.demo h3 {
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.demo .hint {
  color: var(--text-soft);
  font-size: 0.82rem;
  margin-bottom: 16px;
}

.field {
  margin-bottom: 12px;
}

.field label {
  display: block;
  font-size: 0.78rem;
  color: var(--text-soft);
  margin-bottom: 5px;
  font-weight: 600;
}

.field-row {
  display: flex;
  gap: 8px;
}

select,
input,
textarea {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
  font-size: 0.92rem;
}

select {
  width: auto;
  flex: none;
}

textarea {
  resize: vertical;
  min-height: 68px;
}

input:focus,
textarea:focus,
select:focus {
  outline: 2px solid var(--brand);
  outline-offset: 1px;
}

.demo .btn {
  width: 100%;
  justify-content: center;
  margin-top: 4px;
}

.demo-note {
  font-size: 0.76rem;
  color: var(--text-soft);
  text-align: center;
  margin-top: 10px;
}

.error {
  color: #c62828;
  font-size: 0.8rem;
  margin-top: 6px;
  min-height: 1.1em;
}

[data-theme='dark'] .error {
  color: #ff8a80;
}

/* ---------- sections ---------- */

section {
  padding: 64px 0;
}

.alt {
  background: var(--bg-soft);
  border-block: 1px solid var(--border);
}

h2 {
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  text-align: center;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.sub {
  text-align: center;
  color: var(--text-soft);
  max-width: 560px;
  margin: 0 auto 40px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
}

.card .ico {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--brand) 16%, transparent);
  display: grid;
  place-items: center;
  font-size: 1.15rem;
  margin-bottom: 13px;
}

.card h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.card p {
  color: var(--text-soft);
  font-size: 0.9rem;
}

/* ---------- steps ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  counter-reset: step;
}

.step {
  text-align: center;
  padding: 10px;
}

.step .num {
  counter-increment: step;
  width: 42px;
  height: 42px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background: var(--brand);
  color: #05130b;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.step .num::before {
  content: counter(step);
}

.step h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.step p {
  color: var(--text-soft);
  font-size: 0.9rem;
}

/* ---------- privacy callout ---------- */

.callout {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--brand);
  border-radius: var(--radius);
  padding: 26px;
  max-width: 760px;
  margin: 0 auto;
}

.callout h3 {
  margin-bottom: 10px;
}

.callout ul {
  margin: 12px 0 18px 20px;
  color: var(--text-soft);
  font-size: 0.93rem;
}

.callout li {
  margin-bottom: 6px;
}

/* ---------- policy page ---------- */

.doc {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 20px 72px;
}

.doc h1 {
  font-size: clamp(1.7rem, 4vw, 2.3rem);
  text-align: left;
}

.updated {
  display: inline-block;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 7px 13px;
  font-size: 0.82rem;
  color: var(--text-soft);
  margin-bottom: 26px;
}

.doc h2 {
  text-align: left;
  font-size: 1.22rem;
  margin: 34px 0 10px;
  color: var(--brand-dark);
}

[data-theme='dark'] .doc h2 {
  color: var(--brand);
}

.doc p {
  margin-bottom: 14px;
  color: var(--text-soft);
}

.doc strong {
  color: var(--text);
}

.doc ul {
  margin: 0 0 16px 22px;
  color: var(--text-soft);
}

.doc li {
  margin-bottom: 8px;
}

.toc {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px;
  margin-bottom: 30px;
}

.toc strong {
  font-size: 0.86rem;
  display: block;
  margin-bottom: 8px;
}

.toc ol {
  margin-left: 18px;
  font-size: 0.9rem;
}

.toc li {
  margin-bottom: 4px;
}

/* ---------- footer ---------- */

footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 40px 0 30px;
  text-align: center;
}

footer .links {
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

footer .links a {
  color: var(--text-soft);
  text-decoration: none;
  font-size: 0.9rem;
}

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

.disclaimer {
  color: var(--text-soft);
  font-size: 0.8rem;
  max-width: 620px;
  margin: 0 auto 10px;
}

.copyright {
  color: var(--text-soft);
  font-size: 0.8rem;
}

/* ---------- responsive ---------- */

@media (max-width: 640px) {
  .menu-btn {
    display: grid;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 10px 16px 16px;
    gap: 2px;
  }

  .nav-links.open {
    display: flex;
  }

  .hero {
    padding: 52px 0 44px;
  }

  section {
    padding: 48px 0;
  }
}

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