* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: linear-gradient(180deg, #f6fbfb 0%, #f2f5f9 100%);
  color: #172c38;
  font-family: Tahoma, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.9;
}

a { color: #126e67; text-decoration: none; }
button, input, textarea { font: inherit; }
button, a { touch-action: manipulation; }
button { cursor: pointer; }
button:disabled, textarea:disabled { opacity: .5; cursor: not-allowed; }

.topbar {
  height: 84px;
  padding: 0 max(24px, calc((100vw - 1120px) / 2));
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #e4e9ef;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  font-size: 25px;
  font-weight: bold;
  display: flex;
  align-items: center;
  gap: 12px;
  color: #143a39;
}

.brand-icon {
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #14887a 0%, #0d6b67 100%);
  color: white;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  box-shadow: 0 10px 20px rgba(18, 122, 110, .2);
}

nav {
  display: flex;
  gap: 20px;
  align-items: center;
}

nav form { margin: 0; }
.email { font-size: 12px; color: #6b7884; }
.link {
  border: 0;
  background: none;
  color: #6b7884;
  font-weight: 600;
}

.container {
  max-width: 1120px;
  margin: 44px auto;
  padding: 0 24px;
  min-height: 70vh;
}

h1 {
  font-size: clamp(2.2rem, 3vw, 3.5rem);
  line-height: 1.2;
  margin: 8px 0 12px;
  letter-spacing: -.04em;
}

h2 { font-size: 21px; margin: 12px 0; }
h3 { font-size: 22px; margin: 0 0 12px; }
.muted, small { color: #657889; }
.eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .24px;
  color: #168776;
  background: rgba(18, 122, 110, .08);
  border: 1px solid rgba(18, 122, 110, .12);
  border-radius: 999px;
  padding: 7px 12px;
  font-weight: 700;
}

.page-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.primary, .secondary {
  border-radius: 14px;
  padding: 12px 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.primary {
  background: linear-gradient(135deg, #12796e 0%, #0b5f5a 100%);
  color: white;
  border: 0;
  box-shadow: 0 14px 26px rgba(18, 122, 110, .22);
}

.primary:hover { background: linear-gradient(135deg, #0f6d62 0%, #0a514d 100%); transform: translateY(-1px); }
.secondary {
  background: white;
  border: 1px solid #dfe9f1;
  color: #183a3b;
}
.secondary:hover { background: #f8fbfb; transform: translateY(-1px); }

.wide { width: 100%; margin-top: 24px; }
.notice {
  background: linear-gradient(135deg, #fff9ef 0%, #fff1d6 100%);
  color: #77561c;
  padding: 16px 20px;
  border-radius: 12px;
  margin: 24px 0;
  border: 1px solid rgba(122, 91, 22, .12);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin: 32px 0;
}

.stats article {
  padding: 20px 24px;
  background: white;
  border: 1px solid #e2e9ef;
  border-radius: 18px;
  display: flex;
  gap: 16px;
  align-items: center;
  box-shadow: 0 14px 34px rgba(36, 53, 69, .04);
}

.stats strong { font-size: 30px; color: #146e66; }
.stats span { font-size: 13px; color: #6a7b89; }

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.assistant-card {
  background: white;
  padding: 24px;
  border: 1px solid #e2e9ef;
  border-radius: 18px;
  color: #172c38;
  transition: transform .15s ease, box-shadow .2s ease, border-color .2s ease;
  box-shadow: 0 12px 24px rgba(11, 30, 37, .04);
}

.assistant-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 36px rgba(11, 30, 37, .07);
  border-color: #cfe4e8;
}

.assistant-card .avatar {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 16px;
  background: linear-gradient(135deg, #ebf9f6 0%, #dff3f0 100%);
  color: #126e67;
  font-size: 22px;
  margin-bottom: 14px;
}

.assistant-card .badge, .panel-card .badge {
  display: inline-block;
  background: rgba(18, 122, 110, .09);
  color: #115f5e;
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 11px;
  font-weight: 700;
}

.card-action {
  display: inline-block;
  margin-top: 18px;
  color: #0d655e;
  font-weight: 700;
}

.empty {
  text-align: center;
  background: white;
  border: 1px solid #e0e8ef;
  border-radius: 22px;
  padding: 54px 24px;
}

.orb {
  width: 74px;
  height: 74px;
  border-radius: 18px;
  background: linear-gradient(135deg, #f1fdf9 0%, #dff4f2 100%);
  color: #12796e;
  display: grid;
  place-items: center;
  margin: 0 auto 18px;
  font-size: 32px;
  box-shadow: inset 0 0 0 1px rgba(18, 122, 110, .1);
}

.landing-hero {
  display: grid;
  grid-template-columns: 1.4fr .9fr;
  align-items: center;
  gap: 34px;
  background: radial-gradient(circle at top right, rgba(98, 223, 200, .12), transparent 28%), linear-gradient(135deg, #ffffff 0%, #f5faf9 100%);
  border: 1px solid #e4eef0;
  border-radius: 28px;
  padding: 38px 36px;
  box-shadow: 0 28px 60px rgba(15, 40, 52, .06);
}

.hero-copy p {
  max-width: 560px;
  font-size: 1.06rem;
  color: #4e6879;
  margin-bottom: 28px;
}

.cta-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-panel { display: grid; }

.panel-card {
  background: linear-gradient(180deg, #153d42 0%, #0d2c32 100%);
  color: #f4fbfb;
  border-radius: 22px;
  padding: 26px 24px;
  box-shadow: 0 22px 45px rgba(11, 41, 48, .2);
}

.panel-card h2 { margin-top: 18px; }
.panel-card ul {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
  color: #d8efee;
}

.panel-card li::before {
  content: "✓";
  display: inline-block;
  margin-left: 10px;
  color: #7fe4d6;
  font-weight: 700;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin-top: 28px;
}

.feature-grid article {
  background: white;
  border: 1px solid #e1eaef;
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 14px 28px rgba(17, 32, 42, .04);
}

.feature-grid p {
  margin: 0;
  color: #5d7280;
}

.auth-card {
  max-width: 520px;
  margin: 24px auto 0;
  background: rgba(255,255,255,.92);
  border: 1px solid #e2ebf2;
  border-radius: 26px;
  padding: 32px 28px 26px;
  box-shadow: 0 22px 44px rgba(15, 31, 41, .06);
}

.auth-card h1 {
  font-size: clamp(1.9rem, 2.4vw, 2.6rem);
  margin-top: 12px;
}

.auth-card form {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.auth-card label {
  font-size: 14px;
  color: #355263;
  font-weight: 700;
  margin-bottom: 4px;
}

.auth-card input {
  width: 100%;
  border: 1px solid #dfe7ee;
  background: #f9fbfc;
  border-radius: 12px;
  padding: 13px 14px;
  color: #18313d;
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}

.auth-card input:focus {
  outline: none;
  border-color: #7ccfc0;
  background: white;
  box-shadow: 0 0 0 4px rgba(20, 135, 122, .08);
}

.auth-card small {
  display: block;
  margin-top: -4px;
  color: #5f7687;
  font-size: 12px;
}

.auth-card .errors {
  border-radius: 12px;
  background: #fff2f2;
  color: #9a2b2b;
  border: 1px solid #f6d7d7;
  padding: 12px 14px;
}

.auth-card .errors ul {
  margin: 0;
  padding-right: 18px;
}

.auth-card p {
  margin-top: 18px;
  text-align: center;
  color: #546d7d;
}

.auth-card a {
  font-weight: 700;
}

.form-card {
  max-width: 760px;
  margin: 12px auto 0;
  background: rgba(255,255,255,.94);
  border: 1px solid #e4edf3;
  border-radius: 26px;
  padding: 30px 28px 26px;
  box-shadow: 0 20px 42px rgba(16, 29, 37, .05);
}

.form-card a {
  font-weight: 700;
}

.form-card h1 {
  font-size: clamp(1.9rem, 2.8vw, 2.7rem);
  margin-top: 12px;
}

.form-card form {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.form-card label {
  font-size: 14px;
  color: #355263;
  font-weight: 700;
  margin-bottom: 4px;
}

.form-card input,
.form-card textarea {
  width: 100%;
  border: 1px solid #dfe7ee;
  background: #f9fbfc;
  border-radius: 12px;
  padding: 13px 14px;
  color: #18313d;
  resize: vertical;
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}

.form-card textarea {
  min-height: 140px;
}

.form-card input:focus,
.form-card textarea:focus {
  outline: none;
  border-color: #7ccfc0;
  background: white;
  box-shadow: 0 0 0 4px rgba(20, 135, 122, .08);
}

.form-card .errors {
  border-radius: 12px;
  background: #fff2f2;
  color: #9a2b2b;
  border: 1px solid #f6d7d7;
  padding: 12px 14px;
}

.form-card .errors ul {
  margin: 0;
  padding-right: 18px;
}

.form-card small {
  display: block;
  color: #61798a;
  font-size: 12px;
  margin-top: -2px;
}

.chat-shell {
  max-width: 980px;
  margin: 8px auto 0;
  background: rgba(255,255,255,.94);
  border: 1px solid #e3edf3;
  border-radius: 28px;
  padding: 24px 22px 18px;
  box-shadow: 0 18px 42px rgba(12, 26, 35, .05);
}

.chat-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid #e8edf2;
}

.chat-heading a {
  color: #19817a;
  font-weight: 700;
}

.chat-heading h1 {
  margin: 6px 0 0;
  font-size: clamp(1.8rem, 2.3vw, 2.5rem);
}

.chat-shell .badge {
  display: inline-block;
  background: rgba(18, 122, 110, .08);
  color: #115f5e;
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 11px;
  font-weight: 700;
}

.messages {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 18px 0 8px;
}

.message {
  display: grid;
  gap: 8px;
  padding: 16px 16px 14px;
  border-radius: 18px;
  border: 1px solid #e6edf2;
  background: #f8fbfc;
}

.message.user {
  background: #eefaf8;
  border-color: #d5efe9;
}

.message.assistant {
  background: white;
}

.message-label {
  font-size: 12px;
  color: #5d7280;
  font-weight: 700;
}

.message-text {
  white-space: pre-wrap;
  word-wrap: break-word;
  color: #1b2f39;
  font-size: 15px;
  line-height: 1.9;
}

.chat-welcome {
  background: linear-gradient(135deg, #f1fdf8 0%, #edf7f5 100%);
  border: 1px solid #dff1ed;
  border-radius: 20px;
  padding: 24px 20px;
  text-align: center;
}

.chat-welcome .orb {
  margin-bottom: 12px;
}

.composer {
  display: flex;
  align-items: flex-end;
  gap: 14px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid #e8edf2;
}

.composer textarea {
  flex: 1;
  min-height: 52px;
  max-height: 180px;
  resize: vertical;
  border: 1px solid #dfe7ee;
  border-radius: 14px;
  padding: 12px 14px;
  background: #f9fbfc;
  color: #18313d;
}

.composer textarea:focus {
  outline: none;
  border-color: #7ccfc0;
  box-shadow: 0 0 0 4px rgba(20, 135, 122, .08);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.interrupted {
  color: #8a5b18;
  font-weight: 600;
}

footer {
  text-align: center;
  color: #728392;
  padding: 24px 20px 40px;
}

@media (max-width: 860px) {
  .landing-hero,
  .feature-grid,
  .stats,
  .cards {
    grid-template-columns: 1fr;
  }

  .topbar {
    height: auto;
    padding-top: 16px;
    padding-bottom: 16px;
    flex-wrap: wrap;
  }

  nav {
    width: 100%;
    justify-content: flex-end;
    flex-wrap: wrap;
  }

  .page-heading {
    display: block;
  }
}