/* ── Reset & Base ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #0088cc;
  --primary-dark: #006699;
  --primary-light: #e6f4fb;
  --text: #1a1a2e;
  --text-light: #555;
  --bg: #ffffff;
  --bg-alt: #f8f9fc;
  --border: #e2e8f0;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --radius: 12px;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
}

/* ── Layout ── */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 80px 0;
}

/* ── Navbar ── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  padding: 16px 0;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.navbar-logo {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
}

.navbar-cta {
  background: var(--primary);
  color: #fff;
  padding: 8px 20px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: background 0.2s;
}

.navbar-cta:hover {
  background: var(--primary-dark);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 10px;
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary-light);
}

/* ── Hero ── */
.hero {
  padding: 160px 0 100px;
  text-align: center;
  background: linear-gradient(180deg, var(--primary-light) 0%, var(--bg) 100%);
}

.hero-logo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 24px;
  box-shadow: var(--shadow-lg);
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--text);
}

.hero h1 span {
  color: var(--primary);
}

.hero .tagline {
  font-size: 1.25rem;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero .cta-group {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.hero .sub-text {
  font-size: 0.9rem;
  color: var(--text-light);
}

/* ── Problem ── */
.problem {
  background: var(--bg-alt);
}

.problem .section-title {
  text-align: center;
  margin-bottom: 48px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.problem-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
}

.problem-card .icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.problem-card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.problem-card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* ── Section titles ── */
.section-title h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-title p {
  color: var(--text-light);
  font-size: 1.1rem;
}

/* ── Steps ── */
.steps .section-title {
  text-align: center;
  margin-bottom: 56px;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
}

.step {
  text-align: center;
}

.step-number {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.step h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.step p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* ── Features ── */
.features {
  background: var(--bg-alt);
}

.features .section-title {
  text-align: center;
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.feature-card .icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.feature-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

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

/* ── Bot Preview ── */
.bot-preview .section-title {
  text-align: center;
  margin-bottom: 48px;
}

.chat-window {
  max-width: 480px;
  margin: 0 auto;
  background: #e5ddd5;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.chat-header {
  background: #075e54;
  color: #fff;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.chat-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.chat-header-info h4 {
  font-size: 1rem;
  font-weight: 600;
}

.chat-header-info span {
  font-size: 0.8rem;
  opacity: 0.8;
}

.chat-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.msg {
  max-width: 85%;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 0.9rem;
  line-height: 1.5;
}

.msg-user {
  align-self: flex-end;
  background: #dcf8c6;
  border-bottom-right-radius: 2px;
}

.msg-bot {
  align-self: flex-start;
  background: #fff;
  border-bottom-left-radius: 2px;
}

.msg-bot code {
  background: #f0f0f0;
  padding: 1px 4px;
  border-radius: 3px;
  font-size: 0.85rem;
}

/* ── Channels ── */
.channels .section-title {
  text-align: center;
  margin-bottom: 48px;
}

.channels-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 700px;
  margin: 0 auto;
}

.channel-card {
  text-align: center;
  padding: 32px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
}

.channel-card .icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.channel-card h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.channel-card .badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-top: 8px;
}

.badge-active {
  background: #d1fae5;
  color: #065f46;
}

.badge-soon {
  background: #fef3c7;
  color: #92400e;
}

/* ── CTA Final ── */
.cta-final {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  text-align: center;
}

.cta-final h2 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-final p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 32px;
}

.cta-final .btn-primary {
  background: #fff;
  color: var(--primary);
}

.cta-final .btn-primary:hover {
  background: #f0f0f0;
  transform: translateY(-1px);
}

/* ── Footer ── */
.footer {
  background: var(--text);
  color: #fff;
  padding: 32px 0;
  text-align: center;
}

.footer p {
  font-size: 0.9rem;
  opacity: 0.7;
}

.footer a {
  color: var(--primary);
  opacity: 1;
}

.footer a:hover {
  text-decoration: underline;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  section {
    padding: 60px 0;
  }

  .hero {
    padding: 120px 0 70px;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero .tagline {
    font-size: 1.05rem;
  }

  .problem-grid,
  .steps-grid,
  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .channels-grid {
    grid-template-columns: 1fr;
    max-width: 300px;
  }

  .section-title h2 {
    font-size: 1.6rem;
  }

  .cta-final h2 {
    font-size: 1.7rem;
  }

  .btn {
    padding: 12px 24px;
    font-size: 1rem;
    width: 100%;
    justify-content: center;
  }

  .hero .cta-group {
    flex-direction: column;
    align-items: center;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .problem-grid,
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
}