/* ─── Keyframes ───────────────────────────────────────────── */
@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0);    }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to   { opacity: 1; transform: scale(1);   }
}

/* ─── Tokens ──────────────────────────────────────────────── */
:root {
  --bg:           #F7F9F9;
  --surface:      #FFFFFF;
  --surface-alt:  #EFF3F4;
  --border:       #EFF3F4;
  --text:         #0F1419;
  --muted:        #536471;
  --accent:       #1D9BF0;
  --accent-soft:  #E8F5FD;
  --accent-deep:  #1a8cd8;
  --warn:         #FFB400;
  --danger:       #F4212E;

  --ease:         cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-spring:  cubic-bezier(0.34, 1.18, 0.64, 1);
  --ease-expo:    cubic-bezier(0.16, 1, 0.3, 1);

  --navbar-h:     68px;
  --max-w:        1100px;
  --radius:       22px;
}

/* ─── Reset ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Manrope", sans-serif;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { margin: 0; }
p { margin: 0; }
a { color: inherit; }

/* ─── Navbar ──────────────────────────────────────────────── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--navbar-h);
  background: rgba(247,249,249,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.navbar-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  height: 100%;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.navbar-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--text);
  flex-shrink: 0;
}
.logo-mark.small { width: 28px; height: 28px; border-radius: 8px; }
.logo-mark svg { width: 18px; height: 18px; }
.logo-mark.small svg { width: 14px; height: 14px; }
.logo-name {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.navbar-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
.navbar-nav a {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s var(--ease);
}
.navbar-nav a:hover { color: var(--text); }
.navbar-nav .nav-cta {
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  background: var(--text);
  color: white;
  font-weight: 700;
  transition: transform 0.13s var(--ease), box-shadow 0.13s var(--ease);
}
.navbar-nav .nav-cta:hover {
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(24,20,18,0.22);
}

/* ─── Shared ──────────────────────────────────────────────── */
.eyebrow {
  margin: 0 0 14px;
  font: 700 11px/1 "IBM Plex Mono", monospace;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: 999px;
  background: var(--text);
  color: white;
  font: 800 0.95rem/1.2 "Manrope", sans-serif;
  text-decoration: none;
  transition: transform 0.13s var(--ease), box-shadow 0.13s var(--ease), background 0.13s var(--ease);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(15,20,25,0.3);
  background: #2c3640;
}
.btn-primary.large {
  padding: 1rem 2.25rem;
  font-size: 1.05rem;
}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  font: 700 0.9rem/1.2 "Manrope", sans-serif;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.13s var(--ease);
}
.btn-ghost:hover { color: var(--text); }

/* ─── Hero ────────────────────────────────────────────────── */
.hero {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 5rem 2rem 4rem;
  display: grid;
  grid-template-columns: 1fr 440px;
  gap: 4rem;
  align-items: center;
}
.hero-inner { animation: fadeSlideUp 0.55s var(--ease-expo) both; }
.hero h1 {
  font-size: clamp(2.6rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 1.1rem;
}
.subtitle {
  font-size: 1.05rem;
  color: var(--muted);
  line-height: 1.65;
  max-width: 480px;
  margin-bottom: 2rem;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}
.hero-fine {
  margin-top: 1rem;
  font-size: 0.78rem;
  color: var(--muted);
  opacity: 0.7;
}

/* Hero preview card */
.hero-preview {
  animation: scaleIn 0.6s 0.15s var(--ease-spring) both;
}
.preview-card {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(24,20,18,0.12), 0 4px 14px rgba(24,20,18,0.06);
}
.preview-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border);
}
.preview-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.preview-dot.red    { background: #ff5f57; }
.preview-dot.yellow { background: #ffbd2e; }
.preview-dot.green  { background: #28c840; }
.preview-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  margin-left: 6px;
  font-family: "IBM Plex Mono", monospace;
}
.preview-body { padding: 20px; }
.preview-label {
  font: 700 10px/1 "IBM Plex Mono", monospace;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-bottom: 10px;
}
.preview-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}
.preview-tag {
  padding: 4px 10px;
  border-radius: 999px;
  font: 700 11px/1.2 "IBM Plex Mono", monospace;
  letter-spacing: 0.04em;
}
.preview-tag.danger {
  background: rgba(220,38,38,0.1);
  color: var(--danger);
  border: 1px solid rgba(220,38,38,0.2);
}
.preview-tag.warn {
  background: rgba(217,119,6,0.1);
  color: var(--warn);
  border: 1px solid rgba(217,119,6,0.2);
}
.preview-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 14px;
}
.preview-posts { display: grid; gap: 8px; }
.preview-post {
  padding: 10px 14px;
  background: var(--surface-alt);
  border-radius: 10px;
  font-size: 12px;
  color: var(--text);
  line-height: 1.5;
  border: 1px solid var(--border);
  font-style: italic;
}

/* ─── Problem ─────────────────────────────────────────────── */
.problem {
  background: var(--text);
  color: white;
  padding: 6rem 2rem;
}
.problem-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.problem .eyebrow { color: var(--accent-soft); }
.problem h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  max-width: 700px;
  margin-bottom: 1.25rem;
}
.problem-copy {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  max-width: 640px;
  margin-bottom: 3.5rem;
}
.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.stat-item {
  padding: 1.75rem;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 18px;
  background: rgba(255,255,255,0.04);
}
.stat-num {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--accent);
  margin-bottom: 0.5rem;
}
.stat-label {
  display: block;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.5;
}

/* ─── Signals ─────────────────────────────────────────────── */
.signals {
  padding: 6rem 2rem;
  background: var(--bg);
}
.signals-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.signals h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}
.signals-sub {
  font-size: 1rem;
  color: var(--muted);
  max-width: 540px;
  line-height: 1.6;
  margin-bottom: 3rem;
}
.signals-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.signal-card {
  padding: 20px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 18px;
  transition: transform 0.16s var(--ease), box-shadow 0.16s var(--ease), border-color 0.16s var(--ease);
}
.signal-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(15,20,25,0.08);
  border-color: rgba(15,20,25,0.2);
}
.signal-icon {
  display: block;
  font-size: 1.5rem;
  margin-bottom: 10px;
}
.signal-card strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}
.signal-card p {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.55;
}

/* ─── How It Works ────────────────────────────────────────── */
.how-it-works {
  padding: 6rem 2rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.how-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.how-it-works h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 3rem;
}
.steps {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  gap: 1.5rem;
  align-items: start;
}
.step {
  padding: 2rem;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
}
.step-arrow {
  font-size: 1.5rem;
  color: var(--muted);
  opacity: 0.4;
  padding-top: 2.5rem;
  align-self: start;
}
.step-num {
  font: 700 11px/1 "IBM Plex Mono", monospace;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 1rem;
}
.step h4 {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-bottom: 0.6rem;
}
.step p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.6;
}

/* ─── Install CTA ─────────────────────────────────────────── */
.install {
  padding: 7rem 2rem;
  background: var(--bg);
}
.install-inner {
  max-width: 620px;
  margin: 0 auto;
  text-align: center;
}
.install-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 18px;
  background: var(--text);
  box-shadow: 0 8px 28px rgba(15,20,25,0.2);
  margin-bottom: 1.75rem;
}
.install-logo svg { width: 30px; height: 30px; }
.install h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1rem;
}
.install p {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 2rem;
}
.install-fine {
  margin-top: 1rem !important;
  font-size: 0.78rem;
  color: var(--muted);
  opacity: 0.6;
}

/* ─── Footer ──────────────────────────────────────────────── */
.footer {
  padding: 2rem;
  border-top: 1px solid var(--border);
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 0.9rem;
}
.footer-copy {
  font-size: 0.8rem;
  color: var(--muted);
}

/* ─── Hidden ──────────────────────────────────────────────── */
.hidden { display: none !important; }

/* ─── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
  .signals-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 3.5rem 1.5rem 3rem;
    gap: 3rem;
  }
  .hero-preview { order: -1; }
  .stat-row { grid-template-columns: 1fr; gap: 1rem; }
  .steps {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .step-arrow { display: none; }
  .navbar-nav a:not(.nav-cta) { display: none; }
}

@media (max-width: 600px) {
  .navbar-inner { padding: 0 1.25rem; }
  .signals-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; text-align: center; }
  .signals, .problem, .how-it-works, .install { padding: 4rem 1.25rem; }
}