:root {
  --c-text: #1a1a1a;
  --c-muted: #555;
  --c-bg: #fff;
  --c-bg-alt: #f6f7fb;
  --c-accent: #4a154b; /* Slack purple */
  --c-accent-hover: #611f64;
  --c-border: #e3e5ec;
  --maxw: 960px;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 2px 8px rgba(0, 0, 0, 0.04);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Hiragino Kaku Gothic ProN",
    "Yu Gothic", "Meiryo", sans-serif;
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  font-size: 16px;
}

a {
  color: var(--c-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3 {
  line-height: 1.4;
  margin: 2em 0 0.6em;
}

h1 {
  font-size: 2.4rem;
  margin-top: 0;
}

h2 {
  font-size: 1.6rem;
  border-bottom: 2px solid var(--c-border);
  padding-bottom: 0.3em;
}

h3 {
  font-size: 1.2rem;
}

code {
  background: var(--c-bg-alt);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.95em;
  font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

pre {
  background: var(--c-bg-alt);
  padding: 16px;
  border-radius: var(--radius);
  overflow-x: auto;
  border: 1px solid var(--c-border);
}

/* ------- Header / Footer ------- */
.site-header,
.site-footer {
  border-bottom: 1px solid var(--c-border);
  padding: 16px 24px;
  background: var(--c-bg);
}

.site-footer {
  border-top: 1px solid var(--c-border);
  border-bottom: none;
  margin-top: 64px;
  color: var(--c-muted);
  font-size: 0.9rem;
}

.site-header .nav,
.site-footer .nav {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  gap: 24px;
  align-items: center;
}

.site-header .brand {
  font-weight: 700;
  color: var(--c-text);
  margin-right: auto;
  font-size: 1.1rem;
}

.site-header .brand a {
  color: var(--c-text);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.site-header .brand a:hover {
  text-decoration: none;
}

.site-header .brand img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
}

/* ------- Main containers ------- */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

main {
  padding: 32px 0 48px;
}

.hero {
  text-align: center;
  padding: 80px 24px 56px;
  background: linear-gradient(180deg, var(--c-bg) 0%, var(--c-bg-alt) 100%);
}

.hero h1 {
  font-size: 2.6rem;
  margin-bottom: 12px;
}

.hero .tagline {
  font-size: 1.2rem;
  color: var(--c-muted);
  margin: 0 auto 32px;
  max-width: 640px;
}

.cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--c-accent);
  color: #fff;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 1rem;
  box-shadow: var(--shadow);
  border: none;
  cursor: pointer;
  transition: background 0.15s;
}

.cta:hover {
  background: var(--c-accent-hover);
  text-decoration: none;
  color: #fff;
}

.cta-sub {
  display: block;
  margin-top: 12px;
  color: var(--c-muted);
  font-size: 0.85rem;
}

/* ------- Feature grid ------- */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin: 48px 0;
}

.feature-card {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.feature-card h3 {
  margin-top: 0;
  font-size: 1.05rem;
}

.feature-card p {
  color: var(--c-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* ------- Pricing ------- */
.pricing {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin: 32px 0 48px;
}

.plan {
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 32px;
  background: var(--c-bg);
}

.plan.featured {
  border-color: var(--c-accent);
  box-shadow: var(--shadow);
}

.plan h3 {
  margin-top: 0;
  font-size: 1.2rem;
}

.plan .price {
  font-size: 2.2rem;
  font-weight: 700;
  margin: 16px 0;
}

.plan .price small {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--c-muted);
}

.plan ul {
  padding-left: 1.2em;
  margin: 16px 0;
  color: var(--c-muted);
}

.plan ul li {
  margin: 6px 0;
}

.plan .price-note {
  font-size: 0.85rem;
  color: var(--c-muted);
  margin: -8px 0 12px;
}

.pricing-tiers {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 20px;
  font-size: 0.95rem;
}

.pricing-tiers th,
.pricing-tiers td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--c-border);
  text-align: left;
}

.pricing-tiers th {
  font-weight: 600;
  color: var(--c-muted);
  background: rgba(0, 0, 0, 0.02);
}

.pricing-tiers tr:last-child td {
  border-bottom: none;
}

/* ------- Legal pages ------- */
.legal {
  padding: 0;
}

.legal ol,
.legal ul {
  padding-left: 1.6em;
}

.legal h2 {
  margin-top: 1.6em;
}

.legal-meta {
  color: var(--c-muted);
  font-size: 0.9rem;
  margin: -16px 0 24px;
}

.notice {
  background: #fff7e6;
  border: 1px solid #ffd591;
  border-radius: var(--radius);
  padding: 16px 20px;
  margin: 16px 0;
  font-size: 0.95rem;
}

table.kv {
  border-collapse: collapse;
  width: 100%;
  margin: 16px 0;
}

table.kv th,
table.kv td {
  text-align: left;
  vertical-align: top;
  padding: 10px 12px;
  border-bottom: 1px solid var(--c-border);
}

table.kv th {
  width: 30%;
  background: var(--c-bg-alt);
  color: var(--c-muted);
  font-weight: 500;
}

/* ------- Responsive ------- */
@media (max-width: 640px) {
  .hero {
    padding: 56px 16px 40px;
  }
  .hero h1 {
    font-size: 1.8rem;
  }
  .container {
    padding: 0 16px;
  }
  h1 {
    font-size: 1.8rem;
  }
  h2 {
    font-size: 1.3rem;
  }
}