/* Inventr marketing site — blog + funnel tools */
:root {
  --color-bg: #0f0f12;
  --color-surface: #1a1a22;
  --color-border: #2e2e3a;
  --color-text: #e8e8ef;
  --color-muted: #9b9bab;
  --color-primary: #667eea;
  --color-primary-dark: #5a6fd6;
  --color-accent: #764ba2;
  --color-success: #34d399;
  --color-warning-bg: #422006;
  --color-warning-border: #f59e0b;
  --color-tip-bg: #0c2e1f;
  --color-tip-border: #34d399;
  --font: "Inter", system-ui, -apple-system, sans-serif;
  --radius: 10px;
  --container: min(1100px, 92vw);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
}

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

a:hover {
  text-decoration: underline;
}

.container {
  width: var(--container);
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 15, 18, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
}

.logo {
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--color-text);
  text-decoration: none;
}

.logo span {
  font-weight: 500;
  color: var(--color-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.nav-links a:not(.btn) {
  color: var(--color-muted);
  font-size: 0.95rem;
  font-weight: 500;
}

.nav-links a:not(.btn):hover {
  color: var(--color-text);
  text-decoration: none;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.55rem 1.1rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, opacity 0.15s;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
}

.btn--sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.875rem;
}

.btn--lg {
  padding: 0.85rem 1.5rem;
  font-size: 1.05rem;
}

.btn--white {
  background: #fff;
  color: #1a1a22;
}

.btn--outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn.secondary,
button.secondary {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

/* Hero */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 4rem 0 3.5rem;
  text-align: center;
}

.hero--small {
  padding: 2.5rem 0 2rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.2;
  font-weight: 800;
  color: #fff;
}

.hero p {
  margin: 0.75rem auto 0;
  max-width: 42rem;
  color: rgba(255, 255, 255, 0.9);
}

/* Article */
main {
  padding: 2.5rem 0 3rem;
}

.article {
  max-width: 720px;
  margin-inline: auto;
}

.article h2 {
  margin: 2.25rem 0 0.75rem;
  font-size: 1.45rem;
  font-weight: 700;
  color: #fff;
}

.article h3 {
  margin: 1.5rem 0 0.5rem;
  font-size: 1.15rem;
  font-weight: 600;
}

.article p {
  margin: 0 0 1rem;
}

.article ul,
.article ol {
  margin: 0 0 1.25rem;
  padding-left: 1.35rem;
}

.article li {
  margin-bottom: 0.4rem;
}

.article blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.25rem;
  border-left: 4px solid var(--color-primary);
  background: var(--color-surface);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--color-muted);
}

.article table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.25rem 0 1.5rem;
  font-size: 0.9rem;
}

.article th,
.article td {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

.article th {
  background: var(--color-surface);
  font-weight: 600;
}

.article tr:nth-child(even) td {
  background: rgba(26, 26, 34, 0.5);
}

.tip,
.warning {
  margin: 1.5rem 0;
  padding: 1rem 1.15rem;
  border-radius: var(--radius);
  border-left: 4px solid;
}

.tip {
  background: var(--color-tip-bg);
  border-color: var(--color-tip-border);
}

.warning {
  background: var(--color-warning-bg);
  border-color: var(--color-warning-border);
}

/* CTA banner */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  padding: 3rem 0;
  text-align: center;
}

.cta-banner h2 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  color: #fff;
}

.cta-banner p {
  margin: 0 auto 1.25rem;
  max-width: 36rem;
  color: rgba(255, 255, 255, 0.92);
}

/* Footer */
.site-footer {
  padding: 2rem 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.site-footer p {
  margin: 0;
}

/* Blog index */
.category-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin: 1.5rem 0 2rem;
}

.category-nav a,
.category-chip {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-muted);
  text-decoration: none;
}

.category-nav a:hover,
.category-nav a.is-active {
  border-color: var(--color-primary);
  color: var(--color-text);
  text-decoration: none;
}

.post-grid {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 3rem;
}

@media (min-width: 640px) {
  .post-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.post-card {
  display: block;
  padding: 1.25rem 1.35rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s;
}

.post-card:hover {
  border-color: var(--color-primary);
  text-decoration: none;
}

.post-card .cluster {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  margin-bottom: 0.35rem;
}

.post-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  color: #fff;
  line-height: 1.35;
}

.post-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-muted);
  line-height: 1.5;
}

.cluster-section {
  margin-bottom: 2.5rem;
}

.cluster-section h2 {
  font-size: 1.35rem;
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.tools-grid {
  display: grid;
  gap: 1rem;
  margin: 2rem 0 3rem;
}

@media (min-width: 640px) {
  .tools-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.tool-card {
  padding: 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.tool-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.tool-card p {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.placeholder-note {
  max-width: 40rem;
  margin: 2rem auto;
  padding: 1.25rem;
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  text-align: center;
  color: var(--color-muted);
}