:root {
  --c-primary: #0052CC;
  --c-primary-dark: #003D99;
  --c-primary-light: #E6F0FF;
  --c-accent: #00B8D9;
  --c-accent-dark: #008DA6;
  --c-success: #36B37E;
  --c-warning: #FFAB00;
  --c-danger: #FF5630;
  --c-text: #172B4D;
  --c-text-muted: #5E6C84;
  --c-text-light: #97A0AF;
  --c-bg: #FFFFFF;
  --c-bg-alt: #F4F5F7;
  --c-bg-dark: #091E42;
  --c-border: #DFE1E6;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", Menlo, Courier, monospace;
  --shadow-sm: 0 1px 2px rgba(9,30,66,.08);
  --shadow-md: 0 4px 12px rgba(9,30,66,.08);
  --shadow-lg: 0 8px 24px rgba(9,30,66,.12);
  --radius: 8px;
  --max-w: 1200px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  color: var(--c-text);
  line-height: 1.6;
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--c-primary-dark); }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* === NAV === */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.95); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  padding: 0 24px; height: 64px;
  display: flex; align-items: center; justify-content: space-between;
}
.nav-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.25em; color: var(--c-primary); }
.nav-brand svg { width: 32px; height: 32px; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--c-text-muted); font-size: .95em; font-weight: 500; }
.nav-links a:hover { color: var(--c-primary); }
.nav-cta {
  background: var(--c-primary); color: #fff !important; padding: 8px 20px;
  border-radius: 6px; font-weight: 600; font-size: .9em;
  transition: background .2s;
}
.nav-cta:hover { background: var(--c-primary-dark); }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--c-text); margin: 5px 0; transition: .3s; }

/* === HERO === */
.hero {
  background: linear-gradient(135deg, var(--c-bg-dark) 0%, var(--c-primary-dark) 100%);
  color: #fff; padding: 100px 24px 80px; text-align: center;
}
.hero h1 { font-size: clamp(2em, 5vw, 3.2em); font-weight: 800; margin-bottom: 20px; line-height: 1.15; }
.hero p { font-size: 1.2em; opacity: .85; max-width: 640px; margin: 0 auto 36px; }
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 8px; font-weight: 600; font-size: 1em;
  transition: all .2s; border: 2px solid transparent; cursor: pointer;
}
.btn-primary { background: var(--c-accent); color: #fff; }
.btn-primary:hover { background: var(--c-accent-dark); color: #fff; }
.btn-outline { border-color: rgba(255,255,255,.3); color: #fff; background: transparent; }
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,.1); color: #fff; }
.btn-dark { background: var(--c-primary); color: #fff; }
.btn-dark:hover { background: var(--c-primary-dark); color: #fff; }

.hero-stats { display: flex; justify-content: center; gap: 48px; margin-top: 60px; flex-wrap: wrap; }
.hero-stat { text-align: center; }
.hero-stat .num { font-size: 2.4em; font-weight: 800; display: block; }
.hero-stat .label { font-size: .9em; opacity: .65; }

/* === SECTIONS === */
.section { padding: 80px 24px; }
.section-alt { background: var(--c-bg-alt); }
.section-dark { background: var(--c-bg-dark); color: #fff; }
.section-title { font-size: 2em; font-weight: 700; text-align: center; margin-bottom: 16px; }
.section-subtitle { text-align: center; color: var(--c-text-muted); max-width: 600px; margin: 0 auto 48px; font-size: 1.1em; }

/* === GRID === */
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 32px; max-width: var(--max-w); margin: 0 auto; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 32px; max-width: var(--max-w); margin: 0 auto; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; max-width: var(--max-w); margin: 0 auto; }

/* === CARDS === */
.card {
  background: var(--c-bg); border: 1px solid var(--c-border);
  border-radius: var(--radius); padding: 32px;
  box-shadow: var(--shadow-sm); transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.card-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px; font-size: 1.5em;
}
.card-icon-blue { background: var(--c-primary-light); color: var(--c-primary); }
.card-icon-teal { background: #E6FCFF; color: var(--c-accent); }
.card-icon-green { background: #E3FCEF; color: var(--c-success); }
.card-icon-orange { background: #FFF7E6; color: var(--c-warning); }
.card h3 { font-size: 1.15em; margin-bottom: 8px; }
.card p { color: var(--c-text-muted); font-size: .95em; line-height: 1.6; }

/* === PRICING === */
.pricing-card { text-align: center; position: relative; }
.pricing-card.featured { border-color: var(--c-primary); border-width: 2px; }
.pricing-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--c-primary); color: #fff; padding: 4px 16px;
  border-radius: 12px; font-size: .8em; font-weight: 600;
}
.pricing-price { font-size: 2.8em; font-weight: 800; color: var(--c-primary); margin: 16px 0 8px; }
.pricing-price span { font-size: .4em; color: var(--c-text-muted); font-weight: 400; }
.pricing-features { list-style: none; padding: 24px 0; text-align: left; }
.pricing-features li { padding: 8px 0; font-size: .95em; color: var(--c-text-muted); display: flex; align-items: center; gap: 8px; }
.pricing-features li::before { content: "✓"; color: var(--c-success); font-weight: 700; }

/* === CODE BLOCKS (API docs) === */
.code-block {
  background: #1a1a2e; color: #e6e6e6; padding: 20px 24px;
  border-radius: var(--radius); font-family: var(--font-mono);
  font-size: .88em; line-height: 1.7; overflow-x: auto;
  margin: 16px 0;
}
.code-block .kw { color: #c792ea; }
.code-block .str { color: #c3e88d; }
.code-block .num { color: #f78c6c; }
.code-block .comment { color: #676e95; }

/* === API DOCS === */
.endpoint {
  border: 1px solid var(--c-border); border-radius: var(--radius);
  margin-bottom: 24px; overflow: hidden;
}
.endpoint-header {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 20px; background: var(--c-bg-alt); border-bottom: 1px solid var(--c-border);
}
.method { padding: 4px 10px; border-radius: 4px; font-family: var(--font-mono); font-weight: 700; font-size: .85em; color: #fff; }
.method-post { background: var(--c-success); }
.method-get { background: var(--c-primary); }
.method-delete { background: var(--c-danger); }
.endpoint-path { font-family: var(--font-mono); font-size: .95em; }
.endpoint-body { padding: 20px; }
.param-table { width: 100%; border-collapse: collapse; margin: 12px 0; }
.param-table th { text-align: left; padding: 8px 12px; background: var(--c-bg-alt); font-size: .85em; color: var(--c-text-muted); text-transform: uppercase; letter-spacing: .5px; }
.param-table td { padding: 10px 12px; border-top: 1px solid var(--c-border); font-size: .92em; }
.param-table code { background: var(--c-bg-alt); padding: 2px 6px; border-radius: 3px; font-family: var(--font-mono); font-size: .9em; }
.required { color: var(--c-danger); font-size: .8em; font-weight: 600; }

/* === BLOG === */
.blog-card { padding: 0; overflow: hidden; }
.blog-card-img { height: 180px; background: linear-gradient(135deg, var(--c-primary-light), #E6FCFF); display: flex; align-items: center; justify-content: center; font-size: 3em; }
.blog-card-body { padding: 24px; }
.blog-meta { font-size: .85em; color: var(--c-text-light); margin-bottom: 8px; }
.blog-card h3 { font-size: 1.1em; margin-bottom: 8px; }

/* === FOOTER === */
.footer { background: var(--c-bg-dark); color: rgba(255,255,255,.7); padding: 60px 24px 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; max-width: var(--max-w); margin: 0 auto; }
.footer h4 { color: #fff; margin-bottom: 16px; font-size: .95em; text-transform: uppercase; letter-spacing: .5px; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 8px; }
.footer a { color: rgba(255,255,255,.6); font-size: .9em; }
.footer a:hover { color: #fff; }
.footer-brand { font-size: .95em; line-height: 1.7; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 40px; padding-top: 20px; text-align: center; font-size: .85em; max-width: var(--max-w); margin-left: auto; margin-right: auto; }

/* === TRUST === */
.trust-bar { display: flex; justify-content: center; gap: 48px; flex-wrap: wrap; padding: 24px 0; opacity: .5; }
.trust-item { font-size: 1.1em; font-weight: 600; color: var(--c-text-muted); white-space: nowrap; }

/* === PAGE HEADERS === */
.page-header { background: var(--c-bg-dark); color: #fff; padding: 60px 24px; text-align: center; }
.page-header h1 { font-size: 2.2em; margin-bottom: 12px; }
.page-header p { opacity: .75; max-width: 560px; margin: 0 auto; }

/* === FORM === */
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; font-size: .92em; }
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 16px; border: 1px solid var(--c-border);
  border-radius: 6px; font-family: var(--font-sans); font-size: .95em;
  transition: border-color .2s;
}
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--c-primary); box-shadow: 0 0 0 3px var(--c-primary-light); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* === PROSE === */
.prose { max-width: 720px; margin: 0 auto; }
.prose h2 { font-size: 1.6em; margin: 40px 0 16px; }
.prose h3 { font-size: 1.25em; margin: 32px 0 12px; }
.prose p { margin-bottom: 16px; color: var(--c-text-muted); }
.prose ul, .prose ol { margin: 16px 0; padding-left: 24px; color: var(--c-text-muted); }
.prose li { margin-bottom: 8px; }

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: #fff; padding: 20px; border-bottom: 1px solid var(--c-border); box-shadow: var(--shadow-md); }
  .hero { padding: 60px 16px 50px; }
  .hero-stats { gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
}