/* EthereumWebsites.com — Design System
   Brand: dark, technical, trustworthy dev-shop for Web3 projects. */

:root {
  /* Brand colors */
  --color-primary: #5B5FEF;        /* indigo-violet — primary actions, links */
  --color-primary-dark: #4548C4;
  --color-primary-light: #8285F5;
  --color-accent: #14F1B2;         /* teal-green — CTAs, highlights */
  --color-accent-dark: #0FC993;

  --color-bg: #0B0E17;             /* near-black navy background */
  --color-bg-alt: #10131F;
  --color-surface: #131826;        /* card surface */
  --color-surface-alt: #1A2033;
  --color-border: #262D42;

  --color-text: #F5F7FF;
  --color-text-muted: #A0A8C0;
  --color-text-faint: #6B7390;

  --color-success: #14F1B2;
  --color-warning: #F5B942;
  --color-danger: #F5566B;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.375rem;
  --fs-xl: 1.75rem;
  --fs-2xl: 2.25rem;
  --fs-3xl: 3rem;
  --fs-4xl: 3.75rem;

  --lh-tight: 1.15;
  --lh-normal: 1.5;
  --lh-loose: 1.75;

  /* Spacing scale (4px base) */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;
  --sp-12: 48px;
  --sp-16: 64px;
  --sp-20: 80px;
  --sp-24: 96px;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 999px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.25);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 40px rgba(91,95,239,0.25);

  --container-max: 1200px;
  --transition: 180ms ease;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: var(--lh-normal);
  font-size: var(--fs-base);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-accent); }

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: var(--lh-tight);
  margin: 0 0 var(--sp-4);
  letter-spacing: -0.02em;
}
h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-lg); }
p { margin: 0 0 var(--sp-4); color: var(--color-text-muted); }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--sp-5);
}

.section { padding: var(--sp-16) 0; }
.section-alt { background: var(--color-bg-alt); }

/* Nav */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11,14,23,0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.nav-logo {
  font-weight: 800;
  font-size: var(--fs-md);
  color: var(--color-text);
}
.nav-logo span { color: var(--color-accent); }
.nav-links {
  display: flex;
  gap: var(--sp-6);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a { color: var(--color-text-muted); font-weight: 600; font-size: var(--fs-sm); }
.nav-links a:hover, .nav-links a.active { color: var(--color-text); }
.nav-cta { display: none; }
.nav-toggle {
  display: block;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: var(--fs-lg);
  width: 44px;
  height: 44px;
  cursor: pointer;
}

@media (min-width: 768px) {
  .nav-toggle { display: none; }
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; }
}
@media (max-width: 767px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0; right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--sp-4) var(--sp-5);
    gap: var(--sp-4);
  }
  .nav-links.open { display: flex; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: var(--fs-sm);
  border: none;
  cursor: pointer;
  min-height: 44px;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-accent);
  color: #05130E;
}
.btn-primary:hover { background: var(--color-accent-dark); color: #05130E; transform: translateY(-1px); }
.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover { border-color: var(--color-primary-light); color: var(--color-text); }
.btn-block { width: 100%; }

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--sp-6);
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(91,95,239,0.15);
  color: var(--color-primary-light);
}
.badge-accent { background: rgba(20,241,178,0.12); color: var(--color-accent); }
.badge-pending { background: rgba(245,185,66,0.15); color: var(--color-warning); }

/* Grids */
.grid { display: grid; gap: var(--sp-6); }
.grid-2 { grid-template-columns: 1fr; }
.grid-3 { grid-template-columns: 1fr; }
.grid-4 { grid-template-columns: 1fr; }
@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Hero */
.hero {
  padding: var(--sp-20) 0 var(--sp-16);
  text-align: center;
}
.hero h1 { font-size: var(--fs-3xl); max-width: 800px; margin-left: auto; margin-right: auto; }
.hero p.lede { font-size: var(--fs-md); max-width: 640px; margin: 0 auto var(--sp-8); }
.hero-ctas { display: flex; flex-wrap: wrap; gap: var(--sp-4); justify-content: center; }
@media (min-width: 768px) {
  .hero h1 { font-size: var(--fs-4xl); }
}

/* Forms */
label { display: block; font-size: var(--fs-sm); font-weight: 600; margin-bottom: var(--sp-2); color: var(--color-text); }
input, select, textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 16px; /* prevents iOS zoom */
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-family: var(--font-sans);
  margin-bottom: var(--sp-4);
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-primary-light);
}
textarea { min-height: 100px; resize: vertical; }
.form-row { display: grid; gap: var(--sp-4); }
@media (min-width: 640px) {
  .form-row-2 { grid-template-columns: 1fr 1fr; }
}
.form-success, .form-error {
  padding: var(--sp-4);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  margin-top: var(--sp-4);
}
.form-success { background: rgba(20,241,178,0.1); color: var(--color-accent); border: 1px solid rgba(20,241,178,0.3); }
.form-error { background: rgba(245,86,107,0.1); color: var(--color-danger); border: 1px solid rgba(245,86,107,0.3); }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius-md); }
table { width: 100%; border-collapse: collapse; min-width: 560px; }
th, td { text-align: left; padding: var(--sp-3) var(--sp-4); border-bottom: 1px solid var(--color-border); font-size: var(--fs-sm); }
th { color: var(--color-text-faint); text-transform: uppercase; font-size: var(--fs-xs); letter-spacing: 0.04em; }
td { color: var(--color-text-muted); }
tr:last-child td { border-bottom: none; }

/* Pricing */
.price-card { display: flex; flex-direction: column; height: 100%; }
.price-card .price { font-size: var(--fs-2xl); font-weight: 800; color: var(--color-text); margin: var(--sp-2) 0; }
.price-card .price small { font-size: var(--fs-sm); color: var(--color-text-muted); font-weight: 500; }
.price-card ul { list-style: none; margin: var(--sp-4) 0; padding: 0; flex-grow: 1; }
.price-card li { padding: var(--sp-2) 0; color: var(--color-text-muted); font-size: var(--fs-sm); border-bottom: 1px solid var(--color-border); }
.price-card li:last-child { border-bottom: none; }
.price-card.featured { border-color: var(--color-primary); box-shadow: var(--shadow-glow); }

/* Portfolio */
.portfolio-card img { border-radius: var(--radius-sm); margin-bottom: var(--sp-4); aspect-ratio: 16/10; object-fit: cover; background: var(--color-surface-alt); }

/* Process steps */
.step { display: flex; gap: var(--sp-4); align-items: flex-start; }
.step-num {
  flex-shrink: 0;
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; color: var(--color-accent);
}

/* Footer */
.site-footer { border-top: 1px solid var(--color-border); padding: var(--sp-16) 0 var(--sp-8); background: var(--color-bg-alt); }
.footer-grid { display: grid; gap: var(--sp-8); grid-template-columns: 1fr; margin-bottom: var(--sp-8); }
@media (min-width: 768px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; } }
.footer-grid h4 { font-size: var(--fs-sm); color: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: var(--sp-3); }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: var(--sp-2); }
.footer-grid a { color: var(--color-text-muted); font-size: var(--fs-sm); }
.footer-bottom { border-top: 1px solid var(--color-border); padding-top: var(--sp-6); font-size: var(--fs-xs); color: var(--color-text-faint); }
.footer-disclosure { font-size: var(--fs-xs); color: var(--color-text-faint); max-width: 800px; margin-bottom: var(--sp-4); line-height: var(--lh-loose); }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--color-border); padding: var(--sp-5) 0; }
.faq-item summary { cursor: pointer; font-weight: 700; color: var(--color-text); list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; float: right; color: var(--color-accent); }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item p { margin-top: var(--sp-3); }

/* Utility */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.muted { color: var(--color-text-muted); }
.disclosure-note {
  font-size: var(--fs-xs);
  color: var(--color-text-faint);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--sp-4);
  margin: var(--sp-6) 0;
}

/* Fade-up animation */
.fade-up { opacity: 0; transform: translateY(16px); transition: opacity 500ms ease, transform 500ms ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* Article prose */
.prose { max-width: 760px; margin: 0 auto; }
.prose h2 { margin-top: var(--sp-10); }
.prose h3 { margin-top: var(--sp-8); }
.prose p, .prose li { color: var(--color-text-muted); font-size: var(--fs-md); line-height: var(--lh-loose); }
.prose a { color: var(--color-accent); }
.byline { color: var(--color-text-faint); font-size: var(--fs-sm); margin-bottom: var(--sp-8); }