/* ============================================================
   GLOBAL.CSS — Reset, Typography, Layout, Header, Footer
   best-platform-to-sell-ethereum-in-nigeria.com
   ============================================================ */

/* --- Custom Properties --- */
:root {
  --bg:         #FFFFFF;
  --bg-alt:     #F7F8FA;
  --surface:    #FFFFFF;
  --surface-2:  #F0F2F7;
  --border:     #E4E6ED;
  --border-2:   #CDD0DB;
  --text:       #0F1117;
  --muted:      #6B7280;
  --muted-2:    #9CA3AF;
  --accent:     #627EEA;
  --accent-dk:  #4A65D4;
  --accent-lt:  #EEF1FD;
  --green:      #10B981;
  --green-lt:   #ECFDF5;
  --red:        #EF4444;
  --red-lt:     #FEF2F2;
  --yellow:     #F59E0B;
  --yellow-lt:  #FFFBEB;

  --max-width:  860px;
  --radius:     8px;
  --radius-sm:  5px;
  --radius-lg:  12px;

  --font-body:  -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono:  'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', 'Courier New', monospace;
}

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

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

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--accent-dk);
  text-decoration: underline;
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.site-header .container {
  height: 56px;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  text-decoration: none;
}

.site-logo:hover {
  text-decoration: none;
  opacity: 0.85;
}

.site-logo__img {
  height: 28px;
  width: auto;
  display: block;
}

/* --- Nav --- */
.site-nav {
  display: none;
  flex-direction: column;
  position: absolute;
  top: 56px;
  left: 0;
  right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1.25rem;
  gap: 0;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.site-nav.is-open {
  display: flex;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--border);
  transition: color 0.12s;
  text-decoration: none;
}

.site-nav a:last-child {
  border-bottom: none;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--accent);
  text-decoration: none;
}

/* --- Hamburger --- */
.nav-toggle {
  margin-left: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px 4px;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* --- Desktop nav --- */
@media (min-width: 768px) {
  .site-nav {
    display: flex;
    flex-direction: row;
    position: static;
    background: none;
    border: none;
    padding: 0;
    gap: 0;
    margin-left: auto;
    box-shadow: none;
  }

  .site-nav a {
    padding: 0.35rem 0.7rem;
    border-bottom: none;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
  }

  .site-nav a:hover {
    background: var(--accent-lt);
    color: var(--accent);
  }

  .site-nav a.active {
    color: var(--accent);
    background: var(--accent-lt);
  }

  .nav-toggle {
    display: none;
  }
}

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  margin-top: 4rem;
  padding: 2rem 0;
  color: var(--muted);
  font-size: 0.82rem;
}

.site-footer .container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.25rem;
}

.footer-nav a {
  color: var(--muted);
  transition: color 0.12s;
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--accent);
  text-decoration: none;
}

.footer-disclaimer {
  font-size: 0.78rem;
  line-height: 1.6;
  max-width: 640px;
  color: var(--muted-2);
}

@media (min-width: 768px) {
  .site-footer .container {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2rem;
  }

  .footer-right {
    text-align: right;
    flex-shrink: 0;
  }
}

/* --- Utility --- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* --- Trust page prose --- */
.trust-page {
  padding: 2.5rem 0 4rem;
}

.trust-page h1 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 0.5rem;
  line-height: 1.25;
}

.trust-page .page-meta {
  font-size: 0.8rem;
  color: var(--muted-2);
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.trust-page h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin: 2rem 0 0.75rem;
  letter-spacing: -0.015em;
}

.trust-page h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin: 1.5rem 0 0.5rem;
}

.trust-page p {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--muted);
  margin-bottom: 1rem;
}

.trust-page p:last-child {
  margin-bottom: 0;
}

.trust-page ul, .trust-page ol {
  margin: 0.75rem 0 1rem 1.25rem;
}

.trust-page li {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.trust-page a {
  color: var(--accent);
}

.trust-page strong {
  color: var(--text);
  font-weight: 600;
}

/* --- Contact form --- */
.contact-form {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 560px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.01em;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.6rem 0.85rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(98,126,234,0.12);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-submit {
  display: inline-flex;
  align-items: center;
  padding: 0.65rem 1.5rem;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.15s;
  width: fit-content;
  text-decoration: none;
}

.form-submit:hover {
  background: var(--accent-dk);
  color: #fff;
  text-decoration: none;
}

.form-note {
  font-size: 0.78rem;
  color: var(--muted-2);
  margin-top: 0.5rem;
}