/* ============================================================
   GLOBAL CSS — sell-usdt-to-naira.com
   ============================================================ */

:root {
  --color-primary:   #1A7F5A;
  --color-primary-dark: #145F44;
  --color-primary-light: #EDF7F3;
  --color-accent:    #F0B429;
  --color-accent-dark: #C9920A;
  --color-bg:        #F7F9F8;
  --color-surface:   #FFFFFF;
  --color-text:      #1A1F1E;
  --color-muted:     #5A6B66;
  --color-border:    #D6E4DF;
  --color-warning-bg: #FFFBEB;
  --color-warning-border: #F0B429;
  --color-info-bg:   #EDF7F3;
  --color-info-border: #1A7F5A;
  --max-width:       1160px;
  --radius:          12px;
  --radius-sm:       8px;
  --radius-lg:       16px;
  --shadow-card:     0 2px 12px rgba(26,31,30,0.08), 0 1px 3px rgba(26,31,30,0.06);
  --shadow-elevated: 0 8px 32px rgba(26,31,30,0.12), 0 2px 8px rgba(26,31,30,0.08);
  --transition:      0.18s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'Segoe UI', system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5 {
  font-family: 'Plus Jakarta Sans', 'Segoe UI', system-ui, sans-serif;
  line-height: 1.25;
  letter-spacing: -0.03em;
  color: var(--color-text);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-primary-dark); text-decoration: underline; }
a:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: 3px; }

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

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

ul, ol { padding-left: 1.5rem; }
li { margin-bottom: 0.35rem; }

/* ── Container ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ── Section spacing ── */
.section { padding: 4rem 0; }
.section--sm { padding: 2.5rem 0; }
.section--lg { padding: 6rem 0; }

/* ── Header ── */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(26,31,30,0.06);
}

.site-header .container {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.site-logo__img { height: 56px; width: 280px; display: block; }

/* ── Navigation ── */
.site-nav { display: none; }
.site-nav.is-open { display: flex; }

.nav-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.nav-list a {
  display: block;
  padding: 0.6rem 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition);
}
.nav-list a:hover { background: var(--color-primary-light); color: var(--color-primary); text-decoration: none; }
.nav-list a.active { color: var(--color-primary); font-weight: 600; }
.nav-list a:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

.nav-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-toggle:hover { background: var(--color-primary-light); }
.nav-toggle:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.nav-toggle svg { width: 24px; height: 24px; stroke: currentColor; stroke-width: 2; fill: none; }

/* Mobile nav overlay */
@media (max-width: 767px) {
  .site-nav {
    position: fixed;
    inset: 64px 0 0 0;
    background: var(--color-surface);
    padding: 1.5rem;
    z-index: 99;
    border-top: 1px solid var(--color-border);
    box-shadow: 0 8px 32px rgba(26,31,30,0.12);
  }
  .site-nav.is-open { display: block; }
}

@media (min-width: 768px) {
  .site-nav { display: flex !important; align-items: center; }
  .nav-list { flex-direction: row; gap: 0.25rem; }
  .nav-toggle { display: none; }
}

/* ── Footer ── */
.site-footer {
  background: #1A1F1E;
  color: #B8C9C4;
  padding: 3rem 0 1.5rem;
  margin-top: 4rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-col h4 {
  color: #FFFFFF;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
  padding: 0;
}

.footer-col ul li { margin-bottom: 0.4rem; }

.footer-col ul a {
  color: #B8C9C4;
  font-size: 0.9rem;
  transition: color var(--transition);
}
.footer-col ul a:hover { color: #FFFFFF; text-decoration: none; }

.footer-disclaimer {
  font-size: 0.8rem;
  line-height: 1.6;
  color: #8A9E98;
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-top: 1.5rem;
  font-size: 0.8rem;
  color: #8A9E98;
}

@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 2fr; }
  .footer-bottom { flex-direction: row; justify-content: space-between; }
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  line-height: 1.2;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; }

.btn-primary {
  background: var(--color-accent);
  color: #1A1F1E;
  border-color: var(--color-accent);
  box-shadow: 0 4px 14px rgba(240,180,41,0.35);
}
.btn-primary:hover { background: var(--color-accent-dark); border-color: var(--color-accent-dark); box-shadow: 0 6px 20px rgba(240,180,41,0.45); }

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-secondary:hover { background: var(--color-primary-light); }

.btn-outline-white {
  background: transparent;
  color: #FFFFFF;
  border-color: rgba(255,255,255,0.6);
}
.btn-outline-white:hover { background: rgba(255,255,255,0.1); border-color: #FFFFFF; }

.btn-sm { padding: 0.5rem 1rem; font-size: 0.85rem; }
.btn-lg { padding: 1rem 2rem; font-size: 1.05rem; }

/* ── Cards ── */
.card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 1.5rem;
}

/* ── Notice boxes ── */
.notice {
  display: flex;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  line-height: 1.5;
}
.notice svg { flex-shrink: 0; width: 18px; height: 18px; margin-top: 1px; }
.notice--info { background: var(--color-info-bg); border-left: 3px solid var(--color-primary); color: #1A4D3A; }
.notice--info svg { stroke: var(--color-primary); }
.notice--warning { background: var(--color-warning-bg); border-left: 3px solid var(--color-warning-border); color: #6B4A00; }
.notice--warning svg { stroke: var(--color-accent-dark); }
.notice--legal { background: #FFF8ED; border-left: 3px solid #F0B429; color: #6B4A00; font-style: italic; }
.notice--legal svg { stroke: #C9920A; }

/* ── Badge / pill ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.2rem 0.6rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.4;
}
.badge--teal  { background: var(--color-primary-light); color: var(--color-primary); }
.badge--gold  { background: #FFF3CC; color: #8A5A00; }
.badge--dark  { background: rgba(255,255,255,0.12); color: #FFFFFF; }

/* ── Utility ── */
.text-muted { color: var(--color-muted); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

/* ── Responsive images ── */
figure { margin: 0; }