/* Base */
* { box-sizing: border-box; }
:root {
  --bg: #0b1020;
  --panel: #0f172a;
  --panel-2: #111827;
  --muted: #94a3b8;
  --text: #e5e7eb;
  --primary: #2563eb;
  --primary-2: #1d4ed8;
  --stroke: #263045;
  --ghost: #1f2937;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}
body.dark {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial;
  background: radial-gradient(1200px 600px at 80% 10%, #0f1530 0%, #0b1020 55%) no-repeat, var(--bg);
  color: var(--text);
}

/* Nav */
.nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 18px 20px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo { display:flex; align-items:center; gap:10px; }
.logo-badge { font-size: 22px; }
.logo-text { font-weight: 700; font-size: 18px; letter-spacing: .2px; }
.nav-right { display: flex; align-items: center; gap: 18px; }
.nav-link { color: var(--muted); text-decoration: none; font-size: 14px; }
.nav-link:hover { color: var(--text); }

/* Buttons */
.btn {
  font-size: 20px; padding: 16px 20px; border-radius: 10px; border: 1px solid transparent; cursor: pointer;
  transition: transform .12s ease, background .2s ease, border-color .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-2); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--stroke); }
.btn-ghost:hover { background: #0f172a; }
.btn-block { width: 100%; }

/* Hero */
.hero {
  max-width: 1200px; margin: 32px auto 0; padding: 40px 20px 0;
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 32px; align-items: center;
}
.hero-title {
  font-size: clamp(34px, 5.2vw, 54px);
  line-height: 1.05; margin: 0 0 16px;
}
.hero-sub { color: var(--muted); max-width: 560px; margin-bottom: 20px; font-size: 18px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap;}
.hero-right { display: flex; justify-content: center; align-items: center; }
.hero-illus { width: 100%; max-width: 440px; filter: drop-shadow(0 30px 60px rgba(37,99,235,.25)); }

/* Sections */
.section-title { text-align: center; font-size: 28px; margin: 24px 0 18px; }
.features { max-width: 1200px; margin: 40px auto; padding: 0 20px 20px; }
.features-grid {
  display: grid; gap: 18px; grid-template-columns: repeat(4, 1fr);
}
.feature {
  background: linear-gradient(180deg, rgba(31,41,55,.55), rgba(17,24,39,.6));
  border: 1px solid var(--stroke);
  border-radius: 16px; padding: 22px; box-shadow: var(--shadow);
}
.feature-icon { font-size: 28px; margin-bottom: 10px; }
.feature h3 { margin: 0 0 6px; font-size: 16px; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; }

.how { max-width: 960px; margin: 10px auto 60px; padding: 0 20px; color: var(--muted); }
.how-steps { max-width: 720px; margin: 8px auto 0; }
.how-steps li { margin: 8px 0; }

/* Modals */
.modal {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,.66);
  z-index: 60; padding: 20px; overflow: auto;
}
.modal-card {
  background: var(--panel-2); border: 1px solid var(--stroke); color: var(--text);
  width: 100%; max-width: 560px; margin: 8vh auto; border-radius: 16px; padding: 22px;
  box-shadow: var(--shadow);
}
.modal-card--sm { max-width: 400px; }
.center { text-align: center; }
.mt-16 { margin-top: 16px; }
.modal-close {
  float: right; border: none; background: transparent; color: var(--muted); cursor: pointer; font-size: 18px;
}
.modal-title { margin: 4px 0 14px; }

/* Wallet grid */
.wallet-grid {
  display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
}
.wallet {
  background: #101827; border: 1px solid var(--stroke); border-radius: 14px;
  padding: 14px; text-align: center; cursor: pointer; transition: transform .12s ease, background .2s ease;
}
.wallet:hover { background: #0f172a; transform: translateY(-2px); }
.wallet img { width: 46px; height: 46px; object-fit: contain; display:block; margin: 6px auto 10px; }
.wallet span { font-size: 14px; color: var(--text); }

/* Connecting */
.spinner {
  width: 46px; height: 46px; border-radius: 50%;
  border: 4px solid #e5e7eb22; border-top-color: var(--primary);
  margin: 16px auto; animation: spin 1s linear infinite;
}
.connecting-text { text-align: center; color: var(--muted); }
@keyframes spin { to { transform: rotate(360deg); } }

/* Tabs + Form */
.tabs { display: flex;  gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.tab {
  padding: 8px 12px; font-size: 16px; border-radius: 10px; border: 1px solid var(--stroke);
  background: #0f172a; color: var(--text); cursor: pointer;
}
.tab.active, .tab:hover { background: var(--primary); border-color: transparent; }

#feedbackForm textarea {
  width: 100%; min-height: 130px; padding: 12px; border-radius: 12px;
  background: #0b1224; color: var(--text); border: 1px solid var(--stroke);
  resize: vertical; margin-bottom: 12px;
}

/* Responsive */
@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; text-align: center; }
  .hero-left { order: 2; }
  .hero-right { order: 1; }
}
@media (max-width: 800px) {
  .features-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .features-grid { grid-template-columns: 1fr; }
}