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

:root {
  --green-dark: #2d5016;
  --green-mid: #4a7c2e;
  --green-light: #6ba342;
  --cream: #f5f0e8;
  --brown: #8b6914;
  --brown-light: #c4a35a;
  --text: #1a1a1a;
  --text-light: #666;
  --white: #fff;
  --radius: 12px;
  --shadow: 0 2px 12px rgba(0,0,0,0.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--cream);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

#app {
  max-width: 420px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header */
.header {
  background: linear-gradient(135deg, var(--green-dark), var(--green-mid));
  color: var(--white);
  padding: 20px;
  text-align: center;
  position: relative;
}
.header h1 { font-size: 1.4rem; font-weight: 700; }
.header .subtitle { font-size: 0.85rem; opacity: 0.85; margin-top: 2px; }
.header-btn {
  position: absolute; top: 18px; background: none; border: none;
  color: var(--white); font-size: 1.4rem; cursor: pointer; padding: 4px 8px;
}
.header-btn.left { left: 12px; }
.header-btn.right { right: 12px; }

/* Landing */
.landing {
  flex: 1; display: flex; flex-direction: column;
  align-items: center; justify-content: center; padding: 40px 24px; text-align: center;
}
.landing .logo { font-size: 4rem; margin-bottom: 16px; }
.landing h2 { font-size: 1.6rem; color: var(--green-dark); margin-bottom: 8px; }
.landing p { color: var(--text-light); margin-bottom: 32px; line-height: 1.5; max-width: 300px; }
.landing .terms { font-size: 0.75rem; color: var(--text-light); margin-top: 24px; max-width: 280px; line-height: 1.4; }

/* Buttons */
.btn {
  display: inline-block; padding: 14px 32px; border-radius: var(--radius);
  font-size: 1rem; font-weight: 600; border: none; cursor: pointer;
  transition: transform 0.1s, opacity 0.2s; text-decoration: none;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--green-dark); color: var(--white); }
.btn-secondary { background: var(--white); color: var(--green-dark); border: 2px solid var(--green-dark); }
.btn-small { padding: 10px 20px; font-size: 0.9rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-full { width: 100%; text-align: center; }
.btn-link { background: none; border: none; color: var(--green-mid); cursor: pointer; font-size: 0.9rem; text-decoration: underline; padding: 8px; }

/* Balance card */
.balance-card {
  background: linear-gradient(135deg, var(--green-dark), var(--green-mid));
  color: var(--white); border-radius: var(--radius); padding: 28px 24px;
  margin: 16px; text-align: center; box-shadow: var(--shadow);
}
.balance-label { font-size: 0.85rem; opacity: 0.8; margin-bottom: 4px; }
.balance-amount { font-size: 2.4rem; font-weight: 700; }
.balance-sats { font-size: 0.8rem; opacity: 0.7; margin-top: 4px; }

/* Actions row */
.actions { display: flex; gap: 12px; padding: 0 16px; margin-bottom: 16px; }
.actions .btn { flex: 1; }

/* Card */
.card {
  background: var(--white); border-radius: var(--radius); margin: 0 16px 16px;
  padding: 20px; box-shadow: var(--shadow);
}
.card h3 { font-size: 1rem; color: var(--green-dark); margin-bottom: 12px; }

/* Transactions */
.tx-list { list-style: none; }
.tx-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 0; border-bottom: 1px solid #eee;
}
.tx-item:last-child { border-bottom: none; }
.tx-memo { font-size: 0.9rem; color: var(--text); }
.tx-date { font-size: 0.75rem; color: var(--text-light); }
.tx-amount { font-weight: 600; font-size: 0.95rem; }
.tx-amount.positive { color: var(--green-mid); }
.tx-amount.negative { color: #c0392b; }
.tx-empty { text-align: center; color: var(--text-light); padding: 24px 0; font-size: 0.9rem; }

/* QR */
.qr-container { text-align: center; padding: 16px 0; }
.qr-container canvas, .qr-container img { max-width: 220px; border-radius: 8px; }
.qr-text {
  word-break: break-all; font-size: 0.7rem; color: var(--text-light);
  margin-top: 8px; padding: 8px; background: #f5f5f5; border-radius: 6px;
  max-height: 60px; overflow: auto; cursor: pointer; user-select: all;
}

/* Input */
.input-group { margin-bottom: 16px; }
.input-group label { display: block; font-size: 0.85rem; color: var(--text-light); margin-bottom: 6px; }
.input-group input, .input-group textarea {
  width: 100%; padding: 12px; border: 2px solid #ddd; border-radius: 8px;
  font-size: 1rem; transition: border-color 0.2s; font-family: inherit;
}
.input-group input:focus, .input-group textarea:focus { outline: none; border-color: var(--green-mid); }

/* Modal overlay */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  display: flex; align-items: center; justify-content: center;
  z-index: 100; padding: 20px;
}
.modal {
  background: var(--white); border-radius: var(--radius); padding: 24px;
  width: 100%; max-width: 380px; max-height: 90vh; overflow-y: auto;
}
.modal h3 { color: var(--green-dark); margin-bottom: 16px; text-align: center; }

/* Backup screen */
.backup-screen { flex: 1; padding: 24px; text-align: center; }
.backup-screen h2 { color: var(--green-dark); margin-bottom: 8px; }
.backup-screen p { color: var(--text-light); margin-bottom: 20px; font-size: 0.9rem; line-height: 1.5; }
.backup-code {
  background: #f5f5f5; padding: 16px; border-radius: 8px; font-family: monospace;
  font-size: 0.8rem; word-break: break-all; margin-bottom: 20px; user-select: all; cursor: pointer;
}
.backup-warning { color: #c0392b; font-size: 0.8rem; margin-bottom: 20px; }

/* Spinner */
.spinner {
  display: inline-block; width: 20px; height: 20px; border: 3px solid rgba(255,255,255,0.3);
  border-top-color: var(--white); border-radius: 50%; animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Toast */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: var(--white); padding: 12px 24px;
  border-radius: 24px; font-size: 0.85rem; z-index: 200;
  animation: fadeIn 0.3s;
}
@keyframes fadeIn { from { opacity: 0; transform: translateX(-50%) translateY(10px); } }

/* Footer nav */
.footer-nav {
  display: flex; border-top: 1px solid #ddd; background: var(--white);
  padding: 8px 0; margin-top: auto;
}
.footer-nav button {
  flex: 1; background: none; border: none; padding: 8px; cursor: pointer;
  font-size: 0.7rem; color: var(--text-light); display: flex;
  flex-direction: column; align-items: center; gap: 2px;
}
.footer-nav button.active { color: var(--green-dark); }
.footer-nav button .icon { font-size: 1.3rem; }

/* Loading screen */
.loading-screen {
  flex: 1; display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 16px;
}
.loading-screen .spinner { border-color: rgba(45,80,22,0.2); border-top-color: var(--green-dark); width: 32px; height: 32px; }