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

:root {
  --bg: #0d1117;
  --bg2: #161b22;
  --bg3: #21262d;
  --border: #30363d;
  --text: #e6edf3;
  --text2: #8b949e;
  --orange: #f7931a;
  --orange-hover: #e8841a;
  --green: #3fb950;
  --radius: 8px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
}

header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo { font-size: 20px; font-weight: 700; color: var(--orange); letter-spacing: -0.5px; }
.tagline { color: var(--text2); font-size: 13px; }

.layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  height: calc(100vh - 57px);
}

.panel {
  padding: 20px;
  overflow-y: auto;
  border-right: 1px solid var(--border);
}
.panel:last-child { border-right: none; }

.panel-title {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text2);
  margin-bottom: 14px;
}

/* Input panel */
textarea {
  width: 100%;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  line-height: 1.6;
  padding: 12px;
  resize: vertical;
  min-height: 180px;
  outline: none;
  transition: border-color 0.15s;
  font-family: inherit;
}
textarea:focus { border-color: var(--orange); }
textarea::placeholder { color: var(--text2); }

.field-label {
  font-size: 12px;
  color: var(--text2);
  margin: 16px 0 8px;
  font-weight: 500;
}

.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

.btn-toggle {
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--bg2);
  color: var(--text2);
  cursor: pointer;
  font-size: 13px;
  transition: all 0.15s;
}
.btn-toggle:hover { border-color: var(--orange); color: var(--text); }
.btn-toggle.active { background: var(--orange); border-color: var(--orange); color: #000; font-weight: 600; }

.checkboxes { display: flex; gap: 16px; }
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 13px;
  color: var(--text2);
  user-select: none;
}
.checkbox-label input[type="checkbox"] { accent-color: var(--orange); width: 14px; height: 14px; }
.checkbox-label:has(input:checked) { color: var(--text); }

.btn-generate {
  margin-top: 20px;
  width: 100%;
  padding: 12px;
  background: var(--orange);
  color: #000;
  font-weight: 700;
  font-size: 15px;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s;
}
.btn-generate:hover { background: var(--orange-hover); }
.btn-generate:disabled { background: var(--bg3); color: var(--text2); cursor: not-allowed; }

/* Output panel */
.output-cards { display: flex; flex-direction: column; gap: 16px; }

.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg3);
}

.card-title { font-size: 12px; font-weight: 600; color: var(--text2); text-transform: uppercase; letter-spacing: 0.6px; }

.card-meta { display: flex; align-items: center; gap: 10px; }

.char-count { font-size: 11px; color: var(--text2); }

.btn-copy {
  padding: 4px 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text2);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
}
.btn-copy:hover { border-color: var(--orange); color: var(--orange); }
.btn-copy.copied { border-color: var(--green); color: var(--green); }

.card-content {
  padding: 14px;
  white-space: pre-wrap;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
  min-height: 80px;
}

.placeholder-text {
  color: var(--text2);
  font-style: italic;
  font-size: 13px;
}

/* Skeleton loader */
.skeleton {
  background: linear-gradient(90deg, var(--bg3) 25%, var(--bg2) 50%, var(--bg3) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: 4px;
  height: 14px;
  margin: 6px 0;
}
.skeleton.wide { width: 90%; }
.skeleton.medium { width: 65%; }
.skeleton.short { width: 40%; }

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.card-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  background: var(--bg3);
  flex-wrap: wrap;
}

.action-hint {
  font-size: 11px;
  color: var(--text2);
  flex: 1;
  min-width: 120px;
}

.btn-action {
  padding: 5px 12px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text2);
  font-size: 12px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn-action:hover { border-color: var(--orange); color: var(--orange); }
.btn-action.copied { border-color: var(--green); color: var(--green); }
.btn-action-primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #000;
  font-weight: 600;
}
.btn-action-primary:hover { background: var(--orange-hover); border-color: var(--orange-hover); color: #000; }

.error-msg {
  margin-top: 12px;
  padding: 10px 14px;
  background: rgba(248, 81, 73, 0.1);
  border: 1px solid rgba(248, 81, 73, 0.4);
  border-radius: var(--radius);
  color: #f85149;
  font-size: 13px;
}

/* ── Auth modal ─────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  backdrop-filter: blur(4px);
}
.modal-overlay.hidden { display: none; }

.modal {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 24px 48px rgba(0,0,0,0.5);
}

.modal-title { font-size: 20px; font-weight: 700; margin-bottom: 6px; }
.modal-sub { color: var(--text2); font-size: 13px; margin-bottom: 24px; }

.form-field { margin-bottom: 14px; }
.form-field label { display: block; font-size: 12px; color: var(--text2); margin-bottom: 5px; }
.form-field input {
  width: 100%; background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text); font-size: 14px;
  padding: 9px 12px; outline: none; transition: border-color 0.15s;
}
.form-field input:focus { border-color: var(--orange); }

.btn-primary {
  width: 100%; padding: 11px; background: var(--orange); color: #000;
  font-weight: 700; font-size: 14px; border: none; border-radius: var(--radius);
  cursor: pointer; transition: background 0.15s; margin-top: 4px;
}
.btn-primary:hover { background: var(--orange-hover); }
.btn-primary:disabled { background: var(--bg3); color: var(--text2); cursor: not-allowed; }

.btn-google {
  width: 100%; padding: 10px; background: #fff; color: #333;
  font-size: 14px; font-weight: 500; border: 1px solid #ddd;
  border-radius: var(--radius); cursor: pointer; display: flex;
  align-items: center; justify-content: center; gap: 8px;
  transition: background 0.15s; margin-bottom: 16px;
}
.btn-google:hover { background: #f5f5f5; }

.divider {
  display: flex; align-items: center; gap: 10px;
  color: var(--text2); font-size: 12px; margin: 16px 0;
}
.divider::before, .divider::after {
  content: ""; flex: 1; border-top: 1px solid var(--border);
}

.modal-switch { text-align: center; margin-top: 16px; font-size: 13px; color: var(--text2); }
.modal-switch a { color: var(--orange); cursor: pointer; text-decoration: none; }
.modal-switch a:hover { text-decoration: underline; }

.form-error { color: #f85149; font-size: 12px; margin-top: 8px; }

/* ── Header user area ────────────────────────────────────── */
.header-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.user-info { font-size: 13px; color: var(--text2); }
.usage-badge {
  font-size: 11px; padding: 3px 8px;
  border-radius: 10px; border: 1px solid var(--border);
  color: var(--text2);
}
.usage-badge.subscribed { border-color: var(--green); color: var(--green); }
.usage-badge.warning { border-color: var(--orange); color: var(--orange); }

.btn-logout {
  padding: 4px 10px; background: transparent; border: 1px solid var(--border);
  border-radius: 4px; color: var(--text2); font-size: 12px; cursor: pointer;
  transition: all 0.15s;
}
.btn-logout:hover { border-color: #f85149; color: #f85149; }

/* ── Paywall modal ────────────────────────────────────────── */
.paywall-modal .modal-title { color: var(--orange); }

.plan-card {
  background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px; margin-bottom: 12px;
}
.plan-price { font-size: 28px; font-weight: 800; color: var(--text); }
.plan-price span { font-size: 14px; font-weight: 400; color: var(--text2); }
.plan-features { margin: 10px 0; }
.plan-features li { font-size: 13px; color: var(--text2); list-style: none; padding: 3px 0; }
.plan-features li::before { content: "✓ "; color: var(--green); }

.payment-tabs { display: flex; gap: 8px; margin: 16px 0 12px; }
.payment-tab {
  flex: 1; padding: 8px; background: var(--bg3); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text2); font-size: 13px; cursor: pointer;
  text-align: center; transition: all 0.15s;
}
.payment-tab.active { border-color: var(--orange); color: var(--orange); background: rgba(247,147,26,0.08); }

.payment-panel { display: none; }
.payment-panel.active { display: block; }

.usdt-address {
  background: var(--bg3); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 10px 12px; font-family: monospace; font-size: 12px; word-break: break-all;
  color: var(--text); margin: 8px 0;
}
.usdt-note { font-size: 12px; color: var(--text2); margin: 8px 0; line-height: 1.5; }

@media (max-width: 768px) {
  .layout { grid-template-columns: 1fr; height: auto; }
  .panel { border-right: none; border-bottom: 1px solid var(--border); }
  .modal { margin: 16px; }
}