:root {
  --bg-deep: #05120C;
  --bg-mid: #0A1A12;
  --lime: #BFFF00;
  --lime-soft: #7CFF6B;
  --text: #E8F5EE;
  --muted: #94B8A5;
  --card: rgba(10, 26, 18, .82);
  --border: rgba(124, 255, 107, .18);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: radial-gradient(ellipse at 50% -10%, #0f2a1c 0%, var(--bg-mid) 35%, var(--bg-deep) 100%);
  color: var(--text);
  min-height: 100vh;
}
.hidden { display: none !important; }
.muted { color: var(--muted); font-size: .9rem; }
.msg { font-size: .82rem; margin-top: .5rem; min-height: 1.2em; }
.msg.error { color: #ff7b7b; }
.msg.success { color: var(--lime-soft); }

.app-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(5, 18, 12, .82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.app-header-inner {
  max-width: 960px; margin: 0 auto; padding: .75rem 1rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.brand { display: flex; align-items: center; gap: .55rem; font-weight: 800; }
.btn-ghost {
  background: transparent; border: 1px solid var(--border); color: var(--text);
  border-radius: 999px; padding: .45rem .9rem; font-size: .8rem; cursor: pointer;
}
.btn-lime {
  background: linear-gradient(90deg, var(--lime), var(--lime-soft));
  color: #000; font-weight: 800; border: 0; border-radius: 999px;
  padding: .75rem 1.2rem; cursor: pointer; transition: transform .2s ease;
}
.btn-lime:hover { transform: translateY(-1px); }
.btn-lime:disabled { opacity: .6; cursor: wait; }

.app-main { max-width: 960px; margin: 0 auto; padding: 1.25rem 1rem 4rem; }

.auth-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 1.25rem; padding: 1.5rem; max-width: 420px; margin: 2rem auto;
}
.auth-card h1 { font-size: 1.35rem; margin: 0 0 .25rem; }
.stack { display: flex; flex-direction: column; gap: .65rem; margin-top: 1.25rem; }
.stack label { font-size: .8rem; color: var(--muted); }
.stack input, .app-toolbar input, .app-toolbar select {
  background: rgba(0,0,0,.35); border: 1px solid var(--border);
  color: var(--text); border-radius: .75rem; padding: .7rem .85rem;
  font-size: .95rem; width: 100%;
}
.stack input:focus, .app-toolbar input:focus, .app-toolbar select:focus {
  outline: none; border-color: var(--lime);
}

.app-toolbar {
  display: grid; grid-template-columns: 1fr auto; gap: .6rem; margin-bottom: 1rem;
}
@media (max-width: 520px) { .app-toolbar { grid-template-columns: 1fr; } }

.tabs { display: flex; gap: .4rem; margin-bottom: 1rem; flex-wrap: wrap; }
.tab {
  background: transparent; border: 1px solid var(--border); color: var(--muted);
  border-radius: 999px; padding: .45rem .95rem; font-size: .82rem; font-weight: 600;
  cursor: pointer;
}
.tab.active { background: rgba(191,255,0,.12); border-color: var(--lime); color: var(--lime); }

.card-grid { display: grid; gap: .75rem; grid-template-columns: 1fr; }
@media (min-width: 640px) { .card-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 900px) { .card-grid { grid-template-columns: 1fr 1fr 1fr; } }

.prompt-card, .bonus-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 1rem; padding: 1rem; display: flex; flex-direction: column; gap: .6rem;
}
.prompt-card h3, .bonus-card h3 { margin: 0; font-size: .95rem; }
.prompt-card p, .bonus-card p { margin: 0; font-size: .8rem; color: var(--muted); line-height: 1.45; }
.prompt-category {
  display: inline-block; font-size: .65rem; text-transform: uppercase;
  letter-spacing: .08em; color: var(--lime-soft); font-weight: 700;
}
.card-actions { display: flex; gap: .5rem; margin-top: auto; padding-top: .4rem; }
.card-actions button {
  flex: 1; border: 1px solid var(--border); background: transparent;
  color: var(--text); border-radius: .6rem; padding: .45rem; font-size: .78rem;
  font-weight: 600; cursor: pointer; transition: background .2s ease;
}
.card-actions button:hover { background: rgba(191,255,0,.1); }
.card-actions .fav-btn.active { color: #ff8a00; border-color: #ff8a00; }
.bonus-link {
  display: block; text-align: center; text-decoration: none;
  background: linear-gradient(90deg, var(--lime), var(--lime-soft));
  color: #000; font-weight: 800; border-radius: .6rem; padding: .55rem;
  font-size: .82rem;
}