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

:root {
  --bg1: #0f172a;
  --bg2: #1e293b;
  --card: rgba(255,255,255,0.08);
  --card-border: rgba(255,255,255,0.12);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --primary: #7c3aed;
  --secondary: #06b6d4;
  --danger: #ef4444;
  --shadow: 0 18px 50px rgba(0,0,0,0.35);
}

body {
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(124,58,237,0.35), transparent 35%),
    radial-gradient(circle at top right, rgba(6,182,212,0.22), transparent 35%),
    linear-gradient(135deg, var(--bg1), var(--bg2));
}

.app-shell {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 22px;
}

.topbar h1 {
  font-size: 2rem;
  margin-bottom: 6px;
}

.topbar p {
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: 1fr 1fr;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
  border-radius: 24px;
  padding: 22px;
}

.hero {
  grid-column: 1 / -1;
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.field label,
.setting-group label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

select,
input[type="text"],
input[type="password"],
textarea {
  width: 100%;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(15,23,42,0.55);
  color: var(--text);
  border-radius: 16px;
  padding: 14px 16px;
  outline: none;
}

select:focus,
input:focus,
textarea:focus {
  border-color: rgba(124,58,237,0.8);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.2);
}

textarea {
  min-height: 240px;
  resize: vertical;
  line-height: 1.6;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.btn,
.small-btn,
.icon-button {
  border: 0;
  cursor: pointer;
  transition: 0.2s ease;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 18px;
  border-radius: 14px;
  color: white;
  font-weight: 600;
}

.primary { background: linear-gradient(135deg, var(--primary), #a855f7); }
.secondary { background: linear-gradient(135deg, var(--secondary), #14b8a6); }
.danger { background: linear-gradient(135deg, var(--danger), #fb7185); }
.ghost {
  background: rgba(255,255,255,0.08);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.12);
}

.btn:hover,
.small-btn:hover,
.icon-button:hover {
  transform: translateY(-2px);
  opacity: 0.95;
}

.icon-button {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: rgba(255,255,255,0.08);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.12);
}

.panel-head,
.modal-head,
.meter-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.panel-head h2 {
  font-size: 1.2rem;
}

.small-btn {
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(255,255,255,0.08);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.12);
}

.meter-wrap {
  margin-top: 18px;
}

.meter-label {
  margin-bottom: 10px;
  color: var(--muted);
}

.meter-track {
  height: 10px;
  width: 100%;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  overflow: hidden;
}

.meter-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #22c55e, #06b6d4, #7c3aed);
  transition: width 0.1s linear;
}

.stats {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.stat {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
}

.stat-label {
  display: block;
  color: var(--muted);
  margin-bottom: 8px;
}

.stat-value {
  font-size: 1.15rem;
  font-weight: 700;
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  z-index: 1000;
}

.modal-content {
  width: min(640px, 100%);
  background: rgba(15,23,42,0.95);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 24px;
  padding: 22px;
  box-shadow: var(--shadow);
}

.setting-group {
  margin-top: 16px;
}

.setting-group.inline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.setting-group input[type="range"] {
  width: 100%;
  margin-top: 6px;
}

.setting-actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.divider {
  border: none;
  border-top: 1px solid rgba(255,255,255,0.12);
  margin: 20px 0;
}

.hint {
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.5;
}

.hidden {
  display: none !important;
}

@media (max-width: 900px) {
  .grid,
  .row,
  .stats {
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }
}