:root {
  --bg: #0f172a;
  --panel-bg: rgba(30, 41, 59, 0.7);
  --text: #e2e8f0;
  --accent: #38bdf8;
  --border: rgba(255, 255, 255, 0.1);
  --success: #34d399;
}

body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  background: radial-gradient(circle at top, #1e293b, var(--bg));
  color: var(--text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  text-align: center;
  padding: 2rem;
  border-bottom: 1px solid var(--border);
  background: rgba(0,0,0,0.2);
}

h1 {
  margin: 0;
  font-weight: 600;
  color: #fff;
  letter-spacing: -0.5px;
}

header p {
  color: #94a3b8;
  margin-top: 0.5rem;
}

.main-layout {
  padding: 2rem;
  max-width: 1600px;
  margin: 0 auto;
  width: 95%;
  box-sizing: border-box;
}

.upload-area {
  display: block;
  padding: 4rem 2rem;
  text-align: center;
  border: 2px dashed var(--border);
  border-radius: 12px;
  background: var(--panel-bg);
  cursor: pointer;
  transition: all 0.2s;
  backdrop-filter: blur(10px);
}

.upload-area:hover {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.05);
}

.actions {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 2rem;
}

.btn {
  background: rgba(255,255,255,0.1);
  color: #fff;
  border: 1px solid var(--border);
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s;
}

.btn:hover {
  background: rgba(255,255,255,0.15);
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0f172a;
}

.btn.primary:hover {
  background: #7dd3fc;
}

.bindings-grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.device-card {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  backdrop-filter: blur(10px);
}

.device-card h2 {
  margin-top: 0;
  color: var(--accent);
  font-size: 1.2rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1rem;
  margin-bottom: 1rem;
}

.hw-row {
  display: flex;
  align-items: flex-start;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.hw-row:last-child {
  border-bottom: none;
}

.hw-name {
  flex: 0 0 250px;
  font-weight: 600;
  color: #cbd5e1;
  padding-top: 0.4rem;
}

.hw-actions {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.action-bind {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.action-select {
  flex: 1;
  background: rgba(0,0,0,0.4);
  border: 1px solid var(--border);
  color: #fff;
  padding: 0.4rem;
  border-radius: 6px;
  font-family: inherit;
}

.mod-select {
  flex: 0 0 90px;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid var(--border);
  color: #94a3b8;
  padding: 0.4rem;
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.85rem;
}

.remove-btn, .add-btn {
  background: none;
  border: none;
  color: #94a3b8;
  cursor: pointer;
  padding: 0.2rem 0.5rem;
  font-size: 1.2rem;
}

.remove-btn:hover { color: #ef4444; }
.add-btn {
  font-size: 0.9rem;
  color: var(--accent);
  text-align: left;
  padding: 0.4rem 0;
  width: max-content;
}
.add-btn:hover { text-decoration: underline; }