:root {
  --bg-primary: #1c1c1c;
  --bg-secondary: #252525;
  --bg-tertiary: #2e2e2e;
  --bg-hover: #383838;
  --text-primary: #e8e8e8;
  --text-secondary: #a0a0a0;
  --text-muted: #707070;
  --border: #3a3a3a;
  --accent-blue: #4a9eff;
  --accent-blue-hover: #3a8eef;
  --accent-green: #4ade80;
  --accent-red: #f87171;
  --accent-orange: #fb923c;
  --accent-purple: #a78bfa;
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  margin: 0;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 1rem;
}

header h1 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
  font-weight: 600;
  text-align: center;
  color: var(--text-primary);
}

.panel {
  background: var(--bg-secondary);
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 0.75rem;
  border: 1px solid var(--border);
}

.panel h2 {
  margin: 0 0 0.75rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.status-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.status-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.5rem;
  background: var(--bg-tertiary);
  border-radius: 8px;
}

.status-item .label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.status-item .value {
  font-size: 0.85rem;
  word-break: break-all;
  color: var(--text-primary);
}

.form-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.form-row label {
  font-size: 0.85rem;
  flex: 1;
  min-width: 120px;
  color: var(--text-secondary);
}

.form-row input[type="number"] {
  width: 70px;
  padding: 0.6rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 1rem;
  text-align: center;
}

.form-row input[type="number"]:focus {
  outline: none;
  border-color: var(--accent-blue);
}

.form-row button,
.button-row button {
  padding: 0.7rem 1rem;
  border: none;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, transform 0.1s;
  touch-action: manipulation;
}

.form-row button:active,
.button-row button:active {
  transform: scale(0.98);
}

.button-row button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#saveSettings {
  background: var(--accent-purple);
  color: #fff;
}

#saveSettings:hover {
  background: #9171ea;
}

#btnRedeem {
  background: var(--accent-blue);
  color: #fff;
}

#btnRedeem:hover {
  background: var(--accent-blue-hover);
}

#btnCheck {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

#btnCheck:hover {
  background: var(--bg-hover);
}

#btnStartAuto {
  background: var(--accent-green);
  color: #1c1c1c;
}

#btnStartAuto:hover {
  background: #3ace70;
}

#btnStopAuto {
  background: var(--accent-red);
  color: #fff;
}

#btnStopAuto:hover {
  background: #e86161;
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

#positionsContainer {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

#positionsTable {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  min-width: 400px;
}

#positionsTable th,
#positionsTable td {
  padding: 0.6rem 0.5rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

#positionsTable th {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  position: sticky;
  top: 0;
  background: var(--bg-secondary);
}

#positionsTable tbody tr:hover {
  background: var(--bg-tertiary);
}

#positionsTable td:first-child {
  max-width: 150px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.empty-msg {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin: 0.5rem 0 0;
  text-align: center;
}

#positionsEmpty.hidden {
  display: none;
}

#positionsTable.hidden {
  display: none;
}

#activityLog {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 180px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

#activityLog li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

#activityLog li .time {
  color: var(--text-muted);
  font-size: 0.7rem;
  width: 100%;
}

#activityLog li.success {
  color: var(--accent-green);
}

#activityLog li.error {
  color: var(--accent-red);
}

.status-panel .value.active {
  color: var(--accent-green);
  font-weight: 500;
}

.status-panel .value.stopped {
  color: var(--accent-red);
}

@media (min-width: 480px) {
  .container {
    padding: 1.5rem;
  }

  header h1 {
    font-size: 1.5rem;
    text-align: left;
  }

  .panel {
    padding: 1.25rem;
    margin-bottom: 1rem;
  }

  .panel h2 {
    font-size: 1rem;
  }

  .status-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .status-item .label {
    font-size: 0.75rem;
  }

  .status-item .value {
    font-size: 0.9rem;
  }

  .button-row {
    display: flex;
    flex-wrap: wrap;
  }

  #positionsTable {
    font-size: 0.85rem;
  }

  #positionsTable td:first-child {
    max-width: none;
    white-space: normal;
  }

  #activityLog li {
    flex-wrap: nowrap;
  }

  #activityLog li .time {
    width: auto;
    margin-right: 0.5rem;
  }
}

@media (min-width: 768px) {
  .status-item {
    padding: 0.75rem;
  }
  
  #positionsTable th,
  #positionsTable td {
    padding: 0.75rem;
  }
}