:root {
  --bg-1: #0b1324;
  --bg-2: #111b2e;
  --panel: rgba(14, 20, 35, 0.9);
  --panel-border: rgba(255, 255, 255, 0.08);
  --panel-soft: rgba(255, 255, 255, 0.03);
  --text: #edf2ff;
  --muted: #b9c5dd;
  --primary: #f7b267;
  --primary-2: #f4845f;
  --accent: #5ec3c5;
  --danger: #f25f5c;
  --canvas-bg: radial-gradient(circle at center, #14253d 0%, #0b1324 58%, #08111d 100%);
  --shadow: 0 12px 28px rgba(3, 6, 15, 0.45);
}

.app-shell.is-light-theme {
  --bg-1: #eaf0f7;
  --bg-2: #dce5f0;
  --panel: rgba(255, 255, 255, 0.92);
  --panel-border: rgba(28, 46, 68, 0.16);
  --panel-soft: rgba(28, 46, 68, 0.06);
  --text: #172638;
  --muted: #53677c;
  --canvas-bg: radial-gradient(circle at center, #ffffff 0%, #e5edf6 60%, #d6e1ee 100%);
  --shadow: -12px 0 28px rgba(51, 76, 105, 0.16);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  background: var(--bg-1);
  color: var(--text);
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  min-height: 100vh;
}

button,
input {
  font: inherit;
}

.app-shell {
  position: relative;
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background: var(--canvas-bg);
}

.graph-area {
  position: relative;
  width: 100%;
  height: 100%;
}

.graph-container {
  width: 100%;
  height: 100%;
  background: var(--canvas-bg);
}

.control-panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 320px;
  min-width: 320px;
  background: var(--panel);
  border-left: 1px solid var(--panel-border);
  box-shadow: var(--shadow);
  transition: width 0.2s ease, min-width 0.2s ease, transform 0.2s ease;
  z-index: 2;
}

.control-panel.is-collapsed {
  width: 56px;
  min-width: 56px;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 14px 12px;
  border-bottom: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.02);
}

.panel-header h1 {
  margin: 0;
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.app-shell.is-light-theme .panel-header h1 {
  color: #0b1b2d;
}

.panel-toggle {
  width: 30px;
  height: 30px;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  cursor: pointer;
}

.panel-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 12px;
}

.control-panel.is-collapsed .panel-body,
.control-panel.is-collapsed .panel-header h1 {
  display: none;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.theme-field {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}

.theme-label {
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.theme-toggle {
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 7px 10px;
  background: var(--panel-soft);
  color: var(--text);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 700;
}

.field label {
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.field input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

.primary-button {
  width: 100%;
  padding: 10px 12px;
  border: none;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
  color: #1a120d;
  font-weight: 700;
  cursor: pointer;
}

.stats-box {
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--panel-soft);
  border: 1px solid var(--panel-border);
}

.stats-box div {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 4px 0;
  color: var(--muted);
}

.stats-box strong {
  color: var(--text);
}

.node-details {
  gap: 4px;
  padding: 10px 12px;
  border: 1px solid rgba(247, 178, 103, 0.35);
  border-radius: 8px;
  background: rgba(247, 178, 103, 0.08);
}

.node-details-label {
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.node-details > strong {
  color: var(--text);
  font-size: 1rem;
}

.node-details div {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: var(--muted);
}

.node-details div strong {
  color: var(--text);
}

.status {
  min-height: 44px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid rgba(94, 195, 197, 0.35);
  background: rgba(94, 195, 197, 0.08);
  color: var(--text);
  font-size: 0.9rem;
}

@media (max-width: 720px) {
  .control-panel {
    width: 280px;
    min-width: 280px;
  }

  .control-panel.is-collapsed {
    width: 56px;
    min-width: 56px;
  }
}