/* ==========================================================================
   Puffco Studio — Premium Dark Cyber Glassmorphism Design System
   ========================================================================== */

:root {
  --bg-base: #08090d;
  --bg-card: rgba(16, 20, 30, 0.65);
  --bg-card-hover: rgba(24, 30, 46, 0.75);
  --bg-card-active: rgba(30, 38, 58, 0.85);
  --bg-elevated: rgba(255, 255, 255, 0.04);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(255, 94, 0, 0.35);
  --border-active: rgba(0, 242, 254, 0.45);

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-amber: #ff5722;
  --accent-flame: #ff7a00;
  --accent-cyan: #00f2fe;
  --accent-purple: #9d4edd;
  --accent-green: #10b981;
  --accent-red: #ef4444;

  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.6), 0 0 0 1px var(--border-subtle);
  --shadow-glow-amber: 0 0 35px -5px rgba(255, 122, 0, 0.35);
  --shadow-glow-ready: 0 0 40px -5px rgba(16, 185, 129, 0.45);
}

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

body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* Ambient Radial Glow Layers */
.glow-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.radial-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.22;
  transition: opacity 1s ease;
}

.orb-amber {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, #ff7a00, #ff0055 70%, transparent 100%);
  top: -100px;
  left: 10%;
}

.orb-purple {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #7928ca, #4338ca 70%, transparent 100%);
  bottom: -150px;
  right: 5%;
}

.orb-cyan {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, #00f2fe, #0984e3 70%, transparent 100%);
  top: 40%;
  left: 45%;
  opacity: 0.12;
}

/* Layout */
.app-layout {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 20px 20px 40px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  gap: 20px;
}

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  gap: 16px;
  flex-wrap: wrap;
}

.brand-section {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #ff7a00, #ff0055);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 16px rgba(255, 94, 0, 0.4);
  flex-shrink: 0;
}

.brand-title {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #fff;
  line-height: 1.1;
}

.brand-title span {
  background: linear-gradient(90deg, #ff9900, #ff4500);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Navigation Tabs */
.nav-tabs {
  display: flex;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 4px;
  gap: 4px;
}

.nav-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-tab:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.nav-tab.active {
  background: linear-gradient(135deg, rgba(255, 122, 0, 0.25), rgba(255, 0, 85, 0.25));
  border: 1px solid rgba(255, 122, 0, 0.5);
  color: #fff;
  box-shadow: 0 0 16px -2px rgba(255, 94, 0, 0.4);
}

.tab-badge {
  font-size: 0.65rem;
  font-weight: 800;
  background: linear-gradient(135deg, #ff7a00, #ff0055);
  color: #fff;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
}

.tab-content {
  display: block;
}

.tab-content.hidden {
  display: none !important;
}

/* Header Status Group */
.header-status-group {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  font-weight: 600;
  border: 1px solid var(--border-subtle);
  background: rgba(0, 0, 0, 0.35);
  transition: all 0.3s ease;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.status-connected .status-dot {
  background: var(--accent-green);
  box-shadow: 0 0 10px var(--accent-green);
}

.status-connected {
  border-color: rgba(16, 185, 129, 0.3);
}

.status-disconnected .status-dot {
  background: var(--accent-red);
}

.badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-subtle {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-secondary);
}

.badge-info {
  background: rgba(0, 242, 254, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 242, 254, 0.3);
}

/* Battery Widget */
.battery-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.battery-pill.charging {
  border-color: rgba(16, 185, 129, 0.4);
  color: var(--accent-green);
}

.battery-pill .bolt {
  color: #ffcc00;
  font-size: 0.8rem;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Demo Toggle */
.toggle-demo {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 0.78rem;
  color: var(--text-muted);
  user-select: none;
}

.toggle-demo input { display: none; }

.toggle-track {
  width: 32px;
  height: 18px;
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-full);
  position: relative;
  transition: background 0.25s ease;
}

.toggle-thumb {
  position: absolute;
  top: 2px; left: 2px;
  width: 14px; height: 14px;
  background: #fff;
  border-radius: 50%;
  transition: transform 0.25s ease;
}

.toggle-demo input:checked + .toggle-track {
  background: var(--accent-purple);
}

.toggle-demo input:checked + .toggle-track .toggle-thumb {
  transform: translateX(14px);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  outline: none;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.78rem;
}

.btn-xs {
  padding: 4px 8px;
  font-size: 0.72rem;
}

.btn-primary {
  background: linear-gradient(135deg, #ff6b00, #ff3b00);
  color: #fff;
  box-shadow: 0 4px 14px rgba(255, 94, 0, 0.35);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #ff7a00, #ff4d00);
  box-shadow: 0 6px 20px rgba(255, 94, 0, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-elevated);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.btn-danger-subtle {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.btn-danger-subtle:hover:not(:disabled) {
  background: rgba(239, 68, 68, 0.22);
  color: #fff;
}

/* Dashboard Grid Layout (Tab 1) */
.dashboard-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 20px;
}

@media (max-width: 980px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

.right-stack {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Cards */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: relative;
  overflow: hidden;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.subtitle-tag {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

/* State Tags */
.state-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.state-disconnected {
  background: rgba(100, 116, 139, 0.15);
  color: var(--text-muted);
  border-color: rgba(100, 116, 139, 0.25);
}

.state-idle {
  background: rgba(0, 242, 254, 0.12);
  color: var(--accent-cyan);
  border-color: rgba(0, 242, 254, 0.35);
}

.state-heating {
  background: rgba(255, 94, 0, 0.2);
  color: #ff9900;
  border-color: rgba(255, 94, 0, 0.5);
  animation: pulse-ember 1.2s infinite alternate;
}

.state-ready {
  background: rgba(16, 185, 129, 0.22);
  color: var(--accent-green);
  border-color: rgba(16, 185, 129, 0.6);
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.3);
}

.state-cooldown {
  background: rgba(157, 78, 221, 0.18);
  color: #c77dff;
  border-color: rgba(157, 78, 221, 0.4);
}

.state-sleep {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
}

@keyframes pulse-ember {
  0% { box-shadow: 0 0 4px rgba(255, 94, 0, 0.2); }
  100% { box-shadow: 0 0 20px rgba(255, 94, 0, 0.6); }
}

/* Hero Thermal Dial */
.hero-card {
  align-items: center;
  text-align: center;
}

.gauge-container {
  position: relative;
  width: 320px;
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 6px 0;
}

.gauge-glow-halo {
  position: absolute;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 122, 0, 0.15), transparent 70%);
  filter: blur(20px);
  pointer-events: none;
  transition: all 0.5s ease;
}

.gauge-glow-halo.heating {
  background: radial-gradient(circle, rgba(255, 69, 0, 0.35), transparent 70%);
  filter: blur(30px);
  transform: scale(1.15);
}

.gauge-glow-halo.ready {
  background: radial-gradient(circle, rgba(16, 185, 129, 0.35), transparent 70%);
  filter: blur(35px);
  transform: scale(1.2);
}

.dial-svg {
  width: 100%;
  height: 100%;
  transform: rotate(150deg);
}

.dial-track {
  fill: none;
  stroke: url(#trackGrad);
  stroke-width: 14;
  stroke-linecap: round;
  stroke-dasharray: 502.65 753.98;
}

.dial-progress {
  fill: none;
  stroke: url(#heatGrad);
  stroke-width: 14;
  stroke-linecap: round;
  stroke-dasharray: 502.65 753.98;
  stroke-dashoffset: 502.65;
  transition: stroke-dashoffset 0.4s cubic-bezier(0.2, 0, 0.2, 1);
}

.dial-needle-group {
  transform-box: view-box;
  transform-origin: 160px 160px;
  transition: transform 0.3s cubic-bezier(0.2, 0, 0.2, 1);
  pointer-events: none;
}

.dial-needle {
  stroke: #ff9900;
  stroke-width: 3.5;
  stroke-linecap: round;
  filter: drop-shadow(0 0 6px rgba(255, 153, 0, 0.9));
}

.dial-needle-dot {
  fill: #ffffff;
  stroke: #ff9900;
  stroke-width: 1.5;
  filter: drop-shadow(0 0 5px rgba(255, 153, 0, 0.85));
}

.dial-scale-endpoints {
  position: absolute;
  top: 242px;
  width: 250px;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  opacity: 0.75;
}

.gauge-center {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.temp-sublabel {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 2px;
}

.live-temp-display {
  font-family: var(--font-mono);
  font-size: 3.4rem;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  letter-spacing: -0.04em;
  text-shadow: 0 0 25px rgba(255, 255, 255, 0.25);
  display: flex;
  align-items: baseline;
}

.live-temp-display .unit {
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-left: 4px;
}

.target-temp-display {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-top: 4px;
}

.timer-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  background: rgba(255, 94, 0, 0.25);
  border: 1px solid rgba(255, 94, 0, 0.5);
  color: #ff9900;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  animation: pulse-ember 1.2s infinite alternate;
}

/* Session Command Bar */
.session-actions-bar {
  display: flex;
  width: 100%;
  gap: 12px;
  margin-top: 12px;
}

.btn-sesh-start {
  flex: 2;
  height: 54px;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: #fff;
  background: linear-gradient(135deg, #ff5e00, #ff1a00);
  border: none;
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 24px -4px rgba(255, 69, 0, 0.5);
  cursor: pointer;
  transition: all 0.25s ease;
}

.btn-sesh-start:hover:not(:disabled) {
  box-shadow: 0 8px 30px rgba(255, 69, 0, 0.75);
  background: linear-gradient(135deg, #ff701a, #ff2a00);
}

.btn-sesh-boost {
  flex: 1;
  height: 54px;
  background: rgba(157, 78, 221, 0.15);
  border: 1px solid rgba(157, 78, 221, 0.4);
  color: #d8b4fe;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-sesh-boost:hover:not(:disabled) {
  background: rgba(157, 78, 221, 0.3);
  color: #fff;
  border-color: rgba(157, 78, 221, 0.7);
  box-shadow: 0 0 18px rgba(157, 78, 221, 0.4);
}

.btn-sesh-stop {
  flex: 1;
  height: 54px;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: #fca5a5;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-sesh-stop:hover:not(:disabled) {
  background: rgba(239, 68, 68, 0.25);
  color: #fff;
  border-color: rgba(239, 68, 68, 0.6);
  box-shadow: 0 0 18px rgba(239, 68, 68, 0.4);
}

/* Live Session Heat Curve Card (below dial) */
.live-session-graph-card {
  width: 100%;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: inset 0 0 25px rgba(0, 0, 0, 0.5);
}

.lsg-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.lsg-title-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lsg-legend {
  display: flex;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

.legend-line {
  width: 12px;
  height: 3px;
  border-radius: 2px;
}

.line-target {
  background: #ff9900;
  border-top: 1px dashed #ff9900;
}

.line-actual {
  background: var(--accent-cyan);
  box-shadow: 0 0 6px var(--accent-cyan);
}

.lsg-graph-wrapper {
  display: flex;
  gap: 8px;
  width: 100%;
  height: 160px;
}

.lsg-y-axis {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  width: 32px;
  text-align: right;
  padding: 4px 0;
  user-select: none;
  flex-shrink: 0;
}

.lsg-canvas-container {
  flex: 1;
  height: 100%;
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
}

.lsg-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.lsg-target-line {
  stroke: #ff9900;
  stroke-width: 1.8;
  stroke-dasharray: 4 3;
  opacity: 0.85;
  filter: drop-shadow(0 0 4px rgba(255, 153, 0, 0.5));
  transition: y1 0.3s ease, y2 0.3s ease;
}

.lsg-trail-area {
  pointer-events: none;
}

.lsg-trail-stroke {
  fill: none;
  stroke: var(--accent-cyan);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 8px rgba(0, 242, 254, 0.75));
  pointer-events: none;
}

.lsg-live-dot {
  fill: var(--accent-cyan);
  stroke: #ffffff;
  stroke-width: 2.5;
  filter: drop-shadow(0 0 6px var(--accent-cyan));
  pointer-events: none;
}

.lsg-x-axis {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  padding: 0 4px 0 40px;
  user-select: none;
}

.lsg-footer {
  display: flex;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 8px;
  margin-top: 2px;
}

.lsg-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.lsg-stat-label {
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.lsg-stat-val {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
}

/* Profiles Grid */
.profiles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.profile-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: relative;
}

.profile-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}

.profile-card.active {
  background: rgba(255, 94, 0, 0.12);
  border-color: var(--accent-flame);
  box-shadow: 0 0 20px -5px rgba(255, 122, 0, 0.4);
}

.profile-card.active::before {
  content: "ACTIVE";
  position: absolute;
  top: 10px; right: 12px;
  font-size: 0.65rem;
  font-weight: 800;
  color: var(--accent-flame);
  letter-spacing: 0.08em;
}

.profile-slot-badge {
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.08em;
}

.profile-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
}

.profile-specs {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.825rem;
  color: var(--text-secondary);
}

.profile-specs .p-temp {
  color: #ff9900;
  font-weight: 600;
}

/* Temperature Fine Tuning Panel */
.temp-tuning-panel {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tuning-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tuning-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.tuning-val {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.slider-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-stepper {
  width: 34px; height: 34px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.btn-stepper:hover { background: rgba(255, 255, 255, 0.12); }

.custom-range {
  flex: 1;
  -webkit-appearance: none;
  height: 6px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.12);
  outline: none;
}

.custom-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent-cyan);
  cursor: pointer;
  box-shadow: 0 0 10px var(--accent-cyan);
  transition: transform 0.1s ease;
}

.custom-range::-webkit-slider-thumb:hover { transform: scale(1.2); }

.btn-apply { padding: 6px 14px; font-size: 0.8rem; }

.preset-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.preset-pill {
  flex: 1;
  min-width: 80px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 6px 8px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.preset-pill:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

/* Hardware Metrics */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.metric-box {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.metric-icon {
  width: 38px; height: 38px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.chamber-icon { background: rgba(0, 242, 254, 0.12); color: var(--accent-cyan); }
.dabs-icon { background: rgba(255, 122, 0, 0.12); color: var(--accent-flame); }
.bt-icon { background: rgba(157, 78, 221, 0.12); color: var(--accent-purple); }
.fw-icon { background: rgba(16, 185, 129, 0.12); color: var(--accent-green); }

.metric-data { display: flex; flex-direction: column; }
.metric-label { font-size: 0.68rem; font-weight: 700; color: var(--text-muted); letter-spacing: 0.06em; }
.metric-value { font-size: 1rem; font-weight: 700; color: #fff; }
.text-mono { font-family: var(--font-mono); font-size: 0.825rem; }

/* Device Controls Row */
.device-controls-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

@media (max-width: 600px) {
  .device-controls-row { grid-template-columns: 1fr; }
}

.control-toggle-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.control-info { display: flex; flex-direction: column; gap: 2px; }
.control-title { font-size: 0.88rem; font-weight: 700; color: #fff; }
.control-desc { font-size: 0.7rem; color: var(--text-muted); max-width: 200px; }

/* Switch */
.switch {
  position: relative;
  display: inline-block;
  width: 44px; height: 24px;
  flex-shrink: 0;
}

.switch input { opacity: 0; width: 0; height: 0; }

.slider {
  position: absolute;
  cursor: pointer;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(255, 255, 255, 0.15);
  transition: .3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 34px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px; width: 18px;
  left: 3px; bottom: 3px;
  background-color: white;
  transition: .3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 50%;
}

input:checked + .slider { background-color: var(--accent-amber); }
input:checked + .slider-purple { background-color: var(--accent-purple); }
input:checked + .slider:before { transform: translateX(20px); }

.power-buttons-row {
  display: flex;
  gap: 12px;
}

.power-buttons-row .btn { flex: 1; }

/* ==========================================================================
   Tab 2: Custom Heat Curve Studio
   ========================================================================== */
.curve-studio-layout {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.curve-presets-bar {
  padding: 18px 22px;
  gap: 14px;
}

.presets-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.preset-actions {
  display: flex;
  gap: 8px;
}

.curve-pills-list {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.curve-pill {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 8px 16px;
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.curve-pill:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  color: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.25);
}

.curve-pill.active {
  background: linear-gradient(135deg, rgba(255, 122, 0, 0.2), rgba(255, 0, 85, 0.2));
  border-color: var(--accent-flame);
  color: #fff;
  box-shadow: 0 0 16px -2px rgba(255, 94, 0, 0.4);
}

.curve-pill-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-flame);
}

/* Curve Canvas Card */
.curve-canvas-card {
  padding: 24px;
  gap: 20px;
}

.curve-meta-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 12px;
}

.curve-heading {
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.01em;
}

.curve-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
  max-width: 650px;
}

.curve-badges {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Graph Container */
.graph-wrapper {
  display: flex;
  gap: 10px;
  width: 100%;
}

.graph-y-axis {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  padding: 10px 0;
  text-align: right;
  width: 38px;
  flex-shrink: 0;
  user-select: none;
}

.graph-container {
  flex: 1;
  height: 360px;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 0 30px rgba(0, 0, 0, 0.7);
}

.curve-svg {
  width: 100%;
  height: 100%;
  cursor: crosshair;
  display: block;
}

.graph-grid-line {
  stroke: rgba(255, 255, 255, 0.05);
  stroke-width: 1;
  stroke-dasharray: 4 4;
}

.curve-area {
  transition: d 0.15s ease-out;
  pointer-events: none;
}

.curve-stroke {
  fill: none;
  stroke-width: 3.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 10px rgba(255, 122, 0, 0.6));
  transition: d 0.15s ease-out;
  pointer-events: none;
}

.curve-actual-trail {
  fill: none;
  stroke: #00f2fe;
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  filter: drop-shadow(0 0 8px rgba(0, 242, 254, 0.7));
  pointer-events: none;
}

/* Draggable Nodes */
.curve-node {
  cursor: grab;
  transition: r 0.15s ease, stroke-width 0.15s ease;
}

.curve-node:hover {
  r: 9;
  stroke-width: 4;
  filter: drop-shadow(0 0 8px #ff7a00);
}

.curve-node.dragging {
  cursor: grabbing;
  r: 10;
  stroke-width: 5;
  fill: #fff;
}

/* Playhead Needle */
.playhead-line {
  stroke: #ff9900;
  stroke-width: 2;
  stroke-dasharray: 4 2;
  filter: drop-shadow(0 0 8px rgba(255, 153, 0, 0.8));
  pointer-events: none;
}

.playhead-dot {
  fill: #ff9900;
  stroke: #ffffff;
  stroke-width: 2.5;
  filter: drop-shadow(0 0 10px #ff9900);
  pointer-events: none;
}

.graph-hint {
  position: absolute;
  bottom: 8px;
  right: 14px;
  font-size: 0.7rem;
  color: var(--text-muted);
  pointer-events: none;
  background: rgba(0, 0, 0, 0.5);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  display: flex;
  gap: 8px;
}

.hint-bullet {
  color: var(--accent-cyan);
}

.graph-x-axis {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  padding: 4px 10px 0 48px;
  user-select: none;
}

/* Curve Command Bar */
.curve-command-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  gap: 20px;
  flex-wrap: wrap;
}

.curve-live-metrics {
  display: flex;
  gap: 24px;
}

.c-metric {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.c-label {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

.c-val {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
}

.text-amber { color: #ff9900; }
.text-cyan { color: var(--accent-cyan); }

.curve-cta-group {
  display: flex;
  gap: 12px;
}

.btn-run-curve {
  padding: 0 28px;
  height: 52px;
}

/* Keyframe Table */
.keyframe-editor-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.kf-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.kf-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kf-table-container {
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

.kf-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.825rem;
}

.kf-table th {
  padding: 10px 14px;
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.kf-table td {
  padding: 8px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  font-family: var(--font-mono);
  color: #fff;
}

.kf-input {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 4px 8px;
  font-family: var(--font-mono);
  font-size: 0.825rem;
  color: #fff;
  width: 80px;
  outline: none;
}

.kf-input:focus {
  border-color: var(--accent-cyan);
}

.btn-delete-node {
  background: transparent;
  border: none;
  color: #fca5a5;
  cursor: pointer;
  padding: 4px;
  font-size: 0.9rem;
  transition: color 0.15s ease;
}

.btn-delete-node:hover {
  color: #ef4444;
}

/* Modals */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  transition: opacity 0.25s ease;
}

.modal-window {
  background: #11141e;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 480px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.modal-header {
  padding: 18px 20px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.modal-title { font-size: 1.15rem; font-weight: 700; color: #fff; }
.modal-subtitle { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }

.btn-icon {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 4px;
}
.btn-icon:hover { color: #fff; }

.modal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-height: 380px;
  overflow-y: auto;
}

.modal-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
}

/* Form Controls */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: #fff;
  outline: none;
  transition: border-color 0.2s ease;
}

.form-input:focus {
  border-color: var(--accent-flame);
}

.form-textarea {
  resize: vertical;
}

.scan-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.2);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 0.8rem;
  color: var(--accent-cyan);
}

.scanner-radar {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: radar-ping 1.5s infinite;
}

@keyframes radar-ping {
  0% { transform: scale(0.8); opacity: 1; }
  100% { transform: scale(2.2); opacity: 0; }
}

.device-list { display: flex; flex-direction: column; gap: 10px; }

.device-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.2s ease;
}

.device-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

.device-item-info { display: flex; flex-direction: column; gap: 2px; }
.device-item-name { font-size: 0.95rem; font-weight: 700; color: #fff; }
.device-item-addr { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); }
.device-item-rssi { font-family: var(--font-mono); font-size: 0.75rem; color: var(--accent-cyan); }

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: #181c28;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 10px;
  pointer-events: auto;
  animation: toast-in 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.toast-success { border-color: rgba(16, 185, 129, 0.5); }
.toast.toast-error { border-color: rgba(239, 68, 68, 0.5); }
.toast.toast-info { border-color: rgba(0, 242, 254, 0.5); }

@keyframes toast-in {
  from { opacity: 0; transform: translateY(12px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Footer */
.app-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.ws-pill {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.ws-connected {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.ws-disconnected {
  background: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.hidden { display: none !important; }

/* ==========================================================================
   Mobile-First Optimizations, Safe Area Insets & Compatibility Banner
   ========================================================================== */

/* Safe Area Insets for Mobile / iOS PWA */
:root {
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

body {
  padding-top: var(--safe-top);
  padding-bottom: var(--safe-bottom);
  padding-left: var(--safe-left);
  padding-right: var(--safe-right);
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  -webkit-user-select: none;
}

/* Allow text selection in inputs and tables */
input, textarea, table {
  user-select: text;
  -webkit-user-select: text;
}

/* Browser Compatibility Notice Banner */
.compat-banner {
  background: linear-gradient(135deg, rgba(255, 122, 0, 0.15), rgba(121, 40, 202, 0.15));
  border-bottom: 1px solid rgba(255, 122, 0, 0.3);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.82rem;
  color: #f1f5f9;
  z-index: 1000;
  position: relative;
}

.compat-banner-content {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
}

.compat-banner-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
}

.compat-banner-text {
  line-height: 1.4;
}

.compat-banner-text strong {
  color: var(--accent-flame);
}

.compat-banner-text a {
  color: var(--accent-cyan);
  text-decoration: underline;
  font-weight: 600;
}

.compat-banner-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.compat-btn-guide {
  background: rgba(0, 242, 254, 0.15);
  border: 1px solid rgba(0, 242, 254, 0.4);
  color: var(--accent-cyan);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.compat-btn-dismiss {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 6px;
  line-height: 1;
}

.compat-btn-dismiss:hover {
  color: #fff;
}

/* Touch Control on Heat Curve SVG */
.curve-svg {
  touch-action: none;
}

.curve-node {
  cursor: grab;
  touch-action: none;
  transition: r 0.15s ease;
}

.curve-node:active, .curve-node.dragging {
  cursor: grabbing;
  r: 10;
  stroke: var(--accent-cyan) !important;
}

/* Touch Friendly Mobile Adjustments (< 768px) */
@media (max-width: 768px) {
  .app-header {
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px 14px;
  }

  .brand-section {
    flex: 1;
  }

  .nav-tabs {
    order: 3;
    width: 100%;
    justify-content: stretch;
  }

  .nav-tab {
    flex: 1;
    justify-content: center;
    padding: 10px;
    font-size: 0.85rem;
  }

  .header-status-group {
    order: 2;
    flex-wrap: wrap;
    gap: 8px;
  }

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

  .hero-card {
    padding: 16px 14px;
  }

  /* Dial responsiveness on small screens */
  .gauge-container {
    max-width: 290px;
    margin: 0 auto;
  }

  .session-actions-bar {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 8px;
    margin: 16px 0;
  }

  .btn-sesh-start {
    min-height: 52px;
    font-size: 0.95rem;
  }

  .btn-sesh-boost, .btn-sesh-stop {
    min-height: 52px;
    font-size: 0.8rem;
    padding: 8px 6px;
  }

  .profiles-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .profile-card {
    padding: 12px;
  }

  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  /* ─── Curve Studio Mobile Fixes ─── */

  /* Tighten presets bar padding */
  .curve-presets-bar {
    padding: 14px 12px;
    gap: 12px;
  }

  /* Stack preset header so title & action buttons don't overlap */
  .presets-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .preset-actions {
    width: 100%;
    flex-wrap: wrap;
    gap: 6px;
  }

  .preset-actions .btn {
    flex: 1;
    min-width: 0;
    justify-content: center;
  }

  /* Let curve pills wrap cleanly */
  .curve-pills-list {
    gap: 8px;
  }

  .curve-pill {
    padding: 7px 12px;
    font-size: 0.78rem;
  }

  /* Canvas card */
  .curve-canvas-card {
    padding: 14px 10px;
    gap: 16px;
  }

  /* Curve meta header — stack badges below title */
  .curve-meta-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .curve-heading {
    font-size: 1.1rem;
  }

  .curve-desc {
    font-size: 0.8rem;
    max-width: 100%;
  }

  /* Fix graph overflow: container height must match wrapper height.
     Keep y-axis to the LEFT of the chart (row direction). */
  .graph-wrapper {
    height: 260px;
  }

  .graph-container {
    height: 100%;
    min-width: 0; /* prevent flex overflow */
  }

  .graph-y-axis {
    width: 32px;
    font-size: 0.65rem;
    flex-shrink: 0;
  }

  /* Adjust x-axis left padding to match y-axis width on mobile */
  .graph-x-axis {
    padding-left: 42px;
    font-size: 0.65rem;
  }

  /* Graph hint — keep it readable and inside bounds */
  .graph-hint {
    font-size: 0.65rem;
    right: 6px;
    bottom: 6px;
    padding: 2px 6px;
    gap: 5px;
  }

  /* Command bar — full-width stack */
  .curve-command-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    padding: 14px;
  }

  .curve-live-metrics {
    justify-content: space-around;
    gap: 16px;
    flex-wrap: wrap;
  }

  .c-val {
    font-size: 1.05rem;
  }

  .curve-cta-group {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 10px;
  }

  .btn-run-curve {
    padding: 0 16px;
    height: 48px;
    font-size: 0.85rem;
  }

  /* Keyframe table — compact for mobile */
  .kf-table th, .kf-table td {
    padding: 8px 6px;
    font-size: 0.78rem;
  }

  .kf-input {
    width: 65px;
    padding: 6px;
  }

  /* Bottom spacing so mobile navigation doesn't cut off content */
  .app-layout {
    padding-bottom: 40px;
  }
}

/* ──── Extra-Small Mobile (< 480px) ──── */
@media (max-width: 480px) {
  .app-layout {
    padding: 10px 10px 40px;
    gap: 14px;
  }

  /* Header — stack everything vertically */
  .app-header {
    padding: 10px 12px;
    gap: 10px;
  }

  .brand-title {
    font-size: 1rem;
  }

  .brand-logo {
    width: 36px;
    height: 36px;
  }

  .nav-tab {
    padding: 8px 6px;
    font-size: 0.78rem;
    gap: 4px;
  }

  .tab-badge {
    font-size: 0.58rem;
    padding: 1px 4px;
  }

  .status-pill {
    font-size: 0.75rem;
    padding: 5px 10px;
  }

  .battery-pill {
    font-size: 0.75rem;
    padding: 5px 10px;
  }

  /* Dashboard gauge */
  .gauge-container {
    max-width: 240px;
    max-height: 240px;
  }

  .live-temp-display {
    font-size: 2.6rem;
  }

  .live-temp-display .unit {
    font-size: 1.1rem;
  }

  .dial-scale-endpoints {
    top: 200px;
    width: 200px;
  }

  .session-actions-bar {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .btn-sesh-start {
    min-height: 48px;
    font-size: 0.88rem;
  }

  .btn-sesh-boost, .btn-sesh-stop {
    min-height: 44px;
    font-size: 0.78rem;
  }

  .profiles-grid {
    grid-template-columns: 1fr;
  }

  .metrics-grid {
    grid-template-columns: 1fr;
  }

  /* ─── Curve Studio — Extra Small ─── */

  .curve-presets-bar {
    padding: 12px 10px;
  }

  .preset-actions .btn {
    padding: 6px 8px;
    font-size: 0.72rem;
  }

  .curve-pill {
    padding: 6px 10px;
    font-size: 0.72rem;
  }

  .curve-canvas-card {
    padding: 12px 8px;
    gap: 12px;
  }

  .curve-heading {
    font-size: 1rem;
  }

  .curve-desc {
    font-size: 0.75rem;
  }

  /* Even smaller graph on tiny screens */
  .graph-wrapper {
    height: 200px;
  }

  .graph-container {
    height: 100%;
  }

  .graph-y-axis {
    width: 28px;
    font-size: 0.6rem;
  }

  .graph-x-axis {
    padding-left: 36px;
    font-size: 0.6rem;
  }

  /* Hide graph hint entirely on very small screens to save space */
  .graph-hint {
    display: none;
  }

  /* Command bar metrics */
  .curve-live-metrics {
    gap: 10px;
  }

  .c-label {
    font-size: 0.6rem;
  }

  .c-val {
    font-size: 0.92rem;
  }

  .curve-cta-group {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .btn-run-curve {
    padding: 0 10px;
    height: 44px;
    font-size: 0.78rem;
  }

  #run-curve-btn-label {
    font-size: 0.72rem;
  }

  /* Keyframe table — extra compact */
  .kf-table th, .kf-table td {
    padding: 6px 4px;
    font-size: 0.72rem;
  }

  .kf-input {
    width: 55px;
    padding: 5px 4px;
    font-size: 0.75rem;
  }

  .kf-header {
    flex-wrap: wrap;
    gap: 8px;
  }

  /* Compat banner — stack on tiny screens */
  .compat-banner {
    flex-direction: column;
    align-items: flex-start;
    padding: 8px 12px;
    gap: 8px;
    font-size: 0.75rem;
  }

  .compat-banner-actions {
    width: 100%;
    justify-content: flex-end;
  }

  /* Modal — full width on small screens */
  .modal-overlay {
    padding: 12px;
  }

  .modal-window {
    max-width: 100%;
  }

  .modal-body {
    max-height: 60vh;
    padding: 16px;
  }

  /* Footer — stack */
  .app-footer {
    flex-direction: column;
    gap: 6px;
    text-align: center;
    font-size: 0.72rem;
  }
}

/* ──── Landscape-aware tweaks for short viewports ──── */
@media (max-height: 500px) and (orientation: landscape) {
  .gauge-container {
    max-width: 200px;
    max-height: 200px;
  }

  .graph-container {
    height: 180px;
  }

  .curve-command-bar {
    padding: 10px 14px;
  }

  .modal-body {
    max-height: 50vh;
  }
}