:root {
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  /* Premium Obsidian + Slate Palette */
  --bg-deep: #07090e;
  --bg-base: #0c1017;
  --bg-surface: #121824;
  --bg-elevated: #182030;
  --bg-hover: #1e293b;

  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-default: rgba(255, 255, 255, 0.10);
  --border-hover: rgba(255, 255, 255, 0.18);
  --border-focus: #3b82f6;

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

  /* Accent Colors */
  --brand: #2563eb;
  --brand-light: #3b82f6;
  --brand-glow: rgba(37, 99, 235, 0.25);

  --emerald: #10b981;
  --emerald-bg: rgba(16, 185, 129, 0.12);
  --emerald-border: rgba(16, 185, 129, 0.25);

  --amber: #f59e0b;
  --amber-bg: rgba(245, 158, 11, 0.12);
  --amber-border: rgba(245, 158, 11, 0.25);

  --rose: #f43f5e;
  --rose-bg: rgba(244, 63, 94, 0.12);
  --rose-border: rgba(244, 63, 94, 0.25);

  --cyan: #06b6d4;
  --cyan-bg: rgba(6, 182, 212, 0.12);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 24px var(--brand-glow);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  min-height: 100vh;
  background-color: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  letter-spacing: -0.01em;
  overflow-x: hidden;
}

/* Background Atmosphere */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1000px;
  height: 500px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.12) 0%, rgba(6, 182, 212, 0.04) 40%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hidden {
  display: none !important;
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

/* App Shell */
.app-container {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px 60px;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--brand), var(--cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
  color: #fff;
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.brand-text h1 {
  font-size: 16px;
  font-weight: 600;
}

.brand-text p {
  font-size: 12px;
  color: var(--text-secondary);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}
.btn-primary:hover {
  background: var(--brand-light);
  box-shadow: 0 2px 8px var(--brand-glow);
}

.btn-secondary {
  background: var(--bg-surface);
  border-color: var(--border-default);
  color: var(--text-primary);
}
.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--border-hover);
}

.btn-danger {
  background: var(--rose-bg);
  border-color: var(--rose-border);
  color: var(--rose);
}
.btn-danger:hover {
  background: rgba(244, 63, 94, 0.2);
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
  border-radius: 6px;
}

.btn-icon {
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: var(--radius-sm);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 500;
  border-radius: var(--radius-full);
  line-height: 1.2;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.badge-success {
  background: var(--emerald-bg);
  color: var(--emerald);
  border: 1px solid var(--emerald-border);
}
.badge-success .badge-dot { background: var(--emerald); }

.badge-warning {
  background: var(--amber-bg);
  color: var(--amber);
  border: 1px solid var(--amber-border);
}
.badge-warning .badge-dot { background: var(--amber); }

.badge-danger {
  background: var(--rose-bg);
  color: var(--rose);
  border: 1px solid var(--rose-border);
}
.badge-danger .badge-dot { background: var(--rose); }

.badge-neutral {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}
.badge-neutral .badge-dot { background: var(--text-tertiary); }

/* KPI Overview */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.kpi-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.kpi-title {
  font-size: 12px;
  color: var(--text-secondary);
}

.kpi-value {
  font-size: 24px;
  font-weight: 600;
  font-family: var(--font-mono);
}

/* Section Header */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  gap: 12px;
}

.section-title {
  font-size: 14px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

/* Account Pill List */
.account-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.account-pill {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 8px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.account-info {
  display: flex;
  flex-direction: column;
}

.account-phone {
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-mono);
}

.account-desc {
  font-size: 11px;
  color: var(--text-tertiary);
}

/* Device Grid */
.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.device-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: all 0.2s ease;
}

.device-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.device-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.device-title {
  font-size: 15px;
  font-weight: 600;
}

.device-subtitle {
  font-size: 12px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.device-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
  padding: 10px 12px;
  background: var(--bg-deep);
  border-radius: var(--radius-sm);
  font-size: 12px;
}

.device-stat-item {
  display: flex;
  flex-direction: column;
}

.device-stat-label {
  color: var(--text-tertiary);
  font-size: 11px;
}

.device-stat-val {
  font-family: var(--font-mono);
  color: var(--text-primary);
  font-weight: 500;
}

.device-schedule-text {
  font-size: 11px;
  color: var(--text-secondary);
  padding: 0 4px;
  min-height: 16px;
}

.device-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 6px;
  border-top: 1px solid var(--border-subtle);
}

.device-actions .btn {
  flex: 1;
}

/* Inline Settings Panel */
.settings-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-md);
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.form-group {
  margin-bottom: 14px;
}

.form-group label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group small {
  display: block;
  font-size: 11px;
  color: var(--text-tertiary);
  margin-top: 4px;
}

.input, .select {
  width: 100%;
  background: var(--bg-deep);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s;
}

.input:focus, .select:focus {
  border-color: var(--border-focus);
}

.preview-box {
  padding: 10px 14px;
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: #93c5fd;
  margin-bottom: 16px;
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.modal-card {
  width: 100%;
  max-width: 440px;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.modal-title {
  font-size: 16px;
  font-weight: 600;
}

.close-btn {
  background: transparent;
  border: none;
  color: var(--text-tertiary);
  font-size: 20px;
  cursor: pointer;
  padding: 4px;
}
.close-btn:hover { color: var(--text-primary); }

/* Captcha Stage */
.captcha-box {
  background: var(--bg-deep);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.captcha-stage {
  position: relative;
  width: 300px;
  height: 150px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: #000;
}

.captcha-bg {
  width: 300px;
  height: 150px;
  display: block;
}

.captcha-jigsaw {
  position: absolute;
  top: 0;
  left: 0;
  height: 150px;
  pointer-events: none;
}

.captcha-track {
  position: relative;
  width: 300px;
  height: 40px;
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  touch-action: none;
}

.captcha-fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: var(--brand-glow);
  border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

.captcha-handle {
  position: absolute;
  left: 0;
  top: 0;
  width: 44px;
  height: 38px;
  background: var(--brand);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  cursor: grab;
  font-weight: bold;
  z-index: 2;
}

/* Fullscreen Responsive Remote Viewer */
.viewer-modal {
  position: fixed;
  inset: 0;
  background: #000;
  z-index: 200;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.viewer-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 48px;
  background: rgba(12, 16, 23, 0.75);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 10;
  transition: opacity 0.2s ease;
}

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

.viewer-phone-name {
  font-size: 13px;
  font-weight: 600;
}

.viewer-body {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  background: #000;
  overflow: hidden;
}

.viewer-player-wrap {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.viewer-player-wrap video {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  touch-action: none;
}

.viewer-overlay-status {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 13px;
  z-index: 5;
}

/* Floating Navigation Bar (Mobile & Desktop) */
.viewer-nav {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(18, 24, 36, 0.85);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  box-shadow: var(--shadow-lg);
  z-index: 10;
}

.viewer-nav-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 13px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}
.viewer-nav-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

/* Toast */
.toast-box {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  font-size: 13px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
  animation: slideUp 0.2s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive Overrides */
@media (max-width: 640px) {
  .app-container { padding: 0 14px 40px; }
  .header { padding: 14px 0; }
  .device-grid { grid-template-columns: 1fr; }
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .viewer-nav { bottom: 10px; width: 90%; justify-content: space-around; }
}

/* list14: verified live workspace structure */
html,body{background:#f5f7fb;color:#263349}.app-container{max-width:1120px;padding:0 14px 24px}body::before{display:none}.header{padding:14px 0;margin-bottom:12px}.brand-icon{width:30px;height:30px;font-size:14px}.brand-text h1{font-size:15px}.brand-text p{font-size:10px}.header-actions{gap:6px}.header-actions .btn{min-height:30px;padding:5px 9px;font-size:11px}.kpi-grid{display:flex;gap:0;background:#fff;border:1px solid #e3e8f0;border-radius:8px;margin-bottom:18px}.kpi-card{flex:1;padding:10px 14px;display:flex;flex-direction:row;justify-content:space-between;align-items:center;border:0;border-radius:0;box-shadow:none;background:transparent}.kpi-card+.kpi-card{border-left:1px solid #edf0f5}.kpi-title{font-size:11px;color:#7c889c}.kpi-value{font-size:20px;color:#25334b;margin:0}.section-header{margin:16px 0 8px}.section-title{font-size:12px;color:#58677d;letter-spacing:0}.account-pill{background:#fff;border:1px solid #e3e8f0;border-radius:8px;padding:9px 12px;box-shadow:none}.account-phone{font-size:12px}.account-desc{font-size:10px}.device-grid{display:flex;flex-direction:column;gap:0;background:#fff;border:1px solid #e3e8f0;border-radius:9px;overflow:hidden;margin-bottom:18px}.device-card{display:grid;grid-template-columns:minmax(180px,1fr) 160px 280px;gap:5px 20px;align-items:center;padding:12px 14px;border:0;border-radius:0;box-shadow:none;background:transparent}.device-card+.device-card{border-top:1px solid #edf0f5}.device-card:hover{box-shadow:none;transform:none;background:#fafcff}.device-top{grid-column:1;grid-row:1;align-items:center}.device-title{font-size:13px;color:#24344c}.device-subtitle{font-size:10px;color:#8894a8}.device-stats{grid-column:2;grid-row:1 / span 2;background:transparent;padding:0;gap:10px}.device-stat-label{font-size:10px;color:#8894a8}.device-stat-val{font-size:12px;color:#34445c}.device-schedule-text{grid-column:1;grid-row:2;min-height:0;font-size:10px;color:#8a95a8;padding:0}.device-actions{grid-column:3;grid-row:1 / span 2;border:0;padding:0;gap:5px;display:flex}.device-actions .btn{min-height:32px;padding:5px 8px;font-size:11px;border-radius:6px}.btn-secondary{background:#fff;border-color:#dfe6f0;color:#485a72}.badge{font-size:10px;padding:3px 6px}.badge-neutral{background:#edf1f7;color:#718098;border-color:#e3e8f0}.settings-panel{background:#fff;color:#263349;border:1px solid #e3e8f0;border-radius:9px;box-shadow:none}.input,.select{background:#f8fafc;color:#263349;border-color:#dce4ef}.modal-card{background:#fff;color:#263349}.modal-title,.settings-header h3{color:#263349}
.viewer-modal{height:100dvh}.viewer-header{position:relative;flex-shrink:0;height:auto;min-height:50px}.viewer-body{height:auto;min-height:0}.viewer-nav{position:relative;bottom:auto;left:auto;transform:none;border-radius:0;justify-content:center;flex-shrink:0;width:100%;padding-bottom:calc(8px + env(safe-area-inset-bottom))}.viewer-header .btn-secondary{background:#263249;color:#fff;border-color:#36435b}
@media(max-width:700px){.app-container{padding:0 10px 22px}.header{gap:10px}.header-actions{width:100%;gap:6px}.kpi-card{flex-direction:column;gap:2px;padding:8px 4px}.kpi-title{font-size:9px;white-space:nowrap}.kpi-value{font-size:18px}.account-pill{width:100%;padding:8px 10px}.device-card{grid-template-columns:1fr;gap:5px;padding:10px 12px}.device-top{grid-column:1;grid-row:1}.device-top>div:first-child{display:flex;align-items:baseline;gap:7px;flex-wrap:wrap}.device-title{font-size:12px}.device-subtitle{font-size:10px}.device-stats{grid-column:1;grid-row:2;display:flex;gap:18px}.device-stat-item{flex-direction:row;gap:5px;align-items:baseline}.device-stat-label{font-size:9px}.device-stat-val{font-size:11px}.device-schedule-text{grid-column:1;grid-row:3;font-size:9px}.device-actions{grid-column:1;grid-row:4;display:flex;gap:6px;margin-top:3px}.device-actions .btn{min-height:32px;padding:6px;font-size:10px}.viewer-header{flex-wrap:wrap;gap:8px;padding:8px}.section-header{margin:13px 0 7px}}