:root {
  --primary: #ef4444; /* Heart Red */
  --primary-light: #f87171;
  --primary-dark: #b91c1c;
  --secondary: #fb7185; /* Soft Rose */
  --bg: #0f172a; 
  --surface: rgba(30, 41, 59, 0.7);
  --surface-border: rgba(255, 255, 255, 0.1);
  --text: #f8fafc;
  --text-dim: #94a3b8;
  --error: #f43f5e;
  --success: #22c55e; /* Green for online status */
  --offline: #64748b;
  --radius: 1rem;
  --radius-squircle: 22%; /* Approx squircle */
  --glass: blur(12px);
}

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

i.ph {
  vertical-align: middle;
  transform: translateY(-2px);
  margin-right: 0.25rem;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg);
  background-image: radial-gradient(circle at 0% 0%, rgba(239, 68, 68, 0.05) 0%, transparent 50%),
                    radial-gradient(circle at 100% 100%, rgba(251, 113, 133, 0.05) 0%, transparent 50%);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
}

h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  background: linear-gradient(to right, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  border-radius: 0.75rem;
  font-weight: 600;
  font-size: 0.875rem;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px 0 rgba(239, 68, 68, 0.2);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(239, 68, 68, 0.3);
  background: var(--primary-light);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--surface-border);
  backdrop-filter: var(--glass);
}

.btn-secondary:hover {
  background: rgba(51, 65, 85, 0.8);
}

.card {
  background: var(--surface);
  backdrop-filter: var(--glass);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Machine API Key Section (Fixing Bleed) */
.apikey-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  margin-top: 2.5rem;
  border: 1px dashed var(--primary);
}

.apikey-wrapper {
  flex: 1;
  min-width: 0; /* Critical for wrapping */
}

.apikey-text {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9375rem;
  color: var(--primary-light);
  background: rgba(239, 68, 68, 0.1);
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  filter: blur(5px);
  transition: filter 0.3s ease;
  cursor: pointer;
  word-break: break-all;
  display: inline-block;
  max-width: 100%;
}

.apikey-text:active, .apikey-text:hover {
  filter: blur(0);
}

/* Machine Grid */
.machine-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.machine-card {
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
}

.machine-card:hover {
  transform: translateY(-4px);
  border-color: rgba(239, 68, 68, 0.4);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  position: relative;
}

.status-online .status-dot {
  background: var(--success);
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.2);
}

.status-online .status-dot::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: inherit;
  border-radius: inherit;
  animation: pulse 2s infinite;
  z-index: -1;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(3); opacity: 0; }
}

/* Vital Progress Bars */
.vital-row {
  margin-top: 1.5rem;
}

.vital-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.vital-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-dim);
}

.vital-value {
  font-size: 0.9375rem;
  font-weight: 700;
}

.progress-轨道 {
  height: 8px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background: linear-gradient(to right, var(--primary), var(--primary-light));
  transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Modal Styling */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 23, 0.8);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal {
  background: #1e293b;
  border: 1px solid var(--surface-border);
  border-radius: 1.5rem;
  padding: 2.5rem;
  width: 100%;
  max-width: 450px;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

input {
  width: 100%;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--surface-border);
  color: #fff;
  padding: 0.875rem 1rem;
  border-radius: 0.75rem;
  font-size: 1rem;
  margin-top: 0.5rem;
  transition: border-color 0.2s;
}

input:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(15, 23, 42, 0.8);
}

/* Charts & Details */
.chart-container {
  height: 300px;
  margin: 2rem 0;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.stat-card {
  text-align: center;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

/* Responsive Table */
.table-wrapper {
  overflow-x: auto;
  margin-top: 1.5rem;
}

table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0 0.5rem;
}

th {
  text-align: left;
  padding: 1rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-dim);
}

td {
  padding: 1rem;
  background: rgba(255, 255, 255, 0.02);
  border-top: 1px solid var(--surface-border);
  border-bottom: 1px solid var(--surface-border);
}

td:first-child { border-left: 1px solid var(--surface-border); border-radius: 0.75rem 0 0 0.75rem; }
td:last-child { border-right: 1px solid var(--surface-border); border-radius: 0 0.75rem 0.75rem 0; }

/* Mobile Adaptations */
@media (max-width: 768px) {
  .apikey-container {
    align-items: flex-start;
    text-align: left;
    padding: 1.5rem;
  }
  
  .stat-grid {
    grid-template-columns: 1fr 1fr; /* Force 2 columns on tablet/large phone */
    gap: 1rem;
  }
  
  h1 { font-size: 1.75rem; }
}

@media (max-width: 480px) {
  /* Keep 2 columns for general stats, but maybe 1 for very tight spaces if needed. 
     The user's screenshot suggests 4 cols is breaking. 2 cols should fit "Nodes Online" etc. */
  
  header {
    flex-direction: row; /* Keep row but wrap if needed, or adjust size */
    flex-wrap: wrap;
  }
  
  /* Fix for System Overview Header wrapping */
  .card h2 {
    font-size: 1rem;
  }
}

/* Machine Detail Mobile Grid Fix */
@media (max-width: 900px) {
  .details-main-grid {
    grid-template-columns: 1fr !important;
  }
}

.logo-squircle {
  border-radius: var(--radius-squircle);
  aspect-ratio: 1 / 1;
  object-fit: cover;
}