/* ==========================================================================
   IoMT Patient Telehealth Monitor - Design System & Modern Aesthetics
   Obsidian Dark Mode, Medical Phosphor Oscilloscope & Glassmorphism
   ========================================================================== */

:root {
  /* Color Palette - HSL Tailored Dark Theme */
  --bg-deep: #090c10;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(24, 32, 50, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 240, 255, 0.2);

  /* Medical Accents */
  --ecg-green: #00ff88;
  --ecg-glow: rgba(0, 255, 136, 0.4);
  --cyan-accent: #00f0ff;
  --cyan-glow: rgba(0, 240, 255, 0.35);
  --amber-warning: #ffb800;
  --danger-red: #ff3366;
  --danger-glow: rgba(255, 51, 102, 0.5);

  /* Typography */
  --text-main: #f0f6fc;
  --text-sub: #8b949e;
  --text-dim: #6e7681;

  /* Fonts */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, Monaco, "Courier New", monospace;

  /* Shadows & Glassmorphism */
  --glass-blur: blur(14px);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.6), inset 0 1px 0 0 rgba(255, 255, 255, 0.05);
  --shadow-glow: 0 0 20px rgba(0, 255, 136, 0.25);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
}

/* CSS Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-deep);
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(0, 240, 255, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(0, 255, 136, 0.03) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(255, 51, 102, 0.02) 0%, transparent 60%);
  background-attachment: fixed;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Utility Monospace */
.mono {
  font-family: var(--font-mono);
}

.text-cyan { color: var(--cyan-accent); }
.text-ok { color: var(--ecg-green); }
.text-warning { color: var(--amber-warning); }
.text-danger { color: var(--danger-red); }
.text-dim { color: var(--text-dim); }

/* Top Navigation Bar */
.top-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 28px;
  background: rgba(13, 17, 23, 0.8);
  backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.brand-logo-container {
  position: relative;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-logo-img {
  width: 42px;
  height: 42px;
  object-fit: contain;
  filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.45));
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), filter 0.3s ease;
}

.brand-logo-img:hover {
  transform: scale(1.08) rotate(-2deg);
  filter: drop-shadow(0 0 14px rgba(0, 255, 136, 0.65));
}

.pulse-dot-mini {
  position: absolute;
  bottom: 1px;
  right: 1px;
  width: 10px;
  height: 10px;
  background: var(--ecg-green);
  border: 2px solid var(--bg-deep);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--ecg-green);
  animation: mini-pulse 2s infinite ease-in-out;
}

@keyframes mini-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.25); opacity: 0.7; }
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #ffffff 40%, var(--cyan-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-sub);
}

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

/* Status Badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid transparent;
  transition: all 0.3s ease;
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-badge.connected {
  background: rgba(0, 255, 136, 0.12);
  border-color: rgba(0, 255, 136, 0.3);
  color: var(--ecg-green);
}
.status-badge.connected .status-indicator {
  background: var(--ecg-green);
  box-shadow: 0 0 8px var(--ecg-green);
}

.status-badge.disconnected {
  background: rgba(255, 51, 102, 0.1);
  border-color: rgba(255, 51, 102, 0.3);
  color: var(--danger-red);
}
.status-badge.disconnected .status-indicator {
  background: var(--danger-red);
  box-shadow: 0 0 8px var(--danger-red);
}

.status-badge.demo {
  background: rgba(0, 240, 255, 0.12);
  border-color: rgba(0, 240, 255, 0.3);
  color: var(--cyan-accent);
}
.status-badge.demo .status-indicator {
  background: var(--cyan-accent);
  box-shadow: 0 0 8px var(--cyan-accent);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(0, 255, 136, 0.2));
  border-color: var(--cyan-accent);
  color: #ffffff;
}
.btn-primary:hover {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.35), rgba(0, 255, 136, 0.35));
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
}

.btn-secondary {
  border-color: rgba(0, 240, 255, 0.3);
  color: var(--cyan-accent);
}

.btn-warning {
  background: rgba(255, 184, 0, 0.12);
  border-color: rgba(255, 184, 0, 0.35);
  color: var(--amber-warning);
}
.btn-warning:hover {
  background: rgba(255, 184, 0, 0.22);
  border-color: var(--amber-warning);
  box-shadow: 0 0 15px rgba(255, 184, 0, 0.3);
}
.btn-warning.muted {
  background: rgba(255, 51, 102, 0.2);
  border-color: var(--danger-red);
  color: #ff99bb;
  animation: pulse-border 1.5s infinite alternate;
}

@keyframes pulse-border {
  0% { box-shadow: 0 0 4px rgba(255, 51, 102, 0.3); }
  100% { box-shadow: 0 0 12px rgba(255, 51, 102, 0.7); }
}

.btn-danger {
  background: var(--danger-red);
  color: white;
  border-color: transparent;
}
.btn-danger:hover {
  background: #ff1a53;
  box-shadow: 0 0 15px var(--danger-glow);
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text-sub);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-main);
}

.btn-sm {
  padding: 4px 10px;
  font-size: 0.75rem;
}

/* Alert Banner */
.alert-banner {
  background: linear-gradient(90deg, rgba(255, 51, 102, 0.95), rgba(180, 20, 60, 0.95));
  color: #ffffff;
  padding: 12px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 4px 20px rgba(255, 51, 102, 0.4);
  animation: alert-pulse 1.2s infinite alternate;
  z-index: 90;
}

.alert-banner.hidden {
  display: none;
}

@keyframes alert-pulse {
  0% { box-shadow: 0 0 15px rgba(255, 51, 102, 0.4); }
  100% { box-shadow: 0 0 35px rgba(255, 51, 102, 0.85); }
}

.alert-content {
  display: flex;
  align-items: center;
  gap: 14px;
}

.alert-icon {
  font-size: 1.8rem;
  animation: shake 0.6s infinite ease-in-out;
}

@keyframes shake {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-8deg); }
  75% { transform: rotate(8deg); }
}

/* Main Layout Grid */
.dashboard-grid {
  flex: 1;
  display: grid;
  grid-template-columns: 2.2fr 1fr;
  grid-gap: 20px;
  padding: 24px 28px;
  max-width: 1600px;
  margin: 0 auto;
  width: 100%;
}

/* Card Foundation */
.card {
  background: var(--bg-card);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
}

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

.card-icon {
  font-size: 1.25rem;
}

.card-title {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.card-sub {
  font-size: 0.72rem;
  color: var(--text-sub);
}

.header-right {
  display: flex;
  gap: 8px;
}

.tag {
  font-size: 0.7rem;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.tag-ok {
  background: rgba(0, 255, 136, 0.12);
  color: var(--ecg-green);
  border: 1px solid rgba(0, 255, 136, 0.25);
}

.tag-warning {
  background: rgba(255, 51, 102, 0.15);
  color: var(--danger-red);
  border: 1px solid rgba(255, 51, 102, 0.3);
}

.tag-dim {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-sub);
}

/* Oscilloscope Area */
.oscilloscope-wrapper {
  position: relative;
  background: #03080c;
  flex: 1;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#ecgCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Oscilloscope Grid Grid Overlay (Standard Medical Grid: 1mm & 5mm) */
.oscilloscope-grid-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  background-image: 
    linear-gradient(rgba(0, 240, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.04) 1px, transparent 1px),
    linear-gradient(rgba(0, 240, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.12) 1px, transparent 1px);
  background-size: 10px 10px, 10px 10px, 50px 50px, 50px 50px;
}

.lead-marker {
  position: absolute;
  top: 12px;
  left: 14px;
  font-size: 0.7rem;
  font-weight: 600;
  color: rgba(0, 240, 255, 0.6);
  font-family: var(--font-mono);
  pointer-events: none;
}

.sweep-marker {
  position: absolute;
  bottom: 12px;
  right: 14px;
  font-size: 0.75rem;
  color: rgba(0, 255, 136, 0.7);
  font-family: var(--font-mono);
  pointer-events: none;
}

.ecg-footer {
  display: flex;
  gap: 28px;
  padding: 12px 20px;
  background: rgba(0, 0, 0, 0.3);
  border-top: 1px solid var(--border-subtle);
}

.metric-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
}

.metric-label {
  color: var(--text-sub);
}

.metric-val {
  font-weight: 600;
}

/* Vitals Column */
.vitals-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.vital-card {
  padding: 16px 20px;
  border-left: 4px solid var(--cyan-accent);
}

.vital-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.vital-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-sub);
}

.vital-body {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-bottom: 6px;
}

.vital-number {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}

.vital-unit {
  font-size: 0.9rem;
  color: var(--text-sub);
  font-weight: 500;
}

.vital-status {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-sub);
}

.vital-range {
  font-size: 0.68rem;
  color: var(--text-dim);
  margin-top: 2px;
}

/* Pulsing Heart Animation */
.heart-pulse-icon {
  font-size: 1.3rem;
  display: inline-block;
  transform: scale(1);
  transition: transform 0.1s ease;
}

.heart-beat {
  animation: heart-thump 0.35s ease-out;
}

@keyframes heart-thump {
  0% { transform: scale(1); }
  50% { transform: scale(1.4); }
  100% { transform: scale(1); }
}

/* Gauge Level Bar for SMV */
.gauge-container {
  width: 100%;
  height: 10px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 5px;
  position: relative;
  overflow: hidden;
  margin: 10px 0 4px;
}

.gauge-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--ecg-green) 0%, var(--amber-warning) 60%, var(--danger-red) 100%);
  border-radius: 5px;
  transition: width 0.15s ease-out;
}

.gauge-threshold {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--danger-red);
  box-shadow: 0 0 6px var(--danger-red);
}

.gauge-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.68rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

/* Stats Card */
.stats-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 8px;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  padding-bottom: 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

/* Event Log Table */
.log-card {
  grid-column: 1 / -1;
}

.log-table-wrapper {
  overflow-x: auto;
  max-height: 220px;
}

.log-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
  text-align: left;
}

.log-table th {
  background: rgba(0, 0, 0, 0.4);
  color: var(--text-sub);
  font-weight: 600;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 0;
}

.log-table td {
  padding: 10px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.log-table tr:hover {
  background: rgba(255, 255, 255, 0.02);
}

.badge-alert {
  background: rgba(255, 51, 102, 0.2);
  color: var(--danger-red);
  border: 1px solid var(--danger-red);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.72rem;
}

.badge-info {
  background: rgba(0, 240, 255, 0.15);
  color: var(--cyan-accent);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.72rem;
}

/* Modal Window */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: var(--glass-blur);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 16px;
}

.modal-backdrop.hidden {
  display: none;
}

.modal-card {
  background: #111726;
  border: 1px solid rgba(0, 240, 255, 0.3);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
  width: 100%;
  max-width: 520px;
  overflow: hidden;
  animation: modal-enter 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modal-enter {
  0% { transform: scale(0.95) translateY(10px); opacity: 0; }
  100% { transform: scale(1) translateY(0); opacity: 1; }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.modal-title {
  font-size: 1.05rem;
  font-weight: 700;
}

.modal-close {
  background: transparent;
  border: none;
  font-size: 1.5rem;
  color: var(--text-sub);
  cursor: pointer;
  line-height: 1;
}

.modal-body {
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

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

.form-group input {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.form-group input:focus {
  border-color: var(--cyan-accent);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.25);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-gap: 14px;
}

.form-tip {
  font-size: 0.7rem;
  color: var(--text-dim);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 10px;
}

/* Toast Notifications (Medical HUD Floating Alerts) */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 9999;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(18, 24, 38, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--cyan-accent);
  color: var(--text-main);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  transform: translateY(20px);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast.toast-warning {
  border-left-color: var(--amber-warning);
}

.toast.toast-danger {
  border-left-color: var(--danger-red);
}

.toast.toast-success {
  border-left-color: var(--ecg-green);
}

/* Bottom Footer */
.bottom-footer {
  text-align: center;
  padding: 16px 20px;
  font-size: 0.75rem;
  color: var(--text-dim);
  border-top: 1px solid var(--border-subtle);
  background: rgba(13, 17, 23, 0.6);
}

.bottom-footer a {
  color: var(--cyan-accent);
  text-decoration: none;
}
.bottom-footer a:hover {
  text-decoration: underline;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .top-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 18px;
  }
  .nav-controls {
    flex-wrap: wrap;
    width: 100%;
  }
  .dashboard-grid {
    padding: 14px 16px;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
}