:root {
  --bg-primary: #0b1120;
  --bg-card: rgba(30, 41, 59, 0.7);
  --border-color: rgba(255, 255, 255, 0.08);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --primary: #10b981;
  --primary-glow: rgba(16, 185, 129, 0.25);
  --accent-cyan: #06b6d4;
  --danger: #ef4444;
  --danger-glow: rgba(239, 68, 68, 0.25);
  --warning: #f59e0b;
  --card-radius: 16px;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  padding: 16px;
  display: flex;
  justify-content: center;
}

.dashboard-container {
  width: 100%;
  max-width: 520px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding-bottom: 32px;
}

/* Header */
.header-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 18px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.brand-icon {
  font-size: 28px;
  line-height: 1;
}

.brand-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

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

.connection-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #64748b;
}

.connection-badge.connected .status-dot {
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
  animation: pulse 2s infinite;
}

.connection-badge.disconnected .status-dot {
  background: var(--danger);
  box-shadow: 0 0 8px var(--danger);
}

/* Alert Banner */
.alert-banner {
  display: none;
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.4);
  color: #fca5a5;
  border-radius: var(--card-radius);
  padding: 14px 18px;
  font-size: 14px;
  align-items: center;
  gap: 10px;
  animation: slideDown 0.3s ease;
}

.alert-banner.visible {
  display: flex;
}

/* Main Gauge Card */
.gauge-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.gauge-wrapper {
  position: relative;
  width: 200px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 10px 0;
}

.gauge-svg {
  transform: rotate(-90deg);
  width: 100%;
  height: 100%;
}

.gauge-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.08);
  stroke-width: 14;
}

.gauge-progress {
  fill: none;
  stroke: var(--primary);
  stroke-width: 14;
  stroke-linecap: round;
  stroke-dasharray: 565;
  stroke-dashoffset: 565;
  transition: stroke-dashoffset 1s ease, stroke 0.4s ease;
}

.gauge-center {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.gauge-val {
  font-size: 44px;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: #fff;
}

.gauge-unit {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-muted);
}

.gauge-label {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-top: -4px;
}

/* Metric Pills */
.metrics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  width: 100%;
  margin-top: 16px;
}

.metric-pill {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: left;
}

.metric-pill-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.metric-pill-value {
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Control Buttons */
.controls-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card-heading {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.button-row {
  display: flex;
  gap: 10px;
}

.btn {
  flex: 1;
  padding: 14px 18px;
  border-radius: 12px;
  border: none;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition);
}

.btn-water {
  background: linear-gradient(135deg, #10b981, #059669);
  color: #fff;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-water:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-stop {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #f87171;
}

.btn-stop:hover:not(:disabled) {
  background: rgba(239, 68, 68, 0.25);
}

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

/* AI Intelligence Card */
.ai-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.ai-decision-tag {
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.ai-decision-tag.WATER {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.ai-decision-tag.SKIP {
  background: rgba(148, 163, 184, 0.2);
  color: #cbd5e1;
  border: 1px solid rgba(148, 163, 184, 0.4);
}

.ai-reasoning-box {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 12px;
  font-size: 13px;
  line-height: 1.5;
  color: #e2e8f0;
}

/* Chart Card */
.chart-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--card-radius);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.chart-wrapper {
  position: relative;
  width: 100%;
  height: 180px;
}

/* Animations */
@keyframes pulse {
  0% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.1); }
  100% { opacity: 1; transform: scale(1); }
}

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

/* ==========================================================================
   Chatbot Floating Action Button & Drawer
   ========================================================================== */

.chat-floating-btn {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 12px 20px;
  border-radius: 30px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.35);
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s ease;
  user-select: none;
}

.chat-floating-btn:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 12px 30px rgba(16, 185, 129, 0.5);
}

.chat-floating-btn:active {
  transform: translateY(1px) scale(0.98);
}

.chat-btn-icon {
  font-size: 18px;
  line-height: 1;
}

.chat-btn-pulse {
  position: absolute;
  top: -2px;
  right: -2px;
  width: 12px;
  height: 12px;
  background: #34d399;
  border-radius: 50%;
  box-shadow: 0 0 10px #34d399;
  animation: pulse 1.8s infinite;
}

/* Chat Drawer Backdrop */
.chat-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(11, 17, 32, 0.65);
  backdrop-filter: blur(4px);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.chat-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

/* Chat Drawer */
.chat-drawer {
  position: fixed;
  bottom: 0;
  right: 0;
  left: 0;
  max-height: 88vh;
  height: 640px;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 24px 24px 0 0;
  z-index: 1001;
  display: flex;
  flex-direction: column;
  box-shadow: 0 -12px 40px rgba(0, 0, 0, 0.6);
  transform: translateY(105%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

@media (min-width: 640px) {
  .chat-drawer {
    left: auto;
    right: 24px;
    bottom: 24px;
    width: 440px;
    height: 620px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    transform: translateY(40px) scale(0.95);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
  }

  .chat-drawer.open {
    transform: translateY(0) scale(1);
    opacity: 1;
    pointer-events: auto;
  }
}

.chat-drawer.open {
  transform: translateY(0);
}

/* Header */
.chat-drawer-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.chat-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.chat-avatar {
  width: 40px;
  height: 40px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.chat-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.chat-status {
  font-size: 11px;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 2px;
}

.chat-status-dot {
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--primary);
  animation: pulse 2s infinite;
}

.chat-close-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.chat-close-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

/* Messages Area */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar {
  width: 6px;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 3px;
}

/* Chat Message Bubbles */
.chat-msg {
  display: flex;
  flex-direction: column;
  max-width: 86%;
  animation: slideDown 0.25s ease-out;
}

.chat-msg.user {
  align-self: flex-end;
  align-items: flex-end;
}

.chat-msg.assistant {
  align-self: flex-start;
  align-items: flex-start;
}

.chat-bubble {
  padding: 12px 16px;
  border-radius: 16px;
  font-size: 13.5px;
  line-height: 1.55;
  word-break: break-word;
}

.chat-msg.user .chat-bubble {
  background: linear-gradient(135deg, #059669 0%, #0d9488 100%);
  color: #ffffff;
  border-bottom-right-radius: 4px;
  box-shadow: 0 4px 14px rgba(5, 150, 105, 0.3);
}

.chat-msg.assistant .chat-bubble {
  background: rgba(30, 41, 59, 0.85);
  border: 1px solid var(--border-color);
  color: #f1f5f9;
  border-bottom-left-radius: 4px;
}

.chat-bubble strong {
  color: #38bdf8;
  font-weight: 600;
}

.chat-bubble code {
  background: rgba(0, 0, 0, 0.3);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 12px;
  color: #34d399;
}

.chat-bubble p {
  margin-bottom: 6px;
}

.chat-bubble p:last-child {
  margin-bottom: 0;
}

.chat-bubble ul {
  padding-left: 18px;
  margin: 6px 0;
}

.chat-bubble li {
  margin-bottom: 4px;
}

.chat-time {
  font-size: 10px;
  color: #64748b;
  margin-top: 4px;
  padding: 0 4px;
}

/* Typing Indicator */
.chat-typing {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 12px 18px;
  background: rgba(30, 41, 59, 0.85);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  border-bottom-left-radius: 4px;
  width: fit-content;
  animation: slideDown 0.2s ease;
}

.typing-dot {
  width: 7px;
  height: 7px;
  background: #34d399;
  border-radius: 50%;
  animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }
.typing-dot:nth-child(3) { animation-delay: 0s; }

@keyframes typingBounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1.1); opacity: 1; }
}

/* Quick Prompt Chips */
.chat-chips-scroll {
  display: flex;
  gap: 8px;
  padding: 10px 18px;
  overflow-x: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(15, 23, 42, 0.7);
  scrollbar-width: none;
}

.chat-chips-scroll::-webkit-scrollbar {
  display: none;
}

.chat-chip {
  flex-shrink: 0;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: #cbd5e1;
  padding: 6px 12px;
  border-radius: 18px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
}

.chat-chip:hover {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.4);
  color: #ffffff;
  transform: translateY(-1px);
}

.chat-chip:active {
  transform: scale(0.96);
}

/* Input Form */
.chat-form {
  padding: 12px 18px 16px;
  display: flex;
  gap: 10px;
  align-items: center;
  background: rgba(15, 23, 42, 0.95);
  border-top: 1px solid var(--border-color);
}

.chat-input {
  flex: 1;
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid var(--border-color);
  color: #ffffff;
  font-size: 13.5px;
  padding: 10px 14px;
  border-radius: 12px;
  outline: none;
  transition: var(--transition);
}

.chat-input:focus {
  border-color: var(--primary);
  background: rgba(30, 41, 59, 1);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.chat-input::placeholder {
  color: #64748b;
}

.chat-send-btn {
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
  color: #ffffff;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.chat-send-btn:hover:not(:disabled) {
  transform: translateY(-1px) scale(1.04);
}

.chat-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}