/* ==========================================================================
   Smart Water Usage Advisor — Light Modern Eco Theme
   ========================================================================== */

:root {
  --bg-gradient: linear-gradient(135deg, #f0fdfa 0%, #e6f4f1 50%, #f4fnf9 100%);
  --bg-main: #f3f9f8;
  
  --panel-bg: rgba(255, 255, 255, 0.92);
  --panel-glass: rgba(255, 255, 255, 0.75);
  --border-light: rgba(13, 148, 136, 0.12);
  --border-strong: rgba(13, 148, 136, 0.25);
  --shadow-sm: 0 4px 12px rgba(15, 42, 46, 0.04);
  --shadow-md: 0 8px 24px rgba(14, 124, 123, 0.08);
  --shadow-lg: 0 16px 36px rgba(10, 92, 91, 0.12);

  --text-main: #0f2a2e;
  --text-muted: #4b6360;
  --text-light: #6b827f;

  --teal-primary: #0d9488;
  --teal-dark: #0f766e;
  --teal-light: #ccfbf1;
  --emerald-accent: #10b981;
  --emerald-bg: #ecfdf5;
  --blue-accent: #2563eb;
  --blue-bg: #eff6ff;

  --amber-val: #d97706;
  --amber-bg: #fef3c7;
  --red-val: #dc2626;
  --red-bg: #fef2f2;

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

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

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-main);
  background-image: radial-gradient(at 0% 0%, rgba(204, 251, 241, 0.5) 0px, transparent 50%),
                    radial-gradient(at 100% 100%, rgba(224, 242, 254, 0.5) 0px, transparent 50%);
  color: var(--text-main);
  line-height: 1.5;
  min-height: 100vh;
}

.app-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* --------------------------------------------------------------------------
   App Header & Branding
   -------------------------------------------------------------------------- */
.app-header {
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

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

.brand-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--teal-primary), var(--emerald-accent));
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(13, 148, 136, 0.35);
}

.brand-icon svg {
  width: 26px;
  height: 26px;
}

.brand-title {
  font-family: 'Outfit', sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  display: block;
  letter-spacing: -0.02em;
}

.brand-sub {
  font-size: 13.5px;
  color: var(--text-muted);
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
}

.badge-sdg {
  background: var(--emerald-bg);
  color: var(--teal-dark);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-sdg svg {
  width: 14px;
  height: 14px;
}

.badge-internship {
  background: var(--blue-bg);
  color: var(--blue-accent);
  border: 1px solid rgba(37, 99, 235, 0.15);
}

/* Preset Scenarios Bar */
.preset-bar {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.preset-label {
  font-size: 12.5px;
  font-weight: 700;
  color: var(--teal-dark);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

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

.btn-preset {
  appearance: none;
  border: 1px solid var(--border-light);
  background: #ffffff;
  border-radius: var(--radius-full);
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-preset:hover {
  border-color: var(--teal-primary);
  color: var(--teal-dark);
  background: var(--teal-light);
  transform: translateY(-1px);
}

/* --------------------------------------------------------------------------
   Navigation Tabs
   -------------------------------------------------------------------------- */
.nav-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 24px;
  background: var(--panel-glass);
  padding: 6px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  border: none;
  background: transparent;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.tab-btn svg {
  width: 18px;
  height: 18px;
}

.tab-btn:hover:not(.active) {
  color: var(--teal-dark);
  background: rgba(255, 255, 255, 0.6);
}

.tab-btn.active {
  background: #ffffff;
  color: var(--teal-dark);
  box-shadow: 0 2px 8px rgba(15, 42, 46, 0.08);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   Panels & Cards
   -------------------------------------------------------------------------- */
.panel {
  display: none;
}

.panel.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.panel-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 24px;
}

@media (max-width: 860px) {
  .panel-grid {
    grid-template-columns: 1fr;
  }
}

.card {
  background: var(--panel-bg);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 24px 26px;
  box-shadow: var(--shadow-sm);

}

.card-header {
  margin-bottom: 20px;
}

.card-header h3 {
  font-family: 'Outfit', sans-serif;
  font-size: 19px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.card-header p {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* --------------------------------------------------------------------------
   Quiz Form Elements
   -------------------------------------------------------------------------- */
.quiz-fields {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.quiz-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;

}

.quiz-info {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  flex: 1;
}

.quiz-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--teal-light);
  color: var(--teal-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.quiz-icon svg {
  width: 18px;
  height: 18px;
}

.quiz-info label {
  font-weight: 700;
  font-size: 14px;
  color: var(--text-main);
  display: block;
}

.quiz-desc {
  font-size: 12.5px;
  color: var(--text-muted);
  display: block;
  margin-top: 2px;
}

.yn-toggle {
  display: flex;
  background: var(--bg-main);
  padding: 3px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

.yn-toggle button {
  appearance: none;
  border: none;
  background: transparent;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.yn-toggle button.selected {
  background: var(--teal-primary);
  color: #ffffff;
  box-shadow: 0 2px 6px rgba(13, 148, 136, 0.25);
}

/* Buttons */
.btn-primary {
  width: 100%;
  padding: 14px 20px;
  border-radius: var(--radius-md);
  border: none;
  background: linear-gradient(135deg, var(--teal-primary), var(--teal-dark));
  color: #ffffff;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 14px rgba(13, 148, 136, 0.3);
  transition: all 0.2s ease;
}

.btn-primary svg {
  width: 18px;
  height: 18px;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(13, 148, 136, 0.4);
}

.btn-secondary {
  padding: 12px 20px;
  border-radius: var(--radius-md);
  border: 1.5px solid var(--teal-primary);
  background: #ffffff;
  color: var(--teal-dark);
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.btn-secondary svg {
  width: 16px;
  height: 16px;
}

.btn-secondary:hover {
  background: var(--teal-light);
}

/* --------------------------------------------------------------------------
   Gauge & Results Styling
   -------------------------------------------------------------------------- */
.result-card .card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.status-pill {
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  background: var(--emerald-bg);
  color: var(--teal-dark);
}

.status-pill.amber {
  background: var(--amber-bg);
  color: var(--amber-val);
}

.status-pill.red {
  background: var(--red-bg);
  color: var(--red-val);
}

.score-display {
  display: flex;
  align-items: center;
  gap: 20px;
  background: #ffffff;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  margin-bottom: 20px;
}

.gauge-wrapper {
  position: relative;
  width: 100px;
  height: 100px;
  flex-shrink: 0;
}

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

.gauge-bg {
  fill: none;
  stroke: var(--bg-main);
  stroke-width: 10;
}

.gauge-progress {
  fill: none;
  stroke: var(--teal-primary);
  stroke-width: 10;
  stroke-dasharray: 326.7;
  stroke-dashoffset: 326.7;
  stroke-linecap: round;
  transition: stroke-dashoffset 1s ease, stroke 0.5s ease;
}

.gauge-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.gauge-val {
  font-family: 'Outfit', sans-serif;
  font-size: 26px;
  font-weight: 800;
  color: var(--text-main);
  display: block;
  line-height: 1;
}

.gauge-max {
  font-size: 11px;
  color: var(--text-light);
  font-weight: 600;
}

.score-summary {
  flex: 1;
}

.flag-badge {
  display: inline-block;
  font-size: 15px;
  font-weight: 800;
  color: var(--teal-dark);
  margin-bottom: 10px;
}

.impact-metrics {
  display: flex;
  gap: 16px;
}

.metric-box {
  flex: 1;
}

.metric-num {
  font-family: 'Outfit', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  display: block;
}

.metric-lbl {
  font-size: 11.5px;
  color: var(--text-muted);
}

/* Signals Section */
.signals-section {
  margin-bottom: 20px;
}

.signals-section h4 {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 10px;

}

.signals-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.signal-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 13px;
}

.signal-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.signal-card-action {
  font-size: 12px;
  color: var(--text-muted);
}

.empty-state {
  font-size: 13px;
  color: var(--text-light);
  font-style: italic;
  padding: 12px;
  text-align: center;
  background: var(--bg-main);
  border-radius: var(--radius-sm);
}

/* AI Box */
.ai-box {
  background: linear-gradient(135deg, #ffffff 0%, #f7fdfc 100%);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  box-shadow: 0 4px 12px rgba(13, 148, 136, 0.05);
}

.ai-box-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--teal-dark);
  margin-bottom: 10px;
}

.ai-box-header svg {
  width: 16px;
  height: 16px;
  color: var(--teal-primary);
}

.ai-content {
  font-size: 13.5px;
  color: var(--text-main);
  line-height: 1.6;
  white-space: pre-wrap;
}

.loading-spinner {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
  padding: 10px 0;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid var(--teal-light);
  border-top-color: var(--teal-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* --------------------------------------------------------------------------
   Habit Advisor Form & Controls
   -------------------------------------------------------------------------- */
.form-fields {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 24px;
}

.field-group label {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
  display: block;
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.slider-val {
  font-size: 13px;
  font-weight: 700;
  color: var(--teal-dark);
}

/* Number Stepper */
.number-stepper {
  display: inline-flex;
  align-items: center;
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.btn-step {
  appearance: none;
  border: none;
  background: var(--bg-main);
  width: 32px;
  height: 32px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--teal-dark);
  cursor: pointer;
}

.number-stepper input {
  width: 44px;
  border: none;
  text-align: center;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  background: transparent;
}

.step-unit {
  font-size: 13px;
  color: var(--text-muted);
  padding-right: 12px;
  font-weight: 600;
}

/* Custom Range Slider */
.custom-slider {
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--border-light);
  outline: none;
}

.custom-slider::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--teal-primary);
  border: 2px solid #ffffff;
  box-shadow: 0 2px 6px rgba(13, 148, 136, 0.4);
  cursor: pointer;
  transition: transform 0.1s ease;
}

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

.custom-select, .custom-input {
  width: 100%;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  background: #ffffff;
  font-family: inherit;
  font-size: 13.5px;
  color: var(--text-main);
}

.row2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

/* --------------------------------------------------------------------------
   Habit Footprint Results & Distribution Chart
   -------------------------------------------------------------------------- */
.footprint-stats {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}

.stat-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 14px;
  text-align: center;
}

.stat-card.primary {
  border-color: var(--teal-primary);
  background: var(--teal-light);
}

.stat-card.highlight {
  border-color: var(--emerald-accent);
  background: var(--emerald-bg);
}

.stat-val {
  font-family: 'Outfit', sans-serif;
  font-size: 20px;
  font-weight: 800;
  color: var(--text-main);
  display: block;
}

.stat-lbl {
  font-size: 11.5px;
  color: var(--text-muted);
}

.chart-section {
  margin-bottom: 20px;
}

.chart-section h4 {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
}

.distribution-stacked-bar {
  height: 12px;
  border-radius: var(--radius-full);
  background: var(--bg-main);
  display: flex;
  overflow: hidden;
  margin-bottom: 14px;
}

.bar-segment {
  height: 100%;
  transition: width 0.6s ease;
}

.bar-segment.shower { background: var(--teal-primary); }
.bar-segment.faucet { background: var(--blue-accent); }
.bar-segment.flower { background: var(--emerald-accent); }
.bar-segment.washing_machine { background: var(--amber-val); }

.breakdown-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.breakdown-item {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.breakdown-item-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-main);
}

.breakdown-item-sub {
  font-size: 11.5px;
  color: var(--text-muted);
}

.breakdown-item-val {
  font-family: 'Outfit', sans-serif;
  font-size: 15px;
  font-weight: 700;
  color: var(--teal-dark);
}

.assumptions-box {
  background: #ffffff;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-size: 12.5px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.assumptions-title {
  font-weight: 700;
  color: var(--text-main);
  display: block;
  margin-bottom: 4px;
}

/* --------------------------------------------------------------------------
   Savings & Planner Panel
   -------------------------------------------------------------------------- */
.planner-card {
  max-width: 800px;
  margin: 0 auto;
}

.sdg-comparison-box {
  display: flex;
  align-items: center;
  justify-content: space-around;
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 24px;
  text-align: center;
}

.sdg-val {
  font-family: 'Outfit', sans-serif;
  font-size: 24px;
  font-weight: 800;
  color: var(--teal-dark);
  display: block;
}

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

.sdg-vs {
  font-size: 14px;
  font-weight: 800;
  color: var(--text-light);
}

.simulator-box {
  background: var(--bg-main);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 24px;
}

.simulator-box h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
}

.simulator-box p {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.sim-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}

.sim-results {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
}

.sim-card {
  background: #ffffff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 14px;
  text-align: center;
}

.sim-num {
  font-family: 'Outfit', sans-serif;
  font-size: 19px;
  font-weight: 800;
  color: var(--emerald-accent);
  display: block;
}

.sim-lbl {
  font-size: 11.5px;
  color: var(--text-muted);
}

.report-actions {
  text-align: center;
  padding-top: 10px;
}

/* --------------------------------------------------------------------------
   App Footer
   -------------------------------------------------------------------------- */
.app-footer {
  margin-top: 40px;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  border-top: 1px solid var(--border-light);
  padding-top: 20px;
}

.foot-sub {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 4px;
}

/* --------------------------------------------------------------------------
   Print Styles
   -------------------------------------------------------------------------- */
@media print {
  body { background: #ffffff; color: #000; }
  .app-header, .nav-tabs, .preset-bar, .btn-primary, .btn-secondary { display: none !important; }
  .panel { display: block !important; opacity: 1 !important; }
  .card { border: 1px solid #ccc; box-shadow: none; }
}