:root {
  --bg: #060a08;
  --bg-panel: rgba(8, 16, 12, 0.88);
  --bg-panel-solid: #0c1610;
  --glass: rgba(255,255,255,0.04);
  --glass-bright: rgba(255,255,255,0.07);
  --glass-border: rgba(255,255,255,0.09);
  --glass-border-bright: rgba(255,255,255,0.14);
  --green: #30d978;
  --green-dim: #1fa855;
  --green-glow: rgba(48,217,120,0.3);
  --green-glow-soft: rgba(48,217,120,0.12);
  --gold: #f5c842;
  --gold-glow: rgba(245,200,66,0.2);
  --cyan: #52e0d6;
  --cyan-glow: rgba(82,224,214,0.2);
  --blue: #3da1e8;
  --blue-glow: rgba(61,161,232,0.2);
  --red: #ef5350;
  --red-glow: rgba(239,83,80,0.3);
  --orange: #ffa726;
  --white: #f2f2f2;
  --white-bright: #ffffff;
  --text: rgba(242,242,242,0.6);
  --text-dim: rgba(242,242,242,0.32);
  --text-muted: rgba(242,242,242,0.18);
  --border: rgba(255,255,255,0.07);
  --border-bright: rgba(255,255,255,0.12);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow: 0 8px 32px rgba(0,0,0,0.5);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.6);
  --shadow-glow-green: 0 0 40px rgba(48,217,120,0.08);
  --shadow-glow-red: 0 0 40px rgba(239,83,80,0.08);
  --radius: 14px;
  --radius-sm: 10px;
  --radius-xs: 7px;
  --ease: 0.25s cubic-bezier(0.4,0,0.2,1);
  --ease-out: 0.35s cubic-bezier(0,0,0.2,1);
  --spring: 0.4s cubic-bezier(0.34,1.56,0.64,1);
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--white);
  overflow-x: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv01', 'cv02', 'cv03', 'cv04';
}

.hidden { display: none !important }

/* ═══════════════════════════════════════════
   LOADING
   ═══════════════════════════════════════════ */
#loading-screen {
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg);
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.6s ease;
}
#loading-screen.fade-out { opacity: 0; pointer-events: none }

.loader-content { text-align: center }

.loader-ring {
  width: 48px; height: 48px; margin: 0 auto 20px;
  border: 2.5px solid var(--border);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg) } }

.loader-brand {
  font-size: 1.8rem; font-weight: 800; letter-spacing: 0.35em;
  background: linear-gradient(135deg, var(--white), var(--green));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
}
.loader-sub {
  font-size: 0.78rem; color: var(--text-dim);
  margin-bottom: 20px; letter-spacing: 0.06em;
}
.loader-bar {
  width: 160px; height: 2px; background: var(--border);
  border-radius: 1px; margin: 0 auto; overflow: hidden;
}
.loader-bar-fill {
  width: 0; height: 100%;
  background: linear-gradient(90deg, var(--green-dim), var(--green));
  border-radius: 1px; animation: loadBar 1.8s ease-out forwards;
}
@keyframes loadBar { to { width: 100% } }

/* ═══════════════════════════════════════════
   NAV
   ═══════════════════════════════════════════ */
#main-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; height: 48px;
  background: rgba(6,10,8,0.82);
  backdrop-filter: blur(32px) saturate(1.4);
  -webkit-backdrop-filter: blur(32px) saturate(1.4);
  border-bottom: 1px solid var(--border);
}

.nav-left { display: flex; align-items: center; gap: 10px }
.nav-brand {
  font-size: 0.92rem; font-weight: 800; letter-spacing: 0.28em;
  background: linear-gradient(135deg, var(--white) 40%, var(--green) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-tag {
  font-size: 0.5rem; letter-spacing: 0.12em; font-weight: 600;
  padding: 2px 8px; border-radius: 4px;
  background: rgba(48,217,120,0.08);
  color: var(--green);
  border: 1px solid rgba(48,217,120,0.15);
}

.nav-center { display: flex; gap: 2px }
.nav-link {
  background: none; border: 1px solid transparent;
  color: var(--text-dim); font-family: inherit;
  font-size: 0.72rem; font-weight: 500;
  padding: 6px 14px; border-radius: var(--radius-xs);
  cursor: pointer; transition: var(--ease); letter-spacing: 0.03em;
}
.nav-link:hover { color: var(--white); background: var(--glass) }
.nav-link.active {
  color: var(--white);
  background: rgba(48,217,120,0.08);
  border-color: rgba(48,217,120,0.12);
}

.nav-right { display: flex; align-items: center; gap: 16px }
.nav-status {
  display: flex; align-items: center; gap: 5px;
  font-size: 0.7rem; color: var(--text-dim);
}
.status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  animation: pulse 2.5s ease-in-out infinite;
}
.status-dot.green {
  background: var(--green);
  box-shadow: 0 0 8px var(--green-glow), 0 0 2px var(--green);
}
.status-dot.red {
  background: var(--red);
  box-shadow: 0 0 8px var(--red-glow), 0 0 2px var(--red);
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.35} }

.nav-time {
  font-size: 0.82rem; font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
  text-shadow: 0 0 12px var(--cyan-glow);
}

/* ═══════════════════════════════════════════
   SECTIONS
   ═══════════════════════════════════════════ */
.section { display: none; min-height: 100vh; padding-top: 48px }
.section.active { display: block; animation: sectionIn 0.3s ease }
@keyframes sectionIn { from{opacity:0;transform:translateY(4px)} to{opacity:1;transform:none} }

/* ═══════════════════════════════════════════
   LANDSCAPE
   ═══════════════════════════════════════════ */
#section-landscape {
  position: relative; height: 100vh; overflow: hidden;
  background: var(--bg); padding-top: 0;
}
#landscape-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%; display: block;
}

/* ═══════════════════════════════════════════
   HERO OVERLAY
   ═══════════════════════════════════════════ */
#hero-overlay {
  position: absolute; inset: 0; z-index: 10;
  display: flex; align-items: flex-start; justify-content: space-between;
  padding: 68px 32px 32px; pointer-events: none;
}
#hero-overlay > * { pointer-events: auto }

.hero-left { max-width: 440px }

.hero-title {
  font-size: 2.6rem; font-weight: 900; letter-spacing: 0.1em;
  line-height: 1;
  background: linear-gradient(135deg, var(--white-bright) 20%, var(--green) 120%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
  filter: drop-shadow(0 2px 8px rgba(48,217,120,0.15));
}
.hero-subtitle {
  font-size: 0.88rem; font-weight: 400; color: var(--text);
  margin-bottom: 2px;
}
.hero-desc {
  font-size: 0.75rem; color: var(--text-dim);
  margin-bottom: 22px; line-height: 1.5;
}

.hero-metrics { display: flex; gap: 16px; margin-bottom: 22px }
.hero-metric { flex: 1 }
.metric-label {
  font-size: 0.56rem; font-weight: 700; letter-spacing: 0.14em;
  color: var(--text-dim); margin-bottom: 3px; text-transform: uppercase;
}
.metric-value {
  font-size: 1.25rem; font-weight: 800;
  font-variant-numeric: tabular-nums;
  transition: color 0.3s, text-shadow 0.3s;
}
.metric-value.stable {
  color: var(--green);
  text-shadow: 0 0 16px var(--green-glow-soft);
}
.metric-value.warning { color: var(--orange) }
.metric-value.critical {
  color: var(--red);
  animation: critPulse 1.8s ease-in-out infinite;
}
@keyframes critPulse {
  0%,100%{ text-shadow: none }
  50%{ text-shadow: 0 0 20px var(--red-glow), 0 0 4px var(--red) }
}

.hero-actions { display: flex; gap: 8px; flex-wrap: wrap }

/* ═══════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════ */
.btn-primary {
  padding: 10px 22px; border: none; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--green-dim), var(--green));
  color: #060a08; font-family: inherit;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em;
  cursor: pointer; transition: var(--ease);
  box-shadow: 0 2px 12px var(--green-glow), inset 0 1px 0 rgba(255,255,255,0.15);
  text-transform: uppercase;
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--green-glow), inset 0 1px 0 rgba(255,255,255,0.2);
  filter: brightness(1.1);
}
.btn-primary:active { transform: translateY(0) scale(0.97) }

.btn-secondary {
  padding: 10px 22px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: var(--glass);
  color: var(--white); font-family: inherit;
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.1em;
  cursor: pointer; transition: var(--ease);
  backdrop-filter: blur(12px);
  text-transform: uppercase;
}
.btn-secondary:hover {
  background: var(--glass-bright);
  border-color: var(--glass-border-bright);
  transform: translateY(-1px);
}
.btn-secondary:active { transform: scale(0.97) }

.btn-emergency {
  padding: 10px 22px; border: none; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #c62828, var(--red));
  color: var(--white); font-family: inherit;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em;
  cursor: pointer; transition: var(--ease);
  box-shadow: 0 2px 12px var(--red-glow), inset 0 1px 0 rgba(255,255,255,0.1);
  text-transform: uppercase; position: relative; overflow: hidden;
}
.btn-emergency::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.08), transparent);
  transform: translateX(-100%);
  animation: shimmer 3s ease-in-out infinite;
}
@keyframes shimmer { 0%{transform:translateX(-100%)} 50%{transform:translateX(100%)} 100%{transform:translateX(100%)} }
.btn-emergency:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--red-glow);
}
.btn-emergency:active { transform: scale(0.97) }

.btn-recover {
  padding: 11px 26px; border: none; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--green-dim), var(--green));
  color: #060a08; font-family: inherit;
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em;
  cursor: pointer; transition: var(--ease);
  box-shadow: 0 4px 20px var(--green-glow);
  text-transform: uppercase;
}
.btn-recover:hover { filter: brightness(1.1); transform: translateY(-1px) }

/* ═══════════════════════════════════════════
   FLOW SUMMARY
   ═══════════════════════════════════════════ */
.hero-right { width: 280px }

.flow-summary {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 0;
  backdrop-filter: blur(28px) saturate(1.3);
  -webkit-backdrop-filter: blur(28px) saturate(1.3);
  box-shadow: var(--shadow), var(--shadow-glow-green);
}
.flow-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-xs);
  cursor: pointer; transition: var(--ease);
  margin: 0 4px;
}
.flow-item:hover { background: var(--glass-bright) }
.flow-item + .flow-item { border-top: 1px solid var(--border) }

.flow-icon {
  width: 30px; height: 30px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; flex-shrink: 0;
  transition: transform 0.2s ease;
}
.flow-item:hover .flow-icon { transform: scale(1.12) }
.sun-icon  { background: rgba(245,200,66,0.1); color: var(--gold); box-shadow: inset 0 0 8px rgba(245,200,66,0.06) }
.wind-icon { background: rgba(82,224,214,0.1); color: var(--cyan); box-shadow: inset 0 0 8px rgba(82,224,214,0.06) }
.hydro-icon{ background: rgba(61,161,232,0.1); color: var(--blue); box-shadow: inset 0 0 8px rgba(61,161,232,0.06) }
.batt-icon { background: rgba(48,217,120,0.1); color: var(--green); box-shadow: inset 0 0 8px rgba(48,217,120,0.06) }

.flow-info { flex: 1; min-width: 0 }
.flow-name { font-size: 0.65rem; color: var(--text-dim); margin-bottom: 1px; font-weight: 500 }
.flow-power {
  font-size: 0.92rem; font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.flow-bar {
  width: 52px; height: 3px; background: rgba(255,255,255,0.05);
  border-radius: 2px; overflow: hidden; flex-shrink: 0;
}
.flow-bar-fill {
  height: 100%; border-radius: 2px;
  transition: width 0.6s cubic-bezier(0.4,0,0.2,1);
}
.solar-fill  { background: linear-gradient(90deg, #c49a20, var(--gold)) }
.wind-fill   { background: linear-gradient(90deg, #2ba89e, var(--cyan)) }
.hydro-fill  { background: linear-gradient(90deg, #2980b9, var(--blue)) }
.batt-fill   { background: linear-gradient(90deg, var(--green-dim), var(--green)) }

/* ═══════════════════════════════════════════
   FLOATING PANEL
   ═══════════════════════════════════════════ */
.floating-panel {
  position: absolute; z-index: 20;
  background: var(--bg-panel);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: blur(32px) saturate(1.4);
  -webkit-backdrop-filter: blur(32px) saturate(1.4);
  box-shadow: var(--shadow-lg);
  min-width: 320px;
  animation: panelIn var(--spring);
}
@keyframes panelIn {
  from { opacity: 0; transform: translateY(8px) scale(0.97) }
  to { opacity: 1; transform: none }
}
.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid var(--border);
}
.panel-title {
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.12em;
  color: var(--white);
}
.panel-close {
  background: none; border: none; color: var(--text-dim);
  font-size: 1rem; cursor: pointer; padding: 2px 6px;
  transition: var(--ease); border-radius: 4px; line-height: 1;
}
.panel-close:hover { color: var(--white); background: var(--glass) }

.panel-body { padding: 14px 16px }
.decision-step { padding: 8px 0 }
.decision-step + .decision-step { border-top: 1px solid var(--border) }
.step-label {
  font-size: 0.54rem; font-weight: 700; letter-spacing: 0.16em;
  color: var(--cyan); margin-bottom: 4px;
}
.step-text { font-size: 0.75rem; color: var(--text); line-height: 1.55 }

/* ═══════════════════════════════════════════
   CONTROL PANELS
   ═══════════════════════════════════════════ */
.control-panel {
  position: absolute; z-index: 15;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(28px) saturate(1.3);
  -webkit-backdrop-filter: blur(28px) saturate(1.3);
  box-shadow: var(--shadow);
}
.panel-header-sm {
  font-size: 0.58rem; font-weight: 700; letter-spacing: 0.14em;
  color: var(--text-dim); padding: 9px 14px 6px;
  border-bottom: 1px solid var(--border);
  text-transform: uppercase;
}

#stress-panel  { bottom: 16px; left: 16px; width: 310px }
#weather-panel { bottom: 16px; left: 338px; width: 248px }
#impact-panel  { top: 64px; right: 16px; width: 248px }

.stress-buttons, .weather-buttons {
  display: flex; flex-wrap: wrap; gap: 4px; padding: 8px 12px;
}
.stress-btn, .weather-btn {
  padding: 5px 9px; border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  background: var(--glass); color: var(--text-dim);
  font-family: inherit; font-size: 0.65rem; font-weight: 500;
  cursor: pointer; transition: var(--ease);
  letter-spacing: 0.01em;
}
.stress-btn:hover, .weather-btn:hover {
  background: var(--glass-bright);
  border-color: var(--glass-border-bright);
  color: var(--white);
}
.stress-btn:active, .weather-btn:active { transform: scale(0.94) }
.stress-btn.reset {
  background: rgba(239,83,80,0.06);
  border-color: rgba(239,83,80,0.14);
  color: var(--red);
}
.stress-btn.reset:hover {
  background: rgba(239,83,80,0.12);
  border-color: rgba(239,83,80,0.25);
}
.weather-btn.active {
  background: rgba(48,217,120,0.08);
  border-color: rgba(48,217,120,0.18);
  color: var(--green);
  box-shadow: 0 0 8px rgba(48,217,120,0.06);
}

.stress-result {
  padding: 8px 12px; border-top: 1px solid var(--border);
  font-size: 0.68rem; line-height: 1.6; color: var(--text);
}
.stress-result strong { color: var(--white); font-weight: 700 }

.impact-grid { padding: 8px 12px }
.impact-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 6px 0;
}
.impact-item + .impact-item { border-top: 1px solid var(--border) }
.impact-label { font-size: 0.68rem; color: var(--text-dim); font-weight: 400 }
.impact-value {
  font-size: 0.82rem; font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.optimization-mode { padding: 8px 12px; border-top: 1px solid var(--border) }
.mode-label {
  font-size: 0.54rem; font-weight: 700; letter-spacing: 0.14em;
  color: var(--text-muted); margin-bottom: 6px; text-transform: uppercase;
}
.mode-buttons { display: flex; gap: 3px }
.mode-btn {
  flex: 1; padding: 5px 5px;
  border: 1px solid var(--border); border-radius: var(--radius-xs);
  background: var(--glass); color: var(--text-dim);
  font-family: inherit; font-size: 0.6rem; font-weight: 600;
  cursor: pointer; transition: var(--ease);
}
.mode-btn.active {
  background: rgba(48,217,120,0.08);
  border-color: rgba(48,217,120,0.18);
  color: var(--green);
}
.mode-btn:hover:not(.active) { background: var(--glass); color: var(--white) }

/* ═══════════════════════════════════════════
   BANNERS
   ═══════════════════════════════════════════ */
#emergency-banner, #stabilized-banner {
  position: absolute; top: 50%; left: 50%; z-index: 30;
  transform: translate(-50%, -50%);
  animation: bannerIn var(--spring);
}
@keyframes bannerIn {
  from { opacity: 0; transform: translate(-50%,-50%) scale(0.9) }
  to { opacity: 1; transform: translate(-50%,-50%) scale(1) }
}

.emergency-content {
  text-align: center;
  background: rgba(239,83,80,0.05);
  border: 1px solid rgba(239,83,80,0.15);
  border-radius: var(--radius);
  padding: 32px 48px;
  backdrop-filter: blur(32px);
  -webkit-backdrop-filter: blur(32px);
  box-shadow: 0 0 80px rgba(239,83,80,0.1), var(--shadow-lg);
}
.emergency-icon {
  font-size: 2.4rem; color: var(--red); margin-bottom: 8px;
  font-weight: 900;
  text-shadow: 0 0 20px var(--red-glow);
}
.emergency-text {
  font-size: 1.3rem; font-weight: 800; letter-spacing: 0.16em;
  color: var(--red); margin-bottom: 5px;
}
.emergency-sub { font-size: 0.78rem; color: var(--text); margin-bottom: 18px }

.stabilized-content {
  text-align: center;
  background: rgba(48,217,120,0.05);
  border: 1px solid rgba(48,217,120,0.15);
  border-radius: var(--radius);
  padding: 32px 48px;
  backdrop-filter: blur(32px);
  -webkit-backdrop-filter: blur(32px);
  box-shadow: 0 0 80px var(--green-glow-soft), var(--shadow-lg);
}
.stabilized-icon {
  font-size: 2.4rem; color: var(--green); margin-bottom: 8px;
  text-shadow: 0 0 20px var(--green-glow);
}
.stabilized-text {
  font-size: 1.3rem; font-weight: 800; letter-spacing: 0.16em;
  color: var(--green); margin-bottom: 5px;
}
.stabilized-sub { font-size: 0.78rem; color: var(--text) }

/* ═══════════════════════════════════════════
   ANALYTICS
   ═══════════════════════════════════════════ */
#section-analytics { background: var(--bg); padding: 64px 32px 32px }
.analytics-container { max-width: 1060px; margin: 0 auto }
.analytics-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 24px;
}
.section-title {
  font-size: 1.2rem; font-weight: 800; letter-spacing: 0.1em;
  background: linear-gradient(135deg, var(--white), var(--cyan));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc { font-size: 0.78rem; color: var(--text-dim); margin-top: 5px }

.chart-container {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 12px;
  backdrop-filter: blur(20px);
}
#forecast-chart { width: 100%; height: 260px; display: block }

.chart-timeline { position: relative; height: 18px; margin-top: 4px }
.timeline-cursor {
  position: absolute; top: 0; width: 2px; height: 18px;
  background: var(--white-bright);
  border-radius: 1px;
  box-shadow: 0 0 10px rgba(255,255,255,0.4);
  pointer-events: none; transition: left 0.06s ease;
}

.chart-legend {
  display: flex; gap: 16px; justify-content: center; margin-bottom: 8px;
}
.legend-item {
  display: flex; align-items: center; gap: 5px;
  font-size: 0.68rem; color: var(--text-dim);
}
.legend-dot { width: 8px; height: 8px; border-radius: 50%; box-shadow: 0 0 6px currentColor }
.legend-dot.solar  { background: var(--gold); color: var(--gold) }
.legend-dot.wind   { background: var(--cyan); color: var(--cyan) }
.legend-dot.hydro  { background: var(--blue); color: var(--blue) }
.legend-dot.demand { background: var(--red); color: var(--red) }
.legend-dot.battery{ background: var(--green); color: var(--green) }

.timeline-hours {
  display: flex; justify-content: space-between;
  font-size: 0.56rem; color: var(--text-muted);
  padding: 0 18px;
}

.forecast-detail {
  display: flex; gap: 18px; justify-content: center;
  margin-top: 12px; padding: 12px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}
.fd-item { font-size: 0.75rem }
.fd-label { color: var(--text-dim) }
.fd-item span:last-child { color: var(--white); font-weight: 700 }

/* ═══════════════════════════════════════════
   COMPARE
   ═══════════════════════════════════════════ */
#section-compare { background: var(--bg); padding: 64px 32px 32px }
.compare-container { max-width: 920px; margin: 0 auto; text-align: center }

.compare-grid {
  display: flex; align-items: stretch; gap: 18px; margin-top: 32px;
}
.compare-card {
  flex: 1; background: var(--bg-panel);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; text-align: left;
  transition: var(--ease);
}
.compare-card:hover { border-color: var(--border-bright) }
.compare-card.naive  { border-color: rgba(239,83,80,0.1) }
.compare-card.optimal{ border-color: rgba(48,217,120,0.1) }
.compare-card.naive:hover  { box-shadow: var(--shadow-glow-red) }
.compare-card.optimal:hover{ box-shadow: var(--shadow-glow-green) }

.compare-card-header {
  font-size: 0.82rem; font-weight: 800; letter-spacing: 0.12em;
  margin-bottom: 2px;
}
.compare-card.naive .compare-card-header  { color: var(--red) }
.compare-card.optimal .compare-card-header{ color: var(--green) }
.compare-card-sub { font-size: 0.65rem; color: var(--text-muted); margin-bottom: 18px }

.compare-vs {
  display: flex; align-items: center;
  font-size: 0.78rem; font-weight: 800; color: var(--text-muted);
  letter-spacing: 0.12em;
}

.compare-metric { padding: 8px 0 }
.compare-metric + .compare-metric { border-top: 1px solid var(--border) }
.cm-label { font-size: 0.65rem; color: var(--text-dim); margin-bottom: 2px }
.cm-value {
  font-size: 1.05rem; font-weight: 800;
  font-variant-numeric: tabular-nums; margin-bottom: 4px;
}
.cm-bar {
  height: 3px; background: rgba(255,255,255,0.04);
  border-radius: 2px; overflow: hidden;
}
.cm-bar-fill {
  height: 100%; border-radius: 2px;
  transition: width 0.7s cubic-bezier(0.4,0,0.2,1);
}
.naive-fill { background: linear-gradient(90deg, #c62828, var(--red)) }
.ef-fill    { background: linear-gradient(90deg, var(--green-dim), var(--green)) }

/* ═══════════════════════════════════════════
   HOW IT WORKS
   ═══════════════════════════════════════════ */
#section-how-it-works { background: var(--bg); padding: 64px 32px 32px }
.how-container { max-width: 720px; margin: 0 auto; text-align: center }

.pipeline { margin-top: 32px }
.pipe-step {
  background: var(--bg-panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px;
  text-align: left; transition: var(--ease);
}
.pipe-step:hover {
  border-color: rgba(48,217,120,0.12);
  box-shadow: var(--shadow-glow-green);
}
.pipe-title {
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.12em;
  color: var(--cyan); margin-bottom: 2px;
}
.pipe-desc { font-size: 0.72rem; color: var(--text-dim); margin-bottom: 5px }
.pipe-data {
  font-size: 0.65rem; color: var(--text-muted);
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
}
.pipe-arrow {
  font-size: 1.1rem; color: var(--green); padding: 5px 0;
  text-align: center;
  text-shadow: 0 0 8px var(--green-glow-soft);
}

.math-expand { margin-top: 24px }
.math-toggle {
  background: var(--glass); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 8px 16px;
  color: var(--text-dim); font-family: inherit;
  font-size: 0.72rem; cursor: pointer; transition: var(--ease);
}
.math-toggle:hover { color: var(--white); border-color: var(--glass-border-bright) }

.math-content { margin-top: 12px; text-align: left }
.math-block {
  background: var(--bg-panel); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 16px; margin-bottom: 8px;
}
.math-title {
  font-size: 0.65rem; font-weight: 700; letter-spacing: 0.12em;
  color: var(--cyan); margin-bottom: 6px;
}
.math-eq {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.72rem; color: var(--text); line-height: 1.9;
}

/* ═══════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════ */
#main-footer {
  position: relative; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 32px;
  border-top: 1px solid var(--border);
  background: rgba(6,10,8,0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}
.footer-brand {
  font-size: 0.78rem; font-weight: 800; letter-spacing: 0.22em;
  margin-bottom: 1px;
  background: linear-gradient(135deg, var(--white), var(--green));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-sub { font-size: 0.65rem; color: var(--text-muted) }
.footer-right { display: flex; gap: 18px }
.footer-stat { font-size: 0.65rem; color: var(--text-muted) }
.footer-stat .green { color: var(--green); font-weight: 600 }

/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */
@media(max-width:1100px){
  #hero-overlay { flex-direction: column; padding: 64px 18px 18px }
  .hero-right { width: 100%; margin-top: 14px }
  #impact-panel { display: none }
}
@media(max-width:768px){
  .hero-title { font-size: 1.6rem }
  .hero-metrics { flex-direction: column; gap: 8px }
  .hero-actions { flex-direction: column }
  #stress-panel { width: calc(100% - 32px); left: 16px }
  #weather-panel { display: none }
  .compare-grid { flex-direction: column }
  .compare-vs { justify-content: center; padding: 8px 0 }
  #main-footer { flex-direction: column; gap: 8px; text-align: center }
  .footer-right { flex-wrap: wrap; justify-content: center; gap: 8px }
}

/* ═══════════════════════════════════════════
   SCROLLBAR
   ═══════════════════════════════════════════ */
::-webkit-scrollbar { width: 5px }
::-webkit-scrollbar-track { background: transparent }
::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,0.06);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.12) }

/* ═══════════════════════════════════════════
   SELECTION
   ═══════════════════════════════════════════ */
::selection {
  background: rgba(48,217,120,0.25);
  color: var(--white-bright);
}