/* ═══════════════════════════════════════════════════════════════
   PROJECT SOLAR UK — Savings Calculator
   Palette: PSUK brand green + clean surfaces.
   Fonts: Cabinet Grotesk (display) + IBM Plex Sans Condensed (body)
   Fonts are loaded in index.html <link> tags.
═══════════════════════════════════════════════════════════════ */

/* ─── Design Tokens ──────────────────────────────────────────── */
:root,
[data-theme='light'] {
  /* Surfaces */
  --color-bg:             #f5f5f7;
  --color-surface:        #ffffff;
  --color-surface-2:      #fafafa;
  --color-surface-glass:  rgba(255,255,255,0.72);
  --color-surface-offset: #f0f0f2;
  --color-divider:        #e5e5ea;
  --color-border:         #d1d1d6;
  --color-border-subtle:  #e8e8ed;

  /* Text */
  --color-text:           #1d1d1f;
  --color-text-muted:     #6e6e73;
  --color-text-faint:     #aeaeb2;
  --color-text-inverse:   #ffffff;

  /* Accent — Project Solar UK brand green (from projectsolaruk.com) */
  --color-primary:        #03624C;
  --color-primary-hover:  #024e3d;
  --color-primary-active: #013a2e;
  --color-primary-subtle: rgba(3,98,76,0.08);
  --color-primary-border: rgba(3,98,76,0.22);

  /* Green for savings/positive */
  --color-green:          #1a7f37;
  --color-green-light:    rgba(26,127,55,0.08);
  --color-green-border:   rgba(26,127,55,0.18);

  /* Data colours (charts/badges/scenarios) — all PSUK green family.
     s1 (pale/faded), s2 (PSUK deep — featured), s3 (medium bright). */
  --color-gold:           #8ed1b2;   /* s1: pale mint green — "Solar only" */
  --color-teal:           #03624C;   /* s2: PSUK deep — "Solar + battery" (featured) */
  --color-purple:         #3ab590;   /* s3: medium bright green — "Smart tariff" */

  /* Status — amber retained for warnings (intentional, distinct from brand) */
  --color-warning:        #b36200;
  --color-warning-bg:     rgba(232,135,10,0.06);
  --color-warning-border: rgba(232,135,10,0.18);

  /* Shadows — Apple-style soft */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.04), 0 1px 3px rgba(0,0,0,0.05);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.05);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.12), 0 8px 24px rgba(0,0,0,0.06);

  /* Radius */
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   16px;
  --radius-xl:   20px;
  --radius-2xl:  28px;
  --radius-full: 9999px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --t-fast: 150ms;
  --t-base: 220ms;
  --t-slow: 400ms;
  --transition: var(--t-base) var(--ease-out);

  /* Type scale */
  --text-xs:   clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
  --text-sm:   clamp(0.875rem, 0.84rem + 0.18vw, 0.9375rem);
  --text-base: clamp(1rem, 0.97rem + 0.15vw, 1.0625rem);
  --text-lg:   clamp(1.125rem, 1.05rem + 0.4vw, 1.375rem);
  --text-xl:   clamp(1.375rem, 1.1rem + 1.4vw, 2rem);
  --text-2xl:  clamp(2rem, 1.4rem + 3vw, 3.5rem);
  --text-hero: clamp(2.25rem, 1.25rem + 3.5vw, 4rem);

  /* Spacing (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Fonts — loaded in index.html */
  --font-display: 'Cabinet Grotesk', 'IBM Plex Sans', -apple-system, 'Helvetica Neue', sans-serif;
  --font-body:    'IBM Plex Sans Condensed', 'IBM Plex Sans', -apple-system, 'Helvetica Neue', sans-serif;

  /* Layout */
  --content-default: 980px;
  --content-wide:    1200px;
}

/* ─── Dark Mode ──────────────────────────────────────────────── */
[data-theme='dark'] {
  --color-bg:             #000000;
  --color-surface:        #1c1c1e;
  --color-surface-2:      #2c2c2e;
  --color-surface-glass:  rgba(28,28,30,0.80);
  --color-surface-offset: #2c2c2e;
  --color-divider:        #38383a;
  --color-border:         #48484a;
  --color-border-subtle:  #3a3a3c;
  --color-text:           #f5f5f7;
  --color-text-muted:     #8e8e93;
  --color-text-faint:     #48484a;
  --color-text-inverse:   #1d1d1f;
  --color-primary:        #3ab590;
  --color-primary-hover:  #4bc7a0;
  --color-primary-active: #5cd9b0;
  --color-primary-subtle: rgba(58,181,144,0.12);
  --color-primary-border: rgba(58,181,144,0.28);
  --color-green:          #30d158;
  --color-green-light:    rgba(48,209,88,0.10);
  --color-green-border:   rgba(48,209,88,0.22);
  --color-gold:           #a8e0c4;   /* s1: pale mint for dark bg */
  --color-teal:           #5cd9b0;   /* s2: bright PSUK green for dark bg */
  --color-purple:         #3ab590;   /* s3: medium bright green */
  --color-warning:        #f5a623;
  --color-warning-bg:     rgba(245,166,35,0.08);
  --color-warning-border: rgba(245,166,35,0.20);
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.45);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.6);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #000000;
    --color-surface:        #1c1c1e;
    --color-surface-2:      #2c2c2e;
    --color-surface-glass:  rgba(28,28,30,0.80);
    --color-surface-offset: #2c2c2e;
    --color-divider:        #38383a;
    --color-border:         #48484a;
    --color-border-subtle:  #3a3a3c;
    --color-text:           #f5f5f7;
    --color-text-muted:     #8e8e93;
    --color-text-faint:     #48484a;
    --color-text-inverse:   #1d1d1f;
    --color-primary:        #3ab590;
    --color-primary-hover:  #4bc7a0;
    --color-primary-active: #5cd9b0;
    --color-primary-subtle: rgba(58,181,144,0.12);
    --color-primary-border: rgba(58,181,144,0.28);
    --color-green:          #30d158;
    --color-green-light:    rgba(48,209,88,0.10);
    --color-green-border:   rgba(48,209,88,0.22);
    --color-gold:           #a8e0c4;
    --color-teal:           #5cd9b0;
    --color-purple:         #3ab590;
    --color-warning:        #f5a623;
    --color-warning-bg:     rgba(245,166,35,0.08);
    --color-warning-border: rgba(245,166,35,0.20);
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.45);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
    --shadow-xl: 0 24px 64px rgba(0,0,0,0.6);
  }
}

/* ─── Reset ──────────────────────────────────────────────────── */
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}
body {
  min-height: 100dvh;
  line-height: 1.5;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background: var(--color-bg);
  transition: background var(--t-slow) var(--ease-out), color var(--t-slow) var(--ease-out);
}
img,svg { display: block; max-width: 100%; }
h1,h2,h3,h4 { font-family: var(--font-display); text-wrap: balance; line-height: 1.1; letter-spacing: -0.02em; }
p,li { max-width: 72ch; }
input,button,select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { opacity: 0.8; }
table { border-collapse: collapse; width: 100%; }
ul { list-style: none; padding: 0; }
::selection { background: color-mix(in srgb, var(--color-primary) 20%, transparent); }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; border-radius: var(--radius-sm); }
.hidden { display: none !important; }

/* ─── Layout ─────────────────────────────────────────────────── */
.container { max-width: var(--content-default); margin: 0 auto; padding-inline: clamp(var(--space-5), 5vw, var(--space-12)); }
.container--wide { max-width: var(--content-wide); }

/* ─── Header ─────────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--color-surface-glass);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 0.5px solid var(--color-divider);
}
.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-12));
  height: 52px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo {
  display: flex; align-items: center; gap: var(--space-2);
  text-decoration: none; color: var(--color-text);
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.05rem; letter-spacing: -0.03em;
}
.logo svg { color: var(--color-primary); }
.theme-toggle {
  width: 34px; height: 34px; border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-muted);
  transition: color var(--transition), background var(--transition);
}
.theme-toggle:hover { color: var(--color-text); background: var(--color-surface-offset); }

/* ─── Hero ───────────────────────────────────────────────────── */
.hero {
  padding-block: clamp(2rem, 4vw, 3.5rem);
  text-align: center;
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
}
/* Subtle radial glow behind hero */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 60% at 50% 0%, color-mix(in srgb, var(--color-primary) 10%, transparent), transparent 70%);
  pointer-events: none;
}
.hero-text { position: relative; }
.hero-eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}
.hero h1 {
  font-size: var(--text-hero);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.02;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}
.hero h1 em { font-style: normal; color: var(--color-primary); }
.hero-sub {
  font-size: var(--text-lg);
  font-weight: 300;
  color: var(--color-text-muted);
  max-width: 52ch;
  margin: 0 auto var(--space-6);
  line-height: 1.55;
  letter-spacing: -0.01em;
}
.trust-bar {
  display: inline-flex; align-items: center; flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
}
.trust-bar .divider { opacity: 0.3; }

/* ─── Calculator Section ─────────────────────────────────────── */
.calculator-section {
  padding-block: clamp(1rem, 2.5vw, 2rem);
  background: var(--color-bg);
}
/* Pre-results: single centred column */
.calc-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: start;
  max-width: 520px;
  margin-inline: auto;
  transition: max-width 400ms var(--ease-out);
}
/* Post-results: two-column layout */
.calc-layout.has-results {
  grid-template-columns: 380px 1fr;
  max-width: none;
  margin-inline: 0;
}
@media (max-width: 920px) {
  .calc-layout.has-results { grid-template-columns: 1fr; }
}

/* ─── Inputs Panel ───────────────────────────────────────────── */
.inputs-panel {
  background: var(--color-surface);
  border: 0.5px solid var(--color-border-subtle);
  border-radius: var(--radius-2xl);
  padding: var(--space-8) var(--space-8);
  box-shadow: var(--shadow-lg);
  /* Only sticky once results are showing */
  position: relative;
  top: auto;
}
.has-results .inputs-panel {
  position: sticky;
  top: 68px;
}
.panel-title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-8);
  letter-spacing: -0.03em;
  color: var(--color-text);
}
.field-group { margin-bottom: var(--space-6); }
.field-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  cursor: default;
}
.field-hint {
  display: block;
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  color: var(--color-text-faint);
  margin-top: 3px;
}

/* Radio Cards */
.radio-cards {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-2);
}
.radio-card {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 4px;
  padding: var(--space-3) var(--space-2);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), box-shadow var(--transition);
  text-align: center;
  background: var(--color-surface-2);
}
.radio-card input[type="radio"] { position: absolute; opacity: 0; pointer-events: none; }
.radio-card:has(input:checked) {
  border-color: var(--color-primary);
  background: var(--color-primary-subtle);
  box-shadow: 0 0 0 1px var(--color-primary-border);
}
.radio-card:hover:not(:has(input:checked)) { border-color: var(--color-border); background: var(--color-surface-offset); }
.card-icon { font-size: 1.3rem; line-height: 1; }
.card-title { font-size: var(--text-xs); font-weight: 600; color: var(--color-text); letter-spacing: -0.01em; }
.card-sub { font-size: 0.68rem; color: var(--color-text-faint); }

/* Toggle Group — segmented control */
.toggle-group {
  display: flex;
  background: var(--color-surface-offset);
  border-radius: var(--radius-md);
  padding: 3px;
  gap: 2px;
}
.toggle-option {
  flex: 1; display: flex; align-items: center; justify-content: center;
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  font-size: var(--text-xs); font-weight: 600;
  color: var(--color-text-muted);
  border-radius: calc(var(--radius-md) - 2px);
  transition: color var(--transition), background var(--transition), box-shadow var(--transition);
}
.toggle-option input[type="radio"] { position: absolute; opacity: 0; pointer-events: none; }
.toggle-option:has(input:checked) {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-xs);
}
.toggle-option:hover:not(:has(input:checked)) { color: var(--color-text); }

/* Roof Grid */
.roof-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-2);
}
.roof-option {
  display: flex; align-items: center; justify-content: center;
  padding: var(--space-2);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--text-xs); font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-surface-2);
  transition: border-color var(--transition), background var(--transition), color var(--transition);
}
.roof-option input[type="radio"] { position: absolute; opacity: 0; pointer-events: none; }
.roof-option:has(input:checked) {
  border-color: var(--color-primary);
  background: var(--color-primary-subtle);
  color: var(--color-primary);
  font-weight: 700;
}
.roof-option:hover:not(:has(input:checked)) { border-color: var(--color-border); background: var(--color-surface-offset); color: var(--color-text); }

/* Region selector */
.select-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  color: var(--color-text);
  font-size: var(--text-sm); font-weight: 500;
  cursor: pointer;
  appearance: none; -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23aeaeb2' stroke-width='2.5'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  padding-right: var(--space-10);
  transition: border-color var(--transition);
}
.select-input:focus { border-color: var(--color-primary); outline: none; background-color: var(--color-surface); }
.region-note {
  margin-top: var(--space-2);
  font-size: var(--text-xs); font-weight: 600;
  color: var(--color-primary); letter-spacing: 0.01em;
}

/* Sliders */
.slider-row { display: flex; align-items: center; gap: var(--space-4); }
.slider {
  flex: 1; -webkit-appearance: none; appearance: none;
  height: 3px;
  background: var(--color-divider);
  border-radius: var(--radius-full); outline: none;
}
.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform var(--t-fast) var(--ease-spring), box-shadow var(--transition);
}
.slider::-webkit-slider-thumb:hover { transform: scale(1.2); box-shadow: var(--shadow-md); }
.slider::-moz-range-thumb {
  width: 22px; height: 22px; border: 2px solid var(--color-primary);
  border-radius: 50%; background: var(--color-surface);
  cursor: pointer; box-shadow: var(--shadow-sm);
}
.slider-value {
  min-width: 52px; text-align: right;
  font-size: var(--text-sm); font-weight: 700;
  color: var(--color-primary); letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
}
.slider-labels {
  display: flex; justify-content: space-between;
  margin-top: var(--space-1);
  font-size: 0.68rem; color: var(--color-text-faint);
}

/* Number inputs */
.rate-input-wrap { display: flex; align-items: center; gap: var(--space-3); }
.text-input {
  width: 108px;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  color: var(--color-text);
  font-size: var(--text-base); font-weight: 600;
  transition: border-color var(--transition), box-shadow var(--transition);
  font-variant-numeric: tabular-nums;
}
.text-input:focus { border-color: var(--color-primary); outline: none; box-shadow: 0 0 0 3px var(--color-primary-subtle); }
.rate-suffix { font-size: var(--text-xs); color: var(--color-text-muted); font-weight: 500; }

/* Divider between sections */
.input-divider {
  height: 0.5px;
  background: var(--color-divider);
  margin-block: var(--space-6);
}

/* CTA */
.calc-cta-wrap { margin-top: var(--space-8); }
.btn-primary {
  width: 100%;
  padding: 14px var(--space-6);
  background: var(--color-primary);
  color: #fff;
  border: none; border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: var(--text-sm); font-weight: 700;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: background var(--transition), transform var(--t-fast) var(--ease-spring), box-shadow var(--transition);
  box-shadow: 0 4px 16px color-mix(in srgb, var(--color-primary) 40%, transparent);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: scale(1.015);
  box-shadow: 0 6px 24px color-mix(in srgb, var(--color-primary) 50%, transparent);
}
.btn-primary:active { transform: scale(0.985); }

/* ─── Results Panel ───────────────────────────────────────────── */
.results-panel { min-height: 500px; }

/* Empty state */
.results-empty {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; padding: var(--space-20) var(--space-8);
  text-align: center;
}
.empty-icon { margin-bottom: var(--space-5); color: var(--color-text-faint); }
.empty-title {
  font-family: var(--font-display); font-size: var(--text-lg);
  font-weight: 600; letter-spacing: -0.02em;
  color: var(--color-text-muted); margin-bottom: var(--space-2);
}
.empty-body { font-size: var(--text-sm); max-width: 34ch; color: var(--color-text-faint); line-height: 1.6; }

/* Results Headline */
.results-headline {
  background: var(--color-green-light);
  border: 0.5px solid var(--color-green-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-10) var(--space-10);
  margin-bottom: var(--space-6);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.results-headline::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 50% 120%, color-mix(in srgb, var(--color-green) 8%, transparent), transparent);
  pointer-events: none;
}
.headline-label {
  font-size: var(--text-xs); font-weight: 600;
  letter-spacing: 0.10em; text-transform: uppercase;
  color: var(--color-green); margin-bottom: var(--space-3);
}
.headline-amount {
  font-family: var(--font-display);
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 700; letter-spacing: -0.05em;
  color: var(--color-green); line-height: 1;
  margin-bottom: var(--space-3);
}
.headline-sub {
  font-size: var(--text-sm); color: var(--color-text-muted);
  font-weight: 400; letter-spacing: -0.01em;
}
.estimates-note {
  margin-top: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.65;
  padding: var(--space-3) var(--space-4);
  background: var(--color-warning-bg);
  border: 0.5px solid var(--color-warning-border);
  border-radius: var(--radius-md);
  max-width: none;
}

/* Scenario cards */
.scenario-label {
  font-size: var(--text-xs); font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--color-text-faint); margin-bottom: var(--space-4);
}
.scenarios {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3); margin-bottom: var(--space-6);
}
@media (max-width: 700px) { .scenarios { grid-template-columns: 1fr; } }

.scenario-card {
  background: var(--color-surface);
  border: 0.5px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  position: relative;
  transition: box-shadow var(--transition), transform var(--t-fast) var(--ease-out);
}
.scenario-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.scenario-card--featured {
  background: var(--color-surface);
  border-color: var(--color-teal);
  box-shadow: 0 0 0 0.5px var(--color-teal), var(--shadow-sm);
}
.scenario-badge {
  position: absolute; top: -11px; left: 50%; transform: translateX(-50%);
  background: var(--color-teal); color: #fff;
  font-size: 0.65rem; font-weight: 700;
  padding: 3px 10px; border-radius: var(--radius-full);
  white-space: nowrap; letter-spacing: 0.04em;
  text-transform: uppercase;
}
.scenario-header {
  display: flex; align-items: flex-start; gap: var(--space-3); margin-bottom: var(--space-4);
}
.scenario-icon {
  width: 36px; height: 36px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.solar-icon  { background: rgba(142,209,178,0.22); color: var(--color-primary); }
.battery-icon{ background: rgba(3,98,76,0.10);     color: var(--color-primary); }
.smart-icon  { background: rgba(58,181,144,0.18);  color: var(--color-primary); }
.scenario-title-wrap { display: flex; flex-direction: column; gap: 3px; }
.scenario-name { font-size: var(--text-xs); font-weight: 700; color: var(--color-text); line-height: 1.3; letter-spacing: -0.01em; }
.scenario-tag {
  font-size: 0.65rem; font-weight: 600; padding: 2px 7px;
  border-radius: var(--radius-full); background: var(--color-surface-offset);
  color: var(--color-text-muted); width: fit-content; letter-spacing: 0.02em;
}
.scenario-tag--smart { background: rgba(58,181,144,0.15); color: var(--color-primary); }

.scenario-metrics { display: flex; flex-direction: column; gap: 0; margin-bottom: var(--space-4); }
.metric {
  display: flex; justify-content: space-between; align-items: center;
  padding: var(--space-2) 0;
  border-bottom: 0.5px solid var(--color-divider);
  font-size: var(--text-xs);
}
.metric:last-child { border-bottom: none; }
.metric.highlight .metric-value {
  font-size: var(--text-sm); font-weight: 800;
  color: var(--color-green); letter-spacing: -0.02em;
}
.metric-label { color: var(--color-text-muted); letter-spacing: -0.01em; }
.metric-value { font-weight: 600; color: var(--color-text); font-variant-numeric: tabular-nums; }
.est-value::before {
  content: 'est. ';
  font-size: 0.72em; font-weight: 500; opacity: 0.45; letter-spacing: 0.01em;
}
.scenario-bar-wrap {
  height: 3px; background: var(--color-divider);
  border-radius: var(--radius-full); overflow: hidden; margin-bottom: var(--space-3);
}
.scenario-bar {
  height: 100%; border-radius: var(--radius-full);
  transition: width 0.7s cubic-bezier(0.16,1,0.3,1); width: 0%;
}
#bar-s1 { background: var(--color-gold); }
#bar-s2 { background: var(--color-teal); }
#bar-s3 { background: var(--color-purple); }
.scenario-payback {
  font-size: 0.68rem; color: var(--color-text-faint); text-align: center;
  letter-spacing: 0.01em;
}

/* ─── Charts ─────────────────────────────────────────────────── */
.chart-section {
  background: var(--color-surface);
  border: 0.5px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-6) var(--space-6);
  margin-bottom: var(--space-4);
}
.chart-title {
  font-size: var(--text-base); font-weight: 700;
  letter-spacing: -0.02em; margin-bottom: 4px;
}
.chart-sub { font-size: var(--text-xs); color: var(--color-text-muted); margin-bottom: var(--space-5); line-height: 1.5; }
.chart-wrap { width: 100%; overflow-x: auto; }
.chart-wrap canvas { max-width: 100%; }
.chart-legend {
  display: flex; flex-wrap: wrap; gap: var(--space-5); margin-top: var(--space-4);
}
.legend-item { display: flex; align-items: center; gap: var(--space-2); font-size: var(--text-xs); color: var(--color-text-muted); }
.legend-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.legend-s1 .legend-dot { background: var(--color-gold); }
.legend-s2 .legend-dot { background: var(--color-teal); }
.legend-s3 .legend-dot { background: var(--color-purple); }

/* ─── Breakdown Table ─────────────────────────────────────────── */
.breakdown-section {
  background: var(--color-surface);
  border: 0.5px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
  overflow-x: auto;
}
.breakdown-title { font-size: var(--text-base); font-weight: 700; letter-spacing: -0.02em; margin-bottom: var(--space-5); }
.breakdown-table { font-size: var(--text-sm); min-width: 480px; }
.breakdown-table th {
  text-align: left;
  padding: var(--space-2) var(--space-3);
  font-size: 0.68rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--color-text-faint);
  border-bottom: 0.5px solid var(--color-divider);
}
.breakdown-table td {
  padding: var(--space-3) var(--space-3);
  border-bottom: 0.5px solid var(--color-divider);
  color: var(--color-text);
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
}
.breakdown-table td:first-child { color: var(--color-text-muted); }
.breakdown-table td.muted { color: var(--color-text-faint); }
.breakdown-table .total-row td {
  font-weight: 700; color: var(--color-green);
  border-top: 0.5px solid var(--color-border); border-bottom: none;
}
.breakdown-table .total-row td:first-child { color: var(--color-text); font-weight: 600; }

/* ─── Gauges ──────────────────────────────────────────────────── */
.gauges-section {
  background: var(--color-surface);
  border: 0.5px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
}
.gauges-title { font-size: var(--text-base); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 4px; }
.gauges-sub { font-size: var(--text-xs); color: var(--color-text-muted); margin-bottom: var(--space-6); }
.gauges-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.gauge-item { display: flex; flex-direction: column; align-items: center; gap: var(--space-2); }
.gauge-wrap { position: relative; width: 100%; max-width: 110px; }
.gauge-svg { width: 100%; }
.gauge-pct {
  position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  font-family: var(--font-display); font-size: var(--text-lg);
  font-weight: 700; color: var(--color-text); letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}
.gauge-label { font-size: var(--text-xs); font-weight: 500; color: var(--color-text-muted); text-align: center; }
.gauge-fill { transition: stroke-dasharray 0.9s cubic-bezier(0.16,1,0.3,1); }

/* ─── EV Spotlight ────────────────────────────────────────────── */
.ev-spotlight {
  background: var(--color-primary-subtle);
  border: 0.5px solid var(--color-primary-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  display: flex; gap: var(--space-4); align-items: flex-start;
  margin-bottom: var(--space-4);
}
.ev-icon { color: var(--color-primary); flex-shrink: 0; margin-top: 2px; }
.ev-text { font-size: var(--text-xs); color: var(--color-text); line-height: 1.65; }

/* ─── Assumptions ─────────────────────────────────────────────── */
.assumptions-box {
  background: var(--color-surface-offset);
  border: 0.5px solid var(--color-border-subtle);
  border-radius: var(--radius-xl); overflow: hidden;
}
.assumptions-toggle {
  padding: var(--space-4) var(--space-5);
  cursor: pointer; font-size: var(--text-xs); font-weight: 600;
  color: var(--color-text-muted); list-style: none;
  display: flex; align-items: center; gap: var(--space-2);
  letter-spacing: 0.01em;
}
.assumptions-toggle::marker, .assumptions-toggle::-webkit-details-marker { display: none; }
.assumptions-toggle::before { content: '▸'; font-size: 0.65em; }
details[open] .assumptions-toggle::before { content: '▾'; }
.assumptions-body {
  padding: var(--space-4) var(--space-5) var(--space-5);
  border-top: 0.5px solid var(--color-border-subtle);
  font-size: var(--text-xs); color: var(--color-text-muted); line-height: 1.7;
}
.assumptions-body p { margin-bottom: var(--space-3); }
.assumptions-body ul { display: flex; flex-direction: column; gap: var(--space-2); padding-left: var(--space-4); list-style: disc; }

/* ─── Explainer Section ───────────────────────────────────────── */
.explainer-section {
  padding-block: clamp(2rem, 4vw, 3.5rem);
  background: var(--color-surface);
  border-top: 0.5px solid var(--color-divider);
}
.section-title {
  font-size: var(--text-2xl); font-weight: 700; letter-spacing: -0.04em;
  margin-bottom: var(--space-3); text-align: center;
}
.section-sub {
  font-size: var(--text-lg); font-weight: 300; color: var(--color-text-muted);
  text-align: center; max-width: 50ch; margin: 0 auto var(--space-8);
  letter-spacing: -0.01em; line-height: 1.55;
}
.explainer-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-5);
}
@media (max-width: 800px) { .explainer-grid { grid-template-columns: 1fr; } }
.explainer-card {
  background: var(--color-bg);
  border: 0.5px solid var(--color-border-subtle);
  border-radius: var(--radius-2xl); padding: var(--space-8);
  transition: box-shadow var(--transition), transform var(--t-fast) var(--ease-out);
}
.explainer-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.explainer-card.exp-featured {
  background: var(--color-surface-2);
  border-color: var(--color-teal);
  box-shadow: 0 0 0 0.5px var(--color-teal);
}
.exp-icon {
  width: 52px; height: 52px; border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center; margin-bottom: var(--space-5);
}
.solar-icon-lg  { background: rgba(142,209,178,0.22); color: var(--color-primary); }
.battery-icon-lg{ background: rgba(3,98,76,0.10);     color: var(--color-primary); }
.smart-icon-lg  { background: rgba(58,181,144,0.18);  color: var(--color-primary); }
.explainer-card h3 {
  font-size: var(--text-base); font-weight: 700; letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
  display: flex; align-items: center; flex-wrap: wrap; gap: var(--space-2);
}
.badge-featured {
  font-size: 0.65rem; font-weight: 700; padding: 3px 8px;
  border-radius: var(--radius-full); background: var(--color-teal); color: #fff;
  text-transform: uppercase; letter-spacing: 0.04em;
}
.explainer-card p {
  font-size: var(--text-sm); color: var(--color-text-muted);
  margin-bottom: var(--space-4); line-height: 1.7;
}
.exp-list { display: flex; flex-direction: column; gap: var(--space-2); }
.exp-list li { font-size: var(--text-xs); color: var(--color-text-muted); }

/* ─── SEG Section ─────────────────────────────────────────────── */
.seg-section {
  padding-block: clamp(2rem, 4vw, 3.5rem);
  background: var(--color-bg);
  border-top: 0.5px solid var(--color-divider);
}
.seg-inner { max-width: 680px; margin: 0 auto; }
.seg-text h2 { font-size: var(--text-xl); font-weight: 700; letter-spacing: -0.03em; margin-bottom: var(--space-4); }
.seg-text > p { font-size: var(--text-base); color: var(--color-text-muted); margin-bottom: var(--space-8); line-height: 1.7; font-weight: 300; }
.seg-table-wrap {
  overflow-x: auto; margin-bottom: var(--space-4);
  border-radius: var(--radius-xl); border: 0.5px solid var(--color-border-subtle);
  box-shadow: var(--shadow-sm);
}
.seg-table { font-size: var(--text-sm); }
.seg-table th {
  text-align: left; padding: var(--space-3) var(--space-5);
  background: var(--color-surface-2);
  font-size: 0.68rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--color-text-faint);
}
.seg-table td {
  padding: var(--space-3) var(--space-5);
  border-top: 0.5px solid var(--color-divider);
  font-size: var(--text-xs);
}
.seg-table tr:hover td { background: var(--color-surface-offset); }
.rate-high { font-weight: 700; color: var(--color-green); }
.rate-mid  { font-weight: 600; color: var(--color-primary); }
.rate-low  { color: var(--color-text-muted); }
.seg-note { font-size: var(--text-xs); color: var(--color-text-muted); }
.seg-note a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 2px; }

/* ─── Footer ──────────────────────────────────────────────────── */
.site-footer {
  padding-block: var(--space-12);
  background: var(--color-surface);
  border-top: 0.5px solid var(--color-divider);
}
.footer-inner { display: flex; flex-direction: column; gap: var(--space-4); }
.footer-logo {
  display: flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-display); font-weight: 700; font-size: var(--text-sm);
  color: var(--color-text-muted); letter-spacing: -0.02em;
}
.footer-logo svg { color: var(--color-text-faint); }
.footer-disclaimer {
  font-size: var(--text-xs); color: var(--color-text-faint);
  max-width: 80ch; line-height: 1.7;
}
.footer-sources { font-size: var(--text-xs); color: var(--color-text-faint); }
.footer-sources a { color: var(--color-text-faint); text-decoration: underline; text-underline-offset: 2px; opacity: 0.8; }

/* ─── Input panel divider ─────────────────────────────────────── */
.input-divider {
  height: 0.5px; background: var(--color-divider); margin-block: var(--space-6);
}

/* ─── Utility ─────────────────────────────────────────────────── */
.muted { color: var(--color-text-muted) !important; }

@media (prefers-reduced-motion: reduce) {
  *,*::before,*::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ═══════════════════════════════════════════════════════════════
   HELP TOOLTIPS
═══════════════════════════════════════════════════════════════ */
.help-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 10px;
  font-weight: 600;
  font-family: var(--font-body);
  line-height: 1;
  cursor: pointer;
  vertical-align: middle;
  margin-left: 4px;
  position: relative;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  flex-shrink: 0;
}
.help-icon:hover,
.help-icon:focus-visible {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
/* Tooltip bubble — rendered via JS, appended to body */
.tooltip-bubble {
  position: fixed;
  z-index: 9000;
  max-width: 280px;
  background: var(--color-text);
  color: var(--color-text-inverse);
  padding: 10px 13px;
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  line-height: 1.55;
  font-family: var(--font-body);
  box-shadow: var(--shadow-lg);
  pointer-events: none;
  opacity: 0;
  transform: translateY(4px) scale(0.97);
  transition: opacity 160ms var(--ease-out), transform 160ms var(--ease-out);
}
.tooltip-bubble.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}
/* Small arrow */
.tooltip-bubble::before {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 12px;
  border: 5px solid transparent;
  border-bottom-color: var(--color-text);
}
.tooltip-bubble.tip-above::before {
  bottom: auto;
  top: 100%;
  border-bottom-color: transparent;
  border-top-color: var(--color-text);
}
[data-theme='dark'] .tooltip-bubble {
  background: #f5f5f7;
  color: #1d1d1f;
}
[data-theme='dark'] .tooltip-bubble::before { border-bottom-color: #f5f5f7; }
[data-theme='dark'] .tooltip-bubble.tip-above::before { border-top-color: #f5f5f7; border-bottom-color: transparent; }

/* ═══════════════════════════════════════════════════════════════
   GLOSSARY SECTION
═══════════════════════════════════════════════════════════════ */
.glossary-section {
  padding-block: clamp(2rem, 4vw, 3.5rem);
  background: var(--color-bg);
  border-top: 0.5px solid var(--color-divider);
}
.glossary-header {
  text-align: center;
  max-width: 620px;
  margin: 0 auto clamp(1.5rem, 3vw, 2.25rem);
}
.glossary-eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}
.glossary-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--color-text);
  margin-bottom: 0.75rem;
  line-height: 1.15;
}
.glossary-sub {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.55;
  max-width: 560px;
  margin: 0 auto;
}
.glossary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1px;
  background: var(--color-border-subtle);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.glossary-card {
  background: var(--color-surface);
  padding: clamp(1.25rem, 2.5vw, 1.75rem);
  transition: background var(--transition);
}
.glossary-card:hover {
  background: var(--color-surface-2);
}
.glossary-term-header {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 0.625rem;
}
.glossary-icon {
  font-size: 1.125rem;
  line-height: 1;
  flex-shrink: 0;
}
.glossary-term {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
  margin: 0;
}
.glossary-def {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: none;
}

/* ═══════════════════════════════════════════════════════════════
   CTA SECTION
═══════════════════════════════════════════════════════════════ */
.cta-section {
  padding-block: clamp(2rem, 4vw, 3.5rem);
  background: var(--color-bg);
  border-top: 0.5px solid var(--color-divider);
}
.cta-inner {
  position: relative;
  overflow: hidden;
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  background: var(--color-text);
  border-radius: var(--radius-2xl);
  padding: clamp(2.5rem, 6vw, 4.5rem) clamp(1.5rem, 6vw, 4rem);
  box-shadow: var(--shadow-xl);
}
.cta-glow {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(58,181,144,0.35) 0%, transparent 70%);
  pointer-events: none;
}
.cta-eyebrow {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 0.875rem;
  position: relative;
}
.cta-headline {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: #f5f5f7;
  line-height: 1.1;
  margin-bottom: 1.125rem;
  position: relative;
}
.cta-body {
  font-size: var(--text-base);
  color: rgba(245,245,247,0.72);
  line-height: 1.65;
  max-width: 52ch;
  margin: 0 auto 2.25rem;
  position: relative;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  justify-content: center;
  position: relative;
}
.btn-cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.875rem;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 600;
  font-family: var(--font-display);
  text-decoration: none;
  letter-spacing: -0.01em;
  box-shadow: 0 0 0 0 rgba(232,135,10,0);
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.btn-cta-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(232,135,10,0.38);
}
.btn-cta-primary:active { transform: translateY(0); }
.btn-cta-secondary {
  display: inline-flex;
  align-items: center;
  padding: 0.875rem 1.875rem;
  border-radius: var(--radius-full);
  background: transparent;
  border: 1px solid rgba(245,245,247,0.22);
  color: rgba(245,245,247,0.82);
  font-size: var(--text-sm);
  font-weight: 500;
  font-family: var(--font-display);
  text-decoration: none;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.btn-cta-secondary:hover {
  border-color: rgba(245,245,247,0.5);
  color: #f5f5f7;
  background: rgba(245,245,247,0.06);
}
.cta-reassurance {
  margin-top: 1.25rem;
  font-size: var(--text-xs);
  color: rgba(245,245,247,0.4);
  position: relative;
}

/* Dark mode for CTA (inverted block — already dark, tweak glow) */
[data-theme='dark'] .cta-inner {
  background: #000;
  border: 0.5px solid rgba(255,255,255,0.08);
}
[data-theme='dark'] .cta-glow {
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(232,135,10,0.25) 0%, transparent 70%);
}

/* ─── Responsive tweaks ──────────────────────────────────────── */
@media (max-width: 640px) {
  .glossary-grid { grid-template-columns: 1fr; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .btn-cta-primary, .btn-cta-secondary { text-align: center; justify-content: center; }
  .help-icon { width: 15px; height: 15px; font-size: 9px; }
}

/* ═══════════════════════════════════════════════════════════════
   MOBILE OPTIMISATION — comprehensive overrides ≤768px
═══════════════════════════════════════════════════════════════ */

/* ── Global mobile tweaks ──────────────────────────────────── */
@media (max-width: 768px) {

  /* Prevent iOS text zoom on focus */
  input, select, textarea {
    font-size: 16px !important;
  }

  /* Ensure container has comfortable side padding */
  .container {
    padding-inline: 1.125rem;
  }

  /* ── Header ──────────────────────────────────────────────── */
  .header-inner {
    padding-inline: 1.125rem;
    height: 48px;
  }

  /* ── Hero ────────────────────────────────────────────────── */
  .hero {
    padding-block: 3rem 2rem;
  }
  .hero h1 {
    font-size: clamp(2.2rem, 10vw, 3.2rem);
    letter-spacing: -0.035em;
  }
  .hero-sub {
    font-size: 1rem;
    margin-bottom: 1.5rem;
  }
  .trust-bar {
    justify-content: center;
    gap: 0.5rem;
    padding-inline: 1rem;
  }
  .trust-bar .divider { display: none; }

  /* ── Calculator section layout ───────────────────────────── */
  .calculator-section {
    padding-block: 1.5rem 2.5rem;
  }
  .calc-layout {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  /* ── Inputs Panel — de-sticky on mobile ──────────────────── */
  .inputs-panel {
    position: relative;     /* override sticky */
    top: auto;
    padding: 1.25rem 1.125rem;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
  }
  .panel-title {
    font-size: 1rem;
    margin-bottom: 1.25rem;
  }
  .field-group {
    margin-bottom: 1.125rem;
  }

  /* ── Radio cards — keep 3 cols but tighter ───────────────── */
  .radio-cards {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.375rem;
  }
  .radio-card {
    padding: 0.5rem 0.25rem;
  }
  .card-icon { font-size: 1.1rem; }
  .card-title { font-size: 0.68rem; }
  .card-sub { font-size: 0.6rem; }

  /* ── Toggle group — equal thirds, taller tap target ─────── */
  .toggle-group { padding: 2px; }
  .toggle-option {
    padding: 0.625rem 0.25rem;
    font-size: 0.7rem;
    min-height: 44px;
  }

  /* ── Roof grid — 4 cols still fits, just smaller text ────── */
  .roof-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 0.375rem;
  }
  .roof-option {
    padding: 0.5rem 0.25rem;
    font-size: 0.7rem;
    min-height: 40px;
  }

  /* ── Sliders — larger thumb for fingers ──────────────────── */
  .slider {
    height: 4px;
  }
  .slider::-webkit-slider-thumb {
    width: 28px;
    height: 28px;
  }
  .slider::-moz-range-thumb {
    width: 28px;
    height: 28px;
  }
  .slider-row {
    gap: 0.875rem;
  }
  .slider-value {
    min-width: 48px;
    font-size: 0.875rem;
  }

  /* ── Number inputs — full width on mobile ────────────────── */
  .rate-input-wrap {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .text-input {
    width: 120px;
    min-height: 44px;
    font-size: 16px;
  }

  /* ── Calculate button ────────────────────────────────────── */
  .btn-primary {
    padding: 16px 1.5rem;
    font-size: 1rem;
    min-height: 52px;
  }
  .calc-cta-wrap { margin-top: 1.5rem; }

  /* ── Results — remove internal sticky ────────────────────── */
  .results-panel {
    min-height: auto;
  }

  /* ── Results headline — reduce padding ───────────────────── */
  .results-headline {
    padding: 1.5rem 1.25rem;
    border-radius: 16px;
    margin-bottom: 1.125rem;
  }
  .headline-amount {
    font-size: clamp(2.4rem, 11vw, 3.5rem);
  }

  /* ── Scenario cards — single column ─────────────────────── */
  .scenarios {
    grid-template-columns: 1fr;
    gap: 0.875rem;
    margin-bottom: 1.125rem;
  }
  /* Featured badge needs clearance on single col */
  .scenario-card--featured {
    margin-top: 14px;
  }

  /* ── Charts — reduce padding ─────────────────────────────── */
  .chart-section {
    padding: 1.125rem 1rem;
    border-radius: 16px;
  }
  .chart-title { font-size: 0.9375rem; }

  /* ── Breakdown table — compact horizontal scroll ────────── */
  .breakdown-section {
    padding: 1rem 0;
    border-radius: 16px;
  }
  .breakdown-title {
    padding-inline: 1rem;
    font-size: 0.9375rem;
  }
  .breakdown-table {
    min-width: 360px;
    font-size: 0.72rem;
  }
  .breakdown-table th {
    padding: 0.5rem 0.75rem;
    font-size: 0.6rem;
  }
  .breakdown-table td {
    padding: 0.5rem 0.75rem;
    font-size: 0.72rem;
  }

  /* ── Gauges — 3 col still works, just smaller ────────────── */
  .gauges-section {
    padding: 1.125rem 1rem;
    border-radius: 16px;
  }
  .gauges-row {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
  }
  .gauge-pct {
    font-size: 1rem;
  }
  .gauge-label { font-size: 0.65rem; }

  /* ── EV spotlight ────────────────────────────────────────── */
  .ev-spotlight {
    flex-direction: column;
    gap: 0.5rem;
  }

  /* ── Assumptions ─────────────────────────────────────────── */
  .assumptions-box { border-radius: 16px; }

  /* ── Glossary section ────────────────────────────────────── */
  .glossary-section {
    padding-block: 3rem 3.5rem;
  }
  .glossary-header h2 {
    font-size: clamp(1.6rem, 7vw, 2rem);
  }
  .glossary-grid {
    grid-template-columns: 1fr;
    border-radius: 16px;
  }
  .glossary-card {
    padding: 1.125rem 1rem;
  }

  /* ── Explainer section ───────────────────────────────────── */
  .explainer-section {
    padding-block: 3rem 3.5rem;
  }
  .section-title { font-size: 1.75rem; }
  .section-sub { font-size: 1rem; margin-bottom: 2rem; }
  .explainer-grid { grid-template-columns: 1fr; gap: 0.875rem; }
  .explainer-card { padding: 1.375rem 1.125rem; border-radius: 18px; }

  /* ── SEG section ─────────────────────────────────────────── */
  .seg-section { padding-block: 3rem; }
  .seg-table-wrap { border-radius: 14px; }
  .seg-table th, .seg-table td { padding: 0.625rem 0.875rem; }

  /* ── CTA section ─────────────────────────────────────────── */
  .cta-section { padding-block: 2.5rem 3rem; }
  .cta-inner {
    border-radius: 20px;
    padding: 2rem 1.25rem;
  }
  .cta-headline {
    font-size: clamp(1.6rem, 7vw, 2rem);
  }
  .cta-body {
    font-size: 0.9375rem;
    margin-bottom: 1.75rem;
  }
  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .btn-cta-primary, .btn-cta-secondary {
    text-align: center;
    justify-content: center;
    padding: 0.9375rem 1.25rem;
    font-size: 0.9375rem;
    min-height: 50px;
  }

  /* ── Tooltip bubble — wider on mobile ────────────────────── */
  .tooltip-bubble {
    max-width: calc(100vw - 2rem);
    left: 1rem !important;
  }

  /* ── Footer ──────────────────────────────────────────────── */
  .site-footer { padding-block: 2rem; }
}

/* ── Very small screens (≤ 380px) ─────────────────────────── */
@media (max-width: 380px) {
  .radio-cards { grid-template-columns: repeat(3, 1fr); gap: 0.25rem; }
  .card-title { font-size: 0.62rem; }
  .roof-grid { grid-template-columns: repeat(4, 1fr); }
  .roof-option { font-size: 0.65rem; }
  .toggle-option { font-size: 0.65rem; }
  .gauges-row { gap: 0.5rem; }
}

/* ═══════════════════════════════════════════════════════════════
   PDF CAPTURE CARD
═══════════════════════════════════════════════════════════════ */
.pdf-capture-card {
  margin-top: var(--space-4);
  background: var(--color-surface);
  border: 0.5px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  /* Hide until results have been calculated */
  display: none;
}
.pdf-capture-card.visible { display: block; }

.pdf-capture-inner {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  margin-bottom: var(--space-5);
}
.pdf-capture-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-lg);
  background: #03624C1A;
  color: #03624C;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
[data-theme='dark'] .pdf-capture-icon {
  background: rgba(3,98,76,0.25);
  color: #4CAF8C;
}
.pdf-capture-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}
.pdf-capture-sub {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: none;
}

/* Form fields */
.pdf-form-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.pdf-field { display: flex; flex-direction: column; gap: 5px; }
.pdf-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.pdf-input {
  padding: 0.6875rem var(--space-4);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  color: var(--color-text);
  font-size: var(--text-sm);
  font-weight: 500;
  width: 100%;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.pdf-input:focus {
  border-color: #03624C;
  outline: none;
  box-shadow: 0 0 0 3px rgba(3,98,76,0.12);
}
.pdf-input::placeholder { color: var(--color-text-faint); }
.pdf-input.error { border-color: #c0392b; }

.pdf-form-error {
  font-size: var(--text-xs);
  color: #c0392b;
  margin-bottom: var(--space-3);
  font-weight: 500;
}

.btn-pdf-download {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.875rem var(--space-6);
  background: #03624C;
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: background var(--transition), transform var(--t-fast) var(--ease-spring), box-shadow var(--transition);
  box-shadow: 0 4px 16px rgba(3,98,76,0.35);
  margin-bottom: var(--space-3);
}
.btn-pdf-download:hover {
  background: #024d3b;
  transform: scale(1.015);
  box-shadow: 0 6px 24px rgba(3,98,76,0.45);
}
.btn-pdf-download:active { transform: scale(0.985); }
.btn-pdf-download:disabled {
  background: var(--color-text-faint);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}
.btn-pdf-download .spinner {
  display: none;
  width: 16px; height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}
.btn-pdf-download.loading .spinner { display: block; }
.btn-pdf-download.loading .btn-icon { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }

.pdf-privacy {
  font-size: 0.68rem;
  color: var(--color-text-faint);
  line-height: 1.55;
  text-align: center;
  max-width: none;
}
.pdf-privacy a { color: var(--color-text-faint); text-decoration: underline; }

/* Success state */
.pdf-success {
  display: none;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-3);
  padding: var(--space-4) 0 var(--space-2);
}
.pdf-success.visible { display: flex; }
.pdf-success-icon {
  width: 48px; height: 48px;
  background: rgba(3,98,76,0.1);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #03624C;
}
.pdf-success-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
}
.pdf-success-sub { font-size: var(--text-xs); color: var(--color-text-muted); max-width: none; }
.btn-pdf-again {
  font-size: var(--text-xs);
  font-weight: 600;
  color: #03624C;
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: underline;
  padding: 0;
}

/* Mobile */
@media (max-width: 768px) {
  .pdf-form-fields { grid-template-columns: 1fr; }
  .pdf-capture-inner { flex-direction: column; gap: var(--space-3); }
}

/* ═══════════════════════════════════════════════════════════════
   LEAD CAPTURE MODAL
═══════════════════════════════════════════════════════════════ */
.lead-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  transition: opacity 220ms ease;
}
.lead-modal-backdrop:not([hidden]) {
  opacity: 1;
}
/* hidden attribute hides it; we use JS to remove it */
.lead-modal-backdrop[hidden] { display: none; }

.lead-modal-box {
  background: var(--color-surface);
  border: 0.5px solid var(--color-border-subtle);
  border-radius: var(--radius-2xl);
  box-shadow: 0 32px 80px rgba(0,0,0,0.28);
  width: 100%;
  max-width: 480px;
  overflow: hidden;
  transform: translateY(12px) scale(0.98);
  transition: transform 260ms var(--ease-spring);
}
.lead-modal-backdrop:not([hidden]) .lead-modal-box {
  transform: translateY(0) scale(1);
}

.lead-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.125rem 1.375rem 0;
}
.lead-modal-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  color: #03624C;
  letter-spacing: -0.02em;
}
.lead-modal-close {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-surface-offset);
  border: none;
  border-radius: 50%;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}
.lead-modal-close:hover { background: var(--color-surface-2); color: var(--color-text); }

.lead-modal-body {
  padding: 1.25rem 1.375rem 1.625rem;
}
.lead-modal-eyebrow {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #03624C;
  margin-bottom: 0.5rem;
}
.lead-modal-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--color-text);
  line-height: 1.15;
  margin-bottom: 0.625rem;
}
.lead-modal-sub {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}
.lead-modal-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.btn-modal-submit {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.9375rem 1.5rem;
  background: #03624C;
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: -0.01em;
  cursor: pointer;
  margin-bottom: var(--space-3);
  box-shadow: 0 4px 16px rgba(3,98,76,0.35);
  transition: background var(--transition), transform var(--t-fast) var(--ease-spring), box-shadow var(--transition);
}
.btn-modal-submit:hover {
  background: #024d3b;
  transform: scale(1.015);
  box-shadow: 0 6px 24px rgba(3,98,76,0.45);
}
.btn-modal-submit:active { transform: scale(0.985); }

/* Name display in results headline */
.lead-name-display {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: 0.375rem;
  font-weight: 500;
}

@media (max-width: 500px) {
  .lead-modal-fields { grid-template-columns: 1fr; }
  .lead-modal-title { font-size: 1.25rem; }
}

.lead-name-greeting {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #03624C;
  margin-bottom: 0.375rem;
}