:root {
  color-scheme: dark;
  color-scheme: light;
  --bg: #ffffff;
  --bg-alt: #f6f7f9;
  --panel: rgba(255, 255, 255, 0.98);
  --panel-strong: rgba(255, 255, 255, 1);
  --border: rgba(60, 64, 67, 0.08);
  --border-strong: rgba(60, 64, 67, 0.14);
  --text: #202124;
  --muted: #5f6368;
  --soft: #3c4043;
  --primary: #1a73e8;
  --primary-strong: #1558c7;
  --primary-soft: rgba(26, 115, 232, 0.08);
  --success: #188038;
  --danger: #ea4335;
  --shadow: 0 8px 28px rgba(60, 64, 67, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont,
    sans-serif;
  color: var(--text);
  background: var(--bg-alt);
}

button,
input,
select,
textarea {
  font: inherit;
}

.page-shell {
  position: relative;
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 56px;
  display: grid;
  gap: 24px;
}

.hero,
.dashboard {
  position: relative;
  z-index: 1;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.95fr);
  gap: 20px;
  align-items: stretch;
}

.hero-copy,
.hero-stats,
.panel {
  border: 1px solid var(--border);
  background: var(--panel);
  backdrop-filter: blur(22px);
  box-shadow: var(--shadow);
}

.hero-copy {
  border-radius: 12px;
  padding: 28px;
  overflow: hidden;
  background: var(--panel-strong);
}

.eyebrow,
.section-kicker,
.stat-label,
.insight-card span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.72rem;
  color: var(--primary);
}

.hero-copy h1,
.section-head h2 {
  margin: 0;
  letter-spacing: -0.04em;
}

.hero-copy h1 {
  margin-top: 6px;
  max-width: 36ch;
  font-size: 1.4rem;
  line-height: 1.12;
}

.hero-copy p {
  margin: 18px 0 0;
  max-width: 62ch;
  color: var(--soft);
  font-size: 1.03rem;
  line-height: 1.7;
}

.hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.hero-pills span {
  border: 1px solid rgba(151, 190, 255, 0.18);
  border-radius: 999px;
  padding: 10px 14px;
  color: var(--soft);
  background: rgba(255, 255, 255, 0.03);
}

.hero-stats {
  border-radius: 28px;
  padding: 18px;
  display: grid;
  gap: 14px;
  align-content: start;
}

.stat-card,
.insight-card,
.summary-banner,
.result,
.cost-driver,
.field input,
.field select,
.field textarea {
  border: 1px solid var(--border);
  background: var(--panel);
}

.stat-card {
  border-radius: 12px;
  padding: 16px;
}

.stat-card strong,
.insight-card strong {
  display: block;
  margin-top: 8px;
  font-size: 1.15rem;
  color: var(--text);
}

.stat-card p,
.insight-card p {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.dashboard {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.85fr);
  gap: 24px;
}

.panel {
  border-radius: 12px;
  padding: 20px;
}

.section-head {
  display: grid;
  gap: 10px;
  margin-bottom: 22px;
}

.section-head h2 {
  font-size: clamp(1.55rem, 2.4vw, 2rem);
}

.section-head p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.field-full {
  grid-column: 1 / -1;
}

.field {
  display: grid;
  gap: 10px;
}

.field label {
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
}

.field-help {
  color: var(--muted);
  font-size: 0.89rem;
  line-height: 1.5;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border-radius: 8px;
  color: var(--text);
  outline: none;
  transition: border-color 160ms ease, transform 160ms ease,
    box-shadow 160ms ease, background-color 160ms ease;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--border-strong);
  box-shadow: 0 0 0 4px var(--primary-soft);
}

.field input,
.field select {
  min-height: 54px;
  padding: 0 16px;
}

.field textarea {
  min-height: 160px;
  resize: vertical;
  padding: 12px;
  line-height: 1.5;
}

.field textarea::placeholder,
.field input::placeholder {
  color: rgba(199, 211, 234, 0.55);
}

.summary-banner {
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--muted);
  line-height: 1.4;
}

.summary-banner.subtle {
  background: rgba(255, 255, 255, 0.04);
}

.ghost-button,
.primary-button,
.secondary-button {
  width: fit-content;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: transform 140ms ease, box-shadow 140ms ease,
    border-color 140ms ease, background-color 140ms ease;
}

.ghost-button:hover,
.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-1px);
}

.ghost-button {
  color: var(--text);
  background: transparent;
  border-color: var(--border);
}

.ghost-button:hover {
  background: rgba(255, 255, 255, 0.07);
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.primary-button {
  color: #fff;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-strong) 100%);
  box-shadow: 0 8px 28px rgba(26, 115, 232, 0.12);
}

.secondary-button {
  color: var(--soft);
  background: transparent;
  border-color: var(--border);
}

.secondary-button:hover {
  background: rgba(60,64,67,0.02);
}

.results-panel {
  display: grid;
  align-content: start;
  gap: 18px;
}

.result-stack {
  display: grid;
  gap: 14px;
}

.result {
  display: none;
  border-radius: 8px;
  padding: 14px;
  white-space: pre-line;
  color: var(--text);
  line-height: 1.6;
  background: var(--panel-strong);
}

.result::before {
  content: "Result";
  display: block;
  margin-bottom: 10px;
  color: var(--primary);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.insight-grid {
  display: grid;
  gap: 14px;
}

.insight-card {
  border-radius: 22px;
  padding: 18px;
}

.driver-panel {
  display: grid;
  gap: 20px;
}

.cost-drivers {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.cost-driver {
  border-radius: 8px;
  padding: 12px;
  background: var(--panel);
  transition: transform 140ms ease, border-color 140ms ease,
    box-shadow 140ms ease, background-color 140ms ease;
}

.cost-driver:hover {
  transform: translateY(-2px);
  border-color: rgba(104, 168, 255, 0.25);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.18);
}

.cost-driver.selected {
  border-color: rgba(24, 128, 56, 0.28);
  background: rgba(24, 128, 56, 0.04);
}

.cost-driver > label:first-child {
  display: block;
  margin-bottom: 12px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
}

.cost-driver .driver-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 8px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--soft);
  background: transparent;
  cursor: pointer;
}

.cost-driver .driver-option span {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 1 1 auto;
}

.cost-driver .driver-option span::before {
  content: "";
  width: 11px;
  height: 11px;
  flex: 0 0 11px;
  border-radius: 999px;
  border: 2px solid rgba(199, 211, 234, 0.35);
  box-shadow: inset 0 0 0 2px transparent;
  transition: border-color 180ms ease, box-shadow 180ms ease,
    background-color 180ms ease;
}

.cost-driver .driver-option strong {
  margin-left: auto;
  color: var(--text);
}

.cost-driver .driver-option input[type="radio"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.cost-driver .driver-option input[type="radio"]:checked + span {
  color: var(--text);
}

.cost-driver .driver-option input[type="radio"]:checked ~ strong {
  color: var(--text);
}

.cost-driver .driver-option input[type="radio"]:checked + span::before {
  border-color: var(--success);
  background: var(--success);
  box-shadow: inset 0 0 0 3px rgba(10, 20, 36, 0.9);
}

.cost-driver .driver-option:hover {
  border-color: rgba(104, 168, 255, 0.24);
}

.toast {
  visibility: hidden;
  min-width: 220px;
  max-width: min(92vw, 520px);
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%) translateY(8px);
  padding: 12px 16px;
  border-radius: 999px;
  color: #ffffff;
  background: var(--primary);
  box-shadow: 0 8px 28px rgba(26, 115, 232, 0.12);
  opacity: 0;
  transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
  z-index: 20;
  text-align: center;
  font-weight: 700;
}

.toast.show {
  visibility: visible;
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 1024px) {
  .hero,
  .dashboard {
    grid-template-columns: 1fr;
  }

  .hero-copy h1 {
    max-width: 14ch;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 20px, 1180px);
    padding: 20px 0 40px;
  }

  .hero-copy,
  .hero-stats,
  .panel {
    border-radius: 24px;
    padding: 20px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .action-row {
    flex-direction: column;
  }

  .ghost-button,
  .primary-button,
  .secondary-button {
    width: 100%;
    justify-content: center;
  }

  .cost-drivers {
    grid-template-columns: 1fr;
  }
}

/* Typography & micro-typography */
:root {
  --font-sans: Inter, Roboto, 'Helvetica Neue', Arial, sans-serif;
  --lead-size: 1.03rem;
  --base-line-height: 1.55;
  --heading-line-height: 1.02;
}

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: var(--base-line-height);
  color: var(--text);
}

/* Headings */
h1 {
  font-weight: 800;
  font-size: clamp(2.1rem, 4.2vw, 3.2rem);
  line-height: var(--heading-line-height);
  margin: 0 0 0.3rem 0;
  color: var(--text);
  letter-spacing: -0.02em;
}

h2 {
  font-weight: 700;
  font-size: clamp(1.25rem, 2.1vw, 1.6rem);
  margin: 0;
  color: var(--text);
}

h3 {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
}

.eyebrow,
.section-kicker {
  color: var(--primary);
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
}

.hero-copy p,
.section-head p {
  font-size: var(--lead-size);
  color: var(--muted);
  margin-top: 0.6rem;
}

/* Lead text and muted */
.lead { font-size: var(--lead-size); color: var(--muted); }
.muted { color: var(--muted); }

/* Metrics and microcopy */
.stat-card strong {
  font-size: 1.08rem;
}

.metric {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.metric .value {
  font-weight: 800;
  font-size: 1.6rem;
  color: var(--text);
}
.metric .unit { color: var(--muted); font-size: 0.9rem; }

/* Cards & subtle motion */
.panel,
.stat-card,
.insight-card,
.cost-driver {
  transition: transform 220ms cubic-bezier(.2,.9,.3,1), box-shadow 220ms ease, border-color 220ms ease;
}
.panel:hover, .stat-card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(60,64,67,0.08); }

/* Reveal animations */
.reveal-up { transform: translateY(10px); opacity: 0; transition: transform 360ms ease, opacity 360ms ease; }
.reveal-up.visible { transform: translateY(0); opacity: 1; }

@keyframes floaty { 0% { transform: translateY(0);} 50% { transform: translateY(-6px);} 100% { transform: translateY(0);} }
.floaty { animation: floaty 5s ease-in-out infinite; }

/* Link / button microcopy */
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Small helpers */
.caption { font-size: 0.82rem; color: var(--muted); }