/* ============================================
   SensorToGo Design System
   Premium Operator Instrument Aesthetic
   ============================================ */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600&family=Playfair+Display:wght@400;500&family=JetBrains+Mono:wght@400;500&display=swap');

/* --- CSS Variables --- */
:root {
  --color-primary: #251c4a;
  --color-primary-light: #3b3560;
  --color-primary-lighter: #f0eef5;
  
  --color-bg: #ffffff;
  --color-bg-soft: #f8f7fa;
  --color-bg-softer: #faf9fc;
  
  --color-text: #1a1a1a;
  --color-text-secondary: #555555;
  --color-text-tertiary: #888888;
  
  --color-border: #e5e5e5;
  --color-border-light: #f0f0f0;
  
  --color-success: #10B981;
  --color-success-light: #e8f5e9;
  --color-success-dark: #2e7d32;
  
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;
  
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 80px;
  
  --max-width: 1200px;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }

/* --- Typography --- */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-primary);
}

h1 { font-size: clamp(32px, 5vw, 48px); letter-spacing: -0.5px; }
h2 { font-size: clamp(24px, 4vw, 36px); letter-spacing: -0.3px; }
h3 { font-size: 20px; }

p { color: var(--color-text-secondary); line-height: 1.7; }

.label {
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-primary);
  opacity: 0.5;
}

.mono { font-family: var(--font-mono); }

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-2xl);
}

@media (max-width: 768px) {
  .container { padding: 0 var(--space-lg); }
}

.grid-editorial {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-3xl);
}

@media (max-width: 900px) {
  .grid-editorial {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

.section { padding: var(--space-3xl) 0; }
.section--soft { background: var(--color-bg-soft); }

/* --- Navigation --- */
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg) var(--space-2xl);
  border-bottom: 1px solid var(--color-border-light);
  position: sticky;
  top: 0;
  background: var(--color-bg);
  z-index: 100;
}

.nav__logo {
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.5px;
  color: var(--color-primary);
  text-transform: uppercase;
}

.nav__links {
  display: flex;
  gap: var(--space-xl);
  align-items: center;
  list-style: none;
}

.nav__link {
  font-size: 14px;
  color: var(--color-text-secondary);
  transition: color 0.2s ease;
}

.nav__link:hover { color: var(--color-primary); }

.nav__dropdown { position: relative; }

.nav__dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: var(--space-sm);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  margin-top: var(--space-sm);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.nav__dropdown:hover .nav__dropdown-menu {
  opacity: 1;
  visibility: visible;
}

.nav__dropdown-item {
  display: block;
  padding: var(--space-sm) var(--space-md);
  font-size: 14px;
  color: var(--color-text-secondary);
  border-radius: 4px;
}

.nav__dropdown-item:hover {
  background: var(--color-bg-soft);
  color: var(--color-primary);
}

.nav__mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  font-size: 24px;
}

@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-md);
  }
  .nav__mobile-toggle { display: block; }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font-body);
  letter-spacing: 0.3px;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-light); }

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn--outline:hover { background: var(--color-primary); color: #fff; }

.btn--small {
  padding: 10px 20px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn--full { width: 100%; }

/* --- Hero Section --- */
.hero { padding: var(--space-3xl) 0; }

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: var(--space-3xl);
  row-gap: var(--space-xl);
  align-items: start;
}

.hero__intro { grid-column: 1; grid-row: 1; }
.hero__order { grid-column: 1; grid-row: 2; }
.hero__grid .device-showcase { grid-column: 2; grid-row: 2; }

@media (max-width: 900px) {
  .hero__grid { grid-template-columns: 1fr; row-gap: var(--space-2xl); }
  .hero__intro,
  .hero__order,
  .hero__grid .device-showcase {
    grid-column: 1;
    grid-row: auto;
  }
}

.hero__intro h1 { margin-bottom: var(--space-lg); }
.hero__intro p { font-size: 17px; }

.hero__cta {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.hero__cta-note { font-size: 14px; color: var(--color-text-tertiary); }

.hero__specs {
  display: flex;
  gap: var(--space-xl);
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border-light);
  flex-wrap: wrap;
}

.hero__spec-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-xs);
}

.hero__spec-value { font-size: 13px; color: var(--color-primary); }

/* --- Device Visual --- */
.device-showcase {
  background: var(--color-bg-soft);
  border-radius: 12px;
  padding: var(--space-2xl);
}

.device-showcase__variants {
  display: flex;
  gap: var(--space-2xl);
  justify-content: center;
  align-items: flex-end;
}

.device-variant { text-align: center; }
.device-variant__image { margin-bottom: var(--space-md); position: relative; }

.device-solar__panel {
  width: 80px;
  height: 40px;
  background: var(--color-primary-light);
  border-radius: 4px 4px 0 0;
  margin: 0 auto;
}

.device-solar__body, .device-wall__body {
  width: 70px;
  height: 100px;
  background: var(--color-primary);
  border-radius: 0 0 8px 8px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 12px 24px rgba(37, 28, 74, 0.15);
}

.device-wall__body { border-radius: 8px; }

.device__sensor {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
}

.device-wall__cord {
  position: absolute;
  bottom: 8px;
  right: -12px;
  width: 20px;
  height: 8px;
  background: var(--color-primary-light);
  border-radius: 2px;
}

.device-variant__name {
  font-size: 12px;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 2px;
}

.device-variant__desc { font-size: 11px; color: var(--color-text-tertiary); }

.device-showcase__specs {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-tertiary);
}

/* --- Live Strip --- */
.live-strip {
  padding: var(--space-lg) 0;
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.live-strip__content {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  font-size: 13px;
  color: var(--color-text-secondary);
  flex-wrap: wrap;
}

.live-strip__indicator { display: flex; align-items: center; gap: var(--space-sm); }

.live-strip__dot {
  width: 6px;
  height: 6px;
  background: var(--color-success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.live-strip__reading { font-family: var(--font-mono); color: var(--color-primary); }
.live-strip__divider { width: 1px; height: 16px; background: var(--color-border); }

/* --- Product Card --- */
.product-card {
  background: var(--color-bg-soft);
  border-radius: 8px;
  padding: var(--space-lg);
}

.product-card__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.product-card__name { font-size: 13px; font-weight: 500; color: var(--color-primary); }
.product-card__sensors { font-size: 11px; color: var(--color-text-tertiary); }

.product-card__field { margin-bottom: var(--space-lg); }

.product-card__label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-tertiary);
  display: block;
  margin-bottom: var(--space-sm);
}

.product-card__select {
  width: 100%;
  padding: 12px 16px;
  font-size: 14px;
  font-family: var(--font-body);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-bg);
  color: var(--color-primary);
  appearance: none;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}

.product-card__qty { display: flex; align-items: center; gap: var(--space-md); }

.product-card__qty-btn {
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-bg);
  font-size: 18px;
  color: var(--color-primary);
  cursor: pointer;
}

.product-card__qty-btn:hover { background: var(--color-bg-soft); }

.product-card__qty-value {
  font-size: 16px;
  font-weight: 500;
  color: var(--color-primary);
  min-width: 24px;
  text-align: center;
}

.product-card__pricing {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-md);
  margin-bottom: var(--space-lg);
}

.product-card__price-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: var(--space-sm);
}

.product-card__price-label { font-size: 14px; color: var(--color-text-secondary); }
.product-card__price-value { font-size: 14px; font-weight: 500; color: var(--color-primary); }
.product-card__note { font-size: 12px; color: var(--color-text-tertiary); margin-top: var(--space-sm); }

/* --- Portal Preview --- */
.portal-preview {
  background: var(--color-bg-soft);
  border-radius: 8px;
  padding: var(--space-lg);
  border: 1px solid var(--color-border-light);
}

.portal-preview__cards {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.portal-preview__card {
  background: var(--color-bg);
  border-radius: 6px;
  padding: var(--space-md) var(--space-lg);
  flex: 1;
  border: 1px solid var(--color-border-light);
}

.portal-preview__card-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-xs);
}

.portal-preview__card-value {
  font-size: 24px;
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--color-primary);
}

.portal-preview__card-unit { font-size: 14px; opacity: 0.6; }

.portal-preview__chart {
  background: var(--color-bg);
  border-radius: 6px;
  padding: var(--space-lg);
  height: 100px;
  border: 1px solid var(--color-border-light);
  display: flex;
  align-items: flex-end;
  gap: 4px;
}

.portal-preview__bar { flex: 1; background: #e8e5f0; border-radius: 2px; }
.portal-preview__bar--active { background: var(--color-primary); }

.portal-preview__footer {
  display: flex;
  justify-content: space-between;
  margin-top: var(--space-md);
  font-size: 12px;
  color: var(--color-text-tertiary);
  flex-wrap: wrap;
  gap: var(--space-sm);
}

@media (max-width: 600px) {
  .portal-preview__cards { flex-direction: column; }
}

/* --- Applications Grid --- */
.applications-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
}

@media (max-width: 700px) {
  .applications-grid { grid-template-columns: 1fr; }
}

.application-card {
  background: var(--color-bg);
  padding: var(--space-xl);
  display: block;
  transition: background 0.2s ease;
}

.application-card:hover { background: var(--color-bg-softer); }

.application-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-sm);
  gap: var(--space-sm);
}

.application-card__title { font-size: 14px; font-weight: 500; color: var(--color-primary); }

.application-card__desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-md);
}

.application-card__action { font-size: 12px; color: var(--color-primary); opacity: 0.6; }

/* --- Badges --- */
.badge {
  font-size: 10px;
  padding: 3px 8px;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
  white-space: nowrap;
}

.badge--solar { background: var(--color-primary-lighter); color: var(--color-primary); }
.badge--wall { background: var(--color-primary-lighter); color: var(--color-primary); }
.badge--research { background: var(--color-success-light); color: var(--color-success-dark); }

/* --- Research Callout --- */
.research-callout {
  background: var(--color-bg-soft);
  border-radius: 8px;
  padding: var(--space-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.research-callout__title {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xs);
}

.research-callout__name { font-size: 14px; font-weight: 500; color: var(--color-primary); }
.research-callout__desc { font-size: 13px; color: var(--color-text-secondary); }
.research-callout__link { font-size: 13px; color: var(--color-primary); white-space: nowrap; }
.research-callout__link:hover { text-decoration: underline; }

/* --- Founders Section --- */
.founders { font-size: 16px; line-height: 1.7; color: var(--color-text-secondary); }
.founders strong { color: var(--color-primary); font-weight: 500; }

/* --- CTA Banner --- */
.cta-banner {
  padding: var(--space-2xl) 0;
  background: var(--color-bg-softer);
  border-top: 1px solid var(--color-border-light);
}

.cta-banner__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-lg);
}

.cta-banner__title {
  font-size: 18px;
  font-family: var(--font-display);
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.cta-banner__subtitle { font-size: 14px; color: var(--color-text-tertiary); }

/* --- Footer --- */
.footer { padding: var(--space-3xl) 0; border-top: 1px solid var(--color-border-light); }

.footer__grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-2xl);
}

@media (max-width: 768px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: var(--space-xl); }
}

@media (max-width: 500px) {
  .footer__grid { grid-template-columns: 1fr; }
}

.footer__brand {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: var(--space-md);
}

.footer__tagline { font-size: 14px; color: var(--color-text-tertiary); max-width: 280px; }

.footer__heading {
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-md);
}

.footer__links { list-style: none; }

.footer__link {
  display: block;
  font-size: 14px;
  color: var(--color-text-secondary);
  padding: var(--space-xs) 0;
}

.footer__link:hover { color: var(--color-primary); }

.footer__bottom {
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border-light);
  font-size: 13px;
  color: var(--color-text-tertiary);
}

/* --- Vertical Pages --- */
.vertical-hero { padding: var(--space-4xl) 0 var(--space-3xl); }
.vertical-hero__badge { margin-bottom: var(--space-md); }
.vertical-hero h1 { max-width: 700px; margin-bottom: var(--space-lg); }
.vertical-hero p { font-size: 18px; max-width: 600px; margin-bottom: var(--space-xl); }

/* --- Feature List --- */
.features-list { list-style: none; }

.features-list__item {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.features-list__item:last-child { border-bottom: none; }

.features-list__check {
  width: 20px;
  height: 20px;
  background: var(--color-success-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.features-list__check::after {
  content: '✓';
  font-size: 11px;
  color: var(--color-success-dark);
}

.features-list__text { font-size: 15px; color: var(--color-text-secondary); }

/* --- Success Story --- */
.success-story {
  background: var(--color-bg-soft);
  border-radius: 8px;
  padding: var(--space-xl);
  border-left: 3px solid var(--color-success);
}

.success-story__quote {
  font-size: 17px;
  font-style: italic;
  color: var(--color-text);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.success-story__outcome { font-size: 14px; font-weight: 500; color: var(--color-success-dark); }

/* --- Specs Table --- */
.specs-table { width: 100%; border-collapse: collapse; }

.specs-table th, .specs-table td {
  padding: var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border-light);
}

.specs-table th {
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-tertiary);
  background: var(--color-bg-soft);
}

.specs-table td { font-size: 14px; color: var(--color-text-secondary); }
.specs-table td:first-child { font-weight: 500; color: var(--color-primary); }

/* --- Trust Strip --- */
.trust-strip {
  padding: var(--space-lg) 0;
  background: var(--color-bg-soft);
  border-top: 1px solid var(--color-border-light);
  text-align: center;
}

.trust-strip__content {
  display: flex;
  justify-content: center;
  gap: var(--space-2xl);
  font-size: 12px;
  color: var(--color-text-tertiary);
  flex-wrap: wrap;
}

/* --- Pricing Page --- */
.pricing-hero { text-align: center; padding: var(--space-4xl) 0 var(--space-2xl); }
.pricing-hero h1 { margin-bottom: var(--space-md); }
.pricing-card { max-width: 480px; margin: 0 auto var(--space-3xl); }
.pricing-faq { max-width: 700px; margin: 0 auto; }

.faq-item { border-bottom: 1px solid var(--color-border-light); padding: var(--space-lg) 0; }
.faq-item__question { font-size: 15px; font-weight: 500; color: var(--color-primary); margin-bottom: var(--space-sm); }
.faq-item__answer { font-size: 14px; color: var(--color-text-secondary); line-height: 1.6; }

/* --- About Page --- */
.about-hero { padding: var(--space-4xl) 0; }
.about-hero h1 { max-width: 600px; margin-bottom: var(--space-xl); }

.founder-card {
  display: flex;
  gap: var(--space-xl);
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.founder-card:last-child { border-bottom: none; }

.founder-card__image {
  width: 120px;
  height: 120px;
  background: var(--color-bg-soft);
  border-radius: 8px;
  flex-shrink: 0;
}

.founder-card__name { font-size: 18px; font-weight: 500; color: var(--color-primary); margin-bottom: var(--space-xs); }
.founder-card__title { font-size: 13px; color: var(--color-text-tertiary); margin-bottom: var(--space-md); }
.founder-card__bio { font-size: 15px; color: var(--color-text-secondary); line-height: 1.6; }

@media (max-width: 600px) {
  .founder-card { flex-direction: column; gap: var(--space-lg); }
}

/* --- Live Dashboard Page --- */
.live-hero { padding: var(--space-3xl) 0; }

.live-embed {
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-xl);
}

.live-embed__placeholder { text-align: center; color: var(--color-text-tertiary); }
.live-context { text-align: center; font-size: 14px; color: var(--color-text-tertiary); }

/* --- Utility Classes --- */
.text-center { text-align: center; }
.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-2xl { margin-bottom: var(--space-2xl); }
.mb-3xl { margin-bottom: var(--space-3xl); }

/* --- Shopify Buy Button Overrides --- */
.shopify-buy__btn {
  background: var(--color-primary) !important;
  font-family: var(--font-body) !important;
  border-radius: 4px !important;
}