/* Window Light Finder — Theme CSS
   Botanical green aesthetic with visual sunlight gauges
   No external dependencies */
:root {
  /* Color palette (botanical green) */
  --bg-color: #F8F5F0;
  --primary-green: #5D7A4A;
  --primary-green-dark: #3E5430;
  --light-green: #8CB36E;
  --accent-gold: #D4AF37;
  --text-dark: #2C3328;
  --text-light: #FFFFFF;
  --border-color: #E0D8C8;
  --card-bg: #FFFFFF;
  
  /* Type scale */
  --font-heading: Georgia, "Times New Roman", Times, serif;
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  --font-mono: "Courier New", Courier, monospace;
  
  /* Spacing */
  --container-width: 720px;
  --spacing-unit: 20px;
  --border-radius: 8px;
  
  /* Typography scale (base 16px) */
  --type-h1: 2.67rem;  /* 40px */
  --type-h2: 2rem;     /* 32px */
  --type-h3: 1.5rem;   /* 24px */
  --type-body: 1rem;   /* 16px */
  --type-caption: 0.875rem; /* 14px */
  
  /* Light gauge colors */
  --light-low: #8CB36E;    /* green */
  --light-medium: #D4AF37; /* gold */
  --light-bright: #E97C38; /* orange */
  --light-direct: #E74C3C; /* red */
}

/* Reset & base styles */
* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--text-dark);
  font-family: var(--font-body);
  line-height: 1.6;
  min-height: 100vh;
}

/* Layout */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-unit);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  position: static;
  width: auto;
  height: auto;
  padding: 1rem;
  background: var(--primary-green);
  color: var(--text-light);
  border-radius: var(--border-radius);
  z-index: 1000;
}

/* Header */
.site-header {
  background-color: var(--primary-green);
  color: var(--text-light);
  padding: var(--spacing-unit) 0;
  box-shadow: 0 2px 8px rgba(62, 84, 48, 0.15);
}

.site-header .brand {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.site-header .brand a {
  color: var(--text-light);
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: var(--type-h2);
  font-weight: bold;
}

.site-header nav ul {
  display: flex;
  gap: 1rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-header nav a {
  color: var(--text-light);
  text-decoration: none;
  font-size: var(--type-caption);
  opacity: 0.9;
  transition: opacity 0.2s;
}

.site-header nav a:hover {
  opacity: 1;
}

/* Main content */
.main {
  padding: calc(var(--spacing-unit) * 2) 0;
}

.section-heading {
  font-family: var(--font-heading);
  font-size: var(--type-h2);
  color: var(--primary-green-dark);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-color);
}

.section-intro {
  font-size: var(--type-body);
  margin-bottom: 1.5rem;
}

/* Hero section */
.hero {
  text-align: center;
  padding: calc(var(--spacing-unit) * 3) 0;
  background: linear-gradient(180deg, rgba(93, 122, 74, 0.05) 0%, transparent 100%);
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: var(--type-h1);
  color: var(--primary-green-dark);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero p {
  font-size: var(--type-body);
  max-width: 600px;
  margin: 0 auto 1.5rem;
  color: var(--text-dark);
}

.btn-primary {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: var(--primary-green);
  color: var(--text-light);
  text-decoration: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: var(--type-body);
  border: none;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.1s;
}

.btn-primary:hover {
  background-color: var(--primary-green-dark);
}

.btn-primary:active {
  transform: translateY(1px);
}

/* How it works section */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.step-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  background-color: var(--primary-green);
  color: var(--text-light);
  border-radius: 50%;
  font-size: 1.5rem;
  font-weight: bold;
  margin-bottom: 1rem;
}

.step-card h3 {
  font-family: var(--font-heading);
  font-size: var(--type-h3);
  margin-bottom: 0.75rem;
  color: var(--primary-green-dark);
}

/* Calculator section */
.calculator-section {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.calculator {
  margin-bottom: 2rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  font-size: var(--type-body);
}

.form-select {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  font-size: var(--type-body);
  background-color: var(--card-bg);
}

.orientation-selector {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.orientation-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--card-bg);
  cursor: pointer;
  transition: all 0.2s;
}

.orientation-btn:hover {
  border-color: var(--primary-green);
}

.orientation-btn.active {
  border-color: var(--primary-green);
  background-color: rgba(93, 122, 74, 0.05);
}

.orientation-btn .compass-hint {
  font-size: 0.8rem;
  color: #666;
  font-family: var(--font-mono);
}

/* Sensor reading gauge */
.sensor-reading {
  background: linear-gradient(90deg, var(--light-low) 0%, var(--light-medium) 50%, var(--light-direct) 100%);
  border-radius: 4px;
  height: 4px;
  margin: 0.5rem 0;
}

.gauge-container {
  background-color: #e0e0e0;
  border-radius: 20px;
  height: 16px;
  overflow: hidden;
  margin-top: 0.5rem;
}

.gauge-fill {
  background: linear-gradient(90deg, var(--light-low) 0%, var(--light-medium) 50%, var(--light-direct) 100%);
  height: 100%;
  border-radius: 20px;
  transition: width 0.3s ease;
}

.lux-display {
  font-family: var(--font-mono);
  font-size: 2rem;
  color: var(--primary-green-dark);
  text-align: center;
  margin: 1rem 0;
}

.lux-display .lux-value {
  font-weight: bold;
}

.fallback-note {
  background-color: rgba(255, 255, 0, 0.1);
  border: 1px solid rgba(255, 255, 0, 0.3);
  border-radius: var(--border-radius);
  padding: 1rem;
  margin: 1rem 0;
  font-size: var(--type-caption);
}

.fallback-note strong {
  color: #856404;
}

/* Results card */
.results-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.results-card .light-level {
  font-family: var(--font-heading);
  font-size: var(--type-h3);
  color: var(--primary-green-dark);
  text-align: center;
  margin-bottom: 1rem;
}

.results-card .light-band-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: var(--primary-green);
  color: var(--text-light);
  border-radius: 4px;
  font-size: var(--type-caption);
  font-weight: 600;
}

.results-card .lux-range {
  font-family: var(--font-mono);
  color: #666;
  font-size: var(--type-caption);
  text-align: center;
  margin-bottom: 1.5rem;
}

.results-card .hours-estimate {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
  background-color: var(--bg-color);
  padding: 1rem;
  border-radius: var(--border-radius);
}

.hours-box {
  text-align: center;
}

.hours-box .label {
  font-size: var(--type-caption);
  color: #666;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.5rem;
}

.hours-box .value {
  font-family: var(--font-heading);
  font-size: var(--type-h3);
  color: var(--primary-green-dark);
}

/* Plant match cards */
.plant-matches {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.plant-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.25rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.plant-card .plant-name {
  font-family: var(--font-heading);
  font-size: var(--type-h3);
  color: var(--primary-green-dark);
  margin-bottom: 0.75rem;
}

.plant-card .sunlight-gauge {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.plant-card .sunlight-icon {
  width: 24px;
  height: 24px;
}

.plant-card .sunlight-icon svg {
  width: 100%;
  height: 100%;
}

.sun-icon {
  width: 24px;
  height: 24px;
  fill: var(--accent-gold);
}

.sun-icon path {
  transition: fill 0.3s ease;
}

.plant-card .sunlight-gauge .gauge-fill {
  background: linear-gradient(90deg, var(--light-low) 0%, var(--light-medium) 50%, var(--light-direct) 100%);
  width: 100%;
  height: 4px;
  border-radius: 2px;
}

.plant-card .plant-details {
  font-size: var(--type-caption);
  color: #666;
  line-height: 1.5;
}

.plant-card .plant-details strong {
  color: var(--primary-green-dark);
}

/* Reference section */
.table-section {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.table-section table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.table-section th,
.table-section td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.table-section th {
  background-color: rgba(93, 122, 74, 0.05);
  font-weight: 600;
  font-size: var(--type-caption);
  color: var(--primary-green-dark);
}

.table-section td {
  font-size: var(--type-caption);
}

.table-section .ref-tag {
  font-size: 0.75rem;
  color: #999;
  font-style: italic;
}

/* FAQ section */
.faq-section {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.faq-item {
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item summary {
  padding: 1rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--primary-green-dark);
  font-family: var(--font-heading);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.5rem;
  font-weight: bold;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item .faq-answer {
  padding: 0 1rem 1rem;
  color: var(--text-dark);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 2rem;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
}

.modal-content h2 {
  font-family: var(--font-heading);
  color: var(--primary-green-dark);
  margin-top: 0;
}

.modal-intro {
  font-size: var(--type-body);
  margin-bottom: 1.5rem;
}

.modal-actions {
  margin-top: 2rem;
  text-align: center;
}

/* Footer */
.site-footer {
  background-color: var(--primary-green-dark);
  color: var(--text-light);
  padding: 2rem 0;
  margin-top: 3rem;
}

.footer-content {
  text-align: center;
}

.footer-logo {
  font-family: var(--font-heading);
  font-size: var(--type-h2);
  margin-bottom: 0.5rem;
}

.footer-desc {
  font-size: var(--type-body);
  margin-bottom: 1rem;
  opacity: 0.9;
}

.disclaimer-text {
  font-size: var(--type-caption);
  line-height: 1.6;
  opacity: 0.8;
}

/* Responsive adjustments */
@media (max-width: 600px) {
  :root {
    --type-h1: 2rem;  /* 32px */
    --type-h2: 1.5rem; /* 24px */
    --spacing-unit: 16px;
  }
  
  .hero h1 {
    font-size: var(--type-h1);
  }
  
  .orientation-selector {
    grid-template-columns: 1fr;
  }
  
  .plant-matches {
    grid-template-columns: 1fr;
  }
}

/* Motion preferences */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}

/* Focus styles for accessibility */
:focus {
  outline: 2px solid var(--primary-green);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--primary-green);
  outline-offset: 2px;
}