/* Eco Warrior Tips — main stylesheet
   Aesthetic: clean, credible, sage green + cream. Corporate-trust > crunchy-hippie.
   Mobile-first. Minimal CSS, no framework. */

:root {
  --color-bg: #FAF9F5;
  --color-bg-alt: #F2EFE7;
  --color-surface: #FFFFFF;
  --color-ink: #1F2A1F;
  --color-ink-muted: #5A6656;
  --color-ink-light: #8A9385;
  --color-accent: #2F6A3D;
  --color-accent-dark: #1F4A2A;
  --color-accent-light: #E6F0E8;
  --color-border: #E0DDD1;
  --color-warn: #B8861B;
  --color-success: #2F6A3D;
  --color-danger: #A43D26;

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-serif: Georgia, 'Times New Roman', serif;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  --max-width: 1100px;
  --max-width-narrow: 720px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--color-ink);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--color-accent-dark);
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.25;
  margin: 0 0 0.5em;
  color: var(--color-ink);
}

h1 { font-size: clamp(2rem, 4vw, 2.75rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: 2em; }
h3 { font-size: 1.25rem; margin-top: 1.5em; }

p { margin: 0 0 1em; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.container-narrow {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* HEADER */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 0;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-logo {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.site-logo-mark {
  width: 28px;
  height: 28px;
  background: var(--color-accent);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 15px;
  font-weight: 700;
  font-family: var(--font-sans);
}

.site-nav {
  display: flex;
  gap: 1.5rem;
  font-size: 15px;
}

.site-nav a {
  color: var(--color-ink-muted);
  text-decoration: none;
  font-weight: 500;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-accent);
}

@media (max-width: 600px) {
  .site-nav {
    gap: 1rem;
    font-size: 14px;
  }
}

/* FOOTER */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 0 2rem;
  margin-top: 4rem;
  font-size: 14px;
  color: var(--color-ink-muted);
}

.site-footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.site-footer h4 {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-ink);
  margin-bottom: 0.75rem;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-footer li {
  margin-bottom: 0.5rem;
}

.site-footer a {
  color: var(--color-ink-muted);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.site-footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 1.5rem;
  font-size: 13px;
  color: var(--color-ink-light);
}

/* HERO */
.hero {
  padding: 4rem 0 3rem;
  text-align: center;
}

.hero h1 {
  margin-bottom: 0.5rem;
}

.hero .lede {
  font-size: 1.25rem;
  color: var(--color-ink-muted);
  max-width: 640px;
  margin: 0 auto 2rem;
}

/* CARDS */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: border-color 0.2s, transform 0.2s;
  text-decoration: none;
  color: inherit;
  display: block;
}

a.card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.card h3 {
  margin-top: 0;
  color: var(--color-ink);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}

.card-meta {
  font-size: 13px;
  color: var(--color-ink-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.card-cta {
  display: inline-block;
  margin-top: 1rem;
  color: var(--color-accent);
  font-weight: 500;
  font-size: 15px;
}

/* BUTTONS */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: var(--color-accent);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 16px;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

.btn:hover {
  background: var(--color-accent-dark);
  color: white;
}

.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.btn-secondary:hover {
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
}

/* CALCULATOR SPECIFIC */
.calc-wrap {
  padding: 2rem 0 3rem;
}

.calc-inputs {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

.calc-input-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}

.calc-input-group label {
  display: block;
  font-size: 14px;
  color: var(--color-ink-muted);
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.calc-input-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.calc-input-row input[type="range"] {
  flex: 1;
  accent-color: var(--color-accent);
}

.calc-input-value {
  font-size: 15px;
  font-weight: 600;
  min-width: 80px;
  text-align: right;
  color: var(--color-ink);
}

.calc-input-group select {
  width: 100%;
  padding: 0.5rem 0.75rem;
  font-size: 15px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-ink);
}

.calc-results {
  background: var(--color-accent-light);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

.calc-results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
}

.calc-stat-label {
  font-size: 13px;
  color: var(--color-ink-muted);
  margin-bottom: 0.25rem;
}

.calc-stat-value {
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.1;
  color: var(--color-ink);
  font-family: var(--font-serif);
}

.calc-stat-value.positive { color: var(--color-success); }
.calc-stat-value.negative { color: var(--color-danger); }

.calc-chart {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
}

.calc-chart-inner {
  position: relative;
  height: 280px;
}

.calc-assumptions {
  font-size: 13px;
  color: var(--color-ink-light);
  line-height: 1.6;
  padding: 1rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  margin-bottom: 2rem;
}

/* PRODUCT RECOMMENDATIONS */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
}

.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
}

.product-card h4 {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  margin: 0 0 0.25rem;
}

.product-price {
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--color-accent);
  font-family: var(--font-serif);
  margin-bottom: 0.5rem;
}

.product-description {
  font-size: 14px;
  color: var(--color-ink-muted);
  flex: 1;
  margin-bottom: 0.5rem;
}

.product-best-for {
  font-size: 13px;
  color: var(--color-ink-light);
  font-style: italic;
  margin-bottom: 1rem;
}

.product-cta {
  display: block;
  text-align: center;
  padding: 0.6rem 1rem;
  background: var(--color-accent);
  color: white;
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 14px;
}

.product-cta:hover {
  background: var(--color-accent-dark);
  color: white;
}

/* DISCLOSURE CALLOUT */
.disclosure-inline {
  font-size: 13px;
  color: var(--color-ink-light);
  padding: 0.75rem 1rem;
  background: var(--color-bg-alt);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  margin: 1.5rem 0;
}

/* ARTICLE CONTENT */
.prose {
  max-width: 680px;
  margin: 0 auto;
}

.prose h2 {
  margin-top: 2.5em;
}

.prose ul, .prose ol {
  padding-left: 1.5em;
  margin-bottom: 1em;
}

.prose li {
  margin-bottom: 0.5em;
}

/* UTILITIES */
.mt-0 { margin-top: 0; }
.mt-2 { margin-top: 2rem; }
.text-center { text-align: center; }
.muted { color: var(--color-ink-muted); }