/* PermaTech Global Styles */

:root {
  --navy: #1a2744;
  --navy-dark: #111b33;
  --offwhite: #f8f6f1;
  --grey: #e8e4dc;
  --grey-mid: #c8c2b8;
  --gold: #c9a84c;
  --text: #1a1a1a;
  --text-light: #555;
  --font-serif: Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --max-width: 1100px;
  --section-pad: 5rem 1.5rem;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--offwhite);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  line-height: 1.25;
  font-weight: normal;
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.35rem); }

p { margin-bottom: 1.2rem; }
p:last-child { margin-bottom: 0; }

a { color: var(--navy); text-decoration: underline; }
a:hover { color: var(--gold); }

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: var(--section-pad);
}

/* Navigation */
nav {
  background: var(--navy);
  padding: 1.2rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--offwhite);
  text-decoration: none;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.nav-logo:hover { color: var(--gold); }

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--grey);
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: color 0.2s;
}

.nav-links a:hover { color: var(--gold); }

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.85rem 2rem;
  border-radius: 2px;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  text-decoration: none;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--gold);
  color: var(--navy-dark);
  font-weight: 600;
}

.btn-primary:hover {
  background: #b8932a;
  color: var(--navy-dark);
}

.btn-secondary {
  background: transparent;
  color: var(--offwhite);
  border: 1px solid rgba(255,255,255,0.4);
}

.btn-secondary:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.btn-outline {
  background: transparent;
  color: var(--navy);
  border: 1px solid var(--navy);
}

.btn-outline:hover {
  background: var(--navy);
  color: var(--offwhite);
}

/* Hero */
.hero {
  background: var(--navy);
  color: var(--offwhite);
  padding: 6rem 1.5rem;
}

.hero-inner {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  margin-bottom: 1.5rem;
  color: var(--offwhite);
}

.hero p {
  font-size: 1.15rem;
  color: var(--grey);
  margin-bottom: 2.5rem;
  max-width: 640px;
}

/* Section backgrounds */
.bg-offwhite { background: var(--offwhite); }
.bg-grey { background: var(--grey); }
.bg-navy { background: var(--navy); color: var(--offwhite); }
.bg-navy h2, .bg-navy h3 { color: var(--offwhite); }
.bg-navy p { color: var(--grey); }

/* Section headings */
.section-heading {
  text-align: center;
  margin-bottom: 3rem;
}

.section-heading h2 {
  margin-bottom: 0.75rem;
}

.section-heading p {
  color: var(--text-light);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

.bg-navy .section-heading p { color: var(--grey-mid); }

/* Three-column grid */
.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.three-col h3 {
  margin-bottom: 1rem;
  color: var(--navy);
}

/* Callout box */
.callout {
  border-left: 4px solid var(--gold);
  padding: 1.5rem 2rem;
  background: rgba(255,255,255,0.5);
  margin: 2rem 0;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

.callout strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
  color: var(--navy);
}

/* CTA section */
.cta-section {
  text-align: center;
  padding: var(--section-pad);
}

.cta-section h2 {
  margin-bottom: 1rem;
}

.cta-section p {
  max-width: 580px;
  margin: 0 auto 2rem;
}

.cta-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Comparison blocks */
.comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  max-width: var(--max-width);
  margin: 2rem auto;
}

.comparison-block {
  padding: 1.5rem;
  background: var(--offwhite);
  border-radius: 2px;
}

.comparison-block h3 {
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

.comparison-block.highlight {
  background: var(--navy);
  color: var(--offwhite);
}

.comparison-block.highlight h3 {
  color: var(--gold);
}

.comparison-block.highlight p {
  color: var(--grey);
}

/* Criteria list */
.criteria-list {
  list-style: none;
  max-width: 680px;
  margin: 0 auto;
}

.criteria-list li {
  padding: 1rem 0 1rem 1.5rem;
  border-bottom: 1px solid var(--grey-mid);
  position: relative;
}

.criteria-list li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--gold);
  font-weight: bold;
}

.criteria-list li strong {
  display: block;
  margin-bottom: 0.2rem;
  font-family: var(--font-serif);
}

/* Process steps */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.step {
  text-align: center;
}

.step-number {
  width: 3rem;
  height: 3rem;
  background: var(--navy);
  color: var(--offwhite);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.2rem;
  margin: 0 auto 1rem;
}

.bg-grey .step-number {
  background: var(--navy);
}

.step h3 {
  margin-bottom: 0.5rem;
}

/* FAQ */
details {
  border-bottom: 1px solid var(--grey-mid);
}

details summary {
  padding: 1.2rem 0;
  cursor: pointer;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

details summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--gold);
  flex-shrink: 0;
}

details[open] summary::after {
  content: "−";
}

details summary::-webkit-details-marker { display: none; }

.faq-answer {
  padding: 0 0 1.2rem;
  color: var(--text-light);
  max-width: 720px;
}

.faq-container {
  max-width: 760px;
  margin: 0 auto;
}

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

.form-group label {
  display: block;
  margin-bottom: 0.4rem;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--navy);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--grey-mid);
  border-radius: 2px;
  font-family: var(--font-sans);
  font-size: 1rem;
  background: white;
  color: var(--text);
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--navy);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.form-divider {
  text-align: center;
  color: var(--text-light);
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

/* Footer */
footer {
  background: var(--navy-dark);
  color: var(--grey-mid);
  padding: 2rem 1.5rem;
  text-align: center;
  font-size: 0.9rem;
}

footer a {
  color: var(--grey-mid);
}

footer a:hover { color: var(--gold); }

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Prose sections */
.prose {
  max-width: 720px;
  margin: 0 auto;
}

.prose h2 {
  margin-bottom: 1.5rem;
}

.signed {
  margin-top: 2rem;
  font-style: italic;
  color: var(--grey-mid);
}

/* Responsive */
@media (max-width: 768px) {
  :root {
    --section-pad: 3rem 1.25rem;
  }

  .three-col {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .nav-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
  }

  .nav-links {
    gap: 1.25rem;
  }

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

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

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

@media (max-width: 480px) {
  .steps {
    grid-template-columns: 1fr;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
}