/*
Theme Name: Root Camp
Theme URI: https://rootcamp.com
Author: Root Camp
Description: Single-page theme for Root Camp — genetic genealogical investigations to identify people at risk for rare, inheritable diseases.
Version: 1.0
License: GNU General Public License v2 or later
Text Domain: root-camp
*/

/* ==========================================================================
   CSS Variables
   ========================================================================== */
:root {
  --rc-color-bg: #0a0f14;
  --rc-color-surface: #111a22;
  --rc-color-surface-alt: #1a2632;
  --rc-color-primary: #2d7a5e;
  --rc-color-primary-light: #3d9a76;
  --rc-color-accent: #c9a227;
  --rc-color-text: #e8ecf0;
  --rc-color-text-muted: #8b9cad;
  --rc-font-heading: "DM Serif Display", "Georgia", serif;
  --rc-font-body: "Source Sans 3", "Segoe UI", sans-serif;
  --rc-max-width: 72rem;
  --rc-section-padding: clamp(3rem, 8vw, 6rem);
  --rc-nav-height: 4rem;
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--rc-font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--rc-color-text);
  background: var(--rc-color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--rc-color-primary-light); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ==========================================================================
   Navigation
   ========================================================================== */
.rc-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--rc-nav-height);
  background: rgba(10, 15, 20, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}
.rc-nav-inner {
  width: 100%;
  max-width: var(--rc-max-width);
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.rc-logo {
  font-family: var(--rc-font-heading);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--rc-color-text);
  letter-spacing: 0.02em;
}
.rc-logo span { color: var(--rc-color-primary); }
.rc-nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.rc-nav-links a {
  color: var(--rc-color-text-muted);
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color 0.2s;
}
.rc-nav-links a:hover { color: var(--rc-color-primary-light); text-decoration: none; }

/* ==========================================================================
   Hero
   ========================================================================== */
.rc-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--rc-nav-height) + 2rem) 1.5rem 4rem;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(45, 122, 94, 0.15), transparent 60%),
              var(--rc-color-bg);
}
.rc-hero-inner {
  max-width: var(--rc-max-width);
  text-align: center;
}
.rc-hero-tag {
  display: inline-block;
  font-size: 0.8125rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--rc-color-primary-light);
  margin-bottom: 1rem;
}
.rc-hero h1 {
  font-family: var(--rc-font-heading);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 400;
  line-height: 1.15;
  color: var(--rc-color-text);
  margin: 0 0 1.25rem;
  letter-spacing: -0.02em;
}
.rc-hero p {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--rc-color-text-muted);
  max-width: 36rem;
  margin: 0 auto 2rem;
}
.rc-hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  background: var(--rc-color-primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s;
}
.rc-hero-cta:hover { background: var(--rc-color-primary-light); text-decoration: none; color: #fff; }

/* ==========================================================================
   Sections
   ========================================================================== */
.rc-section {
  padding: var(--rc-section-padding) 1.5rem;
  max-width: var(--rc-max-width);
  margin: 0 auto;
}
.rc-section-alt { background: var(--rc-color-surface); }
.rc-section-header {
  text-align: center;
  margin-bottom: 3rem;
}
.rc-section-header h2 {
  font-family: var(--rc-font-heading);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 400;
  color: var(--rc-color-text);
  margin: 0 0 0.75rem;
  letter-spacing: -0.02em;
}
.rc-section-header p {
  color: var(--rc-color-text-muted);
  max-width: 32rem;
  margin: 0 auto;
  font-size: 1.0625rem;
}

/* ==========================================================================
   What We Do (features grid)
   ========================================================================== */
.rc-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}
.rc-feature {
  background: var(--rc-color-surface-alt);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 2rem;
  transition: border-color 0.2s;
}
.rc-feature:hover { border-color: rgba(45, 122, 94, 0.4); }
.rc-feature-icon {
  width: 2.5rem;
  height: 2.5rem;
  margin-bottom: 1rem;
  color: var(--rc-color-primary);
  font-size: 1.5rem;
  line-height: 1;
}
.rc-feature h3 {
  font-family: var(--rc-font-body);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--rc-color-text);
  margin: 0 0 0.5rem;
}
.rc-feature p {
  color: var(--rc-color-text-muted);
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* ==========================================================================
   How It Works (steps)
   ========================================================================== */
.rc-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  counter-reset: step;
  margin-top: 2rem;
}
.rc-step {
  position: relative;
  padding-left: 3rem;
  counter-increment: step;
}
.rc-step::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 2rem;
  height: 2rem;
  background: var(--rc-color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.rc-step h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--rc-color-text);
  margin: 0 0 0.5rem;
}
.rc-step p {
  color: var(--rc-color-text-muted);
  margin: 0;
  font-size: 0.9375rem;
}

/* ==========================================================================
   CTA / Contact
   ========================================================================== */
.rc-cta {
  text-align: center;
  padding: var(--rc-section-padding) 1.5rem;
  background: linear-gradient(180deg, var(--rc-color-surface) 0%, var(--rc-color-bg) 100%);
}
.rc-cta-inner { max-width: var(--rc-max-width); margin: 0 auto; }
.rc-cta h2 {
  font-family: var(--rc-font-heading);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 400;
  color: var(--rc-color-text);
  margin: 0 0 1rem;
}
.rc-cta p {
  color: var(--rc-color-text-muted);
  margin: 0 0 1.5rem;
  max-width: 28rem;
  margin-left: auto;
  margin-right: auto;
}
.rc-cta a.rc-hero-cta { display: inline-flex; }

/* ==========================================================================
   Footer
   ========================================================================== */
.rc-footer {
  padding: 2rem 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  text-align: center;
}
.rc-footer p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--rc-color-text-muted);
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 640px) {
  .rc-nav-links { gap: 1.25rem; }
  .rc-hero { padding-top: calc(var(--rc-nav-height) + 1rem); }
}