:root {
  --color-bg: #fafaf7;
  --color-text: #1a1a1a;
  --color-text-muted: #5a5a5a;
  --color-accent: #2d6a4f;
  --color-accent-light: #40916c;
  --color-accent-bg: #f0f7f4;
  --color-border: #d4d4c8;
  --color-white: #ffffff;
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

/* --- Navigation --- */

.nav {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1.25rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
  background: rgba(250, 250, 247, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}

.nav.scrolled {
  border-bottom-color: var(--color-border);
}

.nav-logo {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

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

.nav-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 400;
  transition: color 0.2s;
}

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

/* --- Hero --- */

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 6rem 2rem 4rem;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  padding: 0.35rem 1rem;
  background: var(--color-accent-bg);
  color: var(--color-accent);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  margin-bottom: 2rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
}

.hero h1 .accent {
  color: var(--color-accent);
}

.hero p {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin-bottom: 2.5rem;
  line-height: 1.8;
}

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

.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  font-family: var(--font-main);
}

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

.btn-primary:hover {
  background: var(--color-accent-light);
  transform: translateY(-1px);
}

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

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

/* --- Sections --- */

section {
  padding: 6rem 2rem;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  line-height: 1.25;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 3rem;
}

/* --- Principles --- */

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

.principle-card {
  padding: 2rem;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: var(--color-white);
  transition: border-color 0.2s, transform 0.2s;
}

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

.principle-icon {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.principle-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.principle-card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* --- About --- */

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about-text p {
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-details {
  padding: 2rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.about-detail-item {
  padding: 1rem 0;
  border-bottom: 1px solid var(--color-border);
}

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

.about-detail-item dt {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.about-detail-item dd {
  font-size: 0.95rem;
  color: var(--color-text);
}

/* --- Newsletter --- */

.newsletter {
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.newsletter-inner {
  max-width: 560px;
  margin: 0 auto;
  text-align: center;
}

.newsletter-form {
  display: flex;
  gap: 0.75rem;
  margin-top: 2rem;
}

.newsletter-form input[type="email"] {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.9rem;
  font-family: var(--font-main);
  background: var(--color-bg);
  color: var(--color-text);
  outline: none;
  transition: border-color 0.2s;
}

.newsletter-form input[type="email"]:focus {
  border-color: var(--color-accent);
}

.newsletter-form input[type="email"]::placeholder {
  color: #aaa;
}

.newsletter-note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.75rem;
}

/* --- Footer --- */

.footer {
  padding: 3rem 2rem;
  text-align: center;
}

.footer p {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer a {
  color: var(--color-accent);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

/* --- Responsive --- */

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .newsletter-form {
    flex-direction: column;
  }

  section {
    padding: 4rem 1.5rem;
  }
}