:root {
  --color-bg: #f6f1e9;
  --color-surface: #ffffff;
  --color-surface-alt: #f8f4ed;
  --color-text: #0c1117;
  --color-text-secondary: #2f3b46;
  --color-text-tertiary: #6a7481;
  --color-border: #e3dacc;
  --color-primary: #0f766e;
  --color-primary-hover: #0b5d58;
  --color-primary-active: #094c48;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  --font-display: "Space Grotesk", "IBM Plex Sans", sans-serif;
  --font-body: "IBM Plex Sans", "Space Grotesk", sans-serif;
  --font-size-sm: 0.9rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.15rem;
  --font-size-xl: 1.45rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.6rem;

  --line-height-tight: 1.2;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

  --transition: all 0.25s ease;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition: none !important;
  }
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background: var(--color-bg);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.3s cubic-bezier(0.2, 0, 0, 1);
}

a:hover {
  color: var(--color-primary-hover);
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  top: -9999px;
  left: -9999px;
  background: var(--color-primary);
  color: #ffffff;
  padding: var(--space-sm) var(--space-md);
  border-radius: 999px;
  z-index: 10;
}

.skip-link:focus {
  top: var(--space-sm);
  left: var(--space-sm);
}

.container {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.content-narrow {
  max-width: 760px;
}

.nav {
  background-color: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid rgba(227, 218, 204, 0.8);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 24px rgba(12, 17, 23, 0.04);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.nav-logo {
  display: inline-block;
  color: var(--color-text);
  transition: var(--transition);
  font-weight: 700;
  font-size: var(--font-size-lg);
}

.nav-logo:hover {
  color: var(--color-primary);
  transform: translateY(-1px);
}

.logo-img {
  height: 44px;
  width: auto;
  display: block;
  transition: var(--transition);
}

.nav-logo:hover .logo-img {
  opacity: 0.8;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  list-style: none;
  margin: 0;
  padding: var(--space-xs) var(--space-sm);
  background: rgba(15, 118, 110, 0.08);
  border: 1px solid rgba(15, 118, 110, 0.18);
  border-radius: 999px;
}

.nav-menu a {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  transition: var(--transition);
}

.nav-menu a:hover {
  color: var(--color-primary);
  background: rgba(15, 118, 110, 0.12);
}

.section {
  padding: var(--space-3xl) 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.section-alt {
  background: var(--color-surface-alt);
}

.hero {
  border-top: none;
  border-bottom: 1px solid var(--color-border);
}

.hero-inner {
  display: grid;
  gap: var(--space-md);
  max-width: 900px;
}

.hero-inner .signup-card {
  margin-top: var(--space-xl);
}

h1, h2, h3 {
  font-family: var(--font-display);
  line-height: var(--line-height-tight);
  font-weight: 600;
  color: var(--color-text);
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-md);
}

h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
}

p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  line-height: var(--line-height-relaxed);
}

.hero-subheadline {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
}

.hero-helper {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  margin-bottom: 0;
}

.bullets {
  list-style: none;
  display: grid;
  gap: var(--space-sm);
  margin-top: var(--space-lg);
}

.bullets li {
  position: relative;
  padding-left: var(--space-lg);
  color: var(--color-text-secondary);
}

.bullets li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--color-text-tertiary);
  position: absolute;
  left: 0;
  top: 0.55rem;
}

.card-grid {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: var(--space-lg);
}

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

.signup-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: var(--space-xl);
  display: grid;
  gap: var(--space-lg);
}

.signup-copy p:last-child {
  margin-bottom: 0;
}

.signup-form {
  display: grid;
  gap: var(--space-md);
}

.form-field {
  display: grid;
  gap: var(--space-xs);
}

label {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

input[type="email"] {
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 0.75rem 0.9rem;
  font-size: var(--font-size-base);
  font-family: var(--font-body);
  color: var(--color-text);
  background: #ffffff;
}

.button {
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: #ffffff;
  border-radius: 999px;
  padding: 0.85rem 1.6rem;
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.button:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.button:active {
  background: var(--color-primary-active);
  border-color: var(--color-primary-active);
}

.form-helper {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  margin-bottom: 0;
}

.form-status {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  display: none;
  margin-bottom: 0;
}

.form-status.is-visible {
  display: block;
}

.footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
  padding: var(--space-2xl) 0;
}

.footer-link {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
}

.footer-link:hover {
  color: var(--color-primary);
}

@media (min-width: 768px) {
  h1 {
    font-size: 3rem;
  }

  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .signup-card {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }
}

@media (max-width: 600px) {
  .section {
    padding: var(--space-2xl) 0;
  }

  .hero {
    padding: var(--space-2xl) 0;
  }

  .nav-container {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-menu {
    background: transparent;
    border: none;
    padding: 0;
  }

  .nav-menu a {
    width: 100%;
    text-align: center;
  }

  .button {
    width: 100%;
  }
}