:root {
  color-scheme: light dark;

  /* Light mode (default) */
  --bg-color: #f4f4f4;
  --text-color: #666666;
  --line-color: #cccccc;
  --panel-color: #f4f4f4;
  --menu-text-color: #666666;
  --menu-bg-color: #ffffff;
  --menu-hover-bg-color: #e9e9e9;
}

/* Base typography */
body {
  margin: 0;
  font-family: 'Roboto', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
}

h1, h2, h3, h4, h5, h6,
p,
.page-title,
.page-subtext,
a {
  color: var(--text-color);
}

h1 {
  text-align: center;
}

h2 {
  margin-top: 0;
}

p {
  line-height: 1.6;
}

a {
  text-decoration: underline;
  text-decoration-color: var(--line-color);
}

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

/* Layout */
.wrapper {
  max-width: 900px;
  margin: auto;
  padding: 60px 20px;
}

.page-section {
  margin-top: 60px;
}

.page-title {
  font-size: 34px;
  font-weight: 600;
  color: var(--text-color);
  letter-spacing: 1px;
  text-align: center;
  margin-bottom: 12px;
  text-transform: none;
}

.page-subtext {
  font-size: 18px;
  color: var(--text-color);
  opacity: 0.85;
  line-height: 1.6;
  text-align: center;
  max-width: 650px;
  margin: 0 auto;
}

.divider {
  border-top: 1px solid #e5e5e5;
  margin: 28px 0;
}

/* Logo */
.logo {
  display: block;
  width: min(600px, 92vw);
  height: auto;
  margin: 0 auto 26px auto;
}

/* Card */
.card {
  max-width: 650px;
  margin: 0 auto;
  text-align: center;
}

.card h1 {
  font-size: 16px;
  font-weight: 400;
  opacity: 0.8;
  line-height: 1.6;
  color: var(--text-color);
  margin: 0 0 18px 0;
  text-align: center;
}

.card h2 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text-color);
  margin: 28px 0 10px 0;
  text-align: center;
}

.card p {
  font-size: 18px;
  color: var(--text-color);
  line-height: 1.6;
  margin: 0 0 18px 0;
}

.card p:first-of-type {
  margin-top: 6px;
}

.card p strong {
  font-weight: 600;
}

/* Tagline */
.tagline-lead {
  font-size: 18px;
  font-weight: 400;
  color: var(--text-color);
  margin-bottom: 14px;
  font-family: 'Roboto', Arial, sans-serif;
}

.tagline {
  display: block;
  margin-bottom: 18px;
  text-align: center;
}

.tagline-logo {
  width: 220px;
  height: auto;
  display: block;
  margin: 10px auto 18px auto;
}

/* Buttons */
.button {
  padding: 10px 18px;
  border: 1px solid #d6d6d6;
  border-radius: 10px;
  background: var(--bg-color);
  color: var(--text-color);
  text-decoration: none;
  font-family: 'Roboto', Arial, sans-serif;
  font-size: 15px;
  transition: all 0.15s ease;
}

.button:hover {
  background: var(--menu-hover-bg-color);
}

/* Social */
.social {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-top: 14px;
}

.social .button {
  white-space: nowrap;
}

.social .tagline-logo {
  width: 220px;
  height: auto;
}

/* Small / footer */
.small {
  color: var(--text-color);
  opacity: 0.7;
  margin-top: 18px;
}

.footer {
  margin-top: 30px;
  color: var(--text-color);
  opacity: 0.7;
  font-size: 14px;
  text-align: right;
}

/* Menu button */
.menu-button {
  position: fixed;
  top: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  cursor: pointer;
  z-index: 1001;
}

.menu-button span {
  display: block;
  height: 2px;
  width: 24px;
  background: var(--text-color);
  margin: 6px auto;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* hamburger -> X */
.menu-button.open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.menu-button.open span:nth-child(2) {
  opacity: 0;
}
.menu-button.open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Overlay */
.menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.18);
  z-index: 1000;
  opacity: 0;
  transition: opacity .25s ease;
}

.menu-open .menu-overlay {
  opacity: 1;
}

body.menu-open {
  overflow: hidden;
}

/* Menu panel */
#menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 260px;
  height: 100%;
  background: var(--menu-bg-color);
  padding: 60px 24px;
  box-shadow: -2px 0 6px rgba(0,0,0,0.08);
  transform: translateX(110%);
  transition: transform 0.3s ease;
  z-index: 1001;
}

#menu.open {
  transform: translateX(0);
}

#menu a {
  display: block;
  padding: 10px 6px;
  text-decoration: none;
  color: var(--menu-text-color);
  font-size: 16px;
}

#menu a:hover {
  background: var(--menu-hover-bg-color);
  border-radius: 6px;
}

/* SEO hidden H1 */
.seo-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-color: #666666;
    --text-color: #f4f4f4;
    --line-color: #999999;
    --panel-color: #666666;
    --menu-text-color: #f4f4f4;
    --menu-bg-color: #666666;
    --menu-hover-bg-color: #7a7a7a;
  }

  body {
    background-color: var(--bg-color);
    color: var(--text-color);
  }

  .button {
    background: var(--bg-color);
    color: var(--text-color);
    border-color: var(--line-color);
  }
}