:root {
  --bg: #fcfcfc;
  --fg: #111;
  --line: #cbcbcb;
  --line-strong: #111;
  --page-max: 44rem;
  --space-1: 0.45rem;
  --space-2: 0.78rem;
  --space-3: 1.2rem;
  --space-4: 1.75rem;
  --space-5: 2.55rem;
  --text-size: clamp(1.03rem, 0.96rem + 0.35vw, 1.14rem);
  --h1-size: clamp(1.45rem, 1.05rem + 1.5vw, 2.15rem);
  --h2-size: clamp(1.08rem, 0.98rem + 0.35vw, 1.24rem);
  --h3-size: clamp(1.01rem, 0.94rem + 0.2vw, 1.08rem);
  --button-radius: 999px;
}

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

html {
  background: var(--bg);
  color: var(--fg);
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #111;
  --fg: #f6f6f6;
  --line: #4d4d4d;
  --line-strong: #f6f6f6;
  color-scheme: dark;
}

body {
  max-width: var(--page-max);
  margin: clamp(2.2rem, 7vw, 4.6rem) auto;
  padding: 0 clamp(1rem, 3.2vw, 1.75rem);
  background: var(--bg);
  color: var(--fg);
  font-family:
    "Newsreader", "Iowan Old Style", "Palatino Linotype", Palatino,
    "Book Antiqua", Georgia, serif;
  font-size: var(--text-size);
  line-height: 1.7;
  letter-spacing: 0.002em;
  transition:
    background-color 0.2s ease,
    color 0.2s ease;
}

a {
  color: inherit;
  text-decoration-line: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.17em;
  transition:
    color 0.15s ease,
    background-color 0.15s ease,
    text-decoration-color 0.15s ease,
    border-color 0.15s ease;
}

a:hover {
  text-decoration-color: transparent;
}

a:focus,
a:focus-visible {
  outline: 2px solid var(--line-strong);
  outline-offset: 3px;
  text-decoration: none;
}

h1,
h2,
h3 {
  margin-bottom: 0;
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-wrap: balance;
}

h1 {
  font-size: var(--h1-size);
  margin-top: 0;
}

h2 {
  font-size: var(--h2-size);
  margin-top: var(--space-5);
  margin-bottom: var(--space-2);
}

h3 {
  font-size: var(--h3-size);
  margin-top: var(--space-4);
  margin-bottom: var(--space-1);
}

p {
  margin: var(--space-2) 0;
}

ul {
  margin: var(--space-2) 0 var(--space-4) 1.2em;
  padding: 0;
}

li {
  margin: 0.3em 0;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: var(--space-5) 0;
}

nav {
  margin-top: var(--space-3);
}

nav p {
  margin: 0.25em 0 0;
}

footer {
  margin-top: var(--space-3);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 0.95rem;
  margin: 0.4em 0 0;
}

.footer-link {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
}

.footer-link svg {
  width: 14px;
  height: 14px;
  flex: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.theme-toggle {
  position: fixed;
  top: max(12px, env(safe-area-inset-top));
  right: max(12px, calc((100vw - var(--page-max)) / 2));
  left: auto;
  z-index: 40;
  width: 3rem;
  height: 1.72rem;
  padding: 0.12rem;
  border: 1.5px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--line-strong);
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  cursor: pointer;
  transition:
    background-color 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
}

.theme-toggle__thumb {
  width: 1.14rem;
  height: 1.14rem;
  border: 1.5px solid currentColor;
  border-radius: 999px;
  background: currentColor;
  transform: translateX(0);
  transition:
    transform 0.2s ease,
    background-color 0.2s ease,
    border-color 0.2s ease;
}

html[data-theme="dark"] .theme-toggle__thumb {
  transform: translateX(1.18rem);
  background: transparent;
}

.theme-toggle:hover {
  background: rgba(0, 0, 0, 0.06);
}

html[data-theme="dark"] .theme-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

.theme-toggle:focus,
.theme-toggle:focus-visible {
  outline: 2px solid var(--line-strong);
  outline-offset: 3px;
}

.bw-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.35rem;
  padding: 0.25rem 0.74rem 0.3rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--button-radius);
  background: var(--line-strong);
  color: var(--bg);
  text-decoration: none;
  letter-spacing: 0.01em;
  font-size: 0.86em;
  font-weight: 500;
  line-height: 1.1;
}

.bw-button:hover {
  background: var(--bg);
  color: var(--line-strong);
  text-decoration: none;
}

.bw-button:focus,
.bw-button:focus-visible {
  outline: 2px solid var(--line-strong);
  outline-offset: 3px;
  text-decoration: none;
}

.contact-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: clamp(1.1rem, 2.5vw, 1.45rem);
  margin: var(--space-3) 0 var(--space-4);
  background: rgba(128, 128, 128, 0.04);
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    background-color 0.2s ease;
}

.contact-card:hover {
  border-color: var(--line-strong);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

html[data-theme="dark"] .contact-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

.contact-card__title {
  margin-top: 0;
  margin-bottom: var(--space-1);
  font-size: var(--h3-size);
}

.contact-card__text {
  margin: 0 0 var(--space-3);
  font-size: 0.98em;
  opacity: 0.9;
  line-height: 1.55;
}

.contact-card__buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 0.85rem;
  align-items: center;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 1rem 0.48rem;
  font-size: 0.94em;
  font-weight: 500;
  border-radius: var(--button-radius);
  text-decoration: none;
  cursor: pointer;
  letter-spacing: 0.01em;
  transition:
    transform 0.15s ease,
    background-color 0.15s ease,
    color 0.15s ease,
    border-color 0.15s ease;
}

.contact-btn:hover {
  transform: translateY(-1px);
}

.contact-btn--primary {
  background: var(--line-strong);
  color: var(--bg);
  border: 1px solid var(--line-strong);
}

.contact-btn--primary:hover {
  background: var(--bg);
  color: var(--line-strong);
  text-decoration: none;
}

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

.contact-btn--secondary:hover {
  background: var(--line-strong);
  color: var(--bg);
  text-decoration: none;
}

.direct-contact-links {
  margin-top: var(--space-3);
  line-height: 1.85;
}

@media (max-width: 560px) {
  body {
    line-height: 1.64;
  }

  h2 {
    margin-top: var(--space-4);
  }

  nav {
    margin-top: 1rem;
  }

  .bw-button {
    font-size: 0.8em;
    padding-inline: 0.66rem;
  }

  .contact-btn {
    font-size: 0.86em;
    padding: 0.42rem 0.85rem;
    width: 100%;
    justify-content: center;
  }

  .theme-toggle {
    width: 2.8rem;
    height: 1.62rem;
  }

  .theme-toggle__thumb {
    width: 1.04rem;
    height: 1.04rem;
  }

  html[data-theme="dark"] .theme-toggle__thumb {
    transform: translateX(1.08rem);
  }
}