:root {
  color-scheme: light dark;
  --bg: #f8fafc;
  --text: #0f172a;
  --card: #ffffff;
  --accent: #2563eb;
  --accent-weak: #dbeafe;
  --shadow: rgba(15, 23, 42, 0.12);
}

body.dark {
  --bg: #0b1220;
  --text: #e2e8f0;
  --card: #111827;
  --accent: #60a5fa;
  --accent-weak: #1f2a44;
  --shadow: rgba(0, 0, 0, 0.35);
}

body {
  font-family: sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 50px 16px 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background 200ms ease, color 200ms ease;
}

.top-bar {
  width: min(720px, 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

h1 {
  margin: 0;
  font-size: 28px;
}

#theme-toggle {
  padding: 8px 14px;
  font-size: 14px;
  border-radius: 999px;
  border: 1px solid var(--accent);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease, border-color 200ms ease;
}

#theme-toggle:hover {
  background: var(--accent-weak);
}

#generator-btn {
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
  margin-bottom: 20px;
  border-radius: 10px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #ffffff;
  box-shadow: 0 8px 20px var(--shadow);
  transition: transform 120ms ease, box-shadow 200ms ease;
}

#generator-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 26px var(--shadow);
}

#numbers-container {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.number-circle {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--accent-weak);
  color: var(--text);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 20px;
  font-weight: bold;
  box-shadow: 0 6px 14px var(--shadow);
  transition: background 200ms ease, color 200ms ease;
}

.contact-section {
  width: min(720px, 100%);
  background: var(--card);
  border-radius: 16px;
  padding: 24px;
  margin: 28px 0 60px;
  box-shadow: 0 12px 30px var(--shadow);
  transition: background 200ms ease, box-shadow 200ms ease;
}

.comments-section {
  width: min(720px, 100%);
  background: var(--card);
  border-radius: 16px;
  padding: 24px;
  margin: 0 0 60px;
  box-shadow: 0 12px 30px var(--shadow);
  transition: background 200ms ease, box-shadow 200ms ease;
}

.contact-section h2 {
  margin: 0 0 16px;
  font-size: 22px;
}

.comments-section h2 {
  margin: 0 0 16px;
  font-size: 22px;
}

#disqus_thread {
  min-height: 140px;
}

.contact-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
}

.field-full {
  grid-column: 1 / -1;
}

.contact-form input,
.contact-form textarea {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: transparent;
  color: var(--text);
  font-size: 15px;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.18);
}

.submit-btn {
  grid-column: 1 / -1;
  padding: 12px 18px;
  border-radius: 12px;
  border: none;
  background: var(--accent);
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 10px 24px var(--shadow);
  transition: transform 120ms ease, box-shadow 200ms ease;
}

.submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 28px var(--shadow);
}

@media (max-width: 640px) {
  .top-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .contact-form {
    grid-template-columns: 1fr;
  }
}