/* kiriltrenkov.com — plain on purpose.
   One column, system fonts, no downloads, no framework. */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: #fff;
  color: #1b1b1b;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 18px;
  line-height: 1.65;
}

main {
  max-width: 680px;
  margin: 0 auto;
  padding: 40px 20px 64px;
}

.top { margin-bottom: 40px; }
.who { margin: 0; color: #555; font-size: 16px; }
.who strong { color: #1b1b1b; font-size: 17px; }

h1 {
  font-size: clamp(30px, 6vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
}

.lead {
  font-size: 21px;
  line-height: 1.5;
  color: #333;
  margin: 0 0 28px;
}

h2 {
  font-size: 24px;
  line-height: 1.25;
  margin: 56px 0 12px;
}

h3 { font-size: 20px; margin: 0 0 8px; }

p { margin: 0 0 16px; }

a { color: #0b57d0; }
a:hover { color: #0842a0; }

ul, ol { margin: 0 0 16px; padding-left: 24px; }
li { margin-bottom: 10px; }
li::marker { color: #999; }

.work { list-style: none; padding-left: 0; }
.work li { margin-bottom: 20px; }
.work strong { display: block; }

.aside { color: #666; font-size: 15px; }

.cta-line { margin: 28px 0 8px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.cta-side { color: #555; font-size: 16px; }

.button {
  display: inline-block;
  background: #1b1b1b;
  color: #fff;
  font-size: 17px;
  font-weight: 600;
  font-family: inherit;
  padding: 12px 22px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
}
.button:hover { background: #000; color: #fff; }
.button.secondary { background: #fff; color: #1b1b1b; border: 1px solid #bbb; }
.button.secondary:hover { border-color: #1b1b1b; background: #fff; }

:focus-visible { outline: 2px solid #0b57d0; outline-offset: 2px; }

/* form */
.form { margin-top: 24px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 600; font-size: 16px; margin-bottom: 6px; }
.field input, .field textarea {
  width: 100%;
  padding: 10px 12px;
  font-family: inherit;
  font-size: 17px;
  color: #1b1b1b;
  background: #fff;
  border: 1px solid #bbb;
  border-radius: 6px;
  resize: vertical;
}
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: #0b57d0;
  box-shadow: 0 0 0 2px rgba(11, 87, 208, 0.15);
}
.field.invalid input, .field.invalid textarea { border-color: #c0392b; }
.err { color: #c0392b; font-size: 15px; margin: 6px 0 12px; }

.form-success {
  margin-top: 24px;
  padding: 20px;
  border: 1px solid #cde3cd;
  background: #f2f8f2;
  border-radius: 6px;
}

[hidden] { display: none !important; }

.footer { margin-top: 64px; padding-top: 20px; border-top: 1px solid #e5e5e5; }
.footer p { margin: 0; }

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

@media print {
  .form, .button { display: none; }
  body { font-size: 13px; }
}