:root {
  color-scheme: light;
  --bg: oklch(0.985 0 0);
  --surface: oklch(0.89 0.035 104 / 0.68);
  --field: oklch(0.96 0.022 102 / 0.72);
  --field-focus: oklch(0.985 0.015 102 / 0.82);
  --ink: oklch(0.22 0.04 125);
  --muted: oklch(0.38 0.035 118);
  --accent: oklch(0.43 0.095 124);
  --accent-dark: oklch(0.35 0.08 124);
  --border: oklch(0.62 0.06 110 / 0.42);
  --error: oklch(0.49 0.18 27);
  --success: oklch(0.45 0.14 150);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(
      90deg,
      color-mix(in oklch, var(--ink) 18%, transparent) 0%,
      color-mix(in oklch, var(--ink) 8%, transparent) 42%,
      color-mix(in oklch, var(--ink) 34%, transparent) 100%
    ),
    url("background.jpg") center / cover no-repeat fixed,
    var(--bg);
  color: var(--ink);
}

.shell {
  width: min(100%, 1180px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 40px 28px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.form-panel {
  width: min(100%, 520px);
  padding: 32px;
  border-radius: 8px;
  background: var(--surface);
  border: 1px solid color-mix(in oklch, var(--border) 70%, transparent);
  box-shadow: 0 18px 44px color-mix(in oklch, var(--ink) 34%, transparent);
  backdrop-filter: blur(4px) saturate(1.04);
}

.heading {
  margin-bottom: 22px;
}

h1 {
  margin: 0;
  font-size: 2.125rem;
  line-height: 1.15;
  letter-spacing: 0;
  text-wrap: balance;
}

form {
  display: grid;
  gap: 14px;
}

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

textarea {
  min-height: 280px;
  width: 100%;
  resize: vertical;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: linear-gradient(var(--field), var(--field)) padding-box,
    linear-gradient(180deg, color-mix(in oklch, var(--accent) 30%, var(--border)), var(--border)) border-box;
  color: var(--ink);
  padding: 16px 18px;
  font: inherit;
  line-height: 1.55;
  outline: none;
}

textarea::placeholder {
  color: oklch(0.58 0.035 110 / 0.7);
}

textarea:focus {
  border-color: var(--accent);
  background: linear-gradient(var(--field-focus), var(--field-focus)) padding-box,
    linear-gradient(180deg, color-mix(in oklch, var(--accent) 50%, var(--border)), var(--border)) border-box;
  box-shadow: 0 0 0 3px color-mix(in oklch, var(--accent) 16%, transparent);
}

.hp-field {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.form-footer {
  display: flex;
  min-height: 46px;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
}

.form-status {
  display: grid;
  gap: 4px;
}

.message {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.counter {
  margin: 0;
  color: var(--muted);
  font-size: 0.8125rem;
}

.message.is-error {
  color: var(--error);
}

.message.is-success {
  color: var(--success);
}

button {
  min-width: 144px;
  min-height: 46px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: var(--accent-dark);
}

button:focus-visible {
  outline: 3px solid color-mix(in oklch, var(--accent) 28%, transparent);
  outline-offset: 2px;
}

button:disabled {
  cursor: wait;
  opacity: 0.72;
}

@media (max-width: 560px) {
  body {
    background:
      linear-gradient(
        180deg,
        color-mix(in oklch, var(--ink) 42%, transparent) 0%,
        color-mix(in oklch, var(--ink) 20%, transparent) 38%,
        color-mix(in oklch, var(--ink) 48%, transparent) 100%
      ),
      url("background.jpg") 42% center / cover no-repeat fixed,
      var(--bg);
  }

  .shell {
    padding: 18px 14px;
    align-items: center;
    justify-content: center;
  }

  .form-panel {
    padding: 22px 18px;
    width: 100%;
  }

  h1 {
    font-size: 1.75rem;
  }

  textarea {
    min-height: 320px;
  }

  .form-footer {
    align-items: stretch;
    flex-direction: column;
  }

  button {
    width: 100%;
  }
}