:root {
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.72);
  --panel: rgba(15, 18, 24, 0.72);
  --border: rgba(255, 255, 255, 0.16);
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
  --radius: 18px;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
  color: var(--text);

  /* Background image */
  background:
    url("images/background.jpg") center/cover no-repeat fixed;
}

/* Dark overlay to keep text readable */
.bg-overlay {
  position: fixed;
  inset: 0;
  background: radial-gradient(900px 600px at 15% 10%, rgba(0,0,0,0.35), rgba(0,0,0,0.55)),
              linear-gradient(180deg, rgba(0,0,0,0.45), rgba(0,0,0,0.70));
  pointer-events: none;
  z-index: 0;
}

.container {
  width: min(980px, calc(100% - 40px));
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.header {
  padding: 64px 0 22px;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: 0.2px;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  max-width: 70ch;
  font-size: 1.05rem;
}

main { padding: 18px 0 44px; }

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 18px 16px;
  backdrop-filter: blur(10px);
  margin-bottom: 16px;
}

.card h2 {
  margin: 0 0 6px;
  font-size: 1.35rem;
}

.hint {
  margin: 0 0 14px;
  color: var(--muted);
}

.field { margin-bottom: 14px; }

label, legend {
  display: block;
  font-weight: 650;
  margin-bottom: 6px;
}

input[type="text"], textarea {
  width: 100%;
  padding: 11px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.28);
  color: var(--text);
  outline: none;
}

input[type="text"]::placeholder, textarea::placeholder {
  color: rgba(255, 255, 255, 0.55);
}

fieldset {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
}

.check {
  display: flex;
  gap: 10px;
  align-items: center;
  margin: 10px 0;
  font-weight: 550;
  color: var(--text);
}

.check input {
  width: 18px;
  height: 18px;
}

.btn {
  width: 100%;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 14px;
  padding: 12px 14px;
  font-weight: 750;
  cursor: pointer;
  background: rgba(255,255,255,0.88);
  color: rgba(0,0,0,0.9);
}

.btn:hover { filter: brightness(0.95); }

.micro {
  margin: 8px 0 0;
  color: rgba(255,255,255,0.65);
  font-size: 0.92rem;
}

.small ul {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.footer {
  padding: 16px 0 30px;
  color: rgba(255,255,255,0.6);
}

.hidden { display: none; }

@media (max-width: 640px) {
  .header { padding-top: 46px; }
  .card { padding: 16px; }
}