/* Modern beauty revamp */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  --bg: #0b1220;
  --card: #0f172a;
  --accent: #22d3ee;
  --accent-2: #60a5fa;
  --text: #e5e7eb;
  --muted: #9ca3af;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(34,211,238,0.12), transparent 60%),
    radial-gradient(1000px 500px at 90% 10%, rgba(96,165,250,0.10), transparent 65%),
    linear-gradient(180deg, #0b1220 0%, #0b1220 100%);
  color: var(--text);
  font-family: "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  margin: 0;
}

.header {
  padding: 36px 24px;
  text-align: center;
}
.header h1 {
  margin: 0 0 12px;
  font-size: 28px;
  letter-spacing: 0.4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.header p { margin: 0; color: var(--muted); }

.card {
  max-width: 880px;
  margin: 0 auto;
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(148,163,184,0.20);
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.45);
  padding: 24px;
  backdrop-filter: blur(6px);
}

.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.form-grid label { display: flex; flex-direction: column; gap: 10px; }
.form-grid span { font-weight: 600; color: var(--text); }
.form-grid input, .form-grid select {
  padding: 12px 14px;
  border: 1px solid rgba(148,163,184,0.25);
  background: rgba(2,6,23,0.6);
  color: var(--text);
  border-radius: 10px;
  outline: none;
  font-size: 14px;
}
.form-grid input::placeholder { color: var(--muted); }
.form-grid input:focus, .form-grid select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(34,211,238,0.25);
}

.actions { grid-column: 1 / -1; display: flex; gap: 12px; justify-content: flex-end; margin-top: 8px; }
.btn {
  padding: 10px 16px;
  border: 1px solid rgba(34,211,238,0.35);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(34,211,238,0.25), rgba(34,211,238,0.15));
  color: var(--text);
  cursor: pointer; font-weight: 600;
}
.btn:hover { filter: brightness(1.12); }
.btn-secondary { border-color: rgba(96,165,250,0.35); background: linear-gradient(180deg, rgba(96,165,250,0.25), rgba(96,165,250,0.15)); }

.result { margin-top: 16px; padding-top: 12px; border-top: 1px dashed rgba(148,163,184,0.3); }
.result h2 { margin: 12px 0; font-size: 18px; color: var(--accent); }
.result p { margin: 6px 0; }
.result .meta { color: var(--muted); font-size: 13px; }
.hidden { display: none; }

.note { margin-top: 20px; background: rgba(2,6,23,0.5); border: 1px solid rgba(148,163,184,0.2); border-radius: 12px; padding: 16px; }
.note h3 { margin: 0 0 8px; font-size: 16px; color: var(--accent-2); }
.note p { margin: 8px 0; color: var(--muted); }

.footer { text-align: center; color: var(--muted); padding: 20px; }

@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
  .actions { justify-content: stretch; }
}