:root {
  --bg: #0f172a;
  --card: #111827;
  --muted: #9ca3af;
  --text: #e5e7eb;
  --brand: #22c55e;
  --brand-2: #06b6d4;
  --danger: #ef4444;
  --border: rgba(255,255,255,.08);
}

* { box-sizing: border-box; }
html, body { height: 100%; }

body {
  margin: 0;
  font-family: ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;
  background:
    radial-gradient(1200px 700px at 10% -10%, #1f2937 0%, rgba(31,41,55,0) 60%),
    radial-gradient(1200px 700px at 110% 10%, #0e7490 0%, rgba(14,116,144,0) 50%),
    var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.app-header { padding: 32px 16px 8px; text-align: center; }
.app-header h1 { margin: 0; font-size: clamp(28px, 5vw, 44px); }
.tagline { max-width: 800px; margin: 8px auto 0; color: var(--muted); }

.container { max-width: 900px; margin: 24px auto; padding: 0 16px; display: grid; gap: 16px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px 16px 8px; box-shadow: 0 10px 30px rgba(0,0,0,.25); }

.form-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); align-items: end; }
.form-field { display: flex; flex-direction: column; gap: 6px; }
label { font-weight: 600; }

input, select {
  background: #0b1220;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 12px;
  font-size: 16px;
  outline: none;
}
input:focus, select:focus { border-color: #1f9cf0; box-shadow: 0 0 0 3px rgba(31,156,240,.15); }

.form-actions { display: flex; gap: 8px; align-items: center; }
.btn { appearance: none; border: 1px solid var(--border); background: #0b1220; color: var(--text); padding: 10px 14px; border-radius: 10px; cursor: pointer; }
.btn.primary { background: linear-gradient(90deg, var(--brand), var(--brand-2)); border: none; font-weight: 700; }
.btn:disabled { opacity: .6; cursor: not-allowed; }

.disclaimer { color: var(--muted); font-size: 13px; margin: 8px 0 0; }
.results { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.result-card { background: var(--card); border: 1px solid var(--border); border-radius: 14px; padding: 16px; }

.progress { height: 12px; background: #0b1220; border: 1px solid var(--border); border-radius: 999px; overflow: hidden; }
.bar { height: 100%; background: linear-gradient(90deg, var(--brand), var(--brand-2)); transition: width .5s ease; }

.result-text { font-size: 18px; margin: 10px 0 4px; }
.muted { color: var(--muted); }
.hidden { display: none; }

.footer { max-width: 900px; margin: 24px auto; padding: 0 16px 32px; text-align: center; }

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
}
.modal {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  max-width: 720px;
  width: min(92vw, 720px);
  padding: 16px 16px 8px;
  box-shadow: 0 20px 60px rgba(0,0,0,.45);
}
.modal h3 { margin: 0 0 8px; }
.modal p { margin: 8px 0; }
.modal ul { margin: 8px 0 8px 18px; }
.modal-close {
  position: absolute;
  right: 12px;
  top: 8px;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 22px;
  cursor: pointer;
}

/* Ensure hidden overrides modal layout */
.modal-overlay.hidden { display: none; }