/* =========================
   Form Validator — Portfolio-Aligned
   ========================= */

*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --bg: #0f1216;
  --surface: #151a20;
  --surface2: #1b222b;
  --text: #f3f5f7;
  --muted: rgba(243, 245, 247, 0.72);
  --border: rgba(255, 255, 255, 0.12);
  --accent: #6eced1;
  --accentDeep: #3fa6a3;
  --error: #e5484d;
  --success: #2ecc71;

  --radius: 16px;
  --radiusLg: 22px;
  --shadow: 0 16px 50px rgba(0, 0, 0, 0.35);
}

/* Page */
body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background:
    radial-gradient(
      900px 520px at 18% 18%,
      rgba(110, 206, 209, 0.16),
      transparent 60%
    ),
    radial-gradient(
      900px 520px at 85% 22%,
      rgba(63, 166, 163, 0.12),
      transparent 62%
    ),
    linear-gradient(180deg, var(--bg), #0b0d10);
  color: var(--text);
}

/* Header */
.shell {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
}

.projectHeader {
  padding: 56px 0 32px;
}

.btnNav {
  display: inline-flex;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
  margin-bottom: 14px;
}

/* Demo */
.demo {
  padding: 32px 0 80px;
}

.demoHeader {
  text-align: center;
  margin-bottom: 28px;
}

.demoTitle {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.demoSub {
  color: var(--muted);
}

/* Form card */
.formCard {
  max-width: 420px;
  margin: 0 auto;
  background: linear-gradient(
    180deg,
    rgba(21, 26, 32, 0.96),
    rgba(27, 34, 43, 0.94)
  );
  border-radius: var(--radiusLg);
  padding: 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 16px;
  position: relative;
}

label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.85rem;
  color: var(--muted);
}

input {
  width: 100%;
  padding: 12px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}

input:focus {
  outline: none;
  border-color: rgba(110, 206, 209, 0.45);
}

small {
  position: absolute;
  bottom: -18px;
  left: 0;
  font-size: 0.75rem;
  visibility: hidden;
}

button {
  width: 100%;
  margin-top: 14px;
  padding: 12px;
  border-radius: var(--radius);
  border: none;
  background: linear-gradient(135deg, var(--accentDeep), var(--accent));
  color: #0b0d10;
  font-weight: 800;
  cursor: pointer;
}

/* States */
.form-group.error input {
  border-color: var(--error);
}

.form-group.error small {
  visibility: visible;
  color: var(--error);
}

.form-group.success input {
  border-color: var(--success);
}