:root {
  --demo-overlay: rgba(3, 7, 18, 0.78);
  --demo-surface: linear-gradient(180deg, rgba(12,17,32,0.96) 0%, rgba(10,15,28,0.98) 100%);
  --demo-border: rgba(255,255,255,0.08);
  --demo-input-bg: rgba(255,255,255,0.03);
  --demo-shadow: 0 32px 100px rgba(0,0,0,0.55), 0 0 0 1px rgba(0,212,255,0.08);
}

.demo-modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--demo-overlay);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.28s ease, visibility 0.28s ease;
  z-index: 10000;
}

.demo-modal.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.demo-modal-card {
  width: min(100%, 560px);
  max-height: min(90vh, 760px);
  overflow-y: auto;
  border-radius: 24px;
  background: var(--demo-surface);
  border: 1px solid var(--demo-border);
  box-shadow: var(--demo-shadow);
  position: relative;
}

.demo-modal-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background:
    radial-gradient(circle at top left, rgba(0,212,255,0.12), transparent 34%),
    radial-gradient(circle at bottom right, rgba(124,58,237,0.14), transparent 30%);
  pointer-events: none;
}

.demo-modal-inner {
  position: relative;
  z-index: 1;
  padding: 34px 30px 28px;
}

.demo-modal-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
}

.demo-modal-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.18);
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.74rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.demo-modal-badge::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 14px rgba(0,212,255,0.45);
}

.demo-modal-title {
  margin: 0;
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
}

.demo-modal-title span {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 65%, #ec4899 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.demo-modal-sub {
  margin-top: 14px;
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.7;
  max-width: 420px;
}

.demo-modal-close {
  appearance: none;
  border: 1px solid var(--demo-border);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.25rem;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.demo-modal-close:hover {
  transform: translateY(-1px);
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.12);
}

.demo-form {
  display: grid;
  gap: 18px;
}

.demo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.demo-field {
  display: grid;
  gap: 8px;
}

.demo-field.full {
  grid-column: 1 / -1;
}

.demo-label {
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 600;
}

.demo-input {
  width: 100%;
  border-radius: 14px;
  border: 1px solid var(--demo-border);
  background: var(--demo-input-bg);
  color: var(--text);
  padding: 14px 16px;
  font-size: 0.96rem;
  font-family: 'DM Sans', sans-serif;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.demo-input::placeholder {
  color: var(--text-dim);
}

.demo-input:focus {
  border-color: rgba(0,212,255,0.42);
  box-shadow: 0 0 0 4px rgba(0,212,255,0.12);
  background: rgba(255,255,255,0.045);
}

.demo-input.is-invalid {
  border-color: rgba(239,68,68,0.65);
  box-shadow: 0 0 0 4px rgba(239,68,68,0.10);
}

.demo-error {
  display: none;
  color: #fca5a5;
  font-size: 0.82rem;
}

.demo-field.has-error .demo-error {
  display: block;
}

.demo-note {
  margin-top: 2px;
  font-size: 0.84rem;
  color: var(--text-dim);
  line-height: 1.6;
}

.demo-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 6px;
}

.demo-submit {
  appearance: none;
  border: none;
  padding: 14px 24px;
  border-radius: 12px;
  background: var(--accent);
  color: #000;
  font-family: 'Syne', sans-serif;
  font-size: 0.96rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  cursor: pointer;
  box-shadow: 0 0 26px rgba(0,212,255,0.28);
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.demo-submit:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 36px rgba(0,212,255,0.38);
}

.demo-submit:disabled {
  cursor: wait;
  opacity: 0.75;
  transform: none;
}

.demo-status {
  min-height: 24px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.demo-status.success { color: #86efac; }
.demo-status.error { color: #fca5a5; }

body.demo-modal-open {
  overflow: hidden;
}

@media (max-width: 640px) {
  .demo-modal {
    padding: 16px;
    align-items: flex-end;
  }

  .demo-modal-card {
    width: 100%;
    max-height: 92vh;
    border-radius: 22px 22px 0 0;
  }

  .demo-modal-inner {
    padding: 28px 18px 22px;
  }

  .demo-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .demo-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .demo-submit {
    width: 100%;
  }
}