:root {
  /* Brand colors */
  --color-primary:       #2563eb;
  --color-primary-2:     #1d4ed8;
  --color-primary-light: #eff6ff;
  --color-primary-border: #bfdbfe;
  --color-success:       #16a34a;
  --color-success-2:     #15803d;
  --color-success-light: #f0fdf4;
  --color-danger:        #dc2626;
  --color-danger-dark:   #b91c1c;
  --color-danger-light:  #fef2f2;
  --color-warning:       #d97706;
  --color-warning-light: #fffbeb;
  --color-info:          #2563eb;

  /* Surface colors */
  --surface-page:   #f8fafc;
  --surface-card:   #ffffff;
  --surface-subtle: #f1f5f9;

  /* Border */
  --border-default: #e2e8f0;
  --border-strong:  #cbd5e1;

  /* Text */
  --text-primary:   #0f172a;
  --text-secondary: #475569;
  --text-muted:     #94a3b8;

  /* Neutral grays (kept for compatibility) */
  --pro-navy:        #0f172a;
  --pro-slate:       #1e293b;
  --pro-slate-2:     #334155;
  --pro-blue:        #2563eb;
  --pro-blue-hover:  #1d4ed8;
  --pro-blue-light:  #eff6ff;
  --pro-blue-border: #bfdbfe;
  --color-gray-50:   #f8fafc;
  --color-gray-100:  #f1f5f9;
  --color-gray-200:  #e2e8f0;
  --color-gray-400:  #94a3b8;
  --color-gray-500:  #64748b;
  --color-gray-700:  #334155;
  --color-gray-900:  #0f172a;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.07);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.09);

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #1d4ed8 0%, #2563eb 100%);
  --gradient-success: linear-gradient(135deg, #16a34a 0%, #15803d 100%);
}

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--surface-page);
  color: var(--text-primary);
}

code {
  font-family: 'Menlo', 'Monaco', 'Consolas', 'Courier New', monospace;
}

/* ── Visually hidden (screen-reader only) ───────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ── Toast notifications ─────────────────────────────────────────────────── */
.toast-list {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  color: #fff;
  box-shadow: 0 4px 16px rgba(0,0,0,0.18);
  pointer-events: all;
  cursor: pointer;
  animation: toast-in 0.2s ease;
  max-width: 340px;
}
@keyframes toast-in {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.toast-success { background: #15803d; }
.toast-error   { background: #b91c1c; }
.toast-info    { background: #1d4ed8; }
.toast-icon {
  font-size: 15px;
  flex-shrink: 0;
  font-weight: 700;
}

/* ── Shared button classes ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s, opacity 0.15s;
  line-height: 1.4;
}
.btn:disabled, .btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.btn-primary:hover:not(:disabled) { background: var(--color-primary-2); border-color: var(--color-primary-2); }
.btn-secondary {
  background: #fff;
  color: var(--text-secondary);
  border-color: var(--border-default);
}
.btn-secondary:hover:not(:disabled) { border-color: var(--border-strong); color: var(--text-primary); }
.btn-danger {
  background: var(--color-danger-light);
  color: var(--color-danger);
  border-color: #fecaca;
}
.btn-danger:hover:not(:disabled) { background: #fee2e2; }
.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: transparent;
}
.btn-ghost:hover:not(:disabled) { background: var(--color-primary-light); }
.btn-sm { padding: 5px 12px; font-size: 13px; }
.btn-lg { padding: 11px 24px; font-size: 15px; }

/* ── Shared input class ──────────────────────────────────────────────────── */
.input-field {
  width: 100%;
  padding: 9px 13px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  background: #fff;
  color: var(--text-primary);
  font-size: 14px;
  outline: none;
  box-sizing: border-box;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.input-field:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.input-field.input-error {
  border-color: var(--color-danger);
  box-shadow: 0 0 0 3px rgba(220,38,38,0.08);
}

/* ── Shared field error message ─────────────────────────────────────────── */
.field-error {
  font-size: 12px;
  color: var(--color-danger);
  margin-top: 4px;
  display: block;
}