/* Buttons, cards, forms – modern UI */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: var(--min-touch);
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.9375rem;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
  text-decoration: none;
}
.btn:focus-visible { outline: none; box-shadow: var(--shadow-focus); }
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: var(--color-primary-gradient);
  color: #fff;
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.3);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
  box-shadow: 0 4px 16px rgba(14, 165, 233, 0.35);
  transform: translateY(-1px);
}
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--color-primary);
}
.btn-ghost:hover { background: rgba(14, 165, 233, 0.08); text-decoration: none; }
.btn-danger {
  background: var(--color-error);
  color: #fff;
  box-shadow: 0 2px 8px rgba(220, 38, 38, 0.25);
}
.btn-danger:hover { background: #b91c1c; box-shadow: 0 4px 12px rgba(220, 38, 38, 0.3); transform: translateY(-1px); }
.btn-block { width: 100%; }
a.btn { text-decoration: none; }
a.btn:hover { text-decoration: none; }

.card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
  border: 1px solid var(--color-border);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); border-color: #e2e8f0; }

.form-group { margin-bottom: var(--space-md); }
.form-label { display: block; margin-bottom: var(--space-xs); font-weight: 500; color: var(--color-text); font-size: 0.875rem; }
.form-control {
  width: 100%;
  min-height: var(--min-touch);
  padding: 0.625rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  background: var(--color-surface);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-control:hover { border-color: #cbd5e1; }
.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
}
textarea.form-control { min-height: 100px; resize: vertical; padding: 0.75rem 1rem; }
.form-error { color: var(--color-error); font-size: 0.875rem; margin-top: var(--space-xs); }
.form-hint { color: var(--color-text-muted); font-size: 0.8125rem; margin-top: var(--space-xs); line-height: 1.4; }
.form-required { color: var(--color-error); }

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 0 var(--space-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--color-border);
  flex-wrap: wrap;
  gap: var(--space-sm);
}
.nav-brand {
  font-weight: 700;
  font-size: 1.375rem;
  background: var(--color-primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
}
.nav-brand:hover { text-decoration: none; -webkit-text-fill-color: var(--color-primary); }
.nav-links { display: flex; align-items: center; gap: var(--space-sm); list-style: none; margin: 0; padding: 0; }
.nav-links a {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: background var(--transition), color var(--transition);
}
.nav-links a:hover { background: #f1f5f9; color: var(--color-primary); text-decoration: none; }

.alert { padding: var(--space-md); border-radius: var(--radius); margin-bottom: var(--space-md); }
.alert-error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert-success { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }

@media (max-width: 768px) {
  .nav { padding: 0 var(--space-md); min-height: 56px; }
  .nav-links { flex-wrap: wrap; }
}

/* Upload zone (profile photo) */
.upload-zone {
  position: relative;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  transition: border-color 0.2s, background 0.2s;
  cursor: pointer;
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.upload-zone:hover, .upload-zone.dragover {
  border-color: var(--color-primary);
  background: rgba(14, 165, 233, 0.04);
}
.upload-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}
.upload-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  pointer-events: none;
}