/* ============================================================================
   COMPONENTES v27 — Botões, formulários, chips, links
   ============================================================================ */

/* ============================================================== BUTTONS */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.25rem;
  font-family: var(--font-ui);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: var(--ls-snug);
  line-height: 1;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  transition: transform var(--t-fast), background var(--t-fast),
              border-color var(--t-fast), color var(--t-fast),
              box-shadow var(--t-fast);
  text-decoration: none;
  position: relative;
  isolation: isolate;
}

.btn svg { width: 18px; height: 18px; flex-shrink: 0; }

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
}

/* — variants -------------------------------------------------------- */
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-on-primary);
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, .2);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, .2);
  color: var(--color-text-on-primary);
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-accent:hover {
  background: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
  color: #fff;
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-xs);
}
.btn-secondary:hover {
  background: var(--color-muted);
  border-color: var(--color-text-3);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
}
.btn-ghost:hover {
  background: var(--color-muted);
}

.btn-link {
  background: transparent;
  color: var(--color-primary);
  padding-inline: 0;
}
.btn-link:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}
.btn-danger:hover { background: #DC2626; color: #fff; }

.btn-pix {
  background: var(--color-pix);
  color: #fff;
}
.btn-pix:hover { background: #00A36C; color: #fff; }

.btn-gold {
  background: var(--grad-gold);
  color: #2A1F00;
  font-weight: 700;
}

/* — sizes ----------------------------------------------------------- */
.btn-sm  { padding: 0.5rem 0.875rem;  font-size: var(--fs-xs); border-radius: var(--radius-sm); }
.btn-lg  { padding: 1rem 1.5rem;      font-size: var(--fs-md); border-radius: var(--radius-lg); }
.btn-xl  { padding: 1.125rem 2rem;    font-size: var(--fs-lg); border-radius: var(--radius-lg); }
.btn-block { width: 100%; }

.btn-icon {
  padding: 0.625rem;
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
}
.btn-icon.btn-lg { width: 48px; height: 48px; }
.btn-icon.btn-sm { width: 32px; height: 32px; padding: 0.375rem; }

/* — loading state --------------------------------------------------- */
.btn[data-loading="true"] {
  color: transparent !important;
  pointer-events: none;
  position: relative;
}
.btn[data-loading="true"]::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 18px; height: 18px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: btn-spin 700ms linear infinite;
  color: var(--color-text-on-primary);
}
@keyframes btn-spin { to { transform: rotate(360deg); } }

/* ============================================================ FORM FIELDS */
.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.form-label {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: var(--ls-snug);
}

.form-label .req { color: var(--color-danger); margin-left: 2px; }

.form-hint {
  font-size: var(--fs-xs);
  color: var(--color-text-3);
}

.form-error {
  font-size: var(--fs-xs);
  color: var(--color-danger);
  font-weight: 500;
}

.input,
.textarea,
.select {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-ui);
  font-size: var(--fs-base);
  line-height: 1.4;
  color: var(--color-text);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xs);
  transition: border-color var(--t-fast), box-shadow var(--t-fast), background var(--t-fast);
  appearance: none;
  -webkit-appearance: none;
}

.input::placeholder,
.textarea::placeholder { color: var(--color-text-muted); }

.input:hover,
.textarea:hover,
.select:hover {
  border-color: var(--color-border-strong);
}

.input:focus,
.textarea:focus,
.select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-ring);
}

.input[aria-invalid="true"],
.textarea[aria-invalid="true"] {
  border-color: var(--color-danger);
}

.textarea { min-height: 120px; resize: vertical; }

.select {
  background-image:
    linear-gradient(45deg, transparent 50%, currentColor 50%),
    linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position:
    calc(100% - 18px) 50%,
    calc(100% - 13px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 2.25rem;
  color: var(--color-text-3);
}

.input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.input-group .input { padding-left: 2.75rem; }
.input-group .input-icon {
  position: absolute;
  left: 0.875rem;
  width: 20px; height: 20px;
  color: var(--color-text-3);
  pointer-events: none;
}

/* Quantity input premium */
.qty-input {
  display: inline-flex;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
}
.qty-input button {
  width: 40px; height: 40px;
  font-size: var(--fs-lg);
  color: var(--color-text-3);
  transition: background var(--t-fast), color var(--t-fast);
}
.qty-input button:hover { background: var(--color-muted); color: var(--color-text); }
.qty-input input {
  width: 48px;
  height: 40px;
  text-align: center;
  border: none;
  background: transparent;
  font-weight: 600;
  font-size: var(--fs-md);
  color: var(--color-text);
}
.qty-input input::-webkit-inner-spin-button,
.qty-input input::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }

/* Checkbox / Radio premium */
.check-input {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  user-select: none;
}
.check-input input {
  appearance: none;
  -webkit-appearance: none;
  width: 20px; height: 20px;
  border: 1.5px solid var(--color-border-strong);
  border-radius: 6px;
  background: var(--color-surface);
  transition: all var(--t-fast);
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
}
.check-input input[type="radio"] { border-radius: 50%; }
.check-input input:hover { border-color: var(--color-primary); }
.check-input input:checked {
  background: var(--color-primary);
  border-color: var(--color-primary);
}
.check-input input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 12px; height: 6px;
  border-left: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: translateY(-1px) rotate(-45deg);
}
.check-input input[type="radio"]:checked::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  width: 8px; height: 8px;
  background: #fff;
  border-radius: 50%;
}

/* Switch toggle premium */
.switch {
  display: inline-block;
  width: 44px; height: 24px;
  position: relative;
}
.switch input {
  appearance: none;
  width: 100%; height: 100%;
  background: var(--color-border-strong);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--t-fast);
  margin: 0;
}
.switch input::after {
  content: "";
  position: absolute;
  top: 3px; left: 3px;
  width: 18px; height: 18px;
  background: #fff;
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  transition: transform var(--t-spring);
}
.switch input:checked { background: var(--color-primary); }
.switch input:checked::after { transform: translateX(20px); }

/* ============================================================ CHIPS / TAGS */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.375rem 0.75rem;
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--color-text-2);
  background: var(--color-muted);
  border: 1px solid transparent;
  border-radius: var(--radius-full);
  transition: all var(--t-fast);
  cursor: pointer;
  white-space: nowrap;
}
.chip:hover { background: var(--color-border); }
.chip.is-active,
.chip[aria-pressed="true"] {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-color: var(--color-primary);
  font-weight: 600;
}

.chip-pix    { background: var(--color-pix-soft); color: var(--color-pix); border-color: transparent; font-weight: 600; }
.chip-accent { background: var(--color-accent-soft); color: var(--color-accent); border-color: transparent; font-weight: 600; }
.chip-gold   { background: var(--color-gold-soft); color: var(--color-gold); border-color: transparent; font-weight: 600; }

/* ============================================================ ALERTS */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-muted);
  border-left: 3px solid var(--color-text-3);
  font-size: var(--fs-sm);
  color: var(--color-text);
}
.alert-info    { background: var(--color-primary-soft); border-color: var(--color-primary); }
.alert-success { background: var(--color-accent-soft);  border-color: var(--color-accent); }
.alert-warning { background: #FEF3C7; border-color: var(--color-warning); }
.alert-danger  { background: #FEE2E2; border-color: var(--color-danger); }

[data-theme="dark"] .alert-warning { background: rgba(245, 158, 11, .12); }
[data-theme="dark"] .alert-danger  { background: rgba(239, 68, 68, .12); }

.alert svg { width: 20px; height: 20px; flex-shrink: 0; margin-top: 1px; }
.alert-title { font-weight: 600; margin: 0 0 var(--space-1); color: var(--color-text); }

/* ============================================================ TOOLTIPS */
[data-tooltip] {
  position: relative;
}
[data-too