/* ===================================================
   BASE.CSS — Modern reset + accessibility + utilities
   =================================================== */

/* --- Reset --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  background-image: radial-gradient(circle at top center, rgba(186, 160, 127, 0.08) 0%, transparent 60%);
  color: var(--color-text);
  line-height: var(--line-height);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul,
ol {
  list-style: none;
}

/* --- Focus styles (accessibility) --- */
:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

:focus:not(:focus-visible) {
  outline: none;
}

/* --- 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;
}

/* ===================================================
   BUTTONS
   =================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  min-height: var(--btn-min-height);
  padding: 0 var(--space-lg);
  border-radius: var(--radius);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  border: none;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
  user-select: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary */
.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-glow);
}

.btn-primary:active:not(:disabled) {
  transform: scale(0.97);
}

/* WhatsApp */
.btn-whatsapp {
  background: var(--color-whatsapp);
  color: #ffffff;
  font-size: var(--font-size-lg);
  min-height: 64px;
  padding: 0 var(--space-xl);
  border-radius: var(--radius-lg);
  animation: pulse-whatsapp 2s ease-in-out infinite;
}

.btn-whatsapp:hover:not(:disabled) {
  background: var(--color-whatsapp-hover);
  box-shadow: 0 0 24px rgba(37, 211, 102, 0.4);
}

.btn-whatsapp:active:not(:disabled) {
  transform: scale(0.97);
}

.btn-whatsapp:disabled {
  animation: none;
}

/* Secondary */
.btn-secondary {
  background: var(--color-surface-solid);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-surface-hover);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.btn-secondary:active:not(:disabled) {
  transform: scale(0.97);
}

/* Danger */
.btn-danger {
  background: transparent;
  border: 2px solid var(--color-danger);
  color: var(--color-danger);
}

.btn-danger:hover:not(:disabled) {
  background: var(--color-danger);
  color: #ffffff;
}

.btn-danger:active:not(:disabled) {
  transform: scale(0.97);
}

/* Ghost */
.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-surface-hover);
}

/* ===================================================
   SCROLLBAR (WebKit)
   =================================================== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ===================================================
   REDUCED MOTION
   =================================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ===================================================
   TOAST NOTIFICATIONS
   =================================================== */
.toast-container {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  box-shadow: var(--shadow-md);
  animation: slideInToast 0.35s ease forwards;
  max-width: 360px;
  border-left: 4px solid var(--color-border);
}

.toast-success {
  border-left-color: var(--color-success);
}

.toast-error {
  border-left-color: var(--color-danger);
}

.toast.toast-exit {
  animation: slideOutToast 0.3s ease forwards;
}

/* ===================================================
   KEYFRAMES
   =================================================== */
@keyframes pulse-whatsapp {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.4);
  }
  50% {
    box-shadow: 0 0 0 12px rgba(37, 211, 102, 0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInToast {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideOutToast {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}