/**
 * BUTTON COMPONENT
 *
 * Componente de botões com suporte a:
 * - Variantes: Solid (Filled), Outline, Ghost, Link
 * - Estados: Default, Hover, Active, Disabled, Loading, Focus
 * - Tamanhos: xs, sm, md (padrão), lg, xl
 * - Com/sem ícone: Leading icon, Trailing icon, Icon only
 * - Dark mode completo
 * - Acessibilidade WCAG 2.1 AA
 * - Cores: Primary, Secondary, Success, Warning, Danger, Neutral
 *
 * Baseado no Design System Figma - Gales
 * @version 1.0.0
 * @date 2025-10-30
 */

/* ============================================
   BASE BUTTON STRUCTURE
   ============================================ */

.btn {
    /* Layout */
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;

    /* Sizing - Arenito Large (default) */
    height: 40px !important;
    padding: 8px 12px !important;

    /* Typography - Arenito P3 */
    font-family: var(--font-body, 'Inter'), sans-serif !important;
    font-size: 14px !important;
    font-weight: 500 !important;
    line-height: 24px !important;
    text-decoration: none !important;
    text-transform: none !important;
    white-space: nowrap !important;

    /* Appearance - Arenito radius-default */
    border: none !important;
    border-radius: 6px !important;
    outline: none !important;
    cursor: pointer !important;
    user-select: none;

    /* Transition - Arenito transition-base */
    transition: all 200ms ease-in-out !important;

    /* Prevent text selection */
    -webkit-tap-highlight-color: transparent;
}

.btn:hover {
    text-decoration: none !important;
}

.btn:focus-visible {
    outline: none;
}

/* ============================================
   VARIANTES - SOLID (FILLED)
   ============================================ */

/* Filled (Primary) - Arenito surface-base-brand-container-medium */
.btn-primary,
.btn-solid-primary,
.btn-secondary,
.btn-solid-secondary {
    background-color: var(--color-primary) !important;
    color: var(--color-neutral-100, #F6F6F9) !important;
    border: none !important;
}

.btn-primary:hover,
.btn-solid-primary:hover,
.btn-secondary:hover,
.btn-solid-secondary:hover {
    background-color: var(--color-primary-hover) !important;
    color: var(--color-neutral-100, #F6F6F9) !important;
}

.btn-primary:active,
.btn-solid-primary:active,
.btn-secondary:active,
.btn-solid-secondary:active {
    background-color: var(--color-primary-hover) !important;
}

/* Success Solid (Green) */
.btn-success,
.btn-solid-success {
    background-color: var(--color-success);
    color: var(--color-text-light);
    border: 1px solid var(--color-success);
}

.btn-success:hover,
.btn-solid-success:hover {
    background-color: var(--color-success-dark);
    border-color: var(--color-success-dark);
}

.btn-success:active,
.btn-solid-success:active {
    background-color: var(--color-success-dark);
    border-color: var(--color-success-dark);
    transform: scale(0.98);
}

/* Warning Solid (Yellow/Orange) */
.btn-warning,
.btn-solid-warning {
    background-color: var(--color-warning);
    color: var(--color-neutral-800);
    border: 1px solid var(--color-warning);
}

.btn-warning:hover,
.btn-solid-warning:hover {
    background-color: var(--color-warning-dark);
    border-color: var(--color-warning-dark);
}

.btn-warning:active,
.btn-solid-warning:active {
    background-color: var(--color-warning-dark);
    border-color: var(--color-warning-dark);
    transform: scale(0.98);
}

/* Danger Solid (Red) */
.btn-danger,
.btn-solid-danger {
    background-color: var(--color-danger);
    color: var(--color-text-light);
    border: 1px solid var(--color-danger);
}

.btn-danger:hover,
.btn-solid-danger:hover {
    background-color: var(--color-danger-dark);
    border-color: var(--color-danger-dark);
}

.btn-danger:active,
.btn-solid-danger:active {
    background-color: var(--color-danger-dark);
    border-color: var(--color-danger-dark);
    transform: scale(0.98);
}

/* Neutral/Light Solid (White) */
.btn-light,
.btn-solid-light {
    background-color: var(--color-text-light);
    color: var(--color-neutral-800);
    border: 1px solid var(--color-border);
}

.btn-light:hover,
.btn-solid-light:hover {
    background-color: var(--color-bg-secondary);
    border-color: var(--color-border);
}

.btn-light:active,
.btn-solid-light:active {
    background-color: var(--color-bg-tertiary);
    border-color: var(--color-border);
    transform: scale(0.98);
}

/* ============================================
   VARIANTES - OUTLINE
   ============================================ */

/* Outlined - Arenito border-base-neutral-default */
.btn-outline-primary,
.btn-outline-secondary,
.btn-outline {
    background-color: transparent !important;
    color: var(--color-text-primary, #12151F) !important;
    border: 1px solid var(--color-border, #CED3E2) !important;
}

.btn-outline-primary:hover,
.btn-outline-secondary:hover,
.btn-outline:hover {
    background-color: var(--color-neutral-200, #ECEDF2) !important;
    border-color: var(--color-border, #CED3E2) !important;
    color: var(--color-text-primary, #12151F) !important;
}

.btn-outline-primary:active,
.btn-outline-secondary:active,
.btn-outline:active {
    background-color: var(--color-neutral-200, #ECEDF2) !important;
    border-color: var(--color-border, #CED3E2) !important;
}

/* Success Outline */
.btn-outline-success {
    background-color: transparent;
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.btn-outline-success:hover {
    background-color: var(--color-success);
    color: var(--color-text-light);
    border-color: var(--color-success);
}

.btn-outline-success:active {
    background-color: var(--color-success-dark);
    color: var(--color-text-light);
    border-color: var(--color-success-dark);
    transform: scale(0.98);
}

/* Warning Outline */
.btn-outline-warning {
    background-color: transparent;
    color: var(--color-warning);
    border: 1px solid var(--color-warning);
}

.btn-outline-warning:hover {
    background-color: var(--color-warning);
    color: var(--color-neutral-800);
    border-color: var(--color-warning);
}

.btn-outline-warning:active {
    background-color: var(--color-warning-dark);
    color: var(--color-text-light);
    border-color: var(--color-warning-dark);
    transform: scale(0.98);
}

/* Danger Outline */
.btn-outline-danger {
    background-color: transparent;
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
}

.btn-outline-danger:hover {
    background-color: var(--color-danger);
    color: var(--color-text-light);
    border-color: var(--color-danger);
}

.btn-outline-danger:active {
    background-color: var(--color-danger-dark);
    color: var(--color-text-light);
    border-color: var(--color-danger-dark);
    transform: scale(0.98);
}

/* Light Outline (Cancelar/Fechar) - Arenito outlined */
.btn-outline-light {
    background-color: transparent !important;
    color: var(--color-text-primary, #12151F) !important;
    border: 1px solid var(--color-border, #CED3E2) !important;
}

.btn-outline-light:hover {
    background-color: var(--color-neutral-200, #ECEDF2) !important;
    color: var(--color-text-primary, #12151F) !important;
    border-color: var(--color-border, #CED3E2) !important;
}

.btn-outline-light:active {
    background-color: var(--color-neutral-200, #ECEDF2) !important;
    color: var(--color-text-primary, #12151F) !important;
    border-color: var(--color-border, #CED3E2) !important;
}

/* ============================================
   VARIANTES - GHOST (NO BORDER)
   ============================================ */

/* Ghost - Arenito surface-base-neutral-container-hover */
.btn-ghost-primary,
.btn-ghost-secondary,
.btn-ghost {
    background-color: transparent;
    color: var(--color-text-primary, #12151F);
    border: none;
}

.btn-ghost-primary:hover,
.btn-ghost-secondary:hover,
.btn-ghost:hover {
    background-color: var(--color-neutral-200, #ECEDF2) !important;
}

.btn-ghost-primary:active,
.btn-ghost-secondary:active,
.btn-ghost:active {
    background-color: var(--color-neutral-200, #ECEDF2) !important;
}

/* Success Ghost */
.btn-ghost-success {
    background-color: transparent;
    color: var(--color-success);
    border: 1px solid transparent;
}

.btn-ghost-success:hover {
    background-color: rgba(81, 144, 0, 0.05); /* RGBA of --color-success (#519000) */
    border-color: transparent;
}

.btn-ghost-success:active {
    background-color: rgba(81, 144, 0, 0.1); /* RGBA of --color-success (#519000) */
    border-color: transparent;
    transform: scale(0.98);
}

/* Warning Ghost */
.btn-ghost-warning {
    background-color: transparent;
    color: var(--color-warning);
    border: 1px solid transparent;
}

.btn-ghost-warning:hover {
    background-color: rgba(233, 189, 0, 0.05); /* RGBA of --color-warning (#E9BD00) */
    border-color: transparent;
}

.btn-ghost-warning:active {
    background-color: rgba(233, 189, 0, 0.1); /* RGBA of --color-warning (#E9BD00) */
    border-color: transparent;
    transform: scale(0.98);
}

/* Danger Ghost */
.btn-ghost-danger {
    background-color: transparent;
    color: var(--color-danger);
    border: 1px solid transparent;
}

.btn-ghost-danger:hover {
    background-color: rgba(201, 10, 10, 0.05); /* RGBA of --color-danger (#C90A0A) */
    border-color: transparent;
}

.btn-ghost-danger:active {
    background-color: rgba(201, 10, 10, 0.1); /* RGBA of --color-danger (#C90A0A) */
    border-color: transparent;
    transform: scale(0.98);
}

/* Light Ghost */
.btn-ghost-light {
    background-color: transparent;
    color: var(--color-text-secondary);
    border: 1px solid transparent;
}

.btn-ghost-light:hover {
    background-color: rgba(122, 131, 159, 0.1); /* RGBA of --color-text-muted (#7A839F) */
    border-color: transparent;
}

.btn-ghost-light:active {
    background-color: rgba(122, 131, 159, 0.2); /* RGBA of --color-text-muted (#7A839F) */
    border-color: transparent;
    transform: scale(0.98);
}

/* ============================================
   VARIANTES - LINK
   ============================================ */

.btn-link {
    background-color: transparent;
    color: var(--color-primary);
    border: none;
    padding: 0;
    height: auto;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.btn-link:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

.btn-link:active {
    color: var(--color-primary-hover);
    transform: none;
}

.btn-link:focus-visible {
    outline-offset: 4px;
}

/* Link variants */
.btn-link-primary {
    background-color: transparent;
    color: var(--color-neutral-800);
    border: none;
    padding: 0;
    height: auto;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.btn-link-primary:hover {
    color: var(--color-neutral-700);
}

.btn-link-danger {
    background-color: transparent;
    color: var(--color-danger);
    border: none;
    padding: 0;
    height: auto;
    text-decoration: underline;
    text-underline-offset: 2px;
}

.btn-link-danger:hover {
    color: var(--color-danger-dark);
}

/* ============================================
   TAMANHOS
   ============================================ */

/* Small - Arenito 32px */
.btn-sm,
.btn-xs {
    height: 32px;
    padding: 4px 12px;
    font-size: 14px;
    line-height: 24px;
    gap: 8px;
}

/* Large (default) - já definido na base (40px) */
.btn-lg {
    height: 40px;
    padding: 8px 12px;
    font-size: 14px;
    line-height: 24px;
    gap: 8px;
}

/* Extra Large - mantido para compatibilidade */
.btn-xl {
    height: 40px;
    padding: 8px 12px;
    font-size: 14px;
    line-height: 24px;
    gap: 8px;
}

/* ============================================
   BOTÕES COM ÍCONES
   ============================================ */

/* Icon only buttons - Arenito */
.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    justify-content: center;
}

.btn-icon.btn-xs {
    width: 24px;
    height: 24px;
}

.btn-icon.btn-sm {
    width: 32px;
    height: 32px;
}

.btn-icon.btn-lg {
    width: 40px;
    height: 40px;
}

.btn-icon.btn-xl {
    width: 40px;
    height: 40px;
}

/* Icon sizes within buttons - Arenito */
.btn-icon-content {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.btn-xs .btn-icon-content {
    width: 12px;
    height: 12px;
}

.btn-sm .btn-icon-content {
    width: 16px;
    height: 16px;
}

.btn-lg .btn-icon-content {
    width: 18px;
    height: 18px;
}

.btn-xl .btn-icon-content {
    width: 18px;
    height: 18px;
}

.btn-icon-content i {
    font-size: inherit;
    line-height: 1;
}

/* Leading and trailing icons */
.btn-icon-leading {
    order: -1;
}

.btn-icon-trailing {
    order: 1;
}

/* ============================================
   ESTADOS ESPECIAIS
   ============================================ */

/* Disabled - Arenito: NÃO usa opacity, usa cores específicas */
.btn:disabled,
.btn.btn-disabled {
    background-color: var(--color-neutral-300, #E6E8EF) !important;
    color: var(--color-neutral-500, #7A839F) !important;
    border-color: var(--color-neutral-300, #E6E8EF) !important;
    cursor: not-allowed;
    pointer-events: none;
    opacity: 1;
}

/* Loading */
.btn.btn-loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn.btn-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-radius: 50%;
    border-top-color: transparent;
    border-right-color: transparent;
    animation: btn-spinner 0.6s linear infinite;
    color: inherit;
    opacity: 1;
}

.btn-primary.btn-loading::after,
.btn-secondary.btn-loading::after,
.btn-success.btn-loading::after,
.btn-danger.btn-loading::after {
    border-color: var(--color-text-light);
    border-top-color: transparent;
    border-right-color: transparent;
}

.btn-light.btn-loading::after,
.btn-outline.btn-loading::after,
.btn-ghost.btn-loading::after {
    border-color: currentColor;
    border-top-color: transparent;
    border-right-color: transparent;
}

@keyframes btn-spinner {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Block (full width) */
.btn-block {
    display: flex;
    width: 100%;
}

/* ============================================
   BUTTON GROUPS
   ============================================ */

.btn-group {
    display: inline-flex;
    gap: 0;
}

.btn-group .btn {
    border-radius: 0;
    margin-left: -1px;
}

.btn-group .btn:first-child {
    border-top-left-radius: var(--radius-md, 8px);
    border-bottom-left-radius: var(--radius-md, 8px);
    margin-left: 0;
}

.btn-group .btn:last-child {
    border-top-right-radius: var(--radius-md, 8px);
    border-bottom-right-radius: var(--radius-md, 8px);
}

.btn-group .btn:focus {
    z-index: 1;
}

/* Vertical Button Group */
.btn-group-vertical {
    display: inline-flex;
    flex-direction: column;
    gap: 0;
}

.btn-group-vertical .btn {
    border-radius: 0;
    margin-top: -1px;
    width: 100%;
}

.btn-group-vertical .btn:first-child {
    border-top-left-radius: var(--radius-md, 8px);
    border-top-right-radius: var(--radius-md, 8px);
    margin-top: 0;
}

.btn-group-vertical .btn:last-child {
    border-bottom-left-radius: var(--radius-md, 8px);
    border-bottom-right-radius: var(--radius-md, 8px);
}

/* ============================================
   DARK MODE
   ============================================ */

/* Filled in Dark Mode - dark accent-300 (#476DF5), primitivas não invertem */
.dark .btn-primary,
.dark .btn-solid-primary,
.dark .btn-secondary,
.dark .btn-solid-secondary {
    background-color: #476DF5;
    color: var(--color-neutral-100, #F6F6F9);
}

.dark .btn-primary:hover,
.dark .btn-solid-primary:hover,
.dark .btn-secondary:hover,
.dark .btn-solid-secondary:hover {
    background-color: #153193;
}

.dark .btn-primary:active,
.dark .btn-solid-primary:active,
.dark .btn-secondary:active,
.dark .btn-solid-secondary:active {
    background-color: #153193;
}

/* Success in Dark Mode */
.dark .btn-success,
.dark .btn-solid-success,
[data-theme="dark"] .btn-success,
[data-theme="dark"] .btn-solid-success {
    background-color: var(--color-success);
    border-color: var(--color-success);
}

.dark .btn-success:hover,
.dark .btn-solid-success:hover,
[data-theme="dark"] .btn-success:hover,
[data-theme="dark"] .btn-solid-success:hover {
    background-color: var(--color-success-dark);
    border-color: var(--color-success-dark);
}

.dark .btn-success:active,
.dark .btn-solid-success:active,
[data-theme="dark"] .btn-success:active,
[data-theme="dark"] .btn-solid-success:active {
    background-color: var(--color-success-dark);
    border-color: var(--color-success-dark);
}

/* Warning in Dark Mode */
.dark .btn-warning,
.dark .btn-solid-warning,
[data-theme="dark"] .btn-warning,
[data-theme="dark"] .btn-solid-warning {
    background-color: var(--color-warning);
    border-color: var(--color-warning);
}

.dark .btn-warning:hover,
.dark .btn-solid-warning:hover,
[data-theme="dark"] .btn-warning:hover,
[data-theme="dark"] .btn-solid-warning:hover {
    background-color: var(--color-warning-dark);
    border-color: var(--color-warning-dark);
}

.dark .btn-warning:active,
.dark .btn-solid-warning:active,
[data-theme="dark"] .btn-warning:active,
[data-theme="dark"] .btn-solid-warning:active {
    background-color: var(--color-warning-dark);
    border-color: var(--color-warning-dark);
}

/* Danger in Dark Mode */
.dark .btn-danger,
.dark .btn-solid-danger,
[data-theme="dark"] .btn-danger,
[data-theme="dark"] .btn-solid-danger {
    background-color: var(--color-danger);
    border-color: var(--color-danger);
}

.dark .btn-danger:hover,
.dark .btn-solid-danger:hover,
[data-theme="dark"] .btn-danger:hover,
[data-theme="dark"] .btn-solid-danger:hover {
    background-color: var(--color-danger-dark);
    border-color: var(--color-danger-dark);
}

.dark .btn-danger:active,
.dark .btn-solid-danger:active,
[data-theme="dark"] .btn-danger:active,
[data-theme="dark"] .btn-solid-danger:active {
    background-color: var(--color-danger-dark);
    border-color: var(--color-danger-dark);
}

/* Light in Dark Mode */
.dark .btn-light,
.dark .btn-solid-light,
[data-theme="dark"] .btn-light,
[data-theme="dark"] .btn-solid-light {
    background-color: var(--color-neutral-700);
    color: var(--color-neutral-300);
    border-color: var(--color-neutral-600);
}

.dark .btn-light:hover,
.dark .btn-solid-light:hover,
[data-theme="dark"] .btn-light:hover,
[data-theme="dark"] .btn-solid-light:hover {
    background-color: var(--color-neutral-600);
    border-color: var(--color-text-secondary);
}

.dark .btn-light:active,
.dark .btn-solid-light:active,
[data-theme="dark"] .btn-light:active,
[data-theme="dark"] .btn-solid-light:active {
    background-color: var(--color-text-secondary);
    border-color: var(--color-neutral-500);
}

/* Outlined/Ghost dark mode - tokens semânticos trocam automaticamente
   --color-text-primary, --color-border, --color-bg-tertiary já mudam no dark */

/* Disabled in Dark Mode - dark neutral-300 (#1D2333), primitivas não invertem */

/* Link in Dark Mode */
.dark .btn-link,
[data-theme="dark"] .btn-link {
    color: var(--color-primary);
}

.dark .btn-link:hover,
[data-theme="dark"] .btn-link:hover {
    color: var(--color-primary-hover);
}

.dark .btn-link-primary,
[data-theme="dark"] .btn-link-primary {
    color: var(--color-neutral-300);
}

.dark .btn-link-primary:hover,
[data-theme="dark"] .btn-link-primary:hover {
    color: var(--color-text-light);
}

.dark .btn-link-danger,
[data-theme="dark"] .btn-link-danger {
    color: var(--color-danger);
}

.dark .btn-link-danger:hover,
[data-theme="dark"] .btn-link-danger:hover {
    color: var(--color-danger-dark);
}

/* ============================================
   RESPONSIVIDADE
   ============================================ */

@media (max-width: 768px) {
    .btn {
        min-height: 40px; /* Arenito Large */
    }

    .btn-xs,
    .btn-sm {
        min-height: 32px; /* Arenito Small */
    }

    .btn-block-mobile {
        display: flex;
        width: 100%;
    }

    .btn-group {
        flex-wrap: wrap;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .btn {
        border: 1px solid #000;
        background: #fff !important;
        color: #000 !important;
        box-shadow: none !important;
    }
}

/* ============================================
   ACESSIBILIDADE
   ============================================ */

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .btn {
        border-width: 2px;
    }

    .btn:focus-visible {
        outline-width: 3px;
        outline-offset: 3px;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .btn {
        transition: none;
    }

    .btn:active {
        transform: none;
    }

    .btn.btn-loading::after {
        animation: none;
        border: none;
        content: '⏳';
        font-size: 16px;
    }
}

/* Screen Reader Only */
.btn-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}