/* ============================================
   HEADER COMPONENTS - Theme Toggle & Language Selector
   ============================================ */

/* ============================================
   SMOOTH THEME TRANSITION - Apply to common elements
   ============================================ */

/* Native color-scheme support */
:root {
    color-scheme: light;
}

[data-theme="dark"] {
    color-scheme: dark;
}

/* Transição suave para elementos que mudam com o tema */
.navbar-custom,
.card,
.modal-content,
.dropdown-menu,
.form-control,
.form-select,
input[type="text"],
input[type="email"],
input[type="password"],
textarea,
.btn,
.alert {
    transition: background-color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                border-color 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* CSS Variables for Components */
:root {
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;

    /* Typography */
    --font-size-sm: 12px;
    --font-size-md: 14px;
    --font-size-lg: 16px;

    /* Component specific */
    --toggle-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Note: Colors are inherited from ThemeConfig component
   --brand-primary, --brand-primary-dark, --brand-primary-light
   --bg-primary, --bg-secondary, --text-primary, --text-secondary
   --border-color, --hover-bg, --brand-shadow, --brand-shadow-hover
*/

/* ============================================
   THEME TOGGLE
   ============================================ */

.header-theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--toggle-transition);
    position: relative;
    overflow: hidden;
    /* Optimize icon rendering */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.header-theme-toggle:hover {
    border-color: var(--brand-primary);
    background-color: var(--hover-bg);
    transform: scale(1.05);
}

/* Optimize GPU rendering during interaction */
.header-theme-toggle:hover i,
.header-theme-toggle:active i,
body.theme-transitioning .header-theme-toggle i {
    will-change: opacity, transform;
}

.header-theme-toggle:active {
    transform: scale(0.95);
}

.header-theme-toggle:focus {
    outline: 2px solid var(--brand-primary);
    outline-offset: 2px;
}

.header-theme-toggle i {
    font-size: 1.25rem;
    position: absolute;
    /* Prevent flickering during rotation */
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform-style: preserve-3d;
    -webkit-transform-style: preserve-3d;
    /* Transição separada para opacity e transform */
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0s linear 0.3s; /* Delay visibility até transição terminar */
}

/* Icon animations - Light Mode Visible */
.header-theme-toggle .theme-icon-light {
    opacity: 1;
    transform: rotate(0deg) scale(1);
    visibility: visible;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0s linear 0s; /* Sem delay quando aparece */
}

.header-theme-toggle .theme-icon-dark {
    opacity: 0;
    transform: rotate(180deg) scale(0);
    visibility: hidden;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0s linear 0.3s; /* Delay quando esconde */
}

/* Dark Mode - Icons Swap */
[data-theme="dark"] .header-theme-toggle .theme-icon-light {
    opacity: 0;
    transform: rotate(-180deg) scale(0);
    visibility: hidden;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0s linear 0.3s; /* Delay quando esconde */
}

[data-theme="dark"] .header-theme-toggle .theme-icon-dark {
    opacity: 1;
    transform: rotate(0deg) scale(1);
    visibility: visible;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.3s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0s linear 0s; /* Sem delay quando aparece */
}

/* Responsive */
@media (max-width: 768px) {
    .header-theme-toggle {
        width: 36px;
        height: 36px;
    }

    .header-theme-toggle i {
        font-size: 1.1rem;
    }
}

/* ============================================
   LANGUAGE SELECTOR
   ============================================ */

.header-language-selector {
    position: relative;
}

.header-language-selector .dropdown-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    min-width: 140px;
    height: 40px;
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: var(--font-size-md);
    font-weight: 500;
    cursor: pointer;
    transition: var(--toggle-transition);
    text-decoration: none;
}

.header-language-selector .dropdown-toggle:hover {
    border-color: var(--brand-primary);
    background-color: var(--hover-bg);
}

.header-language-selector .dropdown-toggle:focus {
    outline: 2px solid var(--brand-primary);
    outline-offset: 2px;
    border-color: var(--brand-primary);
}

.header-language-selector .dropdown-toggle::after {
    margin-left: auto;
    font-size: 0.7rem;
    transition: transform 0.3s ease;
}

.header-language-selector .dropdown-toggle[aria-expanded="true"]::after {
    transform: rotate(180deg);
}

/* Flag icon */
.header-language-selector .flag-icon {
    font-size: 1.25rem;
    line-height: 1;
    flex-shrink: 0;
}

/* Language name */
.header-language-selector .language-name {
    font-size: var(--font-size-md);
    font-weight: 500;
    white-space: nowrap;
}

/* Dropdown menu */
.header-language-selector .dropdown-menu {
    min-width: 180px;
    padding: var(--spacing-xs);
    margin-top: var(--spacing-xs);
    background-color: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 4px 16px var(--shadow-color);
    animation: slideDown 0.2s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Dropdown items */
.header-language-selector .dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: var(--font-size-md);
    text-decoration: none;
    transition: var(--toggle-transition);
    cursor: pointer;
    border: none;
    background: transparent;
    width: 100%;
    text-align: left;
}

.header-language-selector .dropdown-item:hover {
    background-color: var(--hover-bg);
    color: var(--brand-primary);
}

.header-language-selector .dropdown-item.active {
    background-color: var(--brand-primary);
    color: white;
    font-weight: 600;
}

.header-language-selector .dropdown-item.active:hover {
    background-color: var(--brand-primary-dark);
}

/* Check icon for active language */
.header-language-selector .dropdown-item .bi-check {
    margin-left: auto;
    font-size: 1.25rem;
    font-weight: bold;
}

/* Responsive - Hide text on mobile, show only flag */
@media (max-width: 768px) {
    .header-language-selector .dropdown-toggle {
        min-width: 48px;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .header-language-selector .language-name {
        display: none;
    }

    .header-language-selector .dropdown-toggle::after {
        display: none;
    }
}

/* ============================================
   HEADER ACTIONS CONTAINER
   ============================================ */

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Responsive gap adjustment */
@media (max-width: 768px) {
    .header-actions {
        gap: var(--spacing-xs);
    }
}

/* ============================================
   ACCESSIBILITY IMPROVEMENTS
   ============================================ */

/* Focus visible for keyboard navigation */
.header-theme-toggle:focus-visible,
.header-language-selector .dropdown-toggle:focus-visible,
.header-language-selector .dropdown-item:focus-visible {
    outline: 3px solid var(--brand-primary);
    outline-offset: 2px;
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    .header-theme-toggle,
    .header-theme-toggle i,
    .header-language-selector .dropdown-toggle,
    .header-language-selector .dropdown-toggle::after,
    .header-language-selector .dropdown-item {
        transition: none;
        animation: none;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .header-theme-toggle,
    .header-language-selector .dropdown-toggle {
        border-width: 3px;
    }
}