/* =========================================================================
   MODERN LANGUAGE SWITCHER COMPONENT
   Professional UX/UI Design - Optimized for Login Page
   Mobile First | Tablet | Desktop | Accessibility Ready
   ========================================================================= */

/* === CSS VARIABLES === */
:root {
    /* Language Switcher Colors */
    --ls-bg: rgba(255, 255, 255, 0.1);
    --ls-bg-hover: rgba(255, 255, 255, 0.15);
    --ls-bg-active: rgba(255, 255, 255, 0.2);
    --ls-border: rgba(255, 255, 255, 0.2);
    --ls-text: #ffffff;
    --ls-text-secondary: rgba(255, 255, 255, 0.8);
    --ls-dropdown-bg: rgba(15, 23, 42, 0.95);
    --ls-dropdown-border: rgba(255, 255, 255, 0.15);
    --ls-option-hover: rgba(59, 130, 246, 0.15);
    --ls-option-selected: rgba(59, 130, 246, 0.25);
    
    /* Animations */
    --ls-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --ls-dropdown-animation: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
    
    /* Shadows */
    --ls-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --ls-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* === MAIN COMPONENT === */
.language-switcher-modern {
    position: relative;
    display: inline-block;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    z-index: 1000;
}

/* === MAIN BUTTON === */
.language-button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--ls-bg);
    border: 1px solid var(--ls-border);
    border-radius: 8px;
    color: var(--ls-text);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--ls-transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--ls-shadow);
    min-width: 120px;
    outline: none;
}

.language-button:hover {
    background: var(--ls-bg-hover);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
    box-shadow: var(--ls-shadow-lg);
}

.language-button:focus {
    outline: 2px solid rgba(59, 130, 246, 0.5);
    outline-offset: 2px;
}

.language-button:active {
    background: var(--ls-bg-active);
    transform: translateY(0);
}

.language-button.open {
    background: var(--ls-bg-active);
    border-color: rgba(59, 130, 246, 0.5);
}

/* === FLAG CONTAINER === */
.flag-container {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 18px;
    border-radius: 3px;
    overflow: hidden;
    flex-shrink: 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.flag-container svg,
.flag-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* === LANGUAGE TEXT === */
.language-text {
    flex: 1;
    text-align: left;
    white-space: nowrap;
    color: var(--ls-text);
    font-weight: 500;
    letter-spacing: 0.025em;
}

/* === CHEVRON ICON === */
.chevron-icon {
    width: 16px;
    height: 16px;
    color: var(--ls-text-secondary);
    transition: var(--ls-transition);
    flex-shrink: 0;
}

.language-button.open .chevron-icon {
    transform: rotate(180deg);
    color: var(--ls-text);
}

/* === DROPDOWN MENU === */
.language-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 200px;
    background: var(--ls-dropdown-bg);
    border: 1px solid var(--ls-dropdown-border);
    border-radius: 8px;
    box-shadow: var(--ls-shadow-lg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.95);
    transition: all var(--ls-dropdown-animation);
    z-index: 1001;
    overflow: hidden;
}

.language-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

/* === DROPDOWN OPTIONS === */
.language-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: transparent;
    border: none;
    color: var(--ls-text);
    cursor: pointer;
    transition: var(--ls-transition);
    width: 100%;
    text-align: left;
    outline: none;
    position: relative;
}

.language-option:hover {
    background: var(--ls-option-hover);
}

.language-option:focus {
    background: var(--ls-option-hover);
    outline: 2px solid rgba(59, 130, 246, 0.5);
    outline-offset: -2px;
}

.language-option.selected {
    background: var(--ls-option-selected);
    color: #ffffff;
}

.language-option.selected::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: #3b82f6;
}

/* === LANGUAGE INFO === */
.language-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.language-name {
    font-size: 14px;
    font-weight: 500;
    line-height: 1.2;
    color: var(--ls-text);
}

.language-code {
    font-size: 12px;
    color: var(--ls-text-secondary);
    line-height: 1;
}

/* === CHECK ICON === */
.check-icon {
    width: 16px;
    height: 16px;
    color: #10b981;
    flex-shrink: 0;
}

/* === RESPONSIVE DESIGN === */

/* Mobile Portrait */
@media (max-width: 480px) {
    .language-switcher-modern {
        position: fixed;
        top: 16px;
        right: 16px;
        z-index: 2000;
    }
    
    .language-button {
        padding: 10px 12px;
        min-width: 100px;
        font-size: 13px;
    }
    
    .language-dropdown {
        right: 0;
        min-width: 180px;
        top: calc(100% + 6px);
    }
    
    .language-option {
        padding: 14px 16px;
    }
    
    .language-text {
        display: none; /* Solo mostrar bandera en móvil */
    }
    
    .language-button {
        min-width: auto;
        width: 48px;
        height: 48px;
        padding: 12px;
        border-radius: 12px;
        justify-content: center;
    }
    
    .language-option .language-text {
        display: block; /* Mostrar en dropdown */
    }
}

/* Tablet */
@media (min-width: 481px) and (max-width: 768px) {
    .language-button {
        padding: 9px 14px;
        font-size: 14px;
        min-width: 110px;
    }
    
    .language-dropdown {
        min-width: 190px;
    }
}

/* Desktop and larger */
@media (min-width: 769px) {
    .language-button:hover .language-text {
        color: #ffffff;
    }
    
    .language-dropdown {
        min-width: 220px;
    }
}

/* === ACCESSIBILITY ENHANCEMENTS === */

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --ls-bg: rgba(0, 0, 0, 0.8);
        --ls-bg-hover: rgba(0, 0, 0, 0.9);
        --ls-border: #ffffff;
        --ls-text: #ffffff;
        --ls-dropdown-bg: #000000;
        --ls-dropdown-border: #ffffff;
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .language-button,
    .language-dropdown,
    .language-option,
    .chevron-icon {
        transition: none;
    }
    
    .language-button:hover {
        transform: none;
    }
}

/* Dark mode enhancements */
@media (prefers-color-scheme: dark) {
    :root {
        --ls-bg: rgba(15, 23, 42, 0.8);
        --ls-bg-hover: rgba(15, 23, 42, 0.9);
        --ls-dropdown-bg: rgba(15, 23, 42, 0.95);
    }
}

/* === ANIMATIONS === */
@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes slideOutUp {
    from {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    to {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }
}

/* === FOCUS MANAGEMENT === */
.language-switcher-modern:focus-within .language-button {
    border-color: rgba(59, 130, 246, 0.5);
}

/* === PRINT STYLES === */
@media print {
    .language-switcher-modern {
        display: none;
    }
}

/* === LEGACY SUPPORT === */
@supports not (backdrop-filter: blur(10px)) {
    .language-button {
        background: rgba(15, 23, 42, 0.9);
    }
    
    .language-dropdown {
        background: rgba(15, 23, 42, 0.98);
    }
}

/* === LOADING STATE === */
.language-switcher-modern.loading .language-button {
    pointer-events: none;
    opacity: 0.7;
}

.language-switcher-modern.loading .language-text::after {
    content: '...';
    animation: dots 1.5s steps(5, end) infinite;
}

@keyframes dots {
    0%, 20% {
        color: transparent;
        text-shadow: .25em 0 0 transparent, .5em 0 0 transparent;
    }
    40% {
        color: white;
        text-shadow: .25em 0 0 transparent, .5em 0 0 transparent;
    }
    60% {
        text-shadow: .25em 0 0 white, .5em 0 0 transparent;
    }
    80%, 100% {
        text-shadow: .25em 0 0 white, .5em 0 0 white;
    }
}

/* === PERFORMANCE OPTIMIZATIONS === */
.language-button,
.language-dropdown {
    will-change: transform, opacity;
}

.language-option {
    will-change: background-color;
}

/* === RTL SUPPORT === */
[dir="rtl"] .language-dropdown {
    right: auto;
    left: 0;
}

[dir="rtl"] .language-option.selected::before {
    left: auto;
    right: 0;
}

/* === ENHANCED FOCUS INDICATORS === */
.language-button:focus-visible {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
    border-color: #3b82f6;
}

.language-option:focus-visible {
    outline: 2px solid #3b82f6;
    outline-offset: -2px;
    background: var(--ls-option-hover);
}

/* === ERROR STATES === */
.language-switcher-modern.error .language-button {
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.language-switcher-modern.error .language-text {
    color: #fca5a5;
}