/* ===
   Traductor de Lengua de Señas - Hoja de Estilos
   === */

/* --- 1. Variables y Estilos Globales --- */
:root {
    --color-primary: #005f73;
    --color-secondary: #0096c7;
    --color-accent: #ee9b00;
    --color-danger: #ae2012;
    --color-success: #2a9d8f;
    --color-light: #f8f9fa;
    --color-dark: #343a40;
    --color-text: #212529;
    --color-text-muted: #6c757d;
    --color-bg: #e9ecef;
    --color-white: #ffffff;

    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition-speed: 0.3s;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
}

body {
    font-family: var(--font-family-base);
    line-height: var(--line-height-base);
    background-color: var(--color-bg);
    color: var(--color-text);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- 2. Layout y Contenedor --- */
.container {
    width: 90%;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

main.container {
    flex: 1;
    padding-top: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
}

.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;
}

/* --- 3. Componentes Reutilizables --- */

/* Card */
.card {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.card__title {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

/* Button */
.button {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

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

.button--primary {
    background-color: var(--color-secondary);
    color: var(--color-white);
}
.button--primary:hover:not(:disabled) {
    background-color: var(--color-primary);
    transform: translateY(-2px);
}

.button--secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.button--secondary:hover:not(:disabled) {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.button--tertiary {
    background-color: transparent;
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.7);
}
.button--tertiary:hover:not(:disabled) {
    background-color: var(--color-white);
    color: var(--color-primary);
}

.button--danger {
    background-color: var(--color-danger);
    color: var(--color-white);
}
.button--danger:hover:not(:disabled) {
    background-color: #8b1a0e;
}

.button--icon {
    background-color: var(--color-light);
    color: var(--color-dark);
    border-color: #ddd;
}
.button--icon:hover:not(:disabled) {
    background-color: #ddd;
}

/* Modal */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-md);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-speed) ease, visibility var(--transition-speed) ease;
}
.modal[aria-hidden="false"] {
    opacity: 1;
    visibility: visible;
}

.modal__backdrop {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.6);
}

.modal__dialog {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 700px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    z-index: 1;
    transform: scale(0.95);
    transition: transform var(--transition-speed) ease;
}
.modal[aria-hidden="false"] .modal__dialog {
    transform: scale(1);
}

.modal__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-bg);
}

.modal__title {
    font-size: 1.25rem;
    color: var(--color-primary);
}

.modal__close {
    font-size: 2rem;
    font-weight: bold;
    color: var(--color-text-muted);
    background: none;
    border: none;
    cursor: pointer;
    line-height: 1;
}

.modal__body {
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.modal__description {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

.modal__subtitle {
    font-size: 1.1rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-dark);
}

.modal__footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--color-bg);
    background-color: var(--color-light);
}

/* --- 4. Estilos de Secciones Específicas --- */

/* Header */
.header {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-lg) 0;
    text-align: center;
}
.header__title { font-size: 2rem; }
.header__subtitle { font-size: 1rem; opacity: 0.9; }

/* Footer */
.footer {
    background-color: var(--color-dark);
    color: var(--color-white);
    padding: var(--spacing-lg) 0;
    margin-top: auto;
}
.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

/* Translator Section */
.translator__form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}
.translator__textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    font-family: var(--font-family-base);
    border-radius: var(--border-radius);
    border: 1px solid #ccc;
    resize: vertical;
    min-height: 100px;
}
.translator__actions {
    display: flex;
    gap: var(--spacing-md);
}

/* Output Section */
.view-switcher {
    display: flex;
    gap: var(--spacing-md);
    background-color: var(--color-light);
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
}
.view-switcher__label {
    padding: var(--spacing-sm);
    cursor: pointer;
}
.view-switcher input {
    display: none;
}
.view-switcher input:checked + .view-switcher__label {
    background-color: var(--color-white);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    border-radius: 6px;
}

[role="region"] {
    display: none;
}
:where(#signs-container, #step-player-container):not([style*="display: none"]) + [role="region"] {
    display: block;
}

#signs-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
    min-height: 150px;
}

#step-player-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    min-height: 150px;
}

.output__step-display {
    width: 100%;
    display: flex;
    justify-content: center;
}

.output__step-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.output__step-counter {
    font-weight: 500;
    font-size: 1.1rem;
    min-width: 60px;
    text-align: center;
}

/* Sign Element (reusable in grid and modals) */
.sign {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--color-light);
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    width: 130px;
    text-align: center;
}
.sign__image {
    width: 100px;
    height: 100px;
    object-fit: cover;
    background-color: var(--color-bg);
    border-radius: 6px;
}
.sign__label {
    font-weight: 500;
    text-transform: capitalize;
    word-break: break-all;
}
.sign__fallback-text {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100px;
    height: 100px;
    background-color: var(--color-bg);
    border-radius: 6px;
    font-style: italic;
    color: var(--color-text-muted);
    padding: var(--spacing-sm);
}
.sign__edit-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 28px;
    height: 28px;
    font-size: 1rem;
    border-radius: 50%;
    border: 1px solid #ccc;
    background-color: var(--color-white);
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-speed) ease;
}
.sign:hover .sign__edit-btn {
    opacity: 1;
}

#modal-signs-grid .sign {
    cursor: pointer;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}
#modal-signs-grid .sign:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow);
}

/* Dictionary Management Form */
.dict-form {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}
.dict-form__input {
    flex: 1 1 200px;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid #ccc;
    border-radius: var(--border-radius);
}

#dict-list-container {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--color-bg);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm);
    background-color: var(--color-bg);
}

.dict-entry {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-bg);
}
.dict-entry:last-child { border-bottom: none; }

.dict-entry__word {
    font-weight: 500;
    flex: 1 1 100px;
    word-break: break-all;
}
.dict-entry__url {
    flex: 3 1 300px;
    padding: var(--spacing-sm);
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 0.9rem;
}
.dict-entry__delete-btn {
    background: var(--color-danger);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    cursor: pointer;
    font-weight: bold;
}

/* --- 5. Accesibilidad y Media Queries --- */

/* Focus States */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    box-shadow: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    .card__header {
        flex-direction: column;
        align-items: flex-start;
    }
    .translator__actions {
        flex-direction: column;
        align-items: stretch;
    }
    .footer .container {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    html { font-size: 14px; }
    .header__title { font-size: 1.8rem; }
    .card { padding: var(--spacing-md); }
}