/* ========== LAYOUT CSS - SpotiTube ========== */
/* Archivo: public/css/layout.css */
/* Descripción: Estilos de estructura y contenedores principales */

/* ========== CONTENEDOR PRINCIPAL ========== */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* ========== HEADER ========== */
.header {
    position: fixed;
    top: 0;
    right: 0;
    z-index: var(--z-header);
    padding: var(--spacing-md);
}

/* ========== CONTENIDO PRINCIPAL ========== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-xl) var(--spacing-md);
    max-width: var(--max-content-width);
    margin: 0 auto;
    width: 100%;
}

/* ========== TÍTULO DE LA APP ========== */
.app-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.app-title h1 {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--spotify-green) 0%, var(--spotify-green-hover) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.app-title p {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
}

/* ========== LOGOS ========== */
.welcome-logo {
    width: auto;
    height: var(--logo-size-welcome);
    max-width: 100%;
    max-height: var(--logo-size-welcome);
    margin-bottom: var(--spacing-lg);
    margin-left: auto;
    margin-right: auto;
    display: block;
    border-radius: 77px;
    object-fit: contain;
}

.auth-logo {
    width: auto;
    height: var(--logo-size-auth);
    max-width: 100%;
    max-height: var(--logo-size-auth);
    margin-bottom: var(--spacing-md);
    margin-left: auto;
    margin-right: auto;
    display: block;
    border-radius: 59px;
    object-fit: contain;
}

.main-logo {
    width: auto;
    height: var(--logo-size-main);
    max-width: 100%;
    max-height: var(--logo-size-main);
    margin-bottom: var(--spacing-sm);
    margin-left: auto;
    margin-right: auto;
    display: block;
    border-radius: 39px;
    object-fit: contain;
}

/* ========== SECCIONES DE FUNCIONALIDAD ========== */
.functionality-section {
    background: rgba(33, 33, 33, 0.6);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-xl);
    border: 1px solid rgba(29, 185, 84, 0.2);
    width: 100%;
}

.section-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--spotify-green);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.section-description {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* ========== CARGA DE PLAYLIST/ARTISTAS ========== */
.playlist-load-section {
    margin-bottom: var(--spacing-xl);
}

.playlist-load-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

/* ========== ITEM CARGADO ========== */
.loaded-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: rgba(29, 185, 84, 0.1);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-small);
    border: 1px solid var(--spotify-green);
    position: relative;
    max-width: 100%;
}

.loaded-item-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 24px;
    height: 24px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: 50%;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-base);
    line-height: 1;
    transition: all var(--transition-fast);
}

.loaded-item-close:hover {
    background: var(--error-color);
    color: white;
}

.loaded-item img {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-small);
    object-fit: cover;
    flex-shrink: 0;
}

.loaded-item-info {
    flex: 1;
    min-width: 0;
}

.loaded-item-info h4 {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.loaded-item-info p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: 0;
}

.loaded-artists-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

/* ========== SELECCIÓN DE MODO ========== */
.mode-selection {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    justify-content: center;
    flex-wrap: wrap;
}

.mode-option {
    flex: 1;
    min-width: 200px;
    padding: var(--spacing-md);
    background: rgba(33, 33, 33, 0.9);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
}

.mode-option:hover {
    border-color: var(--spotify-green);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.mode-option.selected {
    border-color: var(--spotify-green);
    background: rgba(29, 185, 84, 0.1);
}

.mode-option.youtube-mode {
    border-color: rgba(255, 0, 0, 0.3);
    background: rgba(255, 0, 0, 0.05);
}

.mode-option.youtube-mode:hover {
    border-color: var(--youtube-red);
    box-shadow: 0 4px 8px rgba(255, 0, 0, 0.2);
}

.mode-option.youtube-mode.selected {
    border-color: var(--youtube-red);
    background: rgba(255, 0, 0, 0.1);
}

.mode-option-title {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.mode-option-desc {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-style: italic;
}

/* ========== FOOTER ========== */
.footer {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: var(--spacing-xl);
}

.footer p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer-link {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--spotify-green);
}

.welcome-footer-links {
    margin-top: var(--spacing-xl);
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    align-items: center;
}

.footer-separator {
    color: var(--text-muted);
}

/* ========== CONTAINER DE MENSAJES ========== */
#messageContainer {
    position: fixed;
    top: 80px;
    right: var(--spacing-md);
    z-index: var(--z-modal);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 400px;
}