/**
 * Custom Scrollbar - Bologna Marathon
 * Sistema scrollbar personalizzate ottimizzato per performance
 * 
 * File: assets/css/core/scrollbar.css
 */

/* ========================================
   SCROLLBAR GLOBALE
   ======================================== */

/* Modern browsers (Chrome, Edge, Safari) */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

/* Rimuove le freccette (arrows/buttons) */
::-webkit-scrollbar-button {
    display: none;
}

::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 0;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, 
        rgba(var(--primary-rgb), 0.8) 0%, 
        rgba(var(--primary-rgb), 0.6) 100%);
    border-radius: 6px;
    border: 2px solid var(--bg-primary);
    transition: background 0.2s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, 
        rgba(var(--primary-rgb), 1) 0%, 
        rgba(var(--primary-rgb), 0.8) 100%);
}

::-webkit-scrollbar-thumb:active {
    background: var(--primary);
}

::-webkit-scrollbar-corner {
    background: transparent;
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(var(--primary-rgb), 0.8) transparent;
}

/* ========================================
   SCROLLBAR THIN (per aree piccole)
   ======================================== */

.scrollbar-thin::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.scrollbar-thin::-webkit-scrollbar-button {
    display: none;
}

.scrollbar-thin::-webkit-scrollbar-track {
    background: transparent;
}

.scrollbar-thin::-webkit-scrollbar-thumb {
    border-radius: 3px;
    border: 1px solid var(--bg-primary);
}

.scrollbar-thin {
    scrollbar-width: thin;
    scrollbar-color: rgba(var(--primary-rgb), 0.8) transparent;
}

/* ========================================
   SCROLLBAR HIDDEN (per swiper, carousel)
   ======================================== */

.scrollbar-hidden::-webkit-scrollbar {
    display: none;
}

.scrollbar-hidden {
    scrollbar-width: none;
    -ms-overflow-style: none;
}

/* ========================================
   OTTIMIZZAZIONI PERFORMANCE
   ======================================== */

/* Prevenzione lag durante scroll */
body,
html {
    /* Smooth scrolling senza lag */
    scroll-behavior: smooth;
    
    /* Ottimizzazione rendering */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container scrollabili ottimizzati */
.scroll-container {
    /* Isola il rendering dello scroll */
    contain: paint;
    
    /* Ottimizza scroll su mobile */
    -webkit-overflow-scrolling: touch;
    
    /* Prevenzione lag */
    will-change: auto; /* Non usare 'scroll-position' causa lag */
}

/* ========================================
   SCROLLBAR TEMATIZZATE
   ======================================== */

/* Marathon Theme */
.theme-marathon ::-webkit-scrollbar-thumb,
.theme-race-marathon ::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, 
        rgba(35, 168, 235, 0.8) 0%, 
        rgba(35, 168, 235, 0.6) 100%);
}

.theme-marathon ::-webkit-scrollbar-thumb:hover,
.theme-race-marathon ::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, 
        rgba(35, 168, 235, 1) 0%, 
        rgba(35, 168, 235, 0.8) 100%);
}

/* Portici Theme */
.theme-portici ::-webkit-scrollbar-thumb,
.theme-race-portici ::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, 
        rgba(220, 51, 94, 0.8) 0%, 
        rgba(220, 51, 94, 0.6) 100%);
}

.theme-portici ::-webkit-scrollbar-thumb:hover,
.theme-race-portici ::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, 
        rgba(220, 51, 94, 1) 0%, 
        rgba(220, 51, 94, 0.8) 100%);
}

/* 5K Theme */
.theme-5k ::-webkit-scrollbar-thumb,
.theme-race-5k ::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, 
        rgba(231, 173, 69, 0.8) 0%, 
        rgba(231, 173, 69, 0.6) 100%);
}

.theme-5k ::-webkit-scrollbar-thumb:hover,
.theme-race-5k ::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, 
        rgba(231, 173, 69, 1) 0%, 
        rgba(231, 173, 69, 0.8) 100%);
}

/* Kids Run Theme */
.theme-kidsrun ::-webkit-scrollbar-thumb,
.theme-race-kidsrun ::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, 
        rgba(0, 155, 172, 0.8) 0%, 
        rgba(0, 155, 172, 0.6) 100%);
}

.theme-kidsrun ::-webkit-scrollbar-thumb:hover,
.theme-race-kidsrun ::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, 
        rgba(0, 155, 172, 1) 0%, 
        rgba(0, 155, 172, 0.8) 100%);
}

/* Run Tune Up Theme */
.theme-run-tune-up ::-webkit-scrollbar-thumb,
.theme-race-run-tune-up ::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, 
        rgba(203, 223, 68, 0.8) 0%, 
        rgba(203, 223, 68, 0.6) 100%);
}

.theme-run-tune-up ::-webkit-scrollbar-thumb:hover,
.theme-race-run-tune-up ::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, 
        rgba(203, 223, 68, 1) 0%, 
        rgba(203, 223, 68, 0.8) 100%);
}

/* ========================================
   AREE SPECIFICHE CON SCROLL
   ======================================== */

/* Menu mobile overlay */
.mobile-menu-overlay {
    /* Scrollbar thin per il menu */
    scrollbar-width: thin;
}

.mobile-menu-overlay::-webkit-scrollbar {
    width: 6px;
}

/* Tabelle risultati */
.results-table-wrapper {
    /* Ottimizzazione per tabelle grandi */
    contain: layout style paint;
}

.results-table-wrapper::-webkit-scrollbar {
    height: 8px;
}

.results-table-wrapper::-webkit-scrollbar-thumb {
    border-radius: 4px;
}

/* Search suggestions */
.search-suggestions {
    scrollbar-width: thin;
}

.search-suggestions::-webkit-scrollbar {
    width: 4px;
}

.search-suggestions::-webkit-scrollbar-thumb {
    border-radius: 2px;
    border: none;
}

/* Gallery lightbox */
.lightbox-content {
    scrollbar-width: thin;
}

/* ========================================
   PREVENZIONE LAG
   ======================================== */

/* Evita repaint durante scroll */
.fixed,
.sticky,
.main-menu {
    /* Isola il rendering */
    contain: layout style;
    
    /* Ottimizza compositing */
    transform: translateZ(0);
    backface-visibility: hidden;
}

/* Ottimizza elementi fuori viewport */
.module-wrapper {
    /* Lazy rendering per performance */
    content-visibility: auto;
    contain-intrinsic-size: auto 500px;
}

/* Disabilita will-change di default (causa lag) */
* {
    will-change: auto;
}

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

/* Mobile: scrollbar più sottile */
@media (max-width: 768px) {
    ::-webkit-scrollbar {
        width: 8px;
        height: 8px;
    }
    
    ::-webkit-scrollbar-thumb {
        border: 1px solid rgba(11, 11, 21, 0.5);
    }
}

/* Touch devices: nasconde scrollbar durante scroll */
@media (hover: none) and (pointer: coarse) {
    /* Scrollbar appare solo quando necessario */
    ::-webkit-scrollbar {
        width: 6px;
        height: 6px;
    }
    
    ::-webkit-scrollbar-thumb {
        opacity: 0;
        transition: opacity 0.3s ease;
    }
    
    *:hover::-webkit-scrollbar-thumb,
    *:active::-webkit-scrollbar-thumb {
        opacity: 1;
    }
}

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

/* Contrasto aumentato per accessibilità */
@media (prefers-contrast: high) {
    ::-webkit-scrollbar-thumb {
        background: var(--primary);
        border: 2px solid var(--bg-primary);
    }
}

/* Riduzione movimento per utenti sensibili */
@media (prefers-reduced-motion: reduce) {
    html,
    body {
        scroll-behavior: auto;
    }
    
    ::-webkit-scrollbar-thumb {
        transition: none;
    }
}