:root {
    --bg-color: #2c2c2c;
    --card-bg-color: #ffffff;
    --text-color: #000000;
    --border-radius: 20px;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
    position: relative;
}

.container {
    display: flex;
    
    position: relative;
    width: 100%;
    max-width: 400px;
    height: 800px;
    background-color: var(--card-bg-color);
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px var(--shadow-color);
    flex-direction: column;
    overflow: hidden;

    
}   
.sidebar {
    position: absolute;
    top: 0;
    right: 0;
    width: 60px;
    height: 100%;
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(8px) saturate(180%);
    -webkit-backdrop-filter: blur(8px) saturate(180%);
    border-radius: 16px 0 0 16px;
    box-shadow: 0 4px 24px 0 rgba(31, 38, 135, 0.10);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: all 0.5s;
}
.slider{
    text-align: center;
    width: 50px;
    height: 243px;
    border-radius: 25px;
    background-color: #a1a1a1;
}
.icon{
    overflow: hidden;
    width: 50px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1px;
    top: 1px;
}
.icon:hover {
    cursor: pointer;
    background-color: #457575;
 
    border-radius: 25px;
    transition: background-color 0.5s ease;
}

.icon img {
    transition: transform 0.2s cubic-bezier(.4,0,.2,1);
}

.icon:hover img {
    transform: scale(1.1);
}

.logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin-top: 20px;
}
h1 {
    font-size: 24px;
    color: var(--text-color);
    margin: 0px 0;
    text-align: center;
}

.content {
    width: 500px;
    height: 800px;
    background: #ffffff;
    overflow-y: auto;
    overflow-x: hidden;
    position: relative;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none;  /* IE e Edge */
}

.content::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
}

.content .post {
    width: 290px;
    background-color: var(--card-bg-color);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: 0 10px 30px var(--shadow-color);
    margin-top: 20px;
    margin-left: 25px;
    margin-right: 20px;
}
.content .post h2 {
    font-size: 20px;
    color: var(--text-color);
    margin: 10px 0;
}
.content .post p {
    font-size: 14px;
    color: var(--text-color);
    margin: 10px 0;
    
}
.content .post a {
    color: #457575;
    text-decoration: underline;
    font-size: 14px;
    
}
.content .post a:hover {
    text-decoration: underline;
}
.content .post .imgPost {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    margin-bottom: 10px;
}
.content .post img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius);
}
.content .post h2, .content .post p {
    color: var(--text-color);
    text-align: center;
}
.content .post p {
    font-size: 14px;
    line-height: 1.5;
}
#left{
    text-align: left;
    margin-left: 10px;
}
.dopamine-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.5s;
    margin-bottom: 25px;
    position: relative;
}

.dopamine-header img {
    transition: all 0.5s;
    margin: 0 auto;
    display: block;
    animation: rotateLogo 6s linear infinite;
}

.dopamine-header h1 {
    transition: all 0.5s;
    text-align: center;
    width: 100%;
}

.dopamine-header.scrolled {
    flex-direction: row;
    align-items: center;
    justify-content: center;
    position: absolute;
  
    left: 0;
    width: 100%;
    height: 50px;           /* Limita l'altezza a 50px */
    margin-bottom: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(8px) saturate(180%);
    -webkit-backdrop-filter: blur(8px) saturate(180%);
    border-radius: 16px;
    box-shadow: 0 4px 24px 0 rgba(31, 38, 135, 0.15);
    transition: all 0.5s;
    overflow: hidden;       /* Nasconde eventuali elementi che escono */
}

.dopamine-header.scrolled img {
    animation: none;
    position: absolute;
    left: 0;
    width: 60px !important;
    margin-right: 0;
    margin-left: 20px;
    top: 50%;
    transform: translateY(-50%);
}

.dopamine-header.scrolled h1 {
    font-size: 1.5rem;
    margin-top: 0;
    width: 100%;
    text-align: center;
}

.end-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255,255,255,0.25);
    backdrop-filter: blur(8px) saturate(180%);
    -webkit-backdrop-filter: blur(8px) saturate(180%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 99;
    transition: opacity 0.3s;
    opacity: 0;
    pointer-events: none;
}
.end-overlay.active {
    opacity: 1;
    pointer-events: all;
}
.end-message {
    background: rgba(255,255,255,0.5);
    border-radius: 24px;
    box-shadow: 0 4px 24px 0 rgba(31,38,135,0.15);
    padding: 40px 30px;
    text-align: center;
    position: relative;
    transform: translateY(40px);
    transition: transform 0.3s;
}
.end-overlay.active .end-message {
    transform: translateY(0);
}

.close-end {
    position: absolute;
    top: 10px;
    right: 18px;
    font-size: 2rem;
    cursor: pointer;
    color: #333;
    font-weight: bold;
    transition: color 0.2s;
}
.close-end:hover {
    color: #457575;
}

@keyframes rotateLogo {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* --- RESPONSIVE LAYOUT --- */
@media (max-width: 600px) {
    .container {
        max-width: 100vw;
        width: 100vw;
        height: 100vh;
        border-radius: 0;
        box-shadow: none;
    }
    .sidebar {
        width: 48px;
        border-radius: 12px 0 0 12px;
    }
    .slider {
        width: 40px;
        height: 180px;
        border-radius: 18px;
    }
    .icon, .icon img {
        width: 36px;
        height: 60px;
        min-width: 36px;
        min-height: 36px;
    }
    .content {
        width: 100vw;
        min-width: 0;
        height: 100vh;
        padding: 0;
    }
    .content .post {
        width: 90vw;
        margin-left: 5vw;
        margin-right: 5vw;
        padding: 12px;
    }
    .content .post h2 {
        font-size: 16px;
    }
    .content .post p,
    .content .post a {
        font-size: 13px;
    }
    .dopamine-header {
        margin-bottom: 10px;
    }
    .dopamine-header img {
        width: 60px !important;
    }
    .dopamine-header.scrolled img {
        width: 32px !important;
        margin-left: 8px;
    }
    .dopamine-header h1,
    .dopamine-header.scrolled h1 {
        font-size: 1.1rem;
    }
    .end-message {
        padding: 18px 8px;
        font-size: 1rem;
    }
}

@media (max-width: 400px) {
    .content .post {
        width: 96vw;
        margin-left: 2vw;
        margin-right: 2vw;
        padding: 8px;
    }
    .dopamine-header img {
        width: 40px !important;
    }
    .dopamine-header.scrolled img {
        width: 24px !important;
    }
    .dopamine-header h1,
    .dopamine-header.scrolled h1 {
        font-size: 0.95rem;
    }
    .end-message {
        padding: 10px 2px;
        font-size: 0.95rem;
    }
}

@media (max-width: 350px) {
    .container {
        max-width: 100vw;
        width: 100vw;
        height: 100vh;
        border-radius: 0;
        box-shadow: none;
    }
    .sidebar {
        width: 36px;
        border-radius: 8px 0 0 8px;
    }
    .slider {
        width: 28px;
        height: 120px;
        border-radius: 12px;
    }
    .icon, .icon img {
        width: 24px;
        height: 40px;
        min-width: 24px;
        min-height: 24px;
    }
    .content {
        width: 100vw;
        min-width: 0;
        height: 100vh;
        padding: 0;
    }
    .content .post {
        width: 98vw;
        margin-left: 1vw;
        margin-right: 1vw;
        padding: 4px;
    }
    .content .post h2 {
        font-size: 13px;
    }
    .content .post p,
    .content .post a {
        font-size: 11px;
    }
    .dopamine-header {
        margin-bottom: 6px;
    }
    .dopamine-header img {
        width: 28px !important;
    }
    .dopamine-header.scrolled img {
        width: 16px !important;
        margin-left: 4px;
    }
    .dopamine-header h1,
    .dopamine-header.scrolled h1 {
        font-size: 0.8rem;
    }
    .end-message {
        padding: 6px 1px;
        font-size: 0.8rem;
    }
}

/* Migliora accessibilità e touch */
html, body {
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    overscroll-behavior: smooth;
}