/* ==========================================================================
   VIETLOTT EDITORIAL ARTICLE - STYLESHEET
   ========================================================================== */

html { 
    margin: 0; 
    padding: 0; 
    width: 100%; 
    font-size: 16px; 
}

body {
    margin: 0; 
    padding: 0; 
    width: 100%;
    background-color: #F4F3F0;
    color: #111111;
    overflow-x: hidden;
    overscroll-behavior: none;
    -webkit-font-smoothing: antialiased;
}

/* Editorial Noise Texture */
.paper-texture {
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100vw; 
    height: 100vh;
    pointer-events: none; 
    z-index: 50;
    opacity: 0.025; 
    mix-blend-mode: multiply;
}

#canvas-container {
    position: fixed; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100vh;
    z-index: 5; 
    pointer-events: none;
    display: flex; 
    justify-content: center; 
    align-items: center;
}

/* Quả bóng 80% (400px) */
#svg-ball-container {
    width: 400px; 
    height: 400px; 
    max-width: 90vw; 
    max-height: 90vh;
    will-change: transform;
    transform: translateZ(0); 
}

.idle-float {
    animation: editorialFloat 6s ease-in-out infinite;
}

@keyframes editorialFloat {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

.pedestal-base {
    position: absolute; 
    width: 256px; 
    height: 16px;
    background: linear-gradient(135deg, #ffffff 0%, #EFEFEF 100%);
    border-radius: 50%;
    top: 73%; 
    left: 50%; 
    transform: translate(-50%, -50%);
    z-index: 6; 
    will-change: transform;
}

.pedestal-shadow {
    position: absolute; 
    width: 224px; 
    height: 32px;
    background: rgba(0,0,0,0.12); 
    border-radius: 50%;
    top: 74%; 
    left: 50%; 
    transform: translate(-50%, -50%);
    filter: blur(20px); 
    z-index: 4; 
    will-change: transform;
}

.content-layer { 
    position: relative; 
    z-index: 20; 
    pointer-events: none; 
}

.scroll-section {
    height: 100vh; 
    display: flex; 
    flex-direction: column;
    justify-content: center; 
    align-items: center;
    position: relative; 
    pointer-events: auto; 
}

/* KHẮC PHỤC LỖI HIỂN THỊ TEXT: Dùng class quản lý chung, được điều khiển độc lập bởi JS */
.reveal-elem {
    opacity: 0; 
    transform: translateY(40px);
    will-change: transform, opacity;
}

.museum-label {
    background-color: rgba(244, 243, 240, 0.85);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(17,17,17,0.08);
    border-radius: 4px;
}

#pedestal-fader {
    position: absolute; 
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%;
    background: linear-gradient(to bottom, transparent 50%, #F4F3F0 90%);
    z-index: 7; 
    opacity: 0; 
    pointer-events: none;
}

/* Typography Bài viết - Độ rộng chuẩn báo chí */
.article-content { 
    pointer-events: auto; 
    padding-top: 4rem; 
}

.article-content p {
    margin-bottom: 2rem;
    font-family: 'Merriweather', serif;
    font-size: 1.1875rem; 
    line-height: 1.85;
    color: #252525;
    max-width: 680px; 
    margin-left: auto; 
    margin-right: auto;
}

/* Sapo Sang trọng */
.sapo-box {
    position: relative; 
    max-width: 720px; 
    margin: 0 auto 5rem auto; 
    text-align: center;
}

.sapo-box p {
    font-family: 'Merriweather', serif;
    font-style: italic; 
    font-size: 1.5rem; 
    font-weight: 300;
    color: #111111; 
    margin: 0; 
    line-height: 1.7; 
    max-width: 100%;
}

.sapo-divider {
    width: 40px; 
    height: 2px; 
    background-color: #820505; 
    margin: 2rem auto;
}

.article-content h3 {
    font-family: 'Anton', sans-serif;
    font-size: 2.25rem; 
    text-transform: uppercase; 
    letter-spacing: 0.02em;
    margin-top: 5rem; 
    margin-bottom: 2rem; 
    color: #111111;
    max-width: 680px; 
    margin-left: auto; 
    margin-right: auto;
    position: relative;
}

.article-content h3::before {
    content: ''; 
    position: absolute; 
    left: 0; 
    top: -1rem;
    width: 24px; 
    height: 4px; 
    background-color: #820505;
}

/* Timeline Tối giản */
.timeline-wrapper {
    margin: 4rem auto; 
    max-width: 680px; 
    position: relative; 
    padding-left: 1rem;
}

.timeline-nav {
    display: flex; 
    flex-direction: column; 
    gap: 1.5rem; 
    border-left: 1px solid rgba(17,17,17,0.1);
}

.timeline-item {
    position: relative; 
    cursor: pointer; 
    padding-left: 2.5rem;
}

.timeline-item::before {
    content: ''; 
    position: absolute; 
    left: -5px; 
    top: 12px;
    width: 9px; 
    height: 9px; 
    border-radius: 50%; 
    background-color: #d9d6d2; 
    transition: all 0.4s ease;
}

.timeline-item:hover .timeline-year, 
.timeline-item.active .timeline-year { 
    color: #820505; 
}

.timeline-item:hover::before, 
.timeline-item.active::before { 
    background-color: #820505; 
    transform: scale(1.4); 
}

.timeline-year { 
    font-family: 'Anton', sans-serif; 
    font-size: 1.5rem; 
    color: #9d9a96; 
    transition: color 0.4s; 
    margin-bottom: 0.25rem;
}

.timeline-content-body {
    font-family: 'Inter', sans-serif; 
    font-size: 1.05rem; 
    color: #55524f; 
    line-height: 1.6;
    max-height: 0; 
    overflow: hidden; 
    opacity: 0; 
    transition: all 0.5s ease;
}

.timeline-item.active .timeline-content-body { 
    max-height: 300px; 
    opacity: 1; 
    padding-top: 0.25rem; 
    padding-bottom: 1rem; 
}

/* Album Grid Tràn viền */
.album-grid img { 
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1); 
}

.album-grid .overflow-hidden:hover img { 
    transform: scale(1.05); 
}

.chart-container { 
    position: relative; 
    width: 100%; 
    margin-bottom: 1rem; 
}