body {
    background-color: #fafaf9; /* stone-50 */
    color: #334155; /* slate-700 */
}

.section-card {
    background-color: white;
    border-radius: 0.75rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease-in-out;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.chart-container {
    position: relative;
    width: 100%;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    height: 300px;
    max-height: 400px;
}

@media (min-width: 768px) {
    .chart-container {
        height: 350px;
    }
}

/* Custom Scrollbar for inner content */
.custom-scroll::-webkit-scrollbar {
    width: 6px;
}
.custom-scroll::-webkit-scrollbar-track {
    background: #f1f1f1; 
}
.custom-scroll::-webkit-scrollbar-thumb {
    background: #d6d3d1; 
    border-radius: 3px;
}
.custom-scroll::-webkit-scrollbar-thumb:hover {
    background: #a8a29e; 
}

.nav-active {
    background-color: #fef3c7 !important;
    color: #d97706 !important;
    border-bottom: 3px solid #d97706;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.15);
}

.nav-btn {
    position: relative;
}

.nav-btn:hover {
    transform: translateY(-1px);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

.section-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.15), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    border-color: rgba(245, 158, 11, 0.3);
}

.dimension-card {
    position: relative;
    overflow: hidden;
}

.dimension-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent, currentColor, transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.dimension-card:hover::before {
    opacity: 1;
}

.dimension-icon-wrapper {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    transition: all 0.3s ease;
}

.dimension-card:hover .dimension-icon-wrapper {
    transform: scale(1.1) rotate(5deg);
}


.section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 0;
    margin-bottom: 1rem;
}

.section-title-icon {
    font-size: 1.75rem;
    line-height: 1;
}

.info-box {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 50%, #fcd34d 100%);
    border-left: 4px solid #f59e0b;
    border-radius: 0.75rem;
    padding: 1.25rem;
    margin: 1.5rem 0;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.15);
}

.highlight-box {
    background: white;
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.highlight-box:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    transform: translateY(-2px);
}

/* Hero Banner Background */
.hero-banner {
    background: linear-gradient(135deg, #fafaf9 0%, #f5f5f4 40%, #fef3c7 80%, #fef9e7 100%);
    position: relative;
}

.hero-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(245, 158, 11, 0.03) 0%, transparent 70%);
    pointer-events: none;
}

/* Hero Title */
.hero-title-main {
    color: #92400e; /* primary-800 - dịu êm hơn primary-700, vẫn nổi bật */
    text-shadow: 0 1px 3px rgba(245, 158, 11, 0.15),
                 0 1px 2px rgba(0, 0, 0, 0.05);
    font-weight: 700; /* font-bold - đồng nhất với các tiêu đề khác */
    letter-spacing: -0.02em;
    margin: 0;
    text-align: center;
    white-space: nowrap;
}

@media (max-width: 768px) {
    .hero-title-main {
        white-space: normal;
    }
}

/* Hero Tagline - subtitle ngay dưới title */
.hero-tagline {
    color: #57534e; /* stone-700 */
    font-style: italic;
    line-height: 1.6;
    text-align: center;
    font-weight: 400;
    margin: 0;
}

/* Hero Description - đoạn văn mô tả */
.hero-description {
    color: #57534e; /* stone-600 */
    line-height: 1.8;
    text-align: center;
    font-weight: 400;
    margin: 0;
}