:root {
            --primary-color: #a50004;
            --primary-dark: #d00005;
            --primary-light: #fbe596;
            --bg-gradient-1: #fbe596;
            --bg-gradient-2: #f3d56a;
            --text-dark: #2c3e50;
            --white: #ffffff;
            --border-color: #a50004;
            --shadow-color: rgba(165, 0, 4, 0.4);
            --shadow-color-light: rgba(165, 0, 4, 0.3);
            --shadow-color-strong: rgba(165, 0, 4, 0.5);
            --section-bg: #fbe596;
            --chart-bg: #fbe596;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', sans-serif;
            background: linear-gradient(135deg, var(--bg-gradient-1) 0%, var(--bg-gradient-2) 100%) !important;
            padding: 0;
            color: var(--text-dark);
            font-size: 12px;
            min-height: 100vh;
            margin: 0;
        }

        /* HEADER */
        .main-header {
            background: white;
            border-bottom: 3px solid var(--primary-color);
            padding: 20px;
            margin-bottom: 20px;
            box-shadow: 0 4px 15px var(--shadow-color-light);
        }

        .header-content {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
        }

        .header-left h1 {
            font-size: 28px;
            font-weight: 700;
            margin: 0 0 5px 0;
            color: var(--primary-color);
        }

        .header-left p {
            font-size: 16px;
            margin: 0;
            color: var(--text-dark);
            opacity: 0.8;
        }

        .header-right {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .color-picker {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--section-bg);
            padding: 8px 12px;
            border-radius: 25px;
            border: 2px solid var(--primary-color);
            flex-wrap: wrap;
        }

        .color-picker label {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary-color);
            margin-right: 4px;
        }

        .color-option {
            width: 25px;
            height: 25px;
            border-radius: 50%;
            cursor: pointer;
            border: 2px solid white;
            box-shadow: 0 2px 5px var(--shadow-color-light);
            transition: transform 0.2s ease;
        }

        .color-option:hover {
            transform: scale(1.1);
        }

        .color-option.active {
            border: 3px solid #333;
            transform: scale(1.15);
        }

        .color-default { background: linear-gradient(45deg, #a50004, #fbe596); }
        .color-feminine { background: linear-gradient(45deg, #ff6b9d, #ffeaa7); }
        .color-classic { background: linear-gradient(45deg, #2d3436, #ddd6fe); }
        .color-masculine { background: linear-gradient(45deg, #2980b9, #95a5a6); }
        .color-dark { background: linear-gradient(45deg, #2c3e50, #34495e); }
        .color-simple { background: linear-gradient(45deg, #27ae60, #2ecc71); }
        .color-golden { background: linear-gradient(45deg, #272525, #f4c578); }
        .color-midnight { background: linear-gradient(45deg, #0b0b17, #ffffff); }

        .home-btn {
            background: linear-gradient(to right, var(--primary-color), var(--primary-dark));
            color: white;
            padding: 12px 20px;
            border: none;
            border-radius: 25px;
            text-decoration: none;
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 4px 10px var(--shadow-color-light);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .home-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 15px var(--shadow-color);
            text-decoration: none;
            color: white;
        }

        /* MAIN CONTENT */
        .main-content {
            padding: 10px;
        }

        .input-section {
            background: white;
            padding: 20px;
            border-radius: 16px;
            margin-bottom: 15px;
            box-shadow: 0 10px 25px var(--shadow-color);
            display: flex;
            gap: 15px;
            align-items: center;
            border: 2px solid var(--border-color);
            max-width: 1400px;
            margin: 0 auto 55px auto;
        }

        .form-group {
            flex: 1;
            min-width: 0;
        }

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 14px;
            color: var(--primary-color);
        }

        .form-group input {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 14px;
            background-color: #fbfdf3;
            outline: none;
        }

        .form-group input::placeholder {
            color: #999;
            font-style: italic;
        }

        .form-group input:focus {
            border-color: var(--primary-dark);
            box-shadow: 0 0 5px var(--shadow-color-light);
        }

        .btn {
            background: linear-gradient(to right, var(--primary-color), var(--primary-dark));
            color: white;
            padding: 12px 16px;
            border: none;
            border-radius: 30px;
            cursor: pointer;
            font-size: 13px;
            font-weight: 600;
            box-shadow: 0 4px 10px var(--shadow-color-strong);
            transition: all 0.3s ease;
            white-space: nowrap;
            margin-right: 8px;
        }

        .btn:hover {
            background: linear-gradient(to right, var(--primary-color), var(--primary-dark));
            transform: translateY(-2px);
            box-shadow: 0 6px 14px var(--shadow-color-strong);
        }

        .btn-decode {
            background: linear-gradient(to right, #ff6b6b, #ee5a52);
        }

        .btn-decode:hover {
            background: linear-gradient(to right, #ff5252, #d32f2f);
        }

        /* MAIN LAYOUT */
        .mega-container {
            background: white;
            border-radius: 16px;
            padding: 20px;
            box-shadow: 0 10px 25px var(--shadow-color);
            display: grid;
            grid-template-columns: 2fr 3fr;
            gap: 20px;
            max-width: 1400px;
            margin: 0 auto;
            border: 2px solid var(--border-color);
        }

        /* CỘT PHẢI - CONTAINER */
        .right-container {
            display: grid;
            grid-template-rows: auto 1fr;
            gap: 20px;
        }

        /* PHẦN TRÊN CỘT PHẢI - KIM TỰ THÁP + CHU KỲ */
        .top-right-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        .header-compact {
            grid-column: 1/-1;
            text-align: center;
            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
            color: white;
            padding: 15px;
            border-radius: 12px;
            margin-bottom: 15px;
            position: relative;
        }

        .header-compact h1 {
            font-size: 24px;
            margin-bottom: 5px;
            margin-top: 0;
        }

        .person-info {
            font-size: 16px;
            opacity: 0.95;
        }

        .copyright-info {
            font-size: 10px;
            opacity: 0.6;
            position: absolute;
            top: 15px;
            right: 15px;
            color: rgba(255, 255, 255, 0.8);
        }

        /* COLUMN 1: CHỈ SỐ CHÍNH + CÁC CHỈ SỐ KHÁC */
        .main-section {
            display: grid;
            grid-template-rows: auto 1fr;
            gap: 15px;
        }

        .core-indices {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
        }

        .core-index {
            background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
            color: white;
            padding: 15px;
            border-radius: 12px;
            text-align: center;
            box-shadow: 0 4px 10px var(--shadow-color-light);
        }

        .core-index .label {
            font-size: 11px;
            margin-bottom: 8px;
            opacity: 0.9;
            font-weight: 600;
        }

        .core-index .value {
            font-size: 24px;
            font-weight: 700;
        }

        .other-indices {
            background: var(--section-bg);
            border-radius: 12px;
            padding: 15px;
            border: 2px solid var(--border-color);
        }

        .indices-title {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--primary-color);
            text-align: center;
        }

        .indices-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 8px;
        }

        .index-mini {
            display: flex;
            justify-content: space-between;
            padding: 8px 12px;
            background: white;
            border-radius: 8px;
            font-size: 12px;
            border: 1px solid var(--border-color);
        }

        .index-mini .name {
            font-weight: 600;
            color: var(--primary-color);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            margin-right: 8px;
        }

        .index-mini .value {
            font-weight: 700;
            color: var(--primary-dark);
            flex-shrink: 0;
        }

        /* COLUMN 2: KIM TỰ THÁP */
        .pyramid-section {
            display: block;
        }

        .pyramid-compact {
            background: var(--section-bg);
            border: 2px solid var(--border-color);
            border-radius: 12px;
            padding: 15px;
            text-align: center;
            height: 100%;
        }

        /* COLUMN 3: CHU KỲ */
        .cycles-section {
            display: block;
        }

        .cycles-compact {
            background: var(--section-bg);
            border: 2px solid var(--border-color);
            border-radius: 12px;
            padding: 15px;
            height: 100%;
        }

        .pyramid-title {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--primary-color);
        }

        .pyramid-svg {
            width: 100%;
            height: 280px;
        }

        .pyramid-node {
            fill: #fbfdf3;
            stroke: var(--primary-color);
            stroke-width: 2;
        }

        .pyramid-text {
            fill: var(--primary-color);
            font-family: 'Inter', sans-serif;
            font-weight: 700;
            text-anchor: middle;
            dominant-baseline: middle;
            font-size: 12px;
        }

        .pyramid-line {
            stroke: var(--primary-color);
            stroke-width: 1;
            opacity: 0.6;
        }

        .cycles-title {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--primary-color);
            text-align: center;
        }

        .current-cycles {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
            margin-bottom: 15px;
        }

        .cycle-current {
            background: linear-gradient(to right, var(--primary-color), var(--primary-dark));
            color: white;
            padding: 12px;
            border-radius: 8px;
            text-align: center;
        }

        .cycle-current .label {
            font-size: 10px;
            margin-bottom: 4px;
        }

        .cycle-current .value {
            font-size: 20px;
            font-weight: 700;
        }

        .nine-cycle {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 3px;
            margin-bottom: 10px;
        }

        .cycle-year {
            flex: 0 0 calc(11.11% - 3px);
            aspect-ratio: 1;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
            font-weight: 700;
            color: white;
            position: relative;
            cursor: pointer;
            min-width: 24px;
        }

        .cycle-year.current {
            box-shadow: 0 0 10px #ffd700;
            border: 3px solid #ffd700;
        }

        .cycle-year-1 { background: #e74c3c; }
        .cycle-year-2 { background: #f39c12; }
        .cycle-year-3 { background: #f1c40f; }
        .cycle-year-4 { background: #27ae60; }
        .cycle-year-5 { background: #3498db; }
        .cycle-year-6 { background: #9b59b6; }
        .cycle-year-7 { background: #34495e; }
        .cycle-year-8 { background: #e67e22; }
        .cycle-year-9 { background: #16a085; }

        .cycle-years-info {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 3px;
            font-size: 8px;
            text-align: center;
            color: #666;
        }

        .cycle-years-info > div {
            flex: 0 0 calc(11.11% - 3px);
            min-width: 24px;
        }

        /* BIỂU ĐỒ - CỘT 4 */
        .charts-section {
            display: block;
        }

        .chart-compact {
            background: var(--chart-bg);
            border: 2px solid var(--border-color);
            border-radius: 12px;
            padding: 12px;
            height: 100%;
            min-height: 200px;
        }

        .chart-title {
            font-size: 12px;
            font-weight: 600;
            text-align: center;
            margin-bottom: 10px;
            color: var(--primary-color);
        }

        .diamond-mini {
            display: grid;
            gap: 4px;
            justify-content: center;
            align-content: center;
            min-height: 80px;
        }

        .diamond-row {
            display: flex;
            justify-content: center;
            gap: 4px;
        }

        .diamond-cell {
            width: 28px;
            height: 28px;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 10px;
            background: white;
            border-radius: 4px;
        }

        .capture-zone {
            border: 3px dashed var(--primary-color);
            border-radius: 12px;
            position: relative;
        }

        .capture-zone::before {
            content: "📸 Vùng Capture";
            position: absolute;
            top: -35px;
            left: 15px;
            background: var(--primary-color);
            color: white;
            padding: 5px 12px;
            border-radius: 8px;
            font-size: 12px;
            font-weight: 600;
            box-shadow: 0 2px 8px var(--shadow-color-light);
        }

        /* FOOTER */
        .footer {
            background: white;
            border-top: 3px solid var(--primary-color);
            padding: 20px;
            margin-top: 30px;
            text-align: center;
        }

        .footer p {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            flex-wrap: wrap;
            color: var(--text-dark);
        }

        .footer a {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
        }

        .footer a:hover {
            text-decoration: underline;
        }

        .footer-logo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            padding: 4px;
            background-color: white;
            border-radius: 50%;
            box-shadow: 0 2px 6px var(--shadow-color-light);
        }

        @media print {
            .main-header, .input-section, .footer { display: none; }
            body { background: white !important; }
            .capture-zone { border: none; }
            .capture-zone::before { display: none; }
            .main-content { padding: 0; }
        }

        /* RESPONSIVE DESIGN */
 /* ===== TABLET (769px - 1200px) ===== */
@media (min-width: 769px) and (max-width: 1200px) {
    .main-section, .right-container {
        grid-column: 1 / -1;
    }
    
    /* Kim tự tháp + chu kỳ VẪN 2 cột */
    .top-right-section {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
    
    /* 3 biểu đồ VẪN nằm ngang */
    .chart-compact div[style*="grid-template-columns"] {
        grid-template-columns: 1fr 1fr 1fr !important;
        gap: 15px !important;
    }
    
    .diamond-cell {
        width: 28px;
        height: 28px;
        font-size: 10px;
    }
    
    .mega-container {
        max-width: 1000px;
    }
}

/* ===== MOBILE (≤768px) ===== */
@media (max-width: 768px) {
    body {
        font-size: 11px;
    }

    .main-header {
        padding: 15px;
    }

    .header-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }

    .header-left h1 {
        font-size: 24px;
    }

    .header-left p {
        font-size: 14px;
    }

    .header-right {
        flex-direction: column;
        gap: 10px;
    }

    .color-picker {
        justify-content: center;
        gap: 4px;
        padding: 6px 8px;
    }

    .color-picker label {
        font-size: 11px;
        margin-right: 3px;
    }

    .main-content {
        padding: 5px;
    }

    .input-section {
        flex-direction: column;
        gap: 10px;
        padding: 15px;
        margin-bottom: 20px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 12px;
        width: 100%;
        margin-bottom: 8px;
    }

    .home-btn {
        padding: 10px 15px;
        font-size: 12px;
    }

    .header-compact h1 {
        font-size: 20px;
    }

    .person-info {
        font-size: 14px;
    }

    .copyright-info {
        font-size: 9px;
        bottom: 3px;
        right: 12px;        top: unset!important;
    }

    /* LAYOUT CHÍNH */
    .mega-container {
        grid-template-columns: 1fr;
        padding: 15px;
        gap: 15px;
    }

    /* Kim tự tháp + chu kỳ THÀNH 1 cột */
    .top-right-section {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    /* 3 biểu đồ THÀNH 1 cột */
    .chart-compact div[style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
        gap: 20px !important;
    }

    .core-indices {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }

    .core-index {
        padding: 12px;
    }

    .core-index .value {
        font-size: 20px;
    }

    .indices-list {
        grid-template-columns: 1fr;
        gap: 6px;
    }

    .index-mini {
        padding: 6px 10px;
        font-size: 11px;
    }

    .pyramid-svg {
        height: 200px;
    }

    .chart-compact {
        min-height: auto;
    }
    
    .diamond-mini {
        min-height: 80px;
    }

    .diamond-cell {
        width: 26px;
        height: 26px;
        font-size: 9px;
    }

    .current-cycles {
        gap: 8px;
    }

    .cycle-current {
        padding: 10px;
    }

    .cycle-current .value {
        font-size: 18px;
    }

    .nine-cycle {
        gap: 2px;
    }
    
    .cycle-year {
        flex: 0 0 calc(11.11% - 2px);
        font-size: 9px;
        min-width: 20px;
    }
    
    .cycle-years-info {
        gap: 2px;
        font-size: 7px;
    }
    
    .cycle-years-info > div {
        flex: 0 0 calc(11.11% - 2px);
        min-width: 20px;
    }

    .capture-zone::before {
        top: -30px;
        font-size: 11px;
        padding: 4px 10px;
        box-shadow: 0 2px 5px var(--shadow-color-light);
    }

    .footer p {
        flex-direction: column;
        gap: 5px;
        font-size: 14px;
    }
}

/* ===== MOBILE NHỎ (≤480px) ===== */
@media (max-width: 480px) {
    .core-indices {
        grid-template-columns: repeat(2, 1fr);
    }

    .diamond-cell {
        width: 22px;
        height: 22px;
        font-size: 8px;
    }

    .pyramid-svg {
        height: 180px;
    }

    .nine-cycle {
        gap: 1px;
    }
    
    .cycle-year {
        flex: 0 0 calc(11.11% - 1px);
        font-size: 8px;
        min-width: 18px;
    }
    
    .cycle-years-info {
        gap: 1px;
        font-size: 6px;
    }
    
    .cycle-years-info > div {
        flex: 0 0 calc(11.11% - 1px);
        min-width: 18px;
    }

    .color-option {
        width: 16px;
        height: 16px;
    }

    .color-picker {
        gap: 3px;
        flex-wrap: wrap;
        justify-content: center;
        padding: 6px;
    }

    .color-picker label {
        width: 100%;
        text-align: center;
        margin: 0 0 4px 0;
        font-size: 10px;
    }
}
/* OVERLAY TÂM LINH HIỆN ĐẠI - TRẮNG VÀNG */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
background: linear-gradient(135deg, #0a0a0a 0%, #111111 40%, #1a1a1a 70%, #2e2e2e 85%, #444444 95%, #555555 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    transition: opacity 0.8s ease;
    pointer-events: none;
    overflow: hidden;
}

.overlay.show {
    opacity: 1;
    pointer-events: auto;
}

/* COSMIC BACKGROUND */
.cosmic-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* SACRED GEOMETRY */
.sacred-geometry {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    opacity: 0.3;
    animation: rotate-sacred 20s linear infinite;
}

.sacred-geometry svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 20px rgba(245, 158, 11, 0.8));
}

@keyframes rotate-sacred {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* FLOATING PARTICLES */
.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: radial-gradient(circle, #ffffff 0%, #f59e0b 50%, transparent 100%);
    border-radius: 50%;
    animation: float-particle 8s linear infinite;
    opacity: 0;
}

@keyframes float-particle {
    0% {
        opacity: 0;
        transform: translateY(100vh) scale(0);
    }
    10% {
        opacity: 1;
        transform: translateY(90vh) scale(1);
    }
    90% {
        opacity: 1;
        transform: translateY(10vh) scale(1);
    }
    100% {
        opacity: 0;
        transform: translateY(0vh) scale(0);
    }
}

/* CENTRAL MANDALA */
.mandala-center {
    position: relative;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.3) 0%, rgba(217, 119, 6, 0.2) 50%, transparent 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: pulse-mandala 3s ease-in-out infinite;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.8);
    box-shadow: 
        0 0 30px rgba(245, 158, 11, 0.5),
        inset 0 0 30px rgba(255, 255, 255, 0.3);
}

@keyframes pulse-mandala {
    0%, 100% {
        transform: scale(1);
        box-shadow: 
            0 0 30px rgba(245, 158, 11, 0.5),
            inset 0 0 30px rgba(255, 255, 255, 0.3);
    }
    50% {
        transform: scale(1.1);
        box-shadow: 
            0 0 50px rgba(245, 158, 11, 0.8),
            inset 0 0 50px rgba(255, 255, 255, 0.5);
    }
}

/* INNER SYMBOL */
.inner-symbol {
    width: 80px;
    height: 80px;
    background: linear-gradient(45deg, #fbbf24, #f59e0b, #d97706, #b45309);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: rotate-symbol 4s linear infinite;
    position: relative;
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.6);
}

.inner-symbol::before {
    content: "☀";
    font-size: 32px;
    color: white;
    text-shadow: 0 0 15px rgba(255, 255, 255, 1);
    animation: glow-symbol 2s ease-in-out infinite alternate;
}

@keyframes rotate-symbol {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes glow-symbol {
    from { 
        text-shadow: 0 0 15px rgba(255, 255, 255, 1);
        transform: scale(1);
    }
    to { 
        text-shadow: 0 0 25px rgba(255, 255, 255, 1), 0 0 35px rgba(245, 158, 11, 0.8);
        transform: scale(1.2);
    }
}

/* LOADING TEXT */
.loading-text {
    position: absolute;
    top: calc(50% + 120px);
    left: 50%;
    transform: translateX(-50%);
    font-size: 18px;
    color: #92400e;
    font-weight: 600;
    text-align: center;
    animation: fade-text 2s ease-in-out infinite;
    text-shadow: 0 0 15px rgba(245, 158, 11, 0.8);
    letter-spacing: 2px;
}

@keyframes fade-text {
    0%, 100% {
        opacity: 0.6;
        transform: translateX(-50%) translateY(0px);
    }
    50% {
        opacity: 1;
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ENERGY RINGS */
.energy-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 2px solid rgba(245, 158, 11, 0.4);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: expand-ring 3s ease-out infinite;
}

.energy-ring:nth-child(1) {
    width: 250px;
    height: 250px;
    animation-delay: 0s;
}

.energy-ring:nth-child(2) {
    width: 350px;
    height: 350px;
    animation-delay: 1s;
}

.energy-ring:nth-child(3) {
    width: 450px;
    height: 450px;
    animation-delay: 2s;
}

@keyframes expand-ring {
    0% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(0.8);
    }
    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(1.2);
    }
}

/* FLOATING NUMBERS TÂM LINH */
.floating-number {
    position: absolute;
    font-size: 24px;
    color: rgba(146, 64, 14, 0.9);
    font-weight: bold;
    text-shadow: 0 0 15px rgba(245, 158, 11, 0.8), 0 0 25px rgba(217, 119, 6, 0.6);
    animation: float-number-spiritual 6s linear infinite;
    user-select: none;
    font-family: 'Inter', sans-serif;
}

@keyframes float-number-spiritual {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 0;
    }
    20% {
        opacity: 1;
    }
    80% {
        opacity: 1;
    }
    100% {
        transform: translateY(-120px) rotate(360deg);
        opacity: 0;
    }
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .sacred-geometry {
        width: 200px;
        height: 200px;
    }
    
    .mandala-center {
        width: 150px;
        height: 150px;
    }
    
    .inner-symbol {
        width: 60px;
        height: 60px;
    }
    
    .inner-symbol::before {
        font-size: 18px;
    }
    
    .loading-text {
        font-size: 16px;
        top: calc(50% + 100px);
    }
    
    .floating-number {
        font-size: 20px;
    }
}
        /* PHẦN BÀI VIẾT HƯỚNG DẪN */
        .articles-section {
            max-width: 1400px;
            margin: 30px auto 0;
            padding: 0 10px;
        }

        .articles-header {
            text-align: center;
            margin-bottom: 30px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 8px 32px rgba(102, 126, 234, 0.3);
        }

        .articles-header h2 {
            font-size: 24px;
            margin-bottom: 8px;
            font-weight: 700;
        }

        .articles-header p {
            font-size: 14px;
            opacity: 0.9;
            margin: 0;
        }

        .articles-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }

        .article-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            position: relative;
            border: 1px solid rgba(231, 234, 243, 0.8);
        }

        .article-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
        }

        .article-image {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 28px;
            position: relative;
        }

        .article-card[data-category="core"] .article-image {
            background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
        }

        .article-card[data-category="cycle"] .article-image {
            background: linear-gradient(135deg, #4ecdc4 0%, #44a08d 100%);
        }

        .article-card[data-category="advanced"] .article-image {
            background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
            color: #2c3e50;
        }

        .article-card[data-category="chart"] .article-image {
            background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
            color: #2c3e50;
        }

        .article-card[data-category="lesson"] .article-image {
            background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
            color: #2c3e50;
        }

        .article-card[data-category="talent"] .article-image {
            background: linear-gradient(135deg, #fad0c4 0%, #ffd1ff 100%);
            color: #2c3e50;
        }

        .article-card[data-category="karma"] .article-image {
            background: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%);
            color: white;
        }

        .article-card[data-category="challenge"] .article-image {
            background: linear-gradient(135deg, #fbc2eb 0%, #a6c1ee 100%);
            color: #2c3e50;
        }

        .article-card[data-category="mature"] .article-image {
            background: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
            color: white;
        }

        .article-content {
            padding: 20px;
        }

        .article-content h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
            color: #2c3e50;
            line-height: 1.4;
        }

        .article-content p {
            font-size: 13px;
            color: #636e72;
            line-height: 1.5;
            margin-bottom: 15px;
        }

        .article-meta {
            display: flex;
            gap: 8px;
            margin-bottom: 15px;
        }

        .article-meta span {
            font-size: 10px;
            padding: 4px 8px;
            border-radius: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .category {
            background: #e3f2fd;
            color: #1976d2;
        }

        .difficulty {
            background: #f3e5f5;
            color: #7b1fa2;
        }

        .article-link {
            padding: 0 20px 20px;
        }

        .article-link a {
            display: inline-block;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            text-decoration: none;
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 12px;
            font-weight: 600;
            transition: all 0.3s ease;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .article-link a:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .articles-grid {
                grid-template-columns: 1fr;
                gap: 15px;
            }
            
            .articles-header h2 {
                font-size: 20px;
            }
            
            .article-image {
                height: 70px;
                font-size: 24px;
            }
        }

        @media (max-width: 480px) {
            .articles-section {
                padding: 0 5px;
            }
            
            .articles-header {
                padding: 20px 15px;
            }
            
            .article-content {
                padding: 15px;
            }
        }