:root {
    --primary: #1769ff;
    --primary-dark: #0d47c9;
    --primary-light: #eaf2ff;
    --primary-lighter: #f5f8ff;
    --white: #ffffff;
    --background: #f4f7fc;
    --text: #182338;
    --text-light: #64748b;
    --border: #dce5f2;
    --shadow-sm: 0 4px 12px rgba(23, 105, 255, 0.08);
    --shadow-md: 0 12px 30px rgba(23, 105, 255, 0.12);
    --shadow-lg: 0 20px 50px rgba(15, 45, 90, 0.15);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --transition: 0.25s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    background:
        radial-gradient(
            circle at 10% 10%,
            rgba(23, 105, 255, 0.08),
            transparent 30%
        ),
        radial-gradient(
            circle at 90% 90%,
            rgba(23, 105, 255, 0.06),
            transparent 30%
        ),
        var(--background);
    color: var(--text);
    font-family:
        Inter,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        sans-serif;
    line-height: 1.7;
    padding: 90px 24px 60px;
    overflow-x: hidden;
    animation: pageFade 0.6s ease both;
}

.back-btn {
    position: fixed;
    top: 25px;
    left: 25px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 50%;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    z-index: 100;
    transition:
        transform var(--transition),
        background var(--transition),
        color var(--transition),
        box-shadow var(--transition);
}

.back-btn:hover {
    color: var(--white);
    background: var(--primary);
    transform: translateX(-3px);
    box-shadow: 0 8px 25px rgba(23, 105, 255, 0.25);
}

.back-btn:active {
    transform: translateX(-3px) scale(0.94);
}

.back-btn i {
    font-size: 17px;
}

.document-switcher {
    width: min(1100px, 100%);
    margin: 0 auto 25px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    animation: slideDown 0.65s ease 0.1s both;
}

.document-switcher form {
    margin: 0;
}

.switch-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    min-height: 44px;
    padding: 10px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--white);
    color: #4b5d78;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition:
        transform var(--transition),
        color var(--transition),
        background var(--transition),
        border-color var(--transition),
        box-shadow var(--transition);
}

.switch-btn::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -1px;
    width: 0;
    height: 2px;
    background: var(--primary);
    transform: translateX(-50%);
    transition: width var(--transition);
}

.switch-btn:hover {
    color: var(--primary);
    border-color: #b8cdf5;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(23, 105, 255, 0.12);
}

.switch-btn:hover::after {
    width: 55%;
}

.switch-btn:active {
    transform: translateY(0) scale(0.98);
}

.switch-btn i {
    color: var(--primary);
    font-size: 15px;
    transition: transform var(--transition);
}

.switch-btn:hover i {
    transform: scale(1.12);
}

.document {
    position: relative;
    width: min(1100px, 100%);
    margin: 0 auto;
    background: var(--white);
    border: 1px solid rgba(220, 229, 242, 0.9);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    animation: documentAppear 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) 0.15s both;
}

.document::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(
        90deg,
        var(--primary-dark),
        var(--primary),
        #4c91ff
    );
}

.header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 30px;
    padding: 42px 50px 35px;
    background: linear-gradient(
        180deg,
        #ffffff 0%,
        #fbfdff 100%
    );
    border-bottom: 1px solid var(--border);
}

.title {
    position: relative;
    color: var(--text);
    font-size: clamp(26px, 4vw, 38px);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.7px;
    max-width: 700px;
}

.title::after {
    content: "";
    display: block;
    width: 55px;
    height: 4px;
    margin-top: 16px;
    border-radius: 10px;
    background: linear-gradient(
        90deg,
        var(--primary),
        #6ba2ff
    );
    animation: titleLine 0.8s ease 0.7s both;
}

.meta {
    min-width: 190px;
    padding: 12px 15px;
    color: var(--text-light);
    background: var(--primary-lighter);
    border: 1px solid #dbe8ff;
    border-radius: var(--radius-md);
    font-size: 13px;
    line-height: 1.8;
    text-align: right;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.7);
    animation: metaAppear 0.7s ease 0.45s both;
}

.meta::first-line {
    color: var(--primary);
    font-weight: 700;
}

.content {
    padding: 45px 50px 55px;
    color: #35445c;
    font-size: 16px;
    line-height: 1.85;
    overflow-wrap: break-word;
}

.content p {
    text-align: justify;
}

.content p:last-child {
    margin-bottom: 0;
}

.content strong,
.content b {
    color: var(--text);
    font-weight: 700;
}

.content em {
    color: #50627c;
}

.content a {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition:
        color var(--transition),
        border-color var(--transition);
}

.content a:hover {
    color: var(--primary-dark);
    border-color: var(--primary);
}

.content h1,
.content h2,
.content h3,
.content h4,
.content h5,
.content h6 {
    color: var(--text);
    line-height: 1.3;
    font-weight: 750;
    margin-top: 35px;
    margin-bottom: 16px;
    letter-spacing: -0.3px;
}

.content h1 {
    font-size: 30px;
}

.content h2 {
    border-radius: 0px 5px 5px 0px;
    font-size: 25px;
    padding: 10px;
    border-left: 4px solid var(--primary);
    background-color: #00a1ff14;
}

.content h3 {
    font-size: 21px;
    color: var(--primary-dark);
}

.content h4 {
    font-size: 18px;
}

.content h5,
.content h6 {
    font-size: 16px;
}

.content ul,
.content ol {
    margin: 18px 0 25px;
    padding-left: 28px;
}

.content li {
    margin-bottom: 10px;
    padding-left: 5px;
}

.content li::marker {
    color: var(--primary);
    font-weight: 700;
}

.content blockquote {
    margin: 25px 0;
    padding: 18px 22px;
    background: var(--primary-lighter);
    border-left: 4px solid var(--primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: #425673;
    font-style: italic;
}

.content table {
    width: 100%;
    margin: 25px 0;
    border-collapse: collapse;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.content th {
    padding: 14px 16px;
    color: var(--white);
    background: var(--primary);
    font-weight: 700;
    text-align: left;
}

.content td {
    padding: 13px 16px;
    border-bottom: 1px solid var(--border);
}

.content tr:last-child td {
    border-bottom: none;
}

.content tr:nth-child(even) td {
    background: #f8faff;
}

.content tr:hover td {
    background: #eef5ff;
}

.content code {
    padding: 3px 7px;
    color: var(--primary-dark);
    background: var(--primary-light);
    border-radius: 5px;
    font-family:
        "SFMono-Regular",
        Consolas,
        "Liberation Mono",
        monospace;
    font-size: 0.9em;
}

.content pre {
    margin: 25px 0;
    padding: 20px;
    color: #e9f1ff;
    background: #10213d;
    border-radius: var(--radius-md);
    overflow-x: auto;
    box-shadow: var(--shadow-md);
}

.content pre code {
    padding: 0;
    color: inherit;
    background: transparent;
}

.content hr {
    height: 1px;
    margin: 35px 0;
    border: 0;
    background: linear-gradient(
        90deg,
        transparent,
        var(--border),
        transparent
    );
}

.content img {
    display: block;
    max-width: 100%;
    height: auto;
    margin: 25px auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

::selection {
    color: var(--white);
    background: var(--primary);
}

::-webkit-scrollbar {
    width: 9px;
}

::-webkit-scrollbar-track {
    background: #edf2f9;
}

::-webkit-scrollbar-thumb {
    background: #a9c5f7;
    border-radius: 20px;
    border: 2px solid #edf2f9;
}

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

button:focus-visible,
a:focus-visible {
    outline: 3px solid rgba(23, 105, 255, 0.3);
    outline-offset: 3px;
}

@keyframes pageFade {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-18px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes documentAppear {
    from {
        opacity: 0;
        transform: translateY(25px) scale(0.985);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes metaAppear {
    from {
        opacity: 0;
        transform: translateX(15px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes titleLine {
    from {
        width: 0;
        opacity: 0;
    }

    to {
        width: 55px;
        opacity: 1;
    }
}

@media (max-width: 800px) {
    body {
        padding: 80px 16px 40px;
    }

    .back-btn {
        top: 18px;
        left: 18px;
        width: 44px;
        height: 44px;
    }

    .document-switcher {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 6px;
        scrollbar-width: thin;
    }

    .switch-btn {
        flex-shrink: 0;
        white-space: nowrap;
    }

    .header {
        flex-direction: column;
        padding: 35px 30px 28px;
        gap: 22px;
    }

    .title {
        max-width: none;
    }

    .meta {
        width: 100%;
        text-align: left;
    }

    .content {
        padding: 35px 30px 42px;
        font-size: 15.5px;
    }
}

@media (max-width: 560px) {
    body {
        padding: 75px 10px 25px;
    }

    .back-btn {
        top: 15px;
        left: 15px;
        width: 42px;
        height: 42px;
    }

    .document-switcher {
        margin-bottom: 15px;
        gap: 7px;
    }

    .switch-btn {
        min-height: 40px;
        padding: 8px 13px;
        font-size: 12px;
        border-radius: 7px;
    }

    .switch-btn i {
        font-size: 13px;
    }

    .document {
        border-radius: 16px;
    }

    .document::before {
        height: 4px;
    }

    .header {
        padding: 30px 21px 24px;
        gap: 18px;
    }

    .title {
        font-size: 25px;
        letter-spacing: -0.4px;
    }

    .title::after {
        width: 42px;
        height: 3px;
        margin-top: 12px;
    }

    .meta {
        min-width: 0;
        padding: 10px 12px;
        font-size: 11.5px;
        border-radius: 10px;
    }

    .content {
        padding: 28px 21px 35px;
        font-size: 14.5px;
        line-height: 1.75;
    }

    .content p {
        margin-bottom: 18px;
    }

    .content h1 {
        font-size: 25px;
    }

    .content h2 {
        font-size: 21px;
        padding-left: 11px;
        border-left-width: 3px;
    }

    .content h3 {
        font-size: 18px;
    }

    .content ul,
    .content ol {
        padding-left: 23px;
    }

    .content table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .content th,
    .content td {
        padding: 10px 12px;
    }

    .content blockquote {
        padding: 14px 16px;
    }

    .content pre {
        padding: 15px;
        border-radius: 10px;
        font-size: 12px;
    }
}

@media (max-width: 360px) {
    body {
        padding-left: 7px;
        padding-right: 7px;
    }

    .header {
        padding-left: 17px;
        padding-right: 17px;
    }

    .content {
        padding-left: 17px;
        padding-right: 17px;
    }

    .title {
        font-size: 22px;
    }

    .content {
        font-size: 14px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

@media print {
    body {
        background: #fff;
        color: #000;
    }

    body > form {
        display: none;
    }

    .document {
        width: 100%;
        margin: 0;
        border: 0;
        border-radius: 0;
        box-shadow: none;
    }

    .header {
        padding: 20px 0;
        border-bottom: 1px solid #bbb;
        background: #fff;
    }

    .header::before,
    .header::after {
        display: none;
    }

    .content {
        padding: 30px 0;
    }

    .content h1,
    .content h2 {
        color: #000;
    }

    .content h2 {
        background: transparent;
        border-left-color: #333;
    }

    .content p {
        color: #000;
        font-size: 12pt;
        line-height: 1.7;
    }

    .meta {
        color: #333;
        background: #fff;
        border-color: #333;
    }
}

@media print {
    @page {
        size: A4;
        margin: 2.2cm 2.3cm 2.4cm 2.3cm;
    }

    @page :first {
        margin-top: 2.5cm;
    }

    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }

    html {
        background: #fff !important;
    }

    body {
        width: 100%;
        margin: 0;
        padding: 0;
        background: #fff !important;
        color: #111 !important;
        font-family: Georgia, "Times New Roman", Times, serif;
        font-size: 11pt;
        line-height: 1.65;
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    body > form {
        display: none !important;
    }

    .document {
        width: 100% !important;
        max-width: none !important;
        margin: 0 !important;
        padding: 0 !important;
        border: 0 !important;
        border-radius: 0 !important;
        background: #fff !important;
        box-shadow: none !important;
        overflow: visible !important;
    }

    .header {
        position: relative;
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 30px;
        width: 100%;
        padding: 0 0 18px !important;
        margin: 0 0 28px !important;
        background: #fff !important;
        border: 0 !important;
        border-bottom: 1px solid #222 !important;
        border-radius: 0 !important;
    }

    .header::before,
    .header::after {
        display: none !important;
    }

    .title {
        position: static;
        color: #111 !important;
        font-family: Georgia, "Times New Roman", Times, serif;
        font-size: 20pt !important;
        line-height: 1.25;
        font-weight: bold;
        letter-spacing: 0;
    }

    .meta {
        position: static;
        padding: 0 !important;
        margin: 0 !important;
        background: transparent !important;
        border: 0 !important;
        border-left: 0 !important;
        border-radius: 0 !important;
        color: #444 !important;
        font-family: Arial, Helvetica, sans-serif;
        font-size: 8.5pt !important;
        line-height: 1.55;
        text-align: right;
        white-space: nowrap;
    }

    .content {
        width: 100% !important;
        max-width: none !important;
        padding: 0 !important;
        margin: 0 !important;
        color: #111 !important;
        animation: none !important;
    }

    .content h1 {
        margin: 0 0 26px !important;
        padding: 0 !important;
        color: #111 !important;
        font-family: Georgia, "Times New Roman", Times, serif;
        font-size: 18pt !important;
        line-height: 1.3;
        font-weight: bold;
        letter-spacing: 0;
        text-align: center;
        page-break-after: avoid;
        break-after: avoid;
    }

    .content h1::after {
        display: none !important;
    }

    .content h2 {
        margin: 24px 0 12px !important;
        padding: 0 !important;
        color: #111 !important;
        background: transparent !important;
        border: 0 !important;
        border-left: 0 !important;
        border-radius: 0 !important;
        font-family: Georgia, "Times New Roman", Times, serif;
        font-size: 12.5pt !important;
        line-height: 1.4;
        font-weight: bold;
        page-break-after: avoid;
        break-after: avoid;
        page-break-inside: avoid;
        break-inside: avoid;
    }

    .content p {
        margin: 0 0 10px !important;
        color: #111 !important;
        font-family: Georgia, "Times New Roman", Times, serif;
        font-size: 11pt !important;
        line-height: 1.65;
        text-align: justify;
        text-indent: 0;
        orphans: 3;
        widows: 3;
    }

    .content strong,
    .content b {
        color: #111 !important;
        font-weight: bold;
    }

    .content a {
        color: #111 !important;
        text-decoration: none !important;
    }

    h1,
    h2 {
        page-break-inside: avoid;
        break-inside: avoid;
    }

    p {
        page-break-inside: avoid;
        break-inside: auto;
    }

    h2 + p {
        page-break-before: avoid;
        break-before: avoid;
    }

    button,
    input,
    textarea,
    select {
        display: none !important;
    }

    table {
        width: 100%;
        border-collapse: collapse;
        page-break-inside: auto;
        break-inside: auto;
    }

    thead {
        display: table-header-group;
    }

    tr {
        page-break-inside: avoid;
        break-inside: avoid;
    }

    th,
    td {
        border: 1px solid #555;
        padding: 6px 8px;
        color: #111;
        font-size: 10pt;
    }

    th {
        font-weight: bold;
        background: #f2f2f2 !important;
    }

    img {
        max-width: 100% !important;
        page-break-inside: avoid;
        break-inside: avoid;
    }

    pre,
    code {
        font-family: "Courier New", Courier, monospace;
        color: #111;
        background: #f5f5f5 !important;
    }

    pre {
        padding: 10px;
        border: 1px solid #999;
        white-space: pre-wrap;
        page-break-inside: avoid;
        break-inside: avoid;
    }
}