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

:root {
    --ym-bg: #f3f4f8;
    --ym-main: #44567a;
    --ym-main-soft: #56698f;
    --ym-pale: #e1e5ef;
    --ym-text: #262b36;
    --ym-muted: #586174;
    --ym-white: #ffffff;
    --ym-line: #d5dae6;
    --ym-font: Arial, "Segoe UI", sans-serif;
    --ym-rad-s: 6px;
    --ym-rad-m: 10px;
    --ym-shadow: 0 2px 8px rgba(38, 43, 54, .05);
}

html { overflow-x: hidden; }

body {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    background: var(--ym-bg);
    font-family: var(--ym-font);
    font-size: 16px;
    line-height: 1.65;
    color: var(--ym-text);
    overflow-x: hidden;
}

a {
    color: var(--ym-main);
    text-decoration: underline;
    text-underline-offset: 3px;
}
a:hover { color: var(--ym-text); }

/* ---- top bar ---- */
.ym-top {
    background: var(--ym-white);
    border-top: 3px solid var(--ym-main);
    border-bottom: 1px solid var(--ym-line);
}
.ym-top__inner {
    max-width: 1040px;
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 6px 18px;
}
.ym-top__logo {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    font-size: 21px;
    font-weight: 700;
    letter-spacing: .03em;
    color: var(--ym-main);
    text-decoration: none;
}
.ym-top__logo::before {
    content: "";
    width: 12px;
    height: 12px;
    border-radius: 3px;
    background: var(--ym-pale);
    border: 2px solid var(--ym-main);
}
.ym-top__logo:hover { color: var(--ym-main-soft); }
.ym-top__back {
    font-size: 13px;
    color: var(--ym-muted);
}

/* ---- intro ---- */
.ym-intro {
    max-width: 860px;
    width: 100%;
    margin: 0 auto;
    padding: 42px 20px 18px;
}
.ym-intro__title {
    font-size: clamp(26px, 4vw, 38px);
    line-height: 1.25;
    font-weight: 700;
    color: var(--ym-text);
}
.ym-intro__lead {
    margin-top: 10px;
    max-width: 640px;
    color: var(--ym-muted);
}
.ym-intro__date {
    display: inline-block;
    margin-top: 14px;
    font-size: 13px;
    color: var(--ym-muted);
    border-left: 3px solid var(--ym-main);
    padding-left: 10px;
}

/* ---- overview of topic chips (static) ---- */
.ym-overview {
    margin-top: 22px;
    padding: 14px 16px;
    background: var(--ym-white);
    border: 1px solid var(--ym-line);
    border-radius: var(--ym-rad-m);
}
.ym-overview__caption {
    display: block;
    margin-bottom: 8px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--ym-muted);
}
.ym-overview__list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    list-style: none;
}

/* ---- chips ---- */
.ym-chip {
    display: inline-block;
    padding: 3px 10px;
    border-radius: var(--ym-rad-s);
    background: var(--ym-pale);
    border: 1px solid #ccd3e2;
    font-size: 12px;
    font-weight: 700;
    line-height: 1.5;
    color: var(--ym-main);
    cursor: default;
    user-select: none;
}
.ym-chip--quiet {
    background: var(--ym-white);
    color: var(--ym-muted);
}

/* ---- section cards ---- */
.ym-sheet {
    max-width: 860px;
    width: 100%;
    margin: 0 auto;
    padding: 8px 20px 56px;
    display: grid;
    gap: 14px;
}
.ym-card {
    background: var(--ym-white);
    border: 1px solid var(--ym-line);
    border-radius: var(--ym-rad-m);
    box-shadow: var(--ym-shadow);
    padding: 20px 22px;
    min-width: 0;
}
.ym-card__chips {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 10px;
}
.ym-card__title {
    font-size: clamp(18px, 2.4vw, 22px);
    line-height: 1.3;
    font-weight: 700;
    color: var(--ym-main);
    margin-bottom: 10px;
}
.ym-card__body p { margin-bottom: 10px; color: var(--ym-text); }
.ym-card__body p:last-child { margin-bottom: 0; }
.ym-card__body ul,
.ym-card__body ol {
    margin: 0 0 10px;
    padding-left: 22px;
}
.ym-card__body li { margin-bottom: 6px; }
.ym-card__body li::marker { color: var(--ym-main); font-weight: 700; }
.ym-card__body ul:last-child,
.ym-card__body ol:last-child { margin-bottom: 0; }

/* ---- note box ---- */
.ym-note {
    margin: 12px 0;
    padding: 13px 16px;
    background: var(--ym-bg);
    border: 1px solid var(--ym-line);
    border-radius: var(--ym-rad-s);
    font-size: 15px;
}
.ym-note:last-child { margin-bottom: 0; }

/* ---- key / value list ---- */
.ym-kv {
    margin: 10px 0;
    border: 1px solid var(--ym-line);
    border-radius: var(--ym-rad-s);
    overflow: hidden;
}
.ym-kv:last-child { margin-bottom: 0; }
.ym-kv__row {
    display: grid;
    grid-template-columns: minmax(130px, 36%) 1fr;
    gap: 2px 14px;
    padding: 10px 14px;
    font-size: 15px;
}
.ym-kv__row + .ym-kv__row { border-top: 1px solid var(--ym-line); }
.ym-kv__key { font-weight: 700; color: var(--ym-main); }
.ym-kv__val { color: var(--ym-text); }

/* ---- table ---- */
.ym-scroll { width: 100%; overflow-x: auto; }
.ym-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
    border: 1px solid var(--ym-line);
}
.ym-table th {
    background: var(--ym-pale);
    color: var(--ym-main);
    text-align: left;
    padding: 10px 12px;
    font-size: 14px;
}
.ym-table td {
    padding: 10px 12px;
    border-top: 1px solid var(--ym-line);
    vertical-align: top;
}

/* ---- closing remark ---- */
.ym-endnote {
    max-width: 860px;
    width: 100%;
    margin: -30px auto 0;
    padding: 0 20px 50px;
}
.ym-endnote__box {
    padding: 14px 18px;
    border: 1px dashed #b9c1d3;
    border-radius: var(--ym-rad-m);
    font-size: 14px;
    color: var(--ym-muted);
    text-align: center;
}

/* ---- footer ---- */
.ym-base {
    margin-top: auto;
    flex-shrink: 0;
    background: var(--ym-white);
    border-top: 1px solid var(--ym-line);
    padding: 26px 20px 28px;
    text-align: center;
}
.ym-base__inner { max-width: 880px; margin: 0 auto; }
.ym-base__links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 20px;
    margin-bottom: 14px;
}
.ym-base__links a { font-size: 13px; }
.ym-base__copy {
    font-size: 12px;
    color: var(--ym-muted);
    margin-bottom: 10px;
}
.ym-base__legal {
    max-width: 740px;
    margin: 0 auto;
    font-size: 11px;
    line-height: 1.7;
    color: var(--ym-muted);
}

@media (max-width: 560px) {
    .ym-kv__row { grid-template-columns: 1fr; }
    .ym-card { padding: 16px 15px; }
    .ym-intro { padding-top: 32px; }
}
@media (max-width: 420px) {
    .ym-top__inner { justify-content: center; text-align: center; }
    .ym-sheet { padding-left: 12px; padding-right: 12px; }
    .ym-intro { padding-left: 14px; padding-right: 14px; }
    .ym-endnote { padding-left: 12px; padding-right: 12px; }
}