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

:root {
    --xrvPrimary: #a8322d;
    --xrvAccent: #2f9e8f;
    --xrvDeep: #4a1512;
    --xrvInk: #2b1b19;
    --xrvMuted: #6d5652;
    --xrvLine: #f0d9d4;
    --xrvPaper: #fffaf9;
    --xrvSurface: #fdf1ef;
    --xrvPanel: #ffffff;
    --xrvFontUi: "Helvetica Neue", Helvetica, Arial, sans-serif;
    --xrvFontText: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
    --xrvCurveS: 10px;
    --xrvCurveM: 16px;
    --xrvCurveL: 26px;
    --xrvLift1: 0 8px 20px rgba(74, 21, 18, .07);
    --xrvLift2: 0 16px 40px rgba(74, 21, 18, .11);
    --xrvLift3: 0 26px 60px rgba(74, 21, 18, .16);
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--xrvFontText);
    background:
        radial-gradient(circle at 12% -4%, rgba(47, 158, 143, .12), transparent 34%),
        linear-gradient(180deg, #fffaf9 0%, #fdf1ef 100%);
    color: var(--xrvInk);
    line-height: 1.74;
    font-size: 16px;
}

a {
    color: var(--xrvPrimary);
    text-decoration: none;
    transition: color .2s ease;
}
a:hover { color: var(--xrvAccent); }

.xrvTopBar {
    position: sticky;
    top: 0;
    z-index: 20;
    padding: 16px 20px;
    background: rgba(255, 250, 249, .9);
    backdrop-filter: blur(14px);
    border-bottom: 2px solid rgba(168, 50, 45, .14);
}
.xrvTopBarInner {
    max-width: 1160px;
    margin: 0 auto;
    text-align: center;
}
.xrvTopBarLogo {
    font-family: var(--xrvFontUi);
    font-size: 20px;
    letter-spacing: .22em;
    text-transform: uppercase;
    font-weight: 800;
    color: var(--xrvPrimary);
}

.xrvLede {
    max-width: 900px;
    margin: 0 auto;
    padding: 66px 20px 34px;
    border-bottom: 1px solid var(--xrvLine);
}
.xrvLedeKicker {
    font-family: var(--xrvFontUi);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .2em;
    text-transform: uppercase;
    color: var(--xrvAccent);
    margin-bottom: 12px;
}
.xrvLedeTitle {
    font-size: clamp(28px, 4.4vw, 46px);
    line-height: 1.14;
    color: var(--xrvDeep);
    font-weight: 600;
    margin-bottom: 14px;
}
.xrvLedeText {
    max-width: 660px;
    color: var(--xrvMuted);
    font-size: 17px;
}
.xrvLedeMeta {
    margin-top: 20px;
    display: inline-block;
    padding: 7px 14px;
    border-left: 3px solid var(--xrvPrimary);
    background: rgba(168, 50, 45, .06);
    font-family: var(--xrvFontUi);
    font-size: 13px;
    color: var(--xrvDeep);
}

.xrvSheet {
    max-width: 900px;
    margin: 0 auto;
    padding: 34px 20px 84px;
}
.xrvDoc {
    background: var(--xrvPanel);
    border: 1px solid var(--xrvLine);
    border-radius: var(--xrvCurveL);
    box-shadow: var(--xrvLift2);
    padding: 48px 52px;
}
@media (max-width: 740px) {
    .xrvDoc { padding: 28px 20px; border-radius: 18px; }
    .xrvLede { padding-top: 48px; }
}

.xrvDoc h2 {
    font-size: clamp(21px, 2.8vw, 29px);
    line-height: 1.22;
    color: var(--xrvDeep);
    font-weight: 600;
    margin: 40px 0 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--xrvLine);
}
.xrvDoc h2:first-child { margin-top: 0; }
.xrvDoc h3 {
    font-family: var(--xrvFontUi);
    font-size: 16px;
    line-height: 1.4;
    color: var(--xrvPrimary);
    margin: 24px 0 8px;
}
.xrvDoc p {
    color: var(--xrvMuted);
    margin-bottom: 14px;
}
.xrvDoc strong { color: var(--xrvInk); }

.xrvKeyTable {
    width: 100%;
    border-collapse: collapse;
    margin: 8px 0 30px;
    font-size: 15px;
    border: 1px solid var(--xrvLine);
    border-radius: var(--xrvCurveS);
    overflow: hidden;
}
.xrvKeyTable caption {
    caption-side: top;
    text-align: left;
    font-family: var(--xrvFontUi);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--xrvAccent);
    padding-bottom: 10px;
}
.xrvKeyTable th {
    background: var(--xrvDeep);
    color: #fff;
    text-align: left;
    padding: 12px 16px;
    font-family: var(--xrvFontUi);
    font-size: 13px;
    letter-spacing: .04em;
    font-weight: 700;
}
.xrvKeyTable td {
    padding: 13px 16px;
    border-top: 1px solid var(--xrvLine);
    color: var(--xrvMuted);
    vertical-align: top;
}
.xrvKeyTable td:first-child {
    color: var(--xrvInk);
    font-family: var(--xrvFontUi);
    font-size: 14px;
    font-weight: 700;
    width: 38%;
}
.xrvKeyTable tr:nth-child(even) td { background: rgba(253, 241, 239, .7); }

.xrvTier {
    margin: 0 0 18px;
    padding-left: 22px;
    color: var(--xrvMuted);
}
.xrvTier > li {
    margin-bottom: 9px;
    padding-left: 4px;
}
.xrvTier > li::marker { color: var(--xrvPrimary); }
.xrvTierInner {
    list-style: none;
    margin: 8px 0 12px;
    padding-left: 0;
}
.xrvTierInner li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 6px;
    font-size: 15px;
}
.xrvTierInner li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 12px;
    width: 9px;
    height: 2px;
    background: var(--xrvAccent);
}

.xrvNote {
    margin: 24px 0;
    padding: 18px 22px;
    border-radius: var(--xrvCurveS);
    background: rgba(47, 158, 143, .09);
    border-left: 4px solid var(--xrvAccent);
}
.xrvNote p { margin: 0; color: var(--xrvInk); font-size: 15px; }

.xrvWarn {
    margin: 24px 0;
    padding: 18px 22px;
    border-radius: var(--xrvCurveS);
    background: rgba(168, 50, 45, .07);
    border-left: 4px solid var(--xrvPrimary);
}
.xrvWarn p { margin: 0; color: var(--xrvInk); font-size: 15px; }

.xrvChipRow {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 18px 0 24px;
}
.xrvChip {
    font-family: var(--xrvFontUi);
    font-size: 13px;
    font-weight: 700;
    color: var(--xrvDeep);
    background: var(--xrvSurface);
    border: 1px solid var(--xrvLine);
    border-radius: 999px;
    padding: 6px 14px;
}

.xrvFooter {
    margin-top: 0;
    background: var(--xrvDeep);
    color: #d9b4ae;
    padding: 26px 20px 22px;
    font-family: var(--xrvFontUi);
    text-align: center;
    border-top: 3px solid var(--xrvPrimary);
}
.xrvFooterInner {
    max-width: 900px;
    margin: 0 auto;
}
.xrvFooterLinks {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 22px;
    margin-bottom: 12px;
}
.xrvFooterLinks a {
    color: #f0cfca;
    font-size: 12px;
    text-decoration: none;
}
.xrvFooterLinks a:hover { color: #fff; }
.xrvFooterCopy {
    font-size: 12px;
    color: #c69c96;
}