:root {
    --ink: #0f1c2e;
    --ink-soft: #475569;
    --line: #e2e8f0;
    --bg: #f6f8fb;
    --brand: #1f6feb;
    --brand-dark: #1a5fd0;
    --accent: #0ea5a8;
    --radius: 14px;
}

html, body {
    font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--ink);
    background: var(--bg);
    letter-spacing: -0.01em;
}

main { min-height: 70vh; }

h1, h2, h3, h4 { letter-spacing: -0.02em; }
h1:focus, h1:focus-visible { outline: none; }

.eyebrow {
    display: inline-block;
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--brand);
    margin-bottom: .35rem;
}

/* NAV */
.site-nav {
    background: rgba(255, 255, 255, .9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
}
.brand-mark {
    width: 38px; height: 38px; border-radius: 11px;
    display: inline-flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, var(--brand), var(--accent));
    color: #fff; font-size: 20px;
}
.site-nav .nav-link { color: var(--ink-soft); font-weight: 500; }
.site-nav .nav-link:hover, .site-nav .nav-link.active { color: var(--brand); }

/* BUTTONS */
.btn-primary { --bs-btn-bg: var(--brand); --bs-btn-border-color: var(--brand); --bs-btn-hover-bg: var(--brand-dark); --bs-btn-hover-border-color: var(--brand-dark); }
.btn { border-radius: 10px; font-weight: 600; }

/* HERO */
.hero {
    background:
        radial-gradient(900px 420px at 12% -10%, rgba(31,111,235,.10), transparent 60%),
        radial-gradient(700px 360px at 95% 0%, rgba(14,165,168,.10), transparent 55%),
        #fff;
    border-bottom: 1px solid var(--line);
}
.hero h1 { font-size: clamp(2rem, 4.4vw, 3.4rem); line-height: 1.05; }
.tag-live {
    display: inline-flex; align-items: center; gap: .5rem;
    padding: .35rem .8rem; border-radius: 999px;
    background: rgba(16,185,129,.08); border: 1px solid rgba(16,185,129,.25);
    color: #0f9d63; font-size: .85rem;
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: #10b981; box-shadow: 0 0 0 3px rgba(16,185,129,.2); }

/* CARDS */
.card-soft {
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    transition: box-shadow .18s ease, transform .18s ease;
    height: 100%;
}
.card-soft:hover { box-shadow: 0 10px 30px rgba(15,28,46,.08); transform: translateY(-2px); }

.chip {
    display: inline-flex; align-items: center; gap: .4rem;
    padding: .5rem .85rem; border-radius: 10px;
    background: #fff; border: 1px solid var(--line); font-size: .9rem;
}

.pkg-featured { border-color: var(--brand); box-shadow: 0 12px 36px rgba(31,111,235,.14); position: relative; }
.pkg-badge {
    position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
    background: var(--brand); color: #fff; font-size: .72rem; font-weight: 700;
    padding: .25rem .7rem; border-radius: 999px;
}
.pkg-price { font-size: 2rem; font-weight: 800; }
.feature-off { color: #94a3b8; text-decoration: line-through; }

.norm-doc { font-weight: 700; color: var(--brand); font-size: .92rem; }

/* CALCULATOR */
.step-num {
    display: inline-flex; align-items: center; justify-content: center;
    width: 26px; height: 26px; border-radius: 8px; margin-right: .6rem;
    background: var(--brand); color: #fff; font-size: .85rem; font-weight: 700;
}
.accordion-button:not(.collapsed) { background: rgba(31,111,235,.06); color: var(--ink); box-shadow: none; }
.accordion-button:focus { box-shadow: none; border-color: var(--line); }

.result-panel {
    position: sticky; top: 90px;
    background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: 0 10px 30px rgba(15,28,46,.06);
}
.result-value { font-size: 3rem; font-weight: 800; line-height: 1; margin-bottom: .75rem; }
.result-breakdown td { padding: .35rem .25rem; border-color: var(--line); }
.formula { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; background: #f1f5f9; padding: .6rem .7rem; border-radius: 8px; }

.rf-presets { max-height: 320px; overflow-y: auto; }

/* REGION COMBOBOX */
.region-select { position: relative; }
.region-menu {
    position: absolute; z-index: 1080; top: calc(100% + 4px); left: 0; right: 0;
    background: #fff; border: 1px solid var(--line); border-radius: 10px;
    box-shadow: 0 12px 32px rgba(15,28,46,.12);
    max-height: 300px; overflow-y: auto; padding: 4px;
}
.region-item {
    display: flex; align-items: baseline; justify-content: space-between; gap: 10px;
    width: 100%; text-align: left; border: none; background: transparent;
    padding: 7px 10px; border-radius: 7px; cursor: pointer;
}
.region-item:hover { background: rgba(31,111,235,.08); }
.region-item.active { background: rgba(31,111,235,.14); }
.region-name { font-size: .92rem; }
.region-grp { font-size: .78rem; color: #64748b; white-space: nowrap; }
.region-empty { padding: 10px; color: #94a3b8; font-size: .9rem; }

/* ====== СПЛЭШ ЗАГРУЗКИ: Newton's Sun & Moon + радиальный прогресс ====== */
.sm-loader {
    --saturation: 80;
    --lightness: 60;
    position: fixed; inset: 0; z-index: 2000;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 1.5rem;
    background: hsl(210, calc(var(--saturation) * 1%), calc(var(--lightness) * 1%));
    transition: background-color .2s linear;
}
.sunny-moony { display: block; width: min(58vmin, 320px); height: auto; overflow: visible; }

/* Цвета Newton-анимации (управляются GSAP через --saturation/--lightness) */
.sm-loader .moon__cloud, .sm-loader .sun__cloud { fill: #00f; display: none; }
.sm-loader .cloud--static { fill: hsl(0, 0%, calc(var(--lightness) * 1%)); }
.sm-loader .cloud-path { fill: #bfbfbf; }
.sm-loader .moon { fill: hsl(0, 0%, calc(var(--lightness) * 1%)); }
.sm-loader .stars-path { fill: #d2ccac; }
.sm-loader .sun, .sm-loader .sun__ray { fill: hsl(50, calc(var(--saturation) * 1%), calc(var(--lightness) * 1%)); }

/* Радиальный прогрессбар с процентами */
.sm-progress { position: relative; width: 92px; height: 92px; display: grid; place-items: center; }
.loading-progress { position: absolute; inset: 0; width: 92px; height: 92px; }
.loading-progress circle {
    fill: none; stroke: rgba(255,255,255,.25); stroke-width: 5px;
    transform-origin: 50% 50%; transform: rotate(-90deg);
}
.loading-progress circle:last-child {
    stroke: #f3c163;
    stroke-dasharray: calc(3.141 * var(--blazor-load-percentage, 0%) * 0.8), 500%;
    transition: stroke-dasharray .1s ease-in-out;
}
.loading-progress-text {
    position: relative; z-index: 1; font-weight: 800; font-size: 1.05rem;
    color: #fff; text-shadow: 0 1px 4px rgba(0,0,0,.35);
}
.loading-progress-text:after { content: var(--blazor-load-percentage-text, "0%"); }
.sm-caption {
    font-family: -apple-system, "Segoe UI", Roboto, sans-serif;
    font-weight: 700; letter-spacing: .02em; color: #fff;
    text-shadow: 0 1px 6px rgba(0,0,0,.35); font-size: 1rem;
}

#blazor-error-ui { background: #fee2e2; bottom: 0; box-shadow: 0 -1px 2px rgba(0,0,0,.2); display: none; left: 0; padding: .6rem 1.25rem; position: fixed; width: 100%; z-index: 1000; }
#blazor-error-ui .dismiss { cursor: pointer; position: absolute; right: .75rem; top: .5rem; }

.site-footer { background: #fff; border-top: 1px solid var(--line); margin-top: 3rem; }

/* ====== ПЕЧАТНЫЙ ОТЧЁТ / ВЫНОСКА ====== */
.print-report { display: none; }

.pr-stamp {
    max-width: 720px; margin: 0 auto; color: #0f1c2e;
    font-family: "Segoe UI", Roboto, Arial, sans-serif;
}
.pr-head {
    display: flex; justify-content: space-between; align-items: flex-end;
    border-bottom: 3px solid var(--brand); padding-bottom: 10px; margin-bottom: 14px;
}
.pr-title { font-size: 24px; font-weight: 800; letter-spacing: -.02em; }
.pr-sub { font-size: 11px; color: #475569; max-width: 52ch; }
.pr-brand { font-size: 18px; font-weight: 800; color: var(--brand); }

.pr-req { width: 100%; border-collapse: collapse; margin-bottom: 16px; font-size: 12.5px; }
.pr-req td { padding: 4px 8px; border: 1px solid var(--line); }
.pr-req .k { color: #64748b; width: 18%; background: #f8fafc; }
.pr-req .v { font-weight: 600; width: 32%; }

.pr-section {
    font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em;
    color: var(--brand); border-bottom: 1px solid var(--line); padding-bottom: 4px; margin-bottom: 6px;
}
.pr-table { width: 100%; border-collapse: collapse; font-size: 12.5px; margin-bottom: 14px; }
.pr-table td { padding: 5px 8px; border-bottom: 1px solid #eef2f7; }
.pr-table td:last-child { text-align: right; font-weight: 600; width: 34%; }

.pr-formula {
    font-family: Consolas, "Cascadia Code", monospace; font-size: 12.5px;
    background: #f1f5f9; padding: 8px 10px; border-radius: 6px; text-align: center; margin-bottom: 16px;
}

.pr-result {
    display: grid; grid-template-columns: 1fr auto auto auto; align-items: center; gap: 14px;
    border: 2px solid var(--brand); border-radius: 10px; padding: 12px 16px;
}
.pr-result-label { font-weight: 700; }
.pr-result-value { font-size: 26px; font-weight: 800; }
.pr-result.ok .pr-result-value { color: #16a34a; }
.pr-result.fail .pr-result-value { color: #dc2626; }
.pr-result-norm { color: #64748b; font-size: 12.5px; }
.pr-result-badge { font-size: 11px; font-weight: 800; color: #fff; padding: 5px 10px; border-radius: 999px; white-space: nowrap; }
.pr-result.ok .pr-result-badge { background: #16a34a; }
.pr-result.fail .pr-result-badge { background: #dc2626; }

.pr-note { font-size: 9.5px; font-style: italic; color: #94a3b8; margin-top: 12px; }

@media print {
    .site-nav, .site-footer { display: none !important; }
    main > .container { display: none !important; }
    .print-report { display: block !important; }
    body { background: #fff !important; }
    @page { margin: 14mm; size: A4; }
    .pr-result, .pr-req td, .pr-formula { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
}

/* ====== ПЕРЕКЛЮЧАТЕЛЬ ТЕМЫ (morphing icon) ====== */
.theme {
    --primary: #5b9fff;
    --primaryT: rgba(91,159,255,0);
    --transDur: 0.3s;
    font-size: 9px;
    display: flex; align-items: center;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}
.theme__icon { transition: transform var(--transDur) ease-in-out; }
.theme__icon, .theme__toggle { z-index: 1; }
.theme__icon, .theme__icon-part { position: absolute; }
.theme__icon { display: block; top: 0.75em; left: 0.75em; width: 1.5em; height: 1.5em; }
.theme__icon-part {
    border-radius: 50%;
    box-shadow: 0.4em -0.4em 0 0.5em #fff inset;
    top: calc(50% - 0.5em); left: calc(50% - 0.5em);
    width: 1em; height: 1em;
    transition: box-shadow var(--transDur) ease-in-out, opacity var(--transDur) ease-in-out, transform var(--transDur) ease-in-out;
    transform: scale(0.5);
}
.theme__icon-part ~ .theme__icon-part {
    background-color: #fff; border-radius: 0.05em; box-shadow: none;
    top: 50%; left: calc(50% - 0.05em);
    transform: rotate(0deg) translateY(0.5em); transform-origin: 50% 0;
    width: 0.1em; height: 0.2em;
}
.theme__icon-part:nth-child(3) { transform: rotate(45deg) translateY(0.5em); }
.theme__icon-part:nth-child(4) { transform: rotate(90deg) translateY(0.5em); }
.theme__icon-part:nth-child(5) { transform: rotate(135deg) translateY(0.5em); }
.theme__icon-part:nth-child(6) { transform: rotate(180deg) translateY(0.5em); }
.theme__icon-part:nth-child(7) { transform: rotate(225deg) translateY(0.5em); }
.theme__icon-part:nth-child(8) { transform: rotate(270deg) translateY(0.5em); }
.theme__icon-part:nth-child(9) { transform: rotate(315deg) translateY(0.5em); }
.theme__toggle, .theme__toggle-wrap { position: relative; }
.theme__toggle, .theme__toggle:before { display: block; }
.theme__toggle {
    background-color: hsl(48,90%,85%);
    border-radius: 25% / 50%;
    box-shadow: 0 0 0 0.125em var(--primaryT);
    padding: 0.25em; width: 6em; height: 3em; margin: 0;
    -webkit-appearance: none; appearance: none; cursor: pointer;
    transition: background-color var(--transDur) ease-in-out, box-shadow 0.15s ease-in-out, transform var(--transDur) ease-in-out;
}
.theme__toggle:before {
    background-color: hsl(48,90%,55%); border-radius: 50%; content: "";
    width: 2.5em; height: 2.5em;
    transition: background-color var(--transDur) ease-in-out, transform var(--transDur) ease-in-out;
}
.theme__toggle:focus-visible { box-shadow: 0 0 0 0.125em var(--primary); outline: transparent; }
.theme__toggle:checked { background-color: hsl(198,90%,15%); }
.theme__toggle:checked:before, .theme__toggle:checked ~ .theme__icon { transform: translateX(3em); }
.theme__toggle:checked:before { background-color: hsl(198,90%,55%); }
.theme__toggle:checked ~ .theme__icon .theme__icon-part:nth-child(1) {
    box-shadow: 0.2em -0.2em 0 0.2em #fff inset; transform: scale(1);
}
.theme__toggle:checked ~ .theme__icon .theme__icon-part ~ .theme__icon-part { opacity: 0; }
.theme__toggle:checked ~ .theme__icon .theme__icon-part:nth-child(2) { transform: rotate(45deg) translateY(0.8em); }
.theme__toggle:checked ~ .theme__icon .theme__icon-part:nth-child(3) { transform: rotate(90deg) translateY(0.8em); }
.theme__toggle:checked ~ .theme__icon .theme__icon-part:nth-child(4) { transform: rotate(135deg) translateY(0.8em); }
.theme__toggle:checked ~ .theme__icon .theme__icon-part:nth-child(5) { transform: rotate(180deg) translateY(0.8em); }
.theme__toggle:checked ~ .theme__icon .theme__icon-part:nth-child(6) { transform: rotate(225deg) translateY(0.8em); }
.theme__toggle:checked ~ .theme__icon .theme__icon-part:nth-child(7) { transform: rotate(270deg) translateY(0.8em); }
.theme__toggle:checked ~ .theme__icon .theme__icon-part:nth-child(8) { transform: rotate(315deg) translateY(0.8em); }
.theme__toggle:checked ~ .theme__icon .theme__icon-part:nth-child(9) { transform: rotate(360deg) translateY(0.8em); }
.theme__toggle-wrap { margin: 0; }

/* ====== ЛОГОТИП ПО ТЕМЕ ====== */
.logo-on-dark { display: none; }
[data-bs-theme="dark"] .logo-on-light { display: none; }
[data-bs-theme="dark"] .logo-on-dark { display: inline-block; }

/* ====== ТЁМНАЯ ТЕМА (тёмно-синий фон как в оригинале) ====== */
[data-bs-theme="dark"] {
    --ink: #eef4ff;
    --ink-soft: #8fa3c8;
    --line: rgba(255,255,255,.10);
    --bg: #07101f;
    --brand: #5b9fff;
    --brand-dark: #4a8af0;
    --accent: #7b61ff;
    --bs-body-color: #eef4ff;
    --bs-body-bg: #07101f;
}
[data-bs-theme="dark"] body {
    background:
        radial-gradient(800px 500px at 10% 0%, rgba(91,159,255,.16), transparent 55%),
        radial-gradient(700px 400px at 95% 5%, rgba(123,97,255,.14), transparent 55%),
        var(--bg);
    color: var(--ink);
}
[data-bs-theme="dark"] .site-nav { background: rgba(7,16,31,.85); border-bottom-color: var(--line); }
[data-bs-theme="dark"] .site-nav .nav-link { color: var(--ink-soft); }
[data-bs-theme="dark"] .site-nav .nav-link:hover,
[data-bs-theme="dark"] .site-nav .nav-link.active { color: var(--brand); }
[data-bs-theme="dark"] .hero {
    background:
        radial-gradient(900px 420px at 12% -10%, rgba(91,159,255,.16), transparent 60%),
        radial-gradient(700px 360px at 95% 0%, rgba(123,97,255,.14), transparent 55%),
        #0a1626;
    border-bottom-color: var(--line);
}
[data-bs-theme="dark"] .card-soft,
[data-bs-theme="dark"] .chip,
[data-bs-theme="dark"] .result-panel { background: rgba(255,255,255,.04); border-color: var(--line); color: var(--ink); }
[data-bs-theme="dark"] .card-soft:hover { box-shadow: 0 10px 30px rgba(0,0,0,.45); }
[data-bs-theme="dark"] .site-footer { background: rgba(255,255,255,.02); border-top-color: var(--line); }
[data-bs-theme="dark"] .formula,
[data-bs-theme="dark"] .pr-formula { background: rgba(255,255,255,.06); color: var(--ink-soft); }
[data-bs-theme="dark"] .region-menu { background: #0e1a2e; border-color: var(--line); }
[data-bs-theme="dark"] .region-item:hover { background: rgba(91,159,255,.16); }
[data-bs-theme="dark"] .region-item.active { background: rgba(91,159,255,.24); }
[data-bs-theme="dark"] .accordion-button:not(.collapsed) { background: rgba(91,159,255,.14); color: var(--ink); }
[data-bs-theme="dark"] .bg-light { background-color: rgba(255,255,255,.06) !important; color: var(--ink) !important; }
[data-bs-theme="dark"] .bg-light-subtle { background-color: rgba(255,255,255,.03) !important; }
[data-bs-theme="dark"] .text-bg-light { background-color: rgba(255,255,255,.10) !important; color: var(--ink) !important; }
[data-bs-theme="dark"] .border { border-color: var(--line) !important; }