:root {
    --sber: #1f9d4c;
    --sber-strong: #147a3a;
    --sber-soft: #e8f5ec;
    --sber-muted: #8fd3a6;

    --bg: #f5f6f7;
    --surface: #ffffff;
    --surface-2: #eef0f2;
    --ink: #14181c;
    --ink-2: #565f69;
    --ink-3: #8b939c;
    --line: #e5e7ea;
    --line-strong: #d2d6db;
    --accent: var(--sber);
    --accent-strong: var(--sber-strong);
    --accent-soft: var(--sber-soft);
    --mark: #cdeed9;
    --danger: #d1352b;
    --danger-soft: #fbeceb;
    --shadow-sm: 0 1px 2px rgba(20, 24, 28, 0.05);
    --shadow: 0 10px 30px rgba(20, 24, 28, 0.08);
    --radius: 14px;
    --radius-sm: 10px;
    --radius-pill: 999px;
}

html[data-theme='dark'] {
    --bg: #0a0c0f;
    --surface: #131619;
    --surface-2: #191d21;
    --ink: #edf0f2;
    --ink-2: #9aa2ab;
    --ink-3: #656d76;
    --line: #202429;
    --line-strong: #2c3238;
    --accent: #34c76b;
    --accent-strong: #5cdb8b;
    --accent-soft: #0f2418;
    --mark: #163a26;
    --danger: #ec6a61;
    --danger-soft: #2a1414;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow: 0 14px 34px rgba(0, 0, 0, 0.4);
}

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

[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--ink);
    line-height: 1.55;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    transition: background .15s ease, color .15s ease;
}

/* ---------- Topbar ---------- */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 24px;
    background: var(--surface);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 50;
}

.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand__mark {
    width: 26px; height: 26px; border-radius: 8px;
    background: var(--accent);
    color: #fff;
    display: grid;
    place-items: center;
    flex-shrink: 0;
}
.brand__mark svg { width: 15px; height: 15px; }
.brand__name { font-weight: 700; letter-spacing: -0.01em; font-size: 15px; color: var(--ink); }

.tabs {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    padding: 3px;
    background: var(--surface-2);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    margin: 0 auto;
}

.tab {
    border: none;
    background: transparent;
    color: var(--ink-2);
    font-size: 13px;
    font-weight: 600;
    padding: 7px 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: color .15s ease, background .15s ease;
    white-space: nowrap;
}
.tab:hover { color: var(--ink); }
.tab--active {
    background: var(--surface);
    color: var(--ink);
    box-shadow: var(--shadow-sm);
}

.theme-toggle {
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--ink-2);
    width: 34px; height: 34px;
    border-radius: var(--radius-sm);
    display: grid;
    place-items: center;
    cursor: pointer;
    font-size: 15px;
    transition: border-color .15s ease, color .15s ease;
    flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--line-strong); color: var(--ink); }

/* ---------- Mode switcher ---------- */
.mode-switcher {
    display: flex;
    align-items: stretch;
    gap: 2px;
    max-width: 820px;
    margin: 0 auto 36px;
    padding: 3px;
    background: var(--surface-2);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
}
.mode-card {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 10px 14px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background .15s ease, box-shadow .15s ease;
    text-align: left;
}
.mode-card:hover { background: var(--surface); }
.mode-card--active {
    background: var(--surface);
    box-shadow: var(--shadow-sm);
}
.mode-card__icon {
    width: 30px; height: 30px;
    flex-shrink: 0;
    display: grid;
    place-items: center;
    border-radius: 7px;
    background: var(--surface-2);
    color: var(--ink-3);
    transition: background .15s ease, color .15s ease;
}
.mode-card__icon svg { width: 16px; height: 16px; }
.mode-card--active .mode-card__icon { background: var(--accent-soft); color: var(--accent-strong); }
.mode-card__title { font-size: 13px; font-weight: 700; color: var(--ink); display: block; line-height: 1.3; }
.mode-card__desc { font-size: 11px; color: var(--ink-3); line-height: 1.3; display: block; }

/* ---------- Layout ---------- */
.wrap { max-width: 900px; margin: 0 auto; padding: 0 22px 80px; }

.intro { padding: 40px 0 14px; text-align: center; }
.intro h1 {
    font-size: clamp(21px, 3.6vw, 28px);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--ink);
    line-height: 1.25;
    margin-bottom: 10px;
}
.intro__sub {
    max-width: 480px;
    margin: 0 auto 26px;
    color: var(--ink-3);
    font-size: 14px;
    line-height: 1.5;
}

/* ---------- Search ---------- */
.search {
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: 680px;
    margin: 0 auto;
    background: var(--surface);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    padding: 5px 5px 5px 16px;
    transition: border-color .15s ease, box-shadow .15s ease;
}
.search:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}
.search__icon { width: 18px; height: 18px; color: var(--ink-3); flex-shrink: 0; }

#query {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    font-size: 14.5px;
    color: var(--ink);
    padding: 11px 4px;
    min-width: 0;
}
#query::placeholder { color: var(--ink-3); }

#search-btn {
    border: none;
    background: var(--accent);
    color: #fff;
    font-size: 13.5px;
    font-weight: 600;
    padding: 11px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: background .15s ease;
    white-space: nowrap;
}
#search-btn:hover { background: var(--accent-strong); }
#search-btn:active { background: var(--accent-strong); }

/* ---------- Chips ---------- */
.chips {
    display: flex; flex-wrap: wrap; gap: 8px;
    justify-content: center; margin-top: 18px;
}
.chip {
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--ink-2);
    padding: 7px 13px;
    border-radius: 8px;
    font-size: 12.5px;
    font-weight: 500;
    cursor: pointer;
    transition: border-color .15s ease, color .15s ease, background .15s ease;
}
.chip:hover {
    border-color: var(--line-strong);
    color: var(--ink);
    background: var(--surface-2);
}

/* ---------- Sections ---------- */
.section-head {
    display: flex; align-items: baseline; justify-content: space-between;
    margin: 46px 0 14px;
}
.section-head h2 {
    font-size: 12.5px;
    font-weight: 700;
    color: var(--ink-2);
    text-transform: uppercase;
    letter-spacing: .05em;
}
.meta { color: var(--ink-3); font-size: 12px; font-weight: 500; }

.ghost-btn {
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--ink-2);
    font-weight: 600;
    font-size: 12.5px;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: border-color .15s ease, color .15s ease;
}
.ghost-btn:hover { border-color: var(--line-strong); color: var(--ink); }

/* ---------- Cards ---------- */
.cards { display: flex; flex-direction: column; gap: 10px; }
.card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 18px 20px;
    transition: border-color .15s ease;
}
.card:hover { border-color: var(--line-strong); }

.card__top {
    display: flex; align-items: center; gap: 10px;
    margin-bottom: 10px;
}
.tag {
    font-size: 10.5px;
    font-weight: 700;
    padding: 3px 9px;
    border-radius: 6px;
    letter-spacing: .03em;
    text-transform: uppercase;
    background: var(--surface-2);
    color: var(--ink-2);
}
.tag--section { background: var(--surface-2); color: var(--ink-2); }
.tag--news { background: var(--surface-2); color: var(--ink-2); }
.tag--quik { background: var(--surface-2); color: var(--ink-2); }
.tag--broker { background: var(--surface-2); color: var(--ink-2); }
.tag--answer { background: var(--accent-soft); color: var(--accent-strong); }
.tag--ai { background: var(--accent-soft); color: var(--accent-strong); }

.card h3 {
    font-size: 15.5px; font-weight: 700; line-height: 1.4;
    margin-bottom: 7px; color: var(--ink); letter-spacing: -0.01em;
}
.card__snippet { color: var(--ink-2); font-size: 13.5px; line-height: 1.55; }
.card__snippet mark { background: var(--mark); color: var(--accent-strong); padding: 0 3px; border-radius: 4px; font-weight: 600; }

.card__link {
    display: inline-flex; align-items: center; gap: 6px;
    margin-top: 12px;
    color: var(--ink-2); font-weight: 600; font-size: 13px;
    text-decoration: none;
    transition: color .15s ease;
}
.card__link:hover { color: var(--accent-strong); }
.card__link svg { width: 13px; height: 13px; }

.card__date { color: var(--ink-3); font-size: 12px; font-weight: 500; }
.card__date svg { width: 13px; height: 13px; vertical-align: -2px; margin-right: 4px; }

/* ---------- Answer card ---------- */
.card.answer {
    border-color: var(--line-strong);
    border-left: 3px solid var(--accent);
}
.answer__steps {
    margin: 8px 0 6px;
    padding-left: 22px;
    color: var(--ink);
    font-size: 14px;
}
.answer__steps li { margin: 6px 0; }
.answer__text { color: var(--ink); font-size: 14px; }
.answer__text p { margin: 8px 0; }
.answer__note {
    margin-top: 12px;
    font-size: 13px;
    color: var(--ink-2);
    background: var(--surface-2);
    border-radius: 8px;
    padding: 10px 14px;
}
.instrument-card__price {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-top: 10px;
}
.instrument-card__value { font-size: 22px; font-weight: 700; color: var(--ink); letter-spacing: -0.01em; }
.instrument-card__change { font-size: 13px; font-weight: 600; }
.instrument-card__change.is-up { color: var(--accent-strong); }
.instrument-card__change.is-down { color: var(--danger); }
.instrument-card__facts { margin-top: 14px; }
.instrument-card__vm {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 10px;
    padding: 8px 12px;
    background: var(--surface-2);
    border-radius: 8px;
    font-size: 13px;
    color: var(--ink-2);
}
.instrument-card__vm b { font-size: 14px; font-weight: 700; }
.instrument-card__vm.is-up b { color: var(--accent-strong); }
.instrument-card__vm.is-down b { color: var(--danger); }
.instrument-card__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
}
.instrument-card__footer .card__link { margin-top: 0; }

.results-subhead {
    margin: 22px 0 6px;
    font-size: 11.5px;
    font-weight: 700;
    color: var(--ink-3);
    text-transform: uppercase;
    letter-spacing: .04em;
}

/* ---------- Status / empty ---------- */
.status {
    text-align: center; padding: 16px; border-radius: var(--radius-sm);
    background: var(--surface); border: 1px solid var(--line);
    color: var(--ink-2); font-size: 13.5px; margin-top: 26px;
}
.status.error { background: var(--danger-soft); border-color: transparent; color: var(--danger); }
.spinner {
    width: 15px; height: 15px; border: 2px solid var(--line-strong);
    border-top-color: var(--accent); border-radius: 50%;
    display: inline-block; vertical-align: middle; margin-right: 9px;
    animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg) } }
.empty { text-align: center; color: var(--ink-3); padding: 30px; font-size: 13.5px; }

/* ---------- Load more ---------- */
.load-more {
    margin: 16px auto 0;
    display: block;
    padding: 9px 20px;
    font-weight: 600;
}

/* ---------- Footer ---------- */
.footer {
    text-align: center;
    padding: 26px 22px 44px;
    color: var(--ink-3);
    font-size: 12px;
    border-top: 1px solid var(--line);
    max-width: 800px;
    margin: 0 auto;
}

/* ---------- Calculator ---------- */
.calc {
    display: grid;
    grid-template-columns: minmax(300px, 1.3fr) minmax(260px, 0.9fr);
    gap: 20px;
    align-items: start;
    text-align: left;
    margin-top: 8px;
}
.calc__side { display: flex; flex-direction: column; gap: 12px; }
.calc__panel,
.calc__side > * {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
}
.calc__panel { padding: 18px; }

.calc__head { margin-bottom: 14px; }
.calc__head-row { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.calc__head h2 {
    font-size: 17px;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 4px;
    letter-spacing: -0.01em;
}
.calc__head p { font-size: 13px; color: var(--ink-3); }
.calc__clear-btn {
    flex-shrink: 0;
    background: none;
    border: none;
    color: var(--ink-3);
    font-size: 12px;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: color .15s ease, background .15s ease;
}
.calc__clear-btn:hover { color: var(--ink); background: var(--surface-2); }
.calc__note { font-size: 12px; color: var(--ink-2); line-height: 1.5; margin-top: 8px; }

.calc__ticker { margin-bottom: 16px; position: relative; }
.calc__ticker-row { display: flex; gap: 8px; margin-top: 6px; flex-wrap: nowrap; }
.calc__ticker-row input { flex: 1 1 auto; min-width: 0; }
.calc__ticker-row .ghost-btn { white-space: nowrap; }
.calc__loaded { display: block; margin-top: 8px; font-size: 12px; color: var(--ink-3); }

.calc__grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 12px; align-items: start; }
.calc__field { display: flex; flex-direction: column; gap: 4px; }
.calc__field:last-child { grid-column: 1 / -1; }
.calc__label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.04em;
    color: var(--ink);
    text-transform: uppercase;
    line-height: 1.35;
    min-height: 2.7em;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.calc__hint { font-size: 10.5px; color: var(--ink-3); line-height: 1.4; }
.calc__opt { color: var(--ink-3); font-weight: 500; text-transform: none; }

.calc input, .calc select {
    font: inherit;
    padding: 9px 11px;
    border: 1px solid var(--line-strong);
    border-radius: 8px;
    background: var(--surface);
    color: var(--ink);
    width: 100%;
    min-height: 38px;
    font-size: 13px;
    transition: border-color .15s ease, box-shadow .15s ease;
}
.calc input:hover, .calc select:hover { border-color: var(--ink-3); }
.calc input:focus, .calc select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}
.calc select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%235a6b63' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 30px;
}
html[data-theme='dark'] .calc select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23a7bab0' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
}

.calc__placeholder {
    color: var(--ink-2);
    font-size: 13px;
    padding: 22px;
    text-align: center;
    background: var(--surface-2);
    border: 1px dashed var(--line-strong);
    border-radius: var(--radius);
}
.calc__placeholder--block {
    text-align: left;
    border: 1px solid var(--line);
    border-left: 3px solid var(--danger);
    background: var(--surface);
}
.calc__placeholder--block p { margin-bottom: 10px; }
.calc__placeholder--block p:last-of-type { margin-bottom: 14px; }
.calc__placeholder-actions {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px 16px;
}
.calc__note--warning {
    color: var(--danger);
    background: var(--danger-soft);
    border-radius: 8px;
    padding: 8px 12px;
    margin: 0 0 12px;
}

.calc__vm {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 20px 22px;
    border-radius: var(--radius);
    border: 1px solid var(--line);
    border-left: 3px solid var(--line-strong);
    background: var(--surface);
}
.calc__vm--pos { border-left-color: var(--accent); }
.calc__vm--neg { border-left-color: var(--danger); }
.calc__vm-label {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--ink-3);
}
.calc__vm-value { font-size: 30px; font-weight: 700; letter-spacing: -.02em; word-break: break-word; overflow-wrap: anywhere; }
.calc__vm--pos .calc__vm-value { color: var(--accent-strong); }
.calc__vm--neg .calc__vm-value { color: var(--danger); }
.calc__vm-sub { font-size: 12.5px; color: var(--ink-3); }

.calc__breakdown {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 16px;
    padding: 10px;
    color: var(--ink);
}
.calc__breakdown div {
    background: var(--surface-2);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 0;
}
.calc__breakdown span {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--ink-3);
}
.calc__breakdown b { font-size: 13px; color: var(--ink); font-weight: 700; word-break: break-word; overflow-wrap: anywhere; }

.calc__formula-dynamic,
.calc__explain { border-radius: var(--radius); padding: 16px; }
.calc__formula-dynamic {
    background: var(--surface);
    border: 1px solid var(--line);
    margin-top: 14px;
}
.calc__formula-dynamic h4 {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--ink);
    margin-bottom: 10px;
}
.calc__explain { background: var(--surface); border: 1px solid var(--line); }
.calc__explain summary {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--ink);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    list-style: none;
}
.calc__explain summary::-webkit-details-marker { display: none; }
.calc__explain summary::after {
    content: "▾";
    font-size: 14px;
    color: var(--ink-3);
    transition: transform .15s ease;
}
.calc__explain[open] summary::after { transform: rotate(180deg); }
.calc__explain[open] { padding-bottom: 18px; }
.calc__explain > *:not(summary) { margin-top: 14px; }

.calc__formula {
    font-size: 12.5px;
    font-weight: 600;
    color: var(--ink);
    background: var(--surface-2);
    padding: 12px 14px;
    border-radius: 8px;
    margin-bottom: 14px;
    line-height: 1.55;
}
.calc__formula-line {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 12px;
    color: var(--ink-2);
    line-height: 1.5;
    word-break: break-word;
}
.calc__formula-line:not(:last-child) { margin-bottom: 6px; }
.calc__formula-line b { color: var(--ink); font-weight: 700; }
.calc__explain ul { margin: 0 0 10px; padding-left: 18px; display: grid; gap: 6px; }
.calc__explain li { font-size: 13px; color: var(--ink-2); line-height: 1.5; }
.calc__explain li b { color: var(--ink); }

.calc__suggest {
    position: absolute;
    top: calc(100% + 5px);
    left: 0;
    right: 0;
    z-index: 20;
    background: var(--surface);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-sm);
    max-height: 200px;
    overflow-y: auto;
    list-style: none;
    padding: 5px;
    margin: 0;
    box-shadow: var(--shadow);
}
.calc__suggest li {
    padding: 9px 11px;
    cursor: pointer;
    border-radius: 7px;
    font-size: 13px;
    color: var(--ink);
    transition: background .12s ease;
}
.calc__suggest li:hover,
.calc__suggest li.active { background: var(--surface-2); color: var(--accent-strong); }

@media (max-width: 720px) {
    .topbar { padding: 10px 16px; }
    .tab { padding: 7px 12px; font-size: 12px; }
    .brand__name { display: none; }
    .theme-toggle { width: 34px; height: 34px; }
    .calc { grid-template-columns: 1fr; }
    .intro { padding-top: 34px; }
}

@media (max-width: 560px) {
    .wrap { padding: 0 16px 60px; }
    .intro h1 { font-size: 24px; }
    .search { padding: 4px 4px 4px 12px; }
    #search-btn { padding: 10px 16px; }
    .card { padding: 15px 16px; }
    .calc__vm-value { font-size: 26px; }
    .calc__grid { grid-template-columns: 1fr; }
    .calc__field:last-child { grid-column: 1; }
    .section-head { align-items: center; gap: 8px; }
    .mode-switcher { flex-direction: column; }
    .mode-card { padding: 10px 12px; }
    .mode-card__desc { display: none; }
}