:root {
    --bg: #f4f7fb;
    --surface: #ffffff;
    --surface-soft: #f8fafc;
    --sidebar: #0b3a6e;
    --sidebar-hover: #164d83;
    --primary: #0b5cab;
    --primary-hover: #084b8d;
    --primary-soft: #eaf3fc;
    --line: #dfe6ee;
    --line-strong: #cad5e1;
    --text: #172033;
    --muted: #667085;
    --green: #087a55;
    --green-soft: #eaf8f2;
    --red: #bd3342;
    --red-soft: #fff0f1;
    --amber: #9a6700;
    --amber-soft: #fff8e6;
    --radius: 10px;
    color-scheme: light;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body { margin: 0; min-width: 320px; background: var(--bg); color: var(--text); font-size: 16px; line-height: 1.5; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }

.app-shell { min-height: 100vh; display: grid; grid-template-columns: 244px minmax(0, 1fr); }
.sidebar { position: sticky; top: 0; height: 100vh; padding: 22px 14px 18px; background: var(--sidebar); color: #fff; display: flex; flex-direction: column; z-index: 30; }
.brand { display: flex; align-items: center; gap: 11px; min-height: 52px; padding: 0 12px 22px; font-size: 1.18rem; letter-spacing: -.01em; }
.brand small { margin-left: 5px; color: #8ed0ff; font-size: .72em; font-weight: 800; }
.brand-mark { width: 36px; height: 36px; flex: 0 0 36px; display: inline-grid; place-items: center; border: 1px solid rgba(255,255,255,.32); border-radius: 7px; background: #fff; color: var(--sidebar); font-weight: 900; }
.nav-link { display: flex; align-items: center; gap: 10px; min-height: 44px; margin: 2px 0; padding: 0 12px; border-radius: 7px; color: #d7e7f7; font-size: .9rem; transition: background-color .15s ease, color .15s ease; }
.nav-link:hover { background: var(--sidebar-hover); color: #fff; }
.nav-link.active { background: #fff; color: var(--sidebar); font-weight: 750; }
.nav-link em { margin-left: auto; color: #9fc0de; font-size: .68rem; font-style: normal; }
.nav-link.active em { color: #718aa3; }
.nav-link.muted { opacity: .68; }
.nav-icon { width: 20px; flex: 0 0 20px; text-align: center; font-size: 1.05rem; line-height: 1; }
.nav-label { margin: 24px 12px 8px; color: #8fb1d1; font-size: .7rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.sidebar-foot { margin-top: auto; padding-top: 18px; }
.ghost-button { width: 100%; min-height: 42px; border: 1px solid rgba(255,255,255,.28); border-radius: 7px; background: transparent; color: #e3eef8; }
.ghost-button:hover { background: rgba(255,255,255,.08); color: #fff; }

.workspace { min-width: 0; }
.topbar { min-height: 74px; padding: 13px clamp(22px, 3vw, 44px); display: flex; align-items: center; gap: 16px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.96); }
.topbar h1 { margin: 2px 0 0; color: var(--text); font-size: 1.3rem; letter-spacing: -.02em; }
.topbar-meta { margin-left: auto; color: var(--muted); font-size: .86rem; }
.status-dot { display: inline-block; width: 8px; height: 8px; margin-right: 7px; border-radius: 50%; background: var(--green); }
.menu-button { display: none; width: 42px; height: 42px; border: 1px solid var(--line-strong); border-radius: 7px; color: var(--primary); background: #fff; }
.content { width: 100%; max-width: 1560px; padding: 26px clamp(22px, 3vw, 44px) 56px; }
.eyebrow { margin: 0; color: var(--primary); font-size: .72rem; font-weight: 800; letter-spacing: .1em; }

.data-warning { margin-bottom: 18px; padding: 12px 14px; border: 1px solid #ecd28c; border-left: 4px solid #d29a14; border-radius: 7px; background: var(--amber-soft); display: flex; gap: 12px; color: #70541b; font-size: .88rem; }
.data-warning strong { color: var(--amber); white-space: nowrap; }
.data-warning.data-live { border-color: #a9ddc8; border-left-color: var(--green); background: var(--green-soft); color: #126044; }
.data-warning.data-live strong { color: var(--green); }
.market-hero { min-height: 188px; padding: clamp(24px, 3vw, 34px); border: 1px solid var(--line); border-left: 4px solid var(--primary); border-radius: var(--radius); display: flex; align-items: center; justify-content: space-between; gap: 30px; background: var(--surface); box-shadow: 0 3px 12px rgba(30, 58, 95, .05); }
.index-line { display: flex; align-items: baseline; flex-wrap: wrap; gap: 13px; margin: 14px 0; }
.index-line h2 { margin: 0; color: #334155; font-size: clamp(1.35rem, 2.4vw, 2rem); }
.index-line strong { color: #0f1f35; font-size: clamp(1.7rem, 3.5vw, 2.75rem); letter-spacing: -.04em; }
.index-line span { font-weight: 800; }
.regime-badge, .action-chip { display: inline-block; padding: 5px 9px; border: 1px solid #b9d6f2; border-radius: 6px; background: var(--primary-soft); color: var(--primary); font-size: .78rem; font-weight: 650; }
.decision-card { width: min(390px, 100%); padding: 18px 20px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface-soft); }
.decision-card span, .metric-card span { color: var(--muted); font-size: .82rem; }
.decision-card strong { display: block; margin: 7px 0; color: var(--primary); font-size: 1.08rem; }
.decision-card p { margin: 0; color: #536176; font-size: .89rem; line-height: 1.55; }

.metric-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; margin: 16px 0; }
.metric-card, .panel { border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); box-shadow: 0 2px 8px rgba(30, 58, 95, .035); }
.metric-card { min-height: 110px; padding: 17px 18px; }
.metric-card strong { display: block; margin: 7px 0 4px; color: #1d2939; font-size: 1.12rem; }
.metric-card small, .footnote { color: var(--muted); }
.panel { margin-top: 16px; overflow: hidden; }
.panel-head { padding: 20px 22px 15px; display: flex; justify-content: space-between; gap: 20px; align-items: flex-end; }
.panel-head h2, .form-panel h2 { margin: 4px 0 0; color: #1d2939; font-size: 1.15rem; }
.panel-head > span { color: var(--muted); font-size: .78rem; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 720px; }
th, td { padding: 14px 22px; border-top: 1px solid var(--line); text-align: left; font-size: .88rem; }
th { background: #f8fafc; color: #56657a; font-size: .72rem; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; }
tbody tr:hover { background: #f8fbff; }
.positive { color: var(--green) !important; }
.negative { color: var(--red) !important; }
.score { width: 78px; height: 5px; margin-bottom: 5px; overflow: hidden; border-radius: 4px; background: #dce5ef; }
.score span { display: block; height: 100%; background: var(--primary); }
.footnote { margin: 0; padding: 14px 22px; border-top: 1px solid var(--line); background: var(--surface-soft); font-size: .76rem; line-height: 1.5; }

.settings-grid { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(320px, .75fr); gap: 16px; align-items: start; }
.portfolio-grid { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(340px, .7fr); gap: 16px; align-items: start; }
.portfolio-grid .panel { margin-top: 0; }
.portfolio-tabs { display: flex; gap: 9px; margin-bottom: 16px; overflow-x: auto; }
.portfolio-tab { min-width: 160px; padding: 11px 14px; border: 1px solid var(--line); border-radius: 7px; background: var(--surface); color: var(--muted); }
.portfolio-tab.active { border-color: var(--primary); background: var(--primary-soft); color: var(--primary); font-weight: 700; }
.portfolio-tab small { display: block; margin-top: 3px; color: #718096; font-weight: 500; }
.block-meta { display: block; margin-top: 3px; color: var(--muted); font-size: .73rem; }
.empty-state { padding: 46px 24px; border: 1px dashed var(--line-strong); border-radius: var(--radius); background: var(--surface); text-align: center; color: var(--muted); }
.trade-form-panel { position: sticky; top: 90px; }
.form-divider { height: 1px; margin: 26px 0 20px; background: var(--line); }

.calculator-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(360px, .72fr); gap: 16px; align-items: stretch; }
.calculator-grid .panel { margin-top: 0; }
.calculator-result { padding: clamp(24px, 3vw, 36px); border: 1px solid #bfd5eb; border-top: 4px solid var(--primary); border-radius: var(--radius); background: var(--surface); box-shadow: 0 2px 8px rgba(30, 58, 95, .04); }
.quantity-result { display: block; margin: 14px 0 4px; color: var(--primary); font-size: clamp(2rem, 4vw, 3.2rem); letter-spacing: -.05em; }
.result-reason { color: var(--muted); }
.result-list { margin-top: 24px; }
.result-list > div { display: flex; justify-content: space-between; gap: 20px; padding: 13px 0; border-top: 1px solid var(--line); }
.result-list span { color: var(--muted); }
.result-warning { margin: 20px 0 0; }
.inline-notice { margin: 16px 0 0 !important; }
.three-col { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.settings-grid .panel { margin-top: 0; }
.universe-layout > aside { display: grid; gap: 16px; }
.universe-layout > aside .panel { margin-top: 0; }
.small-value { font-size: .92rem !important; }

.quality-summary { margin-bottom: 16px; }
.quality-hero { min-height: 150px; padding: 24px 26px; border: 1px solid var(--line); border-left: 4px solid var(--primary); border-radius: var(--radius); display: flex; align-items: center; justify-content: space-between; gap: 26px; background: var(--surface); box-shadow: 0 2px 8px rgba(30, 58, 95, .035); }
.quality-hero h2 { margin: 5px 0 4px; font-size: 1.65rem; letter-spacing: -.025em; }
.quality-hero p:not(.eyebrow) { max-width: 720px; margin: 0; color: var(--muted); }
.quality-hero form { flex: 0 0 auto; }
.quality-hero .primary-button { padding: 0 22px; }
.quality-hero.status-pass { border-left-color: var(--green); }
.quality-hero.status-pass h2 { color: var(--green); }
.quality-hero.status-warning { border-left-color: #d29a14; }
.quality-hero.status-warning h2 { color: var(--amber); }
.quality-hero.status-failed { border-left-color: var(--red); }
.quality-hero.status-failed h2 { color: var(--red); }
.quality-layout > aside { display: grid; gap: 16px; }
.quality-layout > aside .panel { margin-top: 0; }
.severity { display: inline-block; padding: 4px 8px; border-radius: 999px; font-size: .68rem; font-weight: 850; letter-spacing: .035em; }
.severity-warning { background: var(--amber-soft); color: var(--amber); }
.severity-critical { background: var(--red-soft); color: var(--red); }
.severity-info { background: var(--primary-soft); color: var(--primary); }
.text-danger { color: var(--red) !important; }
.text-success { color: var(--green) !important; }
.inline-alert { margin: 0 22px 16px; padding: 11px 13px; border-radius: 7px; font-size: .84rem; }
.inline-alert.danger { border: 1px solid #f0b8be; background: var(--red-soft); color: #922b36; }
.compact-steps { margin: 16px 0 0; padding-left: 22px; color: #465469; }
.compact-steps li { padding: 5px 0; }

.opportunity-hero { min-height: 168px; padding: 26px 28px; border: 1px solid #bed5eb; border-top: 4px solid var(--primary); border-radius: var(--radius); display: flex; align-items: center; justify-content: space-between; gap: 28px; background: linear-gradient(120deg, #fff 55%, #eef6fd); box-shadow: 0 3px 12px rgba(30, 58, 95, .05); }
.opportunity-hero h2 { margin: 5px 0 7px; color: #14243a; font-size: clamp(1.45rem, 2.5vw, 2rem); letter-spacing: -.03em; }
.opportunity-hero p:not(.eyebrow) { max-width: 780px; margin: 0; color: var(--muted); }
.opportunity-hero form { flex: 0 0 auto; }
.opportunity-hero .primary-button { padding: 0 24px; }
.filter-bar { margin: 16px 0; padding: 15px 18px; overflow: visible; }
.filter-bar form { display: flex; align-items: flex-end; flex-wrap: wrap; gap: 12px; }
.filter-bar label { min-width: 180px; display: grid; gap: 5px; color: #465469; font-size: .78rem; font-weight: 750; }
.filter-bar select { min-height: 40px; }
.secondary-button { min-height: 40px; padding: 0 18px; border: 1px solid var(--line-strong); border-radius: 7px; background: #fff; color: var(--primary); font-weight: 750; }
.secondary-button:hover { border-color: var(--primary); background: var(--primary-soft); }
.text-link { min-height: 40px; display: inline-flex; align-items: center; padding: 0 6px; color: var(--primary); font-size: .82rem; font-weight: 700; }
.opportunity-layout { grid-template-columns: minmax(0, 2.2fr) minmax(300px, .62fr); }
.opportunity-layout > aside { display: grid; gap: 16px; }
.opportunity-layout > aside .panel { margin-top: 0; }
.opportunity-table { min-width: 1080px; }
.opportunity-table th, .opportunity-table td { padding-left: 15px; padding-right: 15px; }
.rank-number { margin-right: 7px; color: var(--muted); font-size: .73rem; font-weight: 750; }
.symbol-name { color: #102a48; font-size: 1rem; }
.strategy-chip, .risk-chip { display: inline-block; padding: 4px 8px; border-radius: 999px; font-size: .7rem; font-weight: 800; }
.strategy-breakout { background: #e7f2ff; color: #075da8; }
.strategy-pullback { background: #e9f8f1; color: #087a55; }
.strategy-trend { background: #f0ecff; color: #6542aa; }
.strategy-base { background: #fff5df; color: #946200; }
.risk-low { background: var(--green-soft); color: var(--green); }
.risk-medium { background: var(--amber-soft); color: var(--amber); }
.risk-high { background: var(--red-soft); color: var(--red); }
.regime-bullish, .quality-pass { color: var(--green) !important; }
.regime-neutral, .quality-warning { color: var(--amber) !important; }
.regime-risk_off, .quality-failed { color: var(--red) !important; }
.reason-row td { padding-top: 0; background: #fbfcfe; }
.reason-row:hover { background: #fbfcfe; }
.reason-row details { color: var(--muted); font-size: .8rem; }
.reason-row summary { width: fit-content; padding: 8px 0 12px; color: var(--primary); cursor: pointer; font-weight: 700; }
.reason-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(250px, .6fr); gap: 18px; padding: 0 0 14px; }
.reason-grid ul { margin: 0; padding-left: 20px; }
.reason-grid li { margin: 4px 0; }
.candidate-warnings { padding: 10px 12px; border-left: 3px solid #d29a14; border-radius: 5px; background: var(--amber-soft); color: #70541b; }
.candidate-warnings ul { margin-top: 5px; }
.plain-list { margin: 15px 0 0; padding-left: 20px; color: #526176; font-size: .85rem; }
.plain-list li { margin: 7px 0; }
.safeguard-card { border-top: 3px solid #d29a14; }
.opportunity-error { margin: 16px 0 0; }

.backtest-hero { min-height: 160px; padding: 26px 28px; border: 1px solid var(--line); border-left: 4px solid var(--primary); border-radius: var(--radius); display: flex; align-items: center; justify-content: space-between; gap: 28px; background: linear-gradient(120deg, #fff 55%, #eef6fd); box-shadow: 0 3px 12px rgba(30, 58, 95, .05); }
.backtest-hero h2 { margin: 5px 0 7px; color: #14243a; font-size: clamp(1.45rem, 2.5vw, 2rem); letter-spacing: -.03em; }
.backtest-hero p:not(.eyebrow) { max-width: 780px; margin: 0; color: var(--muted); }
.backtest-hero form { flex: 0 0 auto; }
.backtest-hero .primary-button { padding: 0 24px; }
.backtest-hero.verdict-preliminary, .backtest-hero.verdict-insufficient { border-left-color: #d29a14; background: linear-gradient(120deg, #fff 55%, #fff8e6); }
.backtest-hero.verdict-preliminary h2, .backtest-hero.verdict-insufficient h2 { color: var(--amber); }
.backtest-hero.verdict-pass { border-left-color: var(--green); background: linear-gradient(120deg, #fff 55%, #eaf8f2); }
.backtest-hero.verdict-pass h2 { color: var(--green); }
.backtest-hero.verdict-reject { border-left-color: var(--red); background: linear-gradient(120deg, #fff 55%, #fff0f1); }
.backtest-hero.verdict-reject h2 { color: var(--red); }
.backtest-error { margin: 16px 0 0; }
.backtest-metrics { grid-template-columns: repeat(5, minmax(160px, 1fr)); }
.backtest-period { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 0 0 16px; padding: 17px 20px; gap: 18px; overflow: visible; }
.backtest-period div { min-width: 0; }
.backtest-period span { display: block; margin-bottom: 4px; color: var(--muted); font-size: .74rem; }
.backtest-period strong { display: block; color: #26364b; font-size: .86rem; overflow-wrap: anywhere; }
.backtest-layout { grid-template-columns: minmax(0, 2.15fr) minmax(310px, .65fr); }
.backtest-layout > div, .backtest-layout > aside { min-width: 0; }
.backtest-layout > aside { display: grid; gap: 16px; }
.backtest-layout > aside .panel { margin-top: 0; }
.backtest-layout > div > .panel:first-child { margin-top: 0; }
.backtest-filter { margin: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--surface-soft); }
.backtest-table { min-width: 1120px; }
.backtest-table th, .backtest-table td { padding-left: 15px; padding-right: 15px; vertical-align: top; }
.sample-chip { display: inline-block; padding: 4px 8px; border-radius: 999px; font-size: .68rem; font-weight: 800; white-space: nowrap; }
.sample-in_sample { background: var(--primary-soft); color: var(--primary); }
.sample-out_of_sample { background: #f0ecff; color: #6542aa; }
.limitation-card { border-top: 3px solid #d29a14; }

.form-panel { padding: 22px; }
.form-help { color: var(--muted); font-size: .85rem; line-height: 1.55; }
.form-help strong { color: var(--text); }
.stack-form { display: grid; gap: 14px; margin-top: 18px; }
.stack-form label { display: grid; gap: 6px; color: #465469; font-size: .84rem; font-weight: 700; }
input, select, textarea { width: 100%; min-height: 44px; padding: 0 12px; border: 1px solid var(--line-strong); border-radius: 7px; outline: none; background: #fff; color: var(--text); }
textarea { padding: 10px 12px; resize: vertical; line-height: 1.45; }
input:hover, select:hover, textarea:hover { border-color: #9eb0c4; }
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(11,92,171,.1); }
input::placeholder { color: #98a2b3; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.check-row { display: flex !important; grid-template-columns: auto 1fr; align-items: center; }
.check-row input { width: 18px; min-height: 18px; accent-color: var(--primary); }
.primary-button { min-height: 45px; border: 1px solid var(--primary); border-radius: 7px; background: var(--primary); color: #fff; font-weight: 800; }
.primary-button:hover { border-color: var(--primary-hover); background: var(--primary-hover); }
.form-panel .ghost-button { border-color: var(--line-strong); background: #fff; color: var(--primary); font-weight: 750; }
.form-panel .ghost-button:hover { border-color: var(--primary); background: var(--primary-soft); }

.notice { margin: 16px clamp(22px, 3vw, 44px) 0; padding: 12px 14px; border-radius: 7px; font-size: .9rem; }
.notice.success { border: 1px solid #a9ddc8; border-left: 4px solid var(--green); background: var(--green-soft); color: #126044; }
.notice.error { border: 1px solid #f0b8be; border-left: 4px solid var(--red); background: var(--red-soft); color: #922b36; }

.guest-body { min-height: 100vh; display: grid; place-items: center; padding: 22px; background: #eef3f8; }
.guest-shell { width: min(430px, 100%); }
.login-card { padding: clamp(28px, 6vw, 40px); border: 1px solid var(--line); border-top: 4px solid var(--primary); border-radius: 10px; background: #fff; box-shadow: 0 18px 50px rgba(30,58,95,.1); }
.login-brand { margin-bottom: 20px; }
.login-card h1 { margin: 7px 0 9px; color: #14243a; font-size: 1.9rem; letter-spacing: -.03em; }
.login-copy { color: var(--muted); line-height: 1.6; }
.login-card .notice { margin: 16px 0 0; }
.security-note { margin: 17px 0 0; text-align: center; color: #7b8798; font-size: .78rem; }

@media (max-width: 1050px) {
    .settings-grid, .portfolio-grid, .calculator-grid { grid-template-columns: 1fr; }
    .backtest-metrics { grid-template-columns: repeat(3, minmax(180px, 1fr)); }
    .trade-form-panel { position: static; }
}

@media (max-width: 760px) {
    .app-shell { display: block; }
    .sidebar { position: fixed; left: -264px; width: 244px; transition: left .2s ease; box-shadow: 18px 0 45px rgba(15, 35, 58, .2); }
    .sidebar.open { left: 0; }
    body.nav-open { overflow: hidden; }
    body.nav-open::after { content: ''; position: fixed; inset: 0; z-index: 20; background: rgba(15, 30, 48, .35); }
    .menu-button { display: block; }
    .topbar-meta { display: none; }
    .content { padding-top: 20px; }
    .market-hero { align-items: stretch; flex-direction: column; }
    .quality-hero { align-items: stretch; flex-direction: column; }
    .quality-hero form, .quality-hero .primary-button { width: 100%; }
    .opportunity-hero { align-items: stretch; flex-direction: column; }
    .opportunity-hero form, .opportunity-hero .primary-button { width: 100%; }
    .backtest-hero { align-items: stretch; flex-direction: column; }
    .backtest-hero form, .backtest-hero .primary-button { width: 100%; }
    .backtest-period { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .backtest-metrics { grid-template-columns: repeat(2, minmax(150px, 1fr)); }
    .decision-card { width: 100%; }
    .data-warning { flex-direction: column; gap: 3px; }
}

@media (max-width: 480px) {
    .metric-grid, .two-col, .three-col, .backtest-metrics, .backtest-period { grid-template-columns: 1fr; }
    .topbar { min-height: 68px; padding: 11px 16px; }
    .content { padding: 18px 16px 44px; }
    .notice { margin-left: 16px; margin-right: 16px; }
    .market-hero { padding: 20px; }
    .panel-head { align-items: flex-start; flex-direction: column; }
    .form-panel { padding: 19px 16px; }
    .reason-grid { grid-template-columns: 1fr; }
    th, td { padding-left: 16px; padding-right: 16px; }
}