/* Venturis method index — matches credits / editorial surfaces */
.algo-page {
    --algo-bg: #f3eadc;
    --algo-surface: rgba(250, 244, 234, 0.88);
    --algo-line: rgba(46, 34, 22, 0.14);
    --algo-line-strong: rgba(46, 34, 22, 0.3);
    --algo-ink: #1f1912;
    --algo-muted: rgba(31, 25, 18, 0.68);
    --algo-brass: #9a6a22;
    --algo-brass-soft: rgba(154, 106, 34, 0.1);
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, rgba(154, 106, 34, 0.14), transparent 36%),
        linear-gradient(180deg, #f7f0e4 0%, var(--algo-bg) 100%);
    color: var(--algo-ink);
}

.algo-page::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: linear-gradient(rgba(46, 34, 22, 0.035) 1px, transparent 1px);
    background-size: 100% 34px;
    pointer-events: none;
    opacity: 0.3;
}

.algo-nav,
.algo-hero,
.algo-toolbar,
.algo-main,
.algo-foot {
    position: relative;
    z-index: 1;
}

.algo-nav {
    width: min(1180px, calc(100% - 2.6rem));
    margin: 0 auto;
    padding: 1.2rem 0 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.algo-brand,
.algo-nav-links a {
    color: var(--algo-ink);
    text-decoration: none;
}

.algo-brand {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.algo-nav-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.2rem;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.algo-nav-links a {
    padding-bottom: 0.12rem;
    border-bottom: 1px solid transparent;
    transition: border-color 180ms ease, color 180ms ease;
}

.algo-nav-links a:hover,
.algo-nav-links a:focus-visible {
    color: var(--algo-brass);
    border-color: rgba(154, 106, 34, 0.45);
}

.algo-hero {
    width: min(1180px, calc(100% - 2.6rem));
    margin: 0 auto;
    padding: 4.2rem 0 2.4rem;
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(16rem, 22rem);
    gap: 2rem;
    align-items: end;
}

@media (max-width: 820px) {
    .algo-hero {
        grid-template-columns: 1fr;
        padding-top: 3rem;
    }
}

.algo-kicker {
    display: inline-block;
    margin-bottom: 1rem;
    color: var(--algo-brass);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.32em;
    text-transform: uppercase;
}

.algo-hero-copy h1 {
    max-width: 11ch;
    margin-bottom: 1rem;
    font-family: var(--font-display);
    font-size: clamp(2.6rem, 6vw, 4.6rem);
    font-weight: 700;
    letter-spacing: -0.055em;
    line-height: 0.96;
}

.algo-hero-copy p,
.algo-intro-panel p {
    color: var(--algo-muted);
    font-size: 1.02rem;
    line-height: 1.7;
}

.algo-hero-copy p {
    max-width: 38rem;
}

.algo-hero-copy code {
    font-family: var(--font-mono);
    font-size: 0.88em;
    color: var(--algo-ink);
}

.algo-intro-panel {
    padding: 1.35rem 1.4rem 1.45rem;
    border: 1px solid var(--algo-line-strong);
    background: linear-gradient(180deg, rgba(255, 251, 245, 0.92) 0%, rgba(244, 235, 221, 0.8) 100%);
    box-shadow: 0 18px 44px rgba(53, 39, 24, 0.07);
}

.algo-facts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(7rem, 1fr));
    gap: 0.65rem;
    margin-top: 1rem;
}

.algo-fact {
    padding: 0.72rem 0.8rem 0.78rem;
    border: 1px solid rgba(154, 106, 34, 0.18);
    background: rgba(154, 106, 34, 0.06);
}

.algo-fact-label {
    display: block;
    margin-bottom: 0.28rem;
    color: rgba(31, 25, 18, 0.62);
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.algo-fact-value {
    color: var(--algo-ink);
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.algo-toolbar {
    width: min(1180px, calc(100% - 2.6rem));
    margin: 0 auto 1.4rem;
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 1.4rem 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--algo-line-strong);
}

.algo-search-wrap {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    min-width: min(100%, 18rem);
    flex: 1 1 18rem;
}

.algo-search-label {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--algo-brass);
}

.algo-search {
    width: 100%;
    padding: 0.72rem 0.85rem;
    border: 1px solid var(--algo-line-strong);
    border-radius: 0;
    background: rgba(255, 251, 245, 0.9);
    color: var(--algo-ink);
    font-family: var(--font);
    font-size: 0.95rem;
    outline: none;
}

.algo-search:focus {
    border-color: var(--algo-brass);
    box-shadow: 0 0 0 2px rgba(154, 106, 34, 0.12);
}

.algo-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem 1.1rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.algo-filter {
    padding: 0;
    border: none;
    background: none;
    color: var(--algo-muted);
    cursor: pointer;
    border-bottom: 1px solid transparent;
    transition: color 180ms ease, border-color 180ms ease;
}

.algo-filter:hover,
.algo-filter.is-active {
    color: var(--algo-ink);
    border-color: rgba(154, 106, 34, 0.55);
}

.algo-main {
    width: min(1180px, calc(100% - 2.6rem));
    margin: 0 auto;
    padding-bottom: 4.5rem;
    border-top: 1px solid var(--algo-line-strong);
}

.algo-section {
    padding: 1.6rem 0 2.1rem;
    border-bottom: 1px solid var(--algo-line);
}

.algo-section-header {
    display: grid;
    grid-template-columns: minmax(11rem, 15rem) minmax(0, 1fr);
    gap: 1.25rem 2rem;
    align-items: start;
}

@media (max-width: 720px) {
    .algo-section-header {
        grid-template-columns: 1fr;
    }
}

.algo-section-title {
    margin: 0;
    color: var(--algo-ink);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
}

.algo-section-count {
    display: block;
    margin-top: 0.35rem;
    color: var(--algo-muted);
    font-family: var(--font);
    font-size: 0.82rem;
    letter-spacing: 0;
    text-transform: none;
    font-weight: 400;
}

.algo-list {
    display: grid;
    gap: 1rem;
}

.algo-entry {
    padding: 1.15rem 1.2rem 1.2rem;
    border: 1px solid var(--algo-line);
    background: var(--algo-surface);
}

.algo-entry-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.55rem;
}

.algo-entry h3 {
    margin: 0;
    font-family: var(--font-display);
    font-size: clamp(1.1rem, 2vw, 1.35rem);
    font-weight: 600;
    letter-spacing: -0.025em;
    line-height: 1.12;
}

.algo-entry-state {
    flex-shrink: 0;
    color: var(--algo-brass);
    font-family: var(--font-mono);
    font-size: 0.6rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.algo-entry-state--experimental {
    color: rgba(31, 25, 18, 0.5);
}

.algo-entry-summary {
    margin: 0 0 0.85rem;
    color: var(--algo-muted);
    font-size: 0.95rem;
    line-height: 1.65;
}

.algo-entry-formula {
    margin: 0 0 0.85rem;
    padding: 0.7rem 0.8rem;
    border: 1px solid var(--algo-line);
    background: rgba(242, 238, 231, 0.9);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    line-height: 1.55;
    color: var(--algo-ink);
    word-break: break-word;
}

.algo-entry-io {
    margin: 0 0 0.55rem;
    color: var(--algo-muted);
    font-size: 0.95rem;
    line-height: 1.65;
}

.algo-entry-io strong {
    color: var(--algo-ink);
}

.algo-entry-files {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem 0.65rem;
}

.algo-file {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--algo-ink);
    border-bottom: 1px solid rgba(154, 106, 34, 0.28);
}

.algo-empty {
    padding: 2.5rem 0;
    color: var(--algo-muted);
    font-size: 0.95rem;
}

.algo-foot {
    width: min(1180px, calc(100% - 2.6rem));
    margin: 0 auto;
    padding: 1.4rem 0 2.5rem;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.75rem;
    border-top: 1px solid var(--algo-line);
    color: var(--algo-muted);
    font-size: 0.88rem;
}

.algo-foot a {
    color: var(--algo-ink);
    text-decoration: none;
    border-bottom: 1px solid rgba(154, 106, 34, 0.28);
}

.algo-foot a:hover {
    color: var(--algo-brass);
    border-color: rgba(154, 106, 34, 0.6);
}