/* ==========================================================================
   architecture.css — öffentliche Seite /Admin/Architecture 
   ========================================================================== */

.arch-page {
    --mono-font: 'JetBrains Mono', monospace;
    padding-top: var(--space-8, 64px);
    padding-bottom: 0;
}

.arch-page .container {
    max-width: 1200px;
}

.arch-page .text-col {
    max-width: 70ch;
}

/* ---- Breadcrumb ---- */
.arch-breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-2, 8px);
    font-size: .85rem;
    color: var(--text-muted);
    margin-bottom: var(--space-6, 40px);
}

    .arch-breadcrumb a {
        color: var(--text-muted);
        text-decoration: none;
        transition: color var(--motion-fast, 200ms) var(--ease-out, ease);
    }

        .arch-breadcrumb a:hover {
            color: var(--accent);
        }

    .arch-breadcrumb .sep {
        opacity: .5;
    }

    .arch-breadcrumb .current {
        color: var(--text);
    }

/* ---- Section rhythm ---- */
.arch-section {
    padding: clamp(64px, 9vw, 112px) 0;
    border-top: 1px solid var(--border);
    position: relative;
}

    .arch-section:first-of-type {
        border-top: none;
        padding-top: 0;
    }

.arch-section-head {
    margin-bottom: var(--space-7, 48px);
}

.arch-section-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--mono-font);
    font-size: .78rem;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: var(--space-3, 12px);
}

    .arch-section-eyebrow::before {
        content: '';
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background: var(--accent);
        box-shadow: 0 0 10px var(--accent-glow, rgba(183, 117, 255, .5));
    }

.arch-section-title {
    font-family: var(--heading-font, "Bebas Neue", serif);
    font-size: clamp(1.9rem, 4vw, 2.75rem);
    color: var(--text);
    letter-spacing: .01em;
    margin-bottom: var(--space-3, 12px);
}

    .arch-section-title .dot {
        color: var(--accent);
    }

.arch-section-sub {
    color: var(--text-muted);
    font-size: .98rem;
    max-width: 62ch;
}

/* ---- Hero ---- */
.arch-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: var(--space-8, 64px);
    align-items: center;
}

.arch-hero-title {
    font-family: var(--heading-font, "Bebas Neue", serif);
    font-size: clamp(2.75rem, 6.5vw, 5rem);
    line-height: .98;
    letter-spacing: .01em;
    text-transform: uppercase;
    color: var(--text);
    margin-bottom: var(--space-4, 20px);
}

    .arch-hero-title .dot {
        color: var(--accent);
    }

.arch-hero-intro {
    color: var(--text-muted);
    font-size: 1.02rem;
    line-height: 1.7;
    max-width: 64ch;
}

/* ---- Hero illustration: 4 floating stacked plates ---- */
.arch-hero-illustration {
    position: relative;
    height: 340px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.arch-plate {
    position: relative;
    width: 82%;
    padding: 14px 20px;
    margin: -8px 0;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(183, 117, 255, .14), rgba(139, 92, 246, .05));
    border: 1px solid var(--purple-line, rgba(183, 117, 255, .28));
    backdrop-filter: blur(2px);
    font-family: var(--mono-font);
    font-size: .74rem;
    color: var(--text-muted);
    text-align: center;
    letter-spacing: .04em;
    animation: archPlateFloat 6s ease-in-out infinite;
    transform-origin: center;
}

    .arch-plate:nth-child(1) { animation-delay: 0s; z-index: 4; }
    .arch-plate:nth-child(2) { animation-delay: .35s; z-index: 3; opacity: .92; }
    .arch-plate:nth-child(3) { animation-delay: .7s; z-index: 2; opacity: .84; }
    .arch-plate:nth-child(4) { animation-delay: 1.05s; z-index: 1; opacity: .76; }

@keyframes archPlateFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

.arch-hero-illustration .arch-glow-line {
    position: absolute;
    top: 10%;
    bottom: 10%;
    left: 50%;
    width: 2px;
    background: linear-gradient(to bottom, transparent, var(--accent), transparent);
    opacity: .5;
    animation: archGlowPulse 3s ease-in-out infinite;
}

@keyframes archGlowPulse {
    0%, 100% { opacity: .25; }
    50% { opacity: .65; }
}

/* ---- Repo card ---- */
.arch-repo-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4, 20px);
    padding: 18px 22px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-card, 16px);
    margin-top: var(--space-6, 40px);
    text-decoration: none !important;
    color: inherit;
    transition: border-color var(--motion-base, 300ms) var(--ease-out, ease), transform var(--motion-base, 300ms) var(--ease-out, ease);
}

    .arch-repo-card:hover {
        border-color: var(--accent);
        transform: translateY(-2px);
    }

.arch-repo-name {
    font-family: var(--mono-font);
    font-size: .92rem;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

    .arch-repo-name .owner {
        color: var(--text-muted);
    }

.arch-repo-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-family: var(--mono-font);
    font-size: .76rem;
    color: var(--text-muted);
    flex-wrap: wrap;
}

    .arch-repo-meta .lang-dot {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: var(--accent);
        display: inline-block;
        margin-right: 5px;
    }

.arch-repo-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: .82rem;
    font-weight: 600;
    color: var(--accent);
    white-space: nowrap;
}

/* ---- KPI row ---- */
.arch-kpi-row {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-5, 24px);
    margin-top: var(--space-7, 48px);
}

.arch-kpi {
    text-align: center;
    padding: var(--space-5, 24px) var(--space-3, 12px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-card, 16px);
}

.arch-kpi-value {
    font-family: var(--heading-font, "Bebas Neue", serif);
    font-size: 2.6rem;
    color: var(--accent);
    line-height: 1;
}

.arch-kpi-label {
    display: block;
    margin-top: 8px;
    font-family: var(--mono-font);
    font-size: .72rem;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--text-muted);
}

@media (max-width: 900px) {
    .arch-hero-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .arch-hero-illustration {
        height: 220px;
        order: -1;
    }

    .arch-kpi-row {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

/* ---- Tech stack ---- */
.arch-tech-groups {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr));
    gap: var(--space-5, 24px);
}

.arch-tech-group-title {
    font-family: var(--mono-font);
    font-size: .74rem;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: var(--space-3, 12px);
}

.arch-tech-cards {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.arch-tech-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    position: relative;
    cursor: default;
    transition: border-color var(--motion-fast, 200ms) var(--ease-out, ease);
}

    .arch-tech-card:hover {
        border-color: var(--accent);
    }

    .arch-tech-card i {
        font-size: 1.3rem;
        color: var(--accent);
        flex-shrink: 0;
        width: 24px;
        text-align: center;
    }

.arch-tech-card-name {
    font-size: .9rem;
    color: var(--text);
    font-weight: 500;
}

.arch-tech-card-tooltip {
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: calc(100% + 8px);
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: .78rem;
    color: var(--text-muted);
    opacity: 0;
    visibility: hidden;
    transform: translateY(4px);
    transition: opacity var(--motion-fast, 200ms) var(--ease-out, ease), transform var(--motion-fast, 200ms) var(--ease-out, ease);
    z-index: 5;
    pointer-events: none;
}

.arch-tech-card:hover .arch-tech-card-tooltip,
.arch-tech-card:focus-within .arch-tech-card-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* ---- Layer diagram (centerpiece) ---- */
.arch-layers-grid {
    display: grid;
    grid-template-columns: minmax(0, 360px) minmax(0, 1fr);
    gap: var(--space-7, 48px);
    align-items: start;
}

.arch-layer-diagram {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
}

.arch-layer-btn {
    display: block;
    width: 100%;
    text-align: left;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 18px;
    cursor: pointer;
    color: inherit;
    font: inherit;
    transition: border-color var(--motion-fast, 200ms) var(--ease-out, ease), background var(--motion-fast, 200ms) var(--ease-out, ease), transform var(--motion-fast, 200ms) var(--ease-out, ease);
}

    .arch-layer-btn:hover {
        border-color: var(--accent);
    }

    .arch-layer-btn.is-active {
        background: linear-gradient(135deg, rgba(183, 117, 255, .12), rgba(139, 92, 246, .04));
        border-color: var(--accent);
        box-shadow: 0 0 0 1px var(--accent), 0 12px 32px rgba(183, 117, 255, .15);
    }

.arch-layer-btn-head {
    display: flex;
    align-items: center;
    gap: 12px;
}

.arch-layer-idx {
    font-family: var(--mono-font);
    font-size: .68rem;
    font-weight: 700;
    width: 26px;
    height: 26px;
    border-radius: 7px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(183, 117, 255, .12);
    color: var(--accent);
    flex: none;
}

.arch-layer-name {
    font-family: var(--heading-font, "Bebas Neue", serif);
    font-size: 1.2rem;
    letter-spacing: .01em;
    color: var(--text);
}

    .arch-layer-name small {
        font-family: var(--mono-font);
        font-size: .72rem;   /* vorher .64rem (~10px) - zu klein zum Lesen */
        color: var(--text-muted);
        font-weight: 400;
        margin-left: 8px;
        text-transform: none;
        letter-spacing: 0;
    }

.arch-layer-arrow {
    text-align: center;
    color: var(--text-muted);
    font-family: var(--mono-font);
    font-size: .85rem;
    padding: 6px 0;
    opacity: .6;
}

.arch-layer-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-card, 16px);
    padding: var(--space-6, 40px);
    min-height: 340px;
    min-width: 0;
}

    /* lange Code-Zeilen im Panel scrollen innerhalb des Kastens */
    .arch-layer-panel pre {
        max-width: 100%;
        overflow-x: auto;
    }

@media (max-width: 575.98px) {
    .arch-layer-panel {
        padding: var(--space-4, 16px);
    }
}

.arch-layer-panel-title {
    font-family: var(--heading-font, "Bebas Neue", serif);
    font-size: 1.6rem;
    color: var(--text);
    margin-bottom: var(--space-3, 12px);
}

.arch-layer-panel-desc {
    color: var(--text-muted);
    font-size: .95rem;
    line-height: 1.65;
    margin-bottom: var(--space-5, 24px);
    max-width: 60ch;
}

.arch-chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: var(--space-5, 24px);
}

.arch-chip {
    font-family: var(--mono-font);
    font-size: .74rem;
    background: rgba(255, 255, 255, .03);
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 5px 11px;
    border-radius: 6px;
}

.arch-layer-deps {
    font-family: var(--mono-font);
    font-size: .78rem;
    color: var(--text-muted);
    margin-bottom: var(--space-5, 24px);
}

    .arch-layer-deps strong {
        color: var(--accent);
        font-weight: 600;
    }

.arch-layer-snippet {
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    background: #0a0a10;
}

    .arch-layer-snippet .arch-snippet-path {
        font-family: var(--mono-font);
        font-size: .72rem;
        color: var(--text-muted);
        padding: 10px 14px;
        border-bottom: 1px solid var(--border);
        background: var(--surface-2);
    }

    .arch-layer-snippet pre {
        margin: 0;
        padding: 16px 18px;
        font-family: var(--mono-font);
        font-size: .78rem;
        line-height: 1.6;
        overflow-x: auto;
    }

/* Mobile: the diagram list stacks above a single shared detail panel
   (no side-by-side layout) - simpler than a per-button accordion, but
   gives the same result: tap a layer, its detail appears right below
   the list. JS swaps the panel's content on click at every breakpoint. */
@media (max-width: 900px) {
    .arch-layers-grid {
        /* minmax(0,1fr) statt 1fr: sonst wird die Spalte so breit wie der
           längste Inhalt (Code-Zeilen im Panel) -> Seite ragt auf dem Handy
           rechts über den Bildschirm hinaus */
        grid-template-columns: minmax(0, 1fr);
    }

    .arch-layer-panel {
        margin-top: var(--space-5, 24px);
    }
}

/* ---- Request lifecycle flow ---- */
.arch-flow-replay {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-family: var(--mono-font);
    font-size: .78rem;
    padding: 8px 16px;
    border-radius: var(--radius-pill, 999px);
    cursor: pointer;
    margin-bottom: var(--space-6, 40px);
    transition: border-color var(--motion-fast, 200ms) var(--ease-out, ease), color var(--motion-fast, 200ms) var(--ease-out, ease);
}

    .arch-flow-replay:hover {
        border-color: var(--accent);
        color: var(--accent);
    }

.arch-flow-example {
    font-family: var(--mono-font);
    font-size: .82rem;
    color: var(--accent);
    background: rgba(183, 117, 255, .08);
    border: 1px solid var(--purple-line, rgba(183, 117, 255, .25));
    padding: 8px 14px;
    border-radius: 8px;
    display: inline-block;
    margin-bottom: var(--space-6, 40px);
    margin-left: 12px;
}

.arch-flow-track {
    position: relative;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 6px;
    padding-top: 26px;
}

    .arch-flow-track::before {
        content: '';
        position: absolute;
        top: 5px;
        left: 4%;
        right: 4%;
        height: 2px;
        background: var(--border);
    }

.arch-flow-packet {
    position: absolute;
    top: 1px;
    left: 4%;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow, rgba(183, 117, 255, .7));
    opacity: 0;
}

.arch-flow-packet.is-running {
    opacity: 1;
    animation: archFlowMove 3.2s linear;
}

@keyframes archFlowMove {
    0% { left: 4%; opacity: 1; }
    95% { opacity: 1; }
    100% { left: 94%; opacity: 0; }
}

.arch-flow-step {
    position: relative;
    flex: 1 1 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background: none;
    border: none;
    color: inherit;
    font: inherit;
    cursor: pointer;
    padding: 0 4px;
}

.arch-flow-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--surface-2);
    border: 2px solid var(--border);
    margin-bottom: 12px;
    transition: border-color var(--motion-fast, 200ms) var(--ease-out, ease), background var(--motion-fast, 200ms) var(--ease-out, ease);
}

.arch-flow-step:hover .arch-flow-dot,
.arch-flow-step.is-active .arch-flow-dot {
    border-color: var(--accent);
    background: var(--accent);
}

.arch-flow-step-label {
    font-family: var(--mono-font);
    font-size: .74rem;
    color: var(--text);
    font-weight: 600;
    margin-bottom: 4px;
}

.arch-flow-step-sub {
    font-size: .72rem;
    color: var(--text-muted);
    max-width: 15ch;
}

.arch-flow-tooltip {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(4px);
    width: 200px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 10px 12px;
    font-size: .76rem;
    color: var(--text-muted);
    text-align: left;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--motion-fast, 200ms) var(--ease-out, ease), transform var(--motion-fast, 200ms) var(--ease-out, ease);
    z-index: 6;
    pointer-events: none;
}

.arch-flow-step:last-of-type .arch-flow-tooltip {
    left: auto;
    right: 0;
    transform: translateY(4px);
}

.arch-flow-step:first-of-type .arch-flow-tooltip {
    left: 0;
    transform: translateY(4px);
}

.arch-flow-step:hover .arch-flow-tooltip,
.arch-flow-step:focus-visible .arch-flow-tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.arch-flow-step:first-of-type:hover .arch-flow-tooltip,
.arch-flow-step:first-of-type:focus-visible .arch-flow-tooltip,
.arch-flow-step:last-of-type:hover .arch-flow-tooltip,
.arch-flow-step:last-of-type:focus-visible .arch-flow-tooltip {
    transform: translateY(0);
}

@media (max-width: 900px) {
    .arch-flow-track {
        flex-direction: column;
        align-items: stretch;
        gap: 20px;
        padding-top: 0;
    }

        .arch-flow-track::before {
            top: 4%;
            bottom: 4%;
            left: 15px;
            right: auto;
            width: 2px;
            height: auto;
        }

    .arch-flow-packet {
        top: 4%;
        left: 11px;
    }

        .arch-flow-packet.is-running {
            animation: archFlowMoveVertical 3.2s linear;
        }

    @keyframes archFlowMoveVertical {
        0% { top: 4%; opacity: 1; }
        95% { opacity: 1; }
        100% { top: 94%; opacity: 0; }
    }

    .arch-flow-step {
        flex-direction: row;
        text-align: left;
        gap: 14px;
    }

    .arch-flow-dot {
        margin-bottom: 0;
        flex-shrink: 0;
    }

    .arch-flow-tooltip {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        width: auto;
        margin-top: 4px;
        display: none;
        background: none;
        border: none;
        padding: 0;
    }

    .arch-flow-step.is-active .arch-flow-tooltip {
        display: block;
    }
}

@media (prefers-reduced-motion: reduce) {
    .arch-plate,
    .arch-glow-line,
    .arch-flow-packet.is-running {
        animation: none !important;
    }
}

/* ---- Code samples (tabs) ---- */
.arch-code-window {
    border: 1px solid var(--border);
    border-radius: var(--radius-card, 16px);
    overflow: hidden;
    background: #0a0a10;
}

.arch-code-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 2px;
    padding: 10px 10px 0;
    background: var(--surface-2);
    border-bottom: 1px solid var(--border);
}

.arch-code-tab {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--mono-font);
    font-size: .78rem;
    padding: 10px 16px;
    border-radius: 8px 8px 0 0;
    cursor: pointer;
    transition: color var(--motion-fast, 200ms) var(--ease-out, ease), background var(--motion-fast, 200ms) var(--ease-out, ease);
}

    .arch-code-tab:hover {
        color: var(--text);
    }

    .arch-code-tab.is-active {
        color: var(--text);
        background: #0a0a10;
    }

.arch-code-toolbar {
    display: flex;
    flex-wrap: wrap;      /* schmale Handys: Pfad + Kopieren-Button umbrechen statt überstehen */
    gap: 8px;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
}

.arch-code-path {
    min-width: 0;
    overflow-wrap: anywhere;
    font-family: var(--mono-font);
    font-size: .72rem;
    color: var(--text-muted);
}

.arch-code-copy {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-family: var(--mono-font);
    font-size: .72rem;
    padding: 5px 11px;
    border-radius: 6px;
    cursor: pointer;
    transition: border-color var(--motion-fast, 200ms) var(--ease-out, ease), color var(--motion-fast, 200ms) var(--ease-out, ease);
}

    .arch-code-copy:hover {
        border-color: var(--accent);
        color: var(--accent);
    }

.arch-code-panel {
    display: none;
}

    .arch-code-panel.is-active {
        display: block;
    }

.arch-code-panel pre[class*="language-"] {
    margin: 0;
    background: #0a0a10 !important;
    font-size: .8rem;
    line-height: 1.65;
    max-height: 460px;
}

.arch-code-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(12px);
    background: var(--surface-2);
    border: 1px solid var(--accent);
    color: var(--text);
    font-size: .85rem;
    padding: 10px 20px;
    border-radius: var(--radius-pill, 999px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--motion-fast, 200ms) var(--ease-out, ease), transform var(--motion-fast, 200ms) var(--ease-out, ease);
    z-index: 80;
    max-width: calc(100vw - 32px);
    white-space: nowrap;
}

    .arch-code-toast.is-visible {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }

/* ---- Interactive file tree ---- */
.arch-tree-window {
    border: 1px solid var(--border);
    border-radius: var(--radius-card, 16px);
    overflow: hidden;
    background: #0a0a10;
}

.arch-tree-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: var(--surface-2);
    border-bottom: 1px solid var(--border);
}

    .arch-tree-bar span.dot {
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background: #302f42;
        display: inline-block;
    }

    .arch-tree-bar .path {
        margin-left: 8px;
        font-family: var(--mono-font);
        font-size: .72rem;
        color: var(--text-muted);
    }

.arch-tree {
    list-style: none;
    margin: 0;
    padding: 14px 8px;
    font-family: var(--mono-font);
    font-size: .82rem;
}

    .arch-tree ul {
        list-style: none;
        margin: 0;
        padding-left: 22px;
    }

    .arch-tree li {
        margin: 2px 0;
    }

.arch-tree-node {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font: inherit;
    text-align: left;
    padding: 6px 8px;
    border-radius: 6px;
    cursor: pointer;
}

    .arch-tree-node:hover {
        background: rgba(255, 255, 255, .04);
        color: var(--text);
    }

    .arch-tree-node .caret {
        width: 12px;
        color: var(--accent);
        transition: transform var(--motion-fast, 200ms) var(--ease-out, ease);
        flex-shrink: 0;
    }

    .arch-tree-node[aria-expanded="true"] .caret {
        transform: rotate(90deg);
    }

    .arch-tree-node i {
        color: var(--accent);
        width: 16px;
        text-align: center;
        flex-shrink: 0;
    }

    .arch-tree-node.is-file i {
        color: var(--text-faint, #6a6876);
    }

.arch-tree-desc {
    color: var(--text-faint, #6a6876);
    font-size: .74rem;
    margin-left: auto;
    padding-left: 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    opacity: 0;
    transition: opacity var(--motion-fast, 200ms) var(--ease-out, ease);
}

.arch-tree-node:hover .arch-tree-desc {
    opacity: 1;
}

.arch-tree > li > ul {
    overflow: hidden;
}

.arch-tree [data-tree-children][hidden] {
    display: none;
}

/* ---- Security / features grids ---- */
.arch-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(260px, 100%), 1fr));
    gap: var(--space-5, 24px);
}

.arch-info-card {
    padding: var(--space-5, 24px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-card, 16px);
}

    .arch-info-card i.card-icon {
        font-size: 1.4rem;
        color: var(--accent);
        margin-bottom: var(--space-3, 12px);
        display: block;
    }

.arch-info-card-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.arch-info-card-desc {
    font-size: .88rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 12px;
}

/* ---- Decisions / lessons / roadmap ---- */
.arch-decisions-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--space-7, 48px);
}

.arch-decisions-col-title {
    font-family: var(--mono-font);
    font-size: .78rem;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: var(--space-4, 20px);
}

.arch-decisions-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

    .arch-decisions-list li {
        padding-left: 22px;
        position: relative;
        color: var(--text-muted);
        font-size: .92rem;
        line-height: 1.6;
    }

        .arch-decisions-list li::before {
            content: '▸';
            position: absolute;
            left: 0;
            top: 0;
            color: var(--accent);
            font-size: .8rem;
        }

        .arch-decisions-list li strong {
            color: var(--text);
        }

@media (max-width: 820px) {
    .arch-decisions-grid {
        grid-template-columns: minmax(0, 1fr);
    }
}

.arch-roadmap {
    margin-top: var(--space-8, 64px);
    padding-top: var(--space-7, 48px);
    border-top: 1px dashed var(--border);
}

.arch-roadmap-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
}

.arch-roadmap-item {
    display: flex;
    align-items: center;
    gap: var(--space-4, 20px);
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}

    .arch-roadmap-item:last-child {
        border-bottom: none;
    }

.arch-roadmap-status {
    flex-shrink: 0;
    font-family: var(--mono-font);
    font-size: .68rem;
    text-transform: uppercase;
    letter-spacing: .05em;
    padding: 4px 11px;
    border-radius: var(--radius-pill, 999px);
    border: 1px solid var(--border);
    color: var(--text-muted);
    width: 96px;
    text-align: center;
}

.arch-roadmap-status.done {
    color: #4ade80;
    border-color: rgba(74, 222, 128, .4);
    background: rgba(74, 222, 128, .08);
}

.arch-roadmap-status.progress {
    color: var(--accent);
    border-color: var(--accent);
    background: rgba(183, 117, 255, .08);
}

.arch-roadmap-status.planned {
    color: var(--text-muted);
}

.arch-roadmap-text {
    font-size: .92rem;
    color: var(--text);
}

/* ---- CTA ---- */
.arch-cta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-5, 24px);
    padding: var(--space-7, 48px);
    border-radius: var(--radius-card, 16px);
    background: linear-gradient(135deg, rgba(183, 117, 255, .14), rgba(139, 92, 246, .06));
    border: 1px solid var(--purple-line, rgba(183, 117, 255, .28));
}

.arch-cta-title {
    font-family: var(--heading-font, "Bebas Neue", serif);
    font-size: 1.9rem;
    color: var(--text);
    margin-bottom: 6px;
}

.arch-cta-sub {
    color: var(--text-muted);
    font-size: .95rem;
}

.arch-cta-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.arch-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-pill, 999px);
    font-size: .9rem;
    font-weight: 600;
    text-decoration: none !important;
    transition: transform var(--motion-fast, 200ms) var(--ease-out, ease), opacity var(--motion-fast, 200ms) var(--ease-out, ease);
}

    .arch-btn:hover {
        transform: translateY(-2px);
    }

.arch-btn-primary {
    background: var(--accent);
    color: #0f0e10 !important;
}

.arch-btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text) !important;
}

    .arch-btn-outline:hover {
        border-color: var(--accent);
    }

/* ---- Sticky mini TOC (>=1280px) ---- */
.arch-layout {
    display: grid;
    /* minmax(0, 1fr) statt 1fr: sonst wird die Spalte so breit wie ihr
       breitester Inhalt (z. B. Code-/Kennzahlen-Zeilen) und die ganze
       Seite scrollt auf Tablet/Handy seitlich. */
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-8, 64px);
}

.arch-toc {
    display: none;
}

@media (min-width: 1280px) {
    .arch-layout {
        grid-template-columns: 200px minmax(0, 1fr);
        align-items: start;
    }

    .arch-toc {
        display: block;
        position: sticky;
        top: 110px;
        padding-top: var(--space-2, 8px);
    }

    .arch-toc-title {
        font-family: var(--mono-font);
        font-size: .7rem;
        letter-spacing: .08em;
        text-transform: uppercase;
        color: var(--text-muted);
        margin-bottom: var(--space-3, 12px);
    }

    .arch-toc-list {
        list-style: none;
        margin: 0;
        padding: 0;
        border-left: 1px solid var(--border);
    }

        .arch-toc-list li {
            margin: 0;
        }

        .arch-toc-list a {
            display: block;
            padding: 7px 0 7px 14px;
            margin-left: -1px;
            border-left: 1px solid transparent;
            font-size: .82rem;
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--motion-fast, 200ms) var(--ease-out, ease), border-color var(--motion-fast, 200ms) var(--ease-out, ease);
        }

            .arch-toc-list a:hover {
                color: var(--text);
            }

            .arch-toc-list a.is-active {
                color: var(--accent);
                border-left-color: var(--accent);
            }
}

/* ---- Divider ---- */
.arch-divider {
    height: 1px;
    background: linear-gradient(to right, transparent, var(--border), transparent);
    border: none;
    margin: 0;
}