/* ==========================================================================
   php-chatbot-assistant — product showcase page
   Design system: "self-hosted infrastructure" — ink-navy canvas, teal utility
   accent, violet secondary for the PageIndex retrieval path, mono for anything
   that is a label, a command or a token. Light "paper" zone for the install
   guide so the documentation half of the page reads as documentation.
   Scope: every rule is namespaced .pca-* (or scoped under .pca-*) so the shared
   site stylesheet keeps owning the navbar and nothing here leaks outward.
   ========================================================================== */

/* ==========================================================================
   1. TOKENS
   ========================================================================== */
:root {
    --pca-bg: #0a1020;              /* page canvas — ink navy            */
    --pca-bg-2: #0d1526;            /* alternating dark section          */
    --pca-surface: #121c33;         /* cards                             */
    --pca-surface-2: #17243f;       /* nested / hover surface            */
    --pca-line: rgba(148, 178, 226, 0.16);
    --pca-line-strong: rgba(148, 178, 226, 0.3);
    --pca-ink: #e8eef9;
    --pca-ink-soft: #a9b8cf;        /* 8.8:1 on --pca-bg                 */
    --pca-ink-mute: #93a4be;        /* 7.0:1 on --pca-bg                 */
    --pca-accent: #38d3c0;          /* teal — links, marks, RAG path     */
    --pca-accent-ink: #04211e;      /* text on a teal fill               */
    --pca-accent-soft: rgba(56, 211, 192, 0.12);
    --pca-violet: #a3b1ff;          /* PageIndex path                    */
    --pca-violet-soft: rgba(163, 177, 255, 0.12);
    --pca-paper: #f4f7fb;           /* install-guide zone                */
    --pca-paper-2: #e8eef6;
    --pca-paper-ink: #0e1730;
    --pca-paper-soft: #46566f;      /* 7.4:1 on --pca-paper              */
    --pca-code-bg: #0b1524;
    --pca-code-ink: #cfe3f5;
    --pca-radius: 14px;
    --pca-radius-sm: 9px;
    --pca-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* ==========================================================================
   2. PAGE SHELL
   ========================================================================== */
.pca-body {
    background: var(--pca-bg);
    color: var(--pca-ink);
}

.pca-sec {
    padding: 5.5rem 0;
    background: var(--pca-bg);
}

.pca-sec--alt { background: var(--pca-bg-2); }

.pca-sec--paper {
    background: var(--pca-paper);
    color: var(--pca-paper-ink);
}

.pca-sec--paper h2,
.pca-sec--paper h3,
.pca-sec--paper h4 { color: var(--pca-paper-ink); }

.pca-kicker {
    display: block;
    font-family: var(--pca-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--pca-accent);
    margin-bottom: 0.7rem;
}

.pca-sec--paper .pca-kicker { color: #0d6f63; }

.pca-h2 {
    font-size: clamp(1.6rem, 3vw, 2.15rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.18;
    color: var(--pca-ink);
}

.pca-lede {
    color: var(--pca-ink-soft);
    font-size: 1.03rem;
    line-height: 1.7;
    max-width: 66ch;
}

.pca-sec--paper .pca-lede { color: var(--pca-paper-soft); }

.pca-rule {
    border: 0;
    border-top: 1px solid var(--pca-line);
    opacity: 1;
    margin: 0;
}

/* Links inside this page never carry an underline */
.pca-body a { text-decoration: none; }
.pca-body a:hover,
.pca-body a:focus { text-decoration: none; }

/* ==========================================================================
   3. BUTTONS
   ========================================================================== */
.pca-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 48px;
    padding: 0.7rem 1.35rem;
    background: var(--pca-accent);
    color: var(--pca-accent-ink);
    border: 1px solid var(--pca-accent);
    border-radius: var(--pca-radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.2;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
}

.pca-btn:hover,
.pca-btn:focus-visible {
    background: #5fe0d0;
    border-color: #5fe0d0;
    color: var(--pca-accent-ink);
    transform: translateY(-1px);
}

.pca-btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 48px;
    padding: 0.7rem 1.35rem;
    background: transparent;
    color: var(--pca-ink);
    border: 1px solid var(--pca-line-strong);
    border-radius: var(--pca-radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1.2;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.pca-btn-ghost:hover,
.pca-btn-ghost:focus-visible {
    border-color: var(--pca-accent);
    color: var(--pca-accent);
    background: var(--pca-accent-soft);
}

/* Button variant for the light "paper" zone */
.pca-sec--paper .pca-btn {
    background: var(--pca-paper-ink);
    border-color: var(--pca-paper-ink);
    color: #ffffff;
}

.pca-sec--paper .pca-btn:hover,
.pca-sec--paper .pca-btn:focus-visible {
    background: #1c2c4e;
    border-color: #1c2c4e;
    color: #ffffff;
}

.pca-btn:focus-visible,
.pca-btn-ghost:focus-visible,
.pca-zoom:focus-visible,
.pca-copy:focus-visible,
.pca-code pre:focus-visible,
.pca-lb-btn:focus-visible {
    outline: 3px solid var(--pca-accent);
    outline-offset: 3px;
}

/* Scrollable code blocks are focusable (keyboard users must be able to scroll
   them), so they need the same visible ring as every other focus stop. */
.pca-code pre { border-radius: 6px; }

.pca-sec--paper .pca-btn:focus-visible { outline-color: var(--pca-paper-ink); }

/* ==========================================================================
   4. HERO
   ========================================================================== */
.pca-hero {
    position: relative;
    padding: 6.5rem 0 4.5rem;
    background:
        linear-gradient(180deg, #0c1426 0%, var(--pca-bg) 100%);
    border-bottom: 1px solid var(--pca-line);
    overflow: hidden;
}

/* Faint technical grid — depth without a coloured blob */
.pca-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(to right, rgba(148, 178, 226, 0.07) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(148, 178, 226, 0.07) 1px, transparent 1px);
    background-size: 68px 68px;
    -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
    mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
    pointer-events: none;
}

.pca-hero > .container { position: relative; }

.pca-hero h1 {
    font-size: clamp(2.05rem, 4.4vw, 3.1rem);
    font-weight: 700;
    letter-spacing: -0.035em;
    line-height: 1.08;
    color: var(--pca-ink);
    margin-bottom: 1rem;
}

.pca-hero h1 .pca-mono-part {
    font-family: var(--pca-mono);
    font-weight: 500;
    letter-spacing: -0.02em;
    font-size: 0.86em;
    color: var(--pca-accent);
}

.pca-hero .pca-sub {
    font-size: clamp(1rem, 1.6vw, 1.15rem);
    line-height: 1.65;
    color: var(--pca-ink-soft);
    max-width: 56ch;
}

/* Meta badges under the hero copy */
.pca-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
    padding: 0;
    margin: 1.6rem 0 0;
}

.pca-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.7rem;
    background: rgba(148, 178, 226, 0.08);
    border: 1px solid var(--pca-line);
    border-radius: 6px;
    font-family: var(--pca-mono);
    font-size: 0.76rem;
    letter-spacing: 0.02em;
    color: var(--pca-ink-soft);
}

.pca-badge i { color: var(--pca-accent); font-size: 0.9rem; }

/* ==========================================================================
   5. SCREENSHOT FRAME (browser chrome around a captured screen)
   ========================================================================== */
.pca-frame {
    background: var(--pca-surface);
    border: 1px solid var(--pca-line-strong);
    border-radius: var(--pca-radius);
    padding: 0.55rem;
    box-shadow: 0 30px 70px rgba(3, 8, 20, 0.6);
}

.pca-frame-bar {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.15rem 0.35rem 0.6rem;
}

.pca-frame-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--pca-line-strong);
    flex: none;
}

.pca-frame-url {
    flex: 1;
    min-width: 0;
    margin-left: 0.5rem;
    padding: 0.22rem 0.6rem;
    background: rgba(11, 21, 36, 0.75);
    border: 1px solid var(--pca-line);
    border-radius: 6px;
    font-family: var(--pca-mono);
    font-size: 0.7rem;
    color: var(--pca-ink-mute);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pca-frame img { display: block; width: 100%; height: auto; border-radius: 8px; }

/* ==========================================================================
   6. STAT STRIP
   ========================================================================== */
.pca-stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.5rem;
    padding: 2.4rem 0 0;
    margin: 0;
    list-style: none;
}

.pca-stat { border-left: 2px solid var(--pca-accent); padding-left: 1rem; }
.pca-stat .n {
    display: block;
    font-family: var(--pca-mono);
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--pca-ink);
    letter-spacing: -0.02em;
}
.pca-stat .l {
    display: block;
    font-size: 0.82rem;
    line-height: 1.45;
    color: var(--pca-ink-mute);
}

/* ==========================================================================
   7. FEATURE GRID
   ========================================================================== */
.pca-card {
    height: 100%;
    padding: 1.6rem;
    background: var(--pca-surface);
    border: 1px solid var(--pca-line);
    border-radius: var(--pca-radius);
}

.pca-card h3 {
    font-size: 1.05rem;
    font-weight: 650;
    margin-bottom: 0.5rem;
    color: var(--pca-ink);
}

.pca-card p { font-size: 0.92rem; line-height: 1.65; color: var(--pca-ink-soft); margin: 0; }

.pca-card .pca-ico {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    margin-bottom: 0.9rem;
    background: var(--pca-accent-soft);
    border: 1px solid rgba(56, 211, 192, 0.3);
    border-radius: 8px;
    color: var(--pca-accent);
    font-size: 1.1rem;
}

.pca-card--violet .pca-ico {
    background: var(--pca-violet-soft);
    border-color: rgba(163, 177, 255, 0.3);
    color: var(--pca-violet);
}

/* ==========================================================================
   8. RETRIEVAL STRATEGY COMPARISON
   ========================================================================== */
.pca-panel {
    height: 100%;
    padding: 1.7rem;
    background: var(--pca-surface);
    border: 1px solid var(--pca-line);
    border-top: 3px solid var(--pca-accent);
    border-radius: var(--pca-radius);
}

.pca-panel--violet { border-top-color: var(--pca-violet); }

.pca-panel .tag {
    display: inline-block;
    font-family: var(--pca-mono);
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--pca-accent);
    margin-bottom: 0.55rem;
}

.pca-panel--violet .tag { color: var(--pca-violet); }

.pca-panel h3 { font-size: 1.2rem; font-weight: 700; color: var(--pca-ink); margin-bottom: 0.6rem; }
.pca-panel p { font-size: 0.92rem; line-height: 1.65; color: var(--pca-ink-soft); }

.pca-panel ul { list-style: none; padding: 0; margin: 1rem 0 0; }
.pca-panel ul li {
    position: relative;
    padding-left: 1.4rem;
    margin-bottom: 0.45rem;
    font-size: 0.9rem;
    color: var(--pca-ink-soft);
}
.pca-panel ul li::before {
    content: "\F272"; /* bootstrap-icons check2 */
    font-family: "bootstrap-icons";
    position: absolute;
    left: 0;
    top: 0;
    color: var(--pca-accent);
    font-size: 0.85rem;
}
.pca-panel--violet ul li::before { color: var(--pca-violet); }

/* Flow diagram — real markup, no decorative vector art */
.pca-flow {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1.3rem;
    background: rgba(11, 21, 36, 0.6);
    border: 1px solid var(--pca-line);
    border-radius: var(--pca-radius);
    font-family: var(--pca-mono);
    font-size: 0.78rem;
    color: var(--pca-ink-soft);
}

.pca-flow .node {
    padding: 0.35rem 0.7rem;
    background: var(--pca-surface-2);
    border: 1px solid var(--pca-line);
    border-radius: 6px;
    white-space: nowrap;
}

.pca-flow .arrow { color: var(--pca-ink-mute); }
.pca-flow .node--teal { border-color: rgba(56, 211, 192, 0.45); color: var(--pca-accent); }
.pca-flow .node--violet { border-color: rgba(163, 177, 255, 0.45); color: var(--pca-violet); }

/* ==========================================================================
   9. CODE / TERMINAL
   ========================================================================== */
.pca-code {
    position: relative;
    background: var(--pca-code-bg);
    border: 1px solid var(--pca-line);
    border-radius: var(--pca-radius);
    padding: 1.2rem 1.3rem;
}

.pca-code pre {
    margin: 0;
    font-family: var(--pca-mono);
    font-size: 0.8rem;
    line-height: 1.7;
    color: var(--pca-code-ink);
    white-space: pre;
    overflow-x: auto;
}

.pca-code .c-cap {
    display: block;
    font-family: var(--pca-mono);
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--pca-ink-mute);
    margin-bottom: 0.7rem;
}

.pca-sec--paper .pca-code .c-cap { color: #a9b7c9; }

.pca-code .tok { color: #7fd3ff; }
.pca-code .str { color: #ffd08a; }
.pca-code .cmt { color: #8296b0; }
.pca-code .kw { color: #ff9ecb; }

.pca-copy {
    position: absolute;
    top: 0.9rem;
    right: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    min-height: 44px;
    padding: 0.45rem 0.8rem;
    background: var(--pca-surface-2);
    color: var(--pca-ink-soft);
    border: 1px solid var(--pca-line-strong);
    border-radius: 6px;
    font-family: var(--pca-mono);
    font-size: 0.72rem;
    cursor: pointer;
}

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

/* ==========================================================================
   10. GALLERY
   ========================================================================== */
.pca-group + .pca-group { margin-top: 3.2rem; }

.pca-group-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.75rem;
    padding-bottom: 0.6rem;
    margin-bottom: 1.3rem;
    border-bottom: 1px solid var(--pca-line);
}

.pca-group-head h3 { font-size: 1.12rem; font-weight: 650; margin: 0; color: var(--pca-ink); }

.pca-group-head .n {
    font-family: var(--pca-mono);
    font-size: 0.74rem;
    color: var(--pca-ink-mute);
}

.pca-shots {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.2rem;
}

.pca-zoom {
    display: block;
    width: 100%;
    padding: 0.4rem;
    background: var(--pca-surface);
    border: 1px solid var(--pca-line);
    border-radius: var(--pca-radius);
    cursor: zoom-in;
    text-align: left;
    transition: border-color 0.2s ease, transform 0.2s ease;
}

.pca-zoom:hover { border-color: var(--pca-accent); transform: translateY(-2px); }

.pca-zoom img {
    display: block;
    width: 100%;
    /* height:auto is load-bearing: the markup carries width/height attributes for
       layout stability, and that presentational height would otherwise override
       aspect-ratio, stretching the shot and letting object-fit crop it. */
    height: auto;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    object-position: top center;
    border-radius: 8px;
    background: #0b1524;
}

/* The login capture is portrait — letterbox it inside the same 16:9 box so the
   row stays even; it is readable full size in the lightbox. */
.pca-zoom--tall img { object-fit: contain; }

.pca-zoom .cap {
    display: block;
    padding: 0.75rem 0.35rem 0.35rem;
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--pca-ink-soft);
}

.pca-zoom .cap strong { color: var(--pca-ink); font-weight: 600; }

/* ==========================================================================
   11. LIGHTBOX
   ========================================================================== */
.pca-lb {
    position: fixed;
    inset: 0;
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3.5rem 1rem;
    background: rgba(4, 8, 18, 0.94);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
}

.pca-lb.open { opacity: 1; visibility: visible; }

.pca-lb img {
    max-width: 92vw;
    max-height: 78vh;
    width: auto;
    height: auto;
    border: 1px solid var(--pca-line-strong);
    border-radius: 10px;
    background: #0b1524;
}

.pca-lb .cap {
    position: absolute;
    left: 50%;
    bottom: 1.6rem;
    transform: translateX(-50%);
    max-width: min(760px, 90vw);
    text-align: center;
    font-size: 0.88rem;
    line-height: 1.5;
    color: #dce6f5;
}

.pca-lb-btn {
    position: absolute;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: rgba(23, 36, 63, 0.9);
    border: 1px solid var(--pca-line-strong);
    border-radius: 50%;
    color: var(--pca-ink);
    font-size: 1.15rem;
    cursor: pointer;
}

.pca-lb-btn:hover { background: var(--pca-surface-2); color: var(--pca-accent); }
.pca-lb-close { top: 1.2rem; right: 1.2rem; }
.pca-lb-prev { left: 1.2rem; top: 50%; transform: translateY(-50%); }
.pca-lb-next { right: 1.2rem; top: 50%; transform: translateY(-50%); }

/* ==========================================================================
   12. INSTALL GUIDE (paper zone)
   ========================================================================== */
.pca-reqs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    list-style: none;
    padding: 0;
    margin: 1.4rem 0 0;
}

.pca-reqs li {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.4rem 0.75rem;
    background: #ffffff;
    border: 1px solid #cfdcec;
    border-radius: 6px;
    font-family: var(--pca-mono);
    font-size: 0.78rem;
    color: var(--pca-paper-ink);
}

.pca-reqs i { color: #0d6f63; }

.pca-steps { list-style: none; padding: 0; margin: 0; counter-reset: pca-step; }

.pca-steps > li {
    position: relative;
    counter-increment: pca-step;
    padding: 0 0 1.5rem 3.1rem;
    border-left: 1px solid #cfdcec;
    margin-left: 1rem;
}

.pca-steps > li:last-child { border-left-color: transparent; padding-bottom: 0; }

.pca-steps > li::before {
    content: counter(pca-step);
    position: absolute;
    left: -1rem;
    top: 0;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--pca-paper-ink);
    color: #ffffff;
    border-radius: 50%;
    font-family: var(--pca-mono);
    font-size: 0.82rem;
}

.pca-steps h3 {
    font-size: 1rem;
    font-weight: 650;
    margin: 0.3rem 0 0.45rem;
    color: var(--pca-paper-ink);
}

.pca-steps p { font-size: 0.92rem; line-height: 1.65; color: var(--pca-paper-soft); margin: 0 0 0.7rem; }

.pca-steps .pca-code { background: var(--pca-code-bg); }

.pca-note {
    display: flex;
    gap: 0.7rem;
    padding: 1rem 1.1rem;
    background: #fff6e6;
    border: 1px solid #e6c98a;
    border-left: 4px solid #b8791a;
    border-radius: var(--pca-radius-sm);
    font-size: 0.9rem;
    line-height: 1.6;
    color: #4a3410;
}

.pca-note i { color: #b8791a; font-size: 1.05rem; line-height: 1.5; }

/* ==========================================================================
   13. TECH STACK TABLE + GUARDRAILS
   ========================================================================== */
.pca-table-wrap {
    border: 1px solid var(--pca-line);
    border-radius: var(--pca-radius);
    overflow: hidden;
}

.pca-table {
    width: 100%;
    margin: 0;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.pca-table caption {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.pca-table th,
.pca-table td {
    padding: 0.8rem 1rem;
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid var(--pca-line);
}

.pca-table thead th {
    background: var(--pca-surface-2);
    font-family: var(--pca-mono);
    font-size: 0.74rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--pca-ink-mute);
    font-weight: 500;
}

.pca-table tbody th {
    font-weight: 600;
    color: var(--pca-ink);
    white-space: nowrap;
}

.pca-table td { color: var(--pca-ink-soft); }
.pca-table tbody tr:last-child th,
.pca-table tbody tr:last-child td { border-bottom: 0; }

.pca-list { list-style: none; padding: 0; margin: 0; }

.pca-list li {
    position: relative;
    padding: 0.55rem 0 0.55rem 1.7rem;
    font-size: 0.92rem;
    line-height: 1.6;
    color: var(--pca-ink-soft);
    border-bottom: 1px solid var(--pca-line);
}

.pca-list li:last-child { border-bottom: 0; }

.pca-list li::before {
    content: "\F272";
    font-family: "bootstrap-icons";
    position: absolute;
    left: 0;
    top: 0.6rem;
    color: var(--pca-accent);
    font-size: 0.9rem;
}

.pca-list strong { color: var(--pca-ink); font-weight: 600; }

/* ==========================================================================
   14. FAQ — native details/summary, no JS
   ========================================================================== */
.pca-faq { border-top: 1px solid var(--pca-line); }

.pca-faq details {
    border-bottom: 1px solid var(--pca-line);
}

.pca-faq summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.1rem 0.2rem;
    font-size: 1.02rem;
    font-weight: 600;
    color: var(--pca-ink);
    cursor: pointer;
    list-style: none;
}

.pca-faq summary::-webkit-details-marker { display: none; }

.pca-faq summary::after {
    content: "\F64D"; /* bootstrap-icons plus-lg */
    font-family: "bootstrap-icons";
    color: var(--pca-accent);
    font-size: 0.95rem;
    transition: transform 0.2s ease;
}

.pca-faq details[open] summary::after { content: "\F63B"; /* dash-lg */ }

.pca-faq summary:focus-visible { outline: 3px solid var(--pca-accent); outline-offset: 3px; }

.pca-faq .a {
    padding: 0 0.2rem 1.2rem;
    font-size: 0.94rem;
    line-height: 1.75;
    color: var(--pca-ink-soft);
    max-width: 82ch;
}

.pca-faq .a a { color: var(--pca-accent); }
.pca-faq .a a:hover { color: #5fe0d0; }

/* ==========================================================================
   15. CLOSING BAND + FOOTER
   ========================================================================== */
.pca-close {
    padding: 4.5rem 0;
    background: linear-gradient(135deg, #12243f 0%, #0a1020 100%);
    border-top: 1px solid var(--pca-line);
}

.pca-footer {
    padding: 1.6rem 0;
    background: #080d1a;
    border-top: 1px solid var(--pca-line);
    font-size: 0.86rem;
    color: var(--pca-ink-mute);
}

.pca-footer a { color: var(--pca-accent); }
.pca-footer a:hover { color: #5fe0d0; }

/* ==========================================================================
   16. INLINE CODE + COPY STATUS
   Bootstrap's default inline code colour is a pink that fails AA on both the
   dark canvas and the paper zone, so both are set explicitly here.
   ========================================================================== */
.pca-body code {
    padding: 0.12em 0.4em;
    background: var(--pca-accent-soft);
    border-radius: 4px;
    font-family: var(--pca-mono);
    font-size: 0.86em;
    color: #7fe6d8;
}

.pca-sec--paper code {
    background: #e2edf4;
    color: #0b5f55;
}

.pca-copy-status {
    min-height: 1.3rem;
    margin: 0.6rem 0 0;
    font-family: var(--pca-mono);
    font-size: 0.76rem;
    color: var(--pca-accent);
}

/* The shared consent banner is a translucent glass panel tuned for the site's
   white pages. Over this dark canvas the glass darkens and its orange link
   drops to 4.38:1, so on this page the panel is made opaque. The banner's own
   styles are injected at runtime by assets/js/main.js, hence the !important. */
#cookie-consent-banner {
    background: #ffffff !important;
}

/* ==========================================================================
   17. RESPONSIVE
   ========================================================================== */
@media (max-width: 991.98px) {
    .pca-sec { padding: 3.6rem 0; }
    .pca-hero { padding: 5rem 0 3rem; }
    .pca-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.2rem; }
    .pca-shots { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 767.98px) {
    .pca-code pre { font-size: 0.74rem; }
    .pca-lb { padding: 3.2rem 0.5rem; }
    .pca-lb img { max-height: 70vh; }
    .pca-lb-prev { left: 0.4rem; }
    .pca-lb-next { right: 0.4rem; }
    .pca-lb .cap { bottom: 0.8rem; font-size: 0.82rem; }
}

@media (max-width: 575.98px) {
    .pca-stats { grid-template-columns: minmax(0, 1fr); }
    .pca-shots { grid-template-columns: minmax(0, 1fr); }
    .pca-frame { padding: 0.4rem; }
    .pca-steps > li { padding-left: 2.6rem; }
}

/* Motion preferences */
@media (prefers-reduced-motion: reduce) {
    .pca-btn,
    .pca-btn-ghost,
    .pca-zoom,
    .pca-lb,
    .pca-faq summary::after {
        transition: none;
    }
    .pca-btn:hover,
    .pca-zoom:hover { transform: none; }
}