/* =========================================================
   SERVERGUARD — SHARED COMPOSITION COMPONENTS
   Loaded by every page (landing + documentation) AFTER
   css/tokens.css and BEFORE the page-specific stylesheet.

   These are the reusable surface primitives that give the
   landing page and the documentation the same visual
   language: bordered panels, feature cards, icon tiles,
   chips, dark code panels and horizontal quick-start steps.
   Page-specific stylesheets only add layout that is unique
   to that page.
   ========================================================= */


/* =========================================================
   PANEL — bordered surface with a header
   ========================================================= */

.panel {
    position: relative;

    border: 1px solid var(--border);
    border-radius: var(--r-xl);

    background: var(--surface);

    overflow: hidden;
}

.panel::before {
    content: "";

    position: absolute;
    top: 0;
    left: 0;
    right: 0;

    height: 1px;

    background: linear-gradient(90deg, var(--accent-soft-strong), transparent 60%);
}

.panel-head {
    display: flex;
    align-items: flex-start;
    gap: var(--sp-4);

    padding: var(--sp-5) var(--sp-6);
}

.panel-head--divide {
    border-bottom: 1px solid var(--border);
}

.panel-head-text h2,
.panel-head-text h3 {
    margin-bottom: 4px;

    font-size: var(--fs-lg);
    font-weight: 650;
}

.panel-head-text p {
    max-width: 74ch;

    color: var(--text-secondary);
    font-size: var(--fs-sm);
    line-height: 1.6;
}

.panel-body {
    padding: var(--sp-5) var(--sp-6) var(--sp-6);
}

.panel-body--flush {
    padding: 0;
}

.panel-body--divide {
    padding-top: var(--sp-6);
    border-top: 1px solid var(--border);
}


/* =========================================================
   ICON TILE
   ========================================================= */

.panel-icon {
    display: grid;
    place-items: center;

    width: 38px;
    height: 38px;

    flex: none;

    border-radius: var(--r-md);

    background: var(--gradient-accent-soft);
    border: 1px solid var(--border-accent);
    color: var(--accent-text);
}

.panel-icon .icon {
    font-size: 19px;
}


/* =========================================================
   CHIP / META
   ========================================================= */

.chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;

    padding: 4px 10px;

    border-radius: var(--r-full);
    border: 1px solid var(--border);

    background: var(--surface-2);
    color: var(--text-secondary);

    font-family: var(--font-mono);
    font-size: 11px;
}

.chip .icon {
    font-size: 13px;
    color: var(--accent-text);
}

.chip code {
    color: var(--accent-text);
    font-size: 11px;
}

.meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-2);

    margin: 0;
    padding: 0;

    list-style: none;
}


/* =========================================================
   CODE PANEL — dark bordered block with a header + copy
   ========================================================= */

.code-panel {
    border: 1px solid var(--border-strong);
    border-radius: var(--r-lg);

    overflow: hidden;

    background: var(--bg-deep);
}

.code-panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-3);

    padding: 9px 14px;

    border-bottom: 1px solid var(--border);

    background: var(--surface-2);

    color: var(--text-muted);

    font-family: var(--font-mono);
    font-size: 11px;
}

.code-panel-head .path {
    overflow: hidden;

    color: var(--accent-text);
    text-overflow: ellipsis;
    white-space: nowrap;
}

.code-panel pre {
    position: relative;

    margin: 0;
    padding: var(--sp-5);

    overflow-x: auto;
}

.code-panel pre code {
    color: #c2cad9;
    font-size: 12.5px;
    line-height: 1.8;

    white-space: pre;
}


/* =========================================================
   FEATURE CARDS — two-column grid
   ========================================================= */

.feature-cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--sp-4);
}

.feature-card {
    padding: var(--sp-5);

    border: 1px solid var(--border);
    border-radius: var(--r-xl);

    background: var(--surface);

    transition: border-color var(--t), background var(--t);
}

.feature-card:hover {
    border-color: var(--border-accent);
    background: var(--surface-2);
}

.feature-card h3 {
    margin: 14px 0 6px;

    font-size: var(--fs-base);
    font-weight: 650;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: var(--fs-sm);
    line-height: 1.65;
}


/* =========================================================
   FEATURE PANEL — copy + code, two columns
   ========================================================= */

.feature-panel {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(24px, 3vw, 44px);
    align-items: center;

    padding: var(--sp-6);

    border: 1px solid var(--border);
    border-radius: var(--r-xl);

    background:
        radial-gradient(circle at 100% 0%, var(--accent-soft), transparent 50%),
        var(--surface);
}

.feature-panel h3 {
    margin-bottom: 12px;

    font-size: var(--fs-xl);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.feature-panel-copy > p {
    margin-bottom: 16px;

    color: var(--text-secondary);
    font-size: var(--fs-sm);
    line-height: 1.7;
}

.mini-list {
    display: grid;
    gap: 10px;

    margin: 0 0 16px;
    padding: 0;

    list-style: none;
}

.mini-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;

    color: var(--text-secondary);
    font-size: var(--fs-sm);
}

.mini-list .icon {
    margin-top: 3px;

    color: var(--accent-text);
    font-size: 15px;
}


/* =========================================================
   MODULE LINKS — grid of linked modules
   ========================================================= */

.module-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--sp-3);

    padding: 0 var(--sp-6) var(--sp-6);
}

.module-link {
    display: flex;
    flex-direction: column;
    gap: 8px;

    padding: var(--sp-4);

    border: 1px solid var(--border);
    border-radius: var(--r-lg);

    background: var(--surface);

    transition: border-color var(--t), background var(--t);
}

.module-link:hover {
    border-color: var(--border-accent);
    background: var(--surface-2);
}

.module-link .icon {
    font-size: 20px;
    color: var(--accent-text);
}

.module-link strong {
    font-size: var(--fs-base);
    font-weight: 650;
}

.module-link span {
    color: var(--text-secondary);
    font-size: var(--fs-sm);
    line-height: 1.6;
}

.module-link .module-link-go {
    margin-top: auto;
    padding-top: 10px;

    color: var(--text-faint);

    font-family: var(--font-mono);
    font-size: 11px;
}


/* =========================================================
   QUICK START — horizontal numbered steps
   ========================================================= */

.qs-steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--sp-4);

    margin-top: var(--sp-4);
}

.qs-step {
    padding: var(--sp-5);

    border: 1px solid var(--border);
    border-radius: var(--r-xl);

    background: var(--surface);
}

.qs-index {
    display: inline-grid;
    place-items: center;

    width: 34px;
    height: 34px;

    margin-bottom: 14px;

    border-radius: var(--r-md);
    border: 1px solid var(--border-accent);

    background: var(--gradient-accent-soft);
    color: var(--accent-text);

    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 700;
}

.qs-step h3 {
    margin-bottom: 6px;

    font-size: var(--fs-base);
    font-weight: 650;
}

.qs-step p {
    color: var(--text-secondary);
    font-size: var(--fs-sm);
    line-height: 1.6;
}

.qs-step a {
    color: var(--accent-text);
}


/* =========================================================
   FEATURE GRID — overview cards for real capabilities
   ========================================================= */

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--sp-4);
}

.feature-card--link {
    display: flex;
    flex-direction: column;

    color: inherit;
}

.feature-card--link .feature-card-go {
    margin-top: auto;
    padding-top: 14px;

    color: var(--accent-text);

    font-family: var(--font-mono);
    font-size: 11px;
}

.feature-card--link:hover .feature-card-go {
    text-decoration: underline;
}


/* =========================================================
   BADGE / STATUS LABEL
   ========================================================= */

.badge {
    display: inline-flex;
    align-items: center;
    gap: 7px;

    padding: 5px 11px;

    border-radius: var(--r-full);
    border: 1px solid var(--border-accent);

    background: var(--accent-soft);
    color: var(--text);

    font-size: var(--fs-xs);
    font-weight: 600;
    letter-spacing: 0.01em;
}

.badge .icon {
    font-size: 13px;
    color: var(--accent-text);
}

.badge .badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
}

.badge code {
    color: var(--accent-text);
    font-size: 11px;
}


/* =========================================================
   PIPELINE — "how it works" flow
   ========================================================= */

.pipeline {
    display: flex;
    align-items: stretch;
    gap: var(--sp-3);

    margin: 0;
    padding: 0;

    list-style: none;
}

.pipeline-node {
    flex: 1;

    display: flex;
    flex-direction: column;
    gap: 6px;

    padding: var(--sp-4);

    border: 1px solid var(--border);
    border-radius: var(--r-lg);

    background: var(--surface);
}

.pipeline-node .icon {
    font-size: 18px;
    color: var(--accent-text);
}

.pipeline-node strong {
    font-size: var(--fs-sm);
    font-weight: 650;
}

.pipeline-node span {
    color: var(--text-secondary);
    font-size: var(--fs-xs);
    line-height: 1.55;
}

.pipeline-arrow {
    display: grid;
    place-items: center;

    flex: none;

    padding: 0 2px;

    color: var(--text-faint);
    font-size: 14px;
}


/* =========================================================
   LAYER LIST — distinct security responsibilities
   ========================================================= */

.layer-list {
    display: grid;
    gap: 1px;

    margin: 0;
    padding: 0;

    list-style: none;

    border: 1px solid var(--border);
    border-radius: var(--r-lg);

    overflow: hidden;
}

.layer {
    display: grid;
    grid-template-columns: 20px minmax(0, 1fr) auto;
    align-items: center;
    gap: var(--sp-3);

    padding: 12px 14px;

    background: var(--surface);
}

.layer .icon {
    font-size: 16px;
    color: var(--accent-text);
}

.layer strong {
    display: block;
    font-size: var(--fs-sm);
    font-weight: 600;
}

.layer-desc {
    display: block;

    margin-top: 2px;

    color: var(--text-secondary);
    font-size: var(--fs-xs);
    line-height: 1.5;
}

.layer .layer-tag {
    padding: 2px 8px;

    border-radius: var(--r-full);
    border: 1px solid var(--border);

    color: var(--text-muted);

    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.layer .layer-tag--block { color: var(--danger); border-color: rgba(240, 115, 110, 0.35); }
.layer .layer-tag--harden { color: var(--warning); border-color: rgba(230, 180, 90, 0.35); }
.layer .layer-tag--monitor { color: var(--accent-text); border-color: var(--border-accent); }


/* =========================================================
   CODE FRAME — header + copy for article code blocks
   (added to documentation <pre> blocks at runtime)
   ========================================================= */

.code-frame {
    margin: var(--sp-5) 0;

    border: 1px solid var(--border-strong);
    border-radius: var(--r-lg);

    overflow: hidden;

    background: var(--bg-deep);
}

.code-frame-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-3);

    padding: 8px 12px;

    border-bottom: 1px solid var(--border);

    background: var(--surface-2);
}

.code-frame-label {
    overflow: hidden;

    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 11px;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.code-frame pre {
    margin: 0;
    padding: var(--sp-5);

    overflow-x: auto;

    border: 0;
    border-radius: 0;

    background: transparent;
}

.code-frame pre::before {
    display: none;
}

.code-frame .copy-btn,
.code-panel-head .copy-btn {
    position: static;
    top: auto;
    right: auto;

    flex: none;

    opacity: 1;
}


/* =========================================================
   RESPONSIVE
   ========================================================= */

@media (max-width: 900px) {

    .feature-panel {
        grid-template-columns: 1fr;
    }

    .qs-steps {
        grid-template-columns: 1fr;
    }

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

    .pipeline {
        flex-wrap: wrap;
    }

    .pipeline-node {
        flex: 1 1 40%;
    }

    .pipeline-arrow {
        display: none;
    }
}

@media (max-width: 620px) {

    .feature-cards {
        grid-template-columns: 1fr;
    }

    .feature-grid {
        grid-template-columns: 1fr;
    }

    .panel-head,
    .panel-body {
        padding-left: var(--sp-5);
        padding-right: var(--sp-5);
    }

    .module-links {
        padding-left: var(--sp-5);
        padding-right: var(--sp-5);
    }

    .layer {
        grid-template-columns: 20px minmax(0, 1fr);
    }

    .layer .layer-tag {
        display: none;
    }
}