/* ================================================================
   architecture.css  —  Architecture & Service Overview Page
   ================================================================ */

/* ────────────────────────────────────────────────────────────────
   Hero
   ──────────────────────────────────────────────────────────────── */
.arch-hero {
    padding-top: calc(var(--nav-h) + 80px);
    padding-bottom: 80px;
    text-align: center;
    background: linear-gradient(180deg, var(--ink) 0%, #2a2520 100%);
    color: var(--paper);
    position: relative;
    overflow: hidden;
}

.arch-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 40% at 50% 0%, rgba(139,58,42,0.18) 0%, transparent 70%);
    pointer-events: none;
}

.arch-hero-eyebrow {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent2);
    margin-bottom: 20px;
}

.arch-hero-title {
    font-family: 'EB Garamond', serif;
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    font-weight: 500;
    color: var(--paper);
    letter-spacing: -0.01em;
    line-height: 1.15;
    margin-bottom: 20px;
}

.arch-hero-title em {
    font-style: italic;
    color: var(--accent2);
}

.arch-hero-desc {
    font-size: 1.05rem;
    color: rgba(245,240,232,0.65);
    max-width: 600px;
    margin: 0 auto 36px;
    line-height: 1.8;
}

.arch-hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.arch-hero-actions .btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 10px 22px;
    border-radius: var(--r-md);
    font-size: 0.88rem;
    font-weight: 500;
    text-decoration: none;
    transition: all var(--t);
    cursor: pointer;
    border: none;
}

.arch-hero-actions .btn-primary {
    background: var(--accent);
    color: #fff;
}
.arch-hero-actions .btn-primary:hover { background: var(--accent2); }

.arch-hero-actions .btn-ghost {
    background: transparent;
    color: rgba(245,240,232,0.75);
    border: 1px solid rgba(245,240,232,0.25);
}
.arch-hero-actions .btn-ghost:hover {
    background: rgba(245,240,232,0.08);
    color: var(--paper);
    border-color: rgba(245,240,232,0.45);
}

/* ────────────────────────────────────────────────────────────────
   Wrapper
   ──────────────────────────────────────────────────────────────── */
.arch-wrap {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px;
}

/* ── Overview ── */
.arch-overview {
    padding: 64px 0 56px;
    border-bottom: 1px solid var(--border);
}
.arch-overview-highlights {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}
.arch-overview-highlight {
    padding: 28px 24px;
    background: rgba(26,23,20,0.02);
    border: 1px solid var(--border);
    border-radius: 10px;
    transition: box-shadow 0.3s, transform 0.3s;
}
.arch-overview-highlight:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    transform: translateY(-2px);
}
.arch-overview-highlight-icon {
    font-size: 1.6rem;
    display: block;
    margin-bottom: 14px;
}
.arch-overview-highlight p {
    font-size: 0.88rem;
    line-height: 1.75;
    color: var(--muted);
    margin: 0;
}
.arch-overview-highlight strong {
    color: var(--ink);
    font-weight: 600;
}
.arch-overview-questions {
    padding: 28px 32px;
    background: rgba(139,58,42,0.04);
    border-left: 3px solid var(--accent);
    border-radius: 0 8px 8px 0;
}
.arch-overview-questions-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 14px;
}
.arch-overview-questions ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.arch-overview-questions li {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--ink);
    padding-left: 24px;
    position: relative;
}
.arch-overview-questions li::before {
    content: '❓';
    position: absolute;
    left: 0;
    font-size: 0.82rem;
}

.arch-section {
    padding: 72px 0;
    border-bottom: 1px solid var(--border);
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}

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

.arch-section.visible {
    opacity: 1;
    transform: none;
}

/* ────────────────────────────────────────────────────────────────
   Section Heading (shared with profile.html pattern)
   ──────────────────────────────────────────────────────────────── */
.arch-section-heading {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
}

.arch-section-heading h2 {
    font-family: 'EB Garamond', serif;
    font-size: 1.7rem;
    font-weight: 500;
    color: var(--ink);
}

.arch-section-heading-icon {
    font-size: 1.4rem;
    line-height: 1;
}

.arch-section-heading-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    background: rgba(139,58,42,0.08);
    padding: 3px 8px;
    border-radius: var(--r-sm);
    border: 1px solid rgba(139,58,42,0.2);
    margin-left: auto;
}

.arch-section-lead {
    font-size: 0.97rem;
    color: var(--muted);
    line-height: 1.85;
    margin-bottom: 36px;
    max-width: 800px;
}

/* ────────────────────────────────────────────────────────────────
   Why Cards (Modular Monolith reasons)
   ──────────────────────────────────────────────────────────────── */
.arch-why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.arch-why-card {
    background: var(--cream);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 28px 24px;
    transition: box-shadow var(--t), border-color var(--t);
}

.arch-why-card:hover {
    box-shadow: 0 4px 16px rgba(26,23,20,0.08);
    border-color: rgba(139,58,42,0.3);
}

.arch-why-card-icon {
    font-size: 1.6rem;
    margin-bottom: 14px;
    display: block;
}

.arch-why-card h3 {
    font-family: 'EB Garamond', serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 8px;
}

.arch-why-card p {
    font-size: 0.875rem;
    color: var(--muted);
    line-height: 1.75;
}

/* ────────────────────────────────────────────────────────────────
   Architecture Diagram
   ──────────────────────────────────────────────────────────────── */
.arch-diagram-wrap {
    background: var(--cream);
    border: 2px dashed var(--border);
    border-radius: var(--r-lg);
    overflow: hidden;
    position: relative;
}

.arch-diagram-wrap img {
    width: 100%;
    height: auto;
    display: block;
}

.arch-diagram-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 40px;
    gap: 16px;
    text-align: center;
}

.arch-diagram-placeholder-icon {
    font-size: 3rem;
    opacity: 0.4;
}

.arch-diagram-placeholder p {
    font-size: 0.9rem;
    color: var(--muted);
    line-height: 1.7;
}

.arch-diagram-placeholder code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    background: rgba(0,0,0,0.06);
    padding: 2px 6px;
    border-radius: 3px;
    color: var(--accent);
}

/* ────────────────────────────────────────────────────────────────
   Module Structure
   ──────────────────────────────────────────────────────────────── */
.arch-modules-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 20px 0;
}

.arch-module-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    width: 100%;
}

.arch-module-row + .arch-module-row {
    margin-top: 0;
}

.arch-module-connector {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 32px;
    width: 100%;
    gap: 0;
}

.arch-connector-line {
    width: 2px;
    height: 32px;
    background: var(--border);
    flex-shrink: 0;
}

.arch-connector-branch {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    width: 100%;
    height: 32px;
    position: relative;
}

.arch-connector-branch::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 16px;
    background: var(--border);
}

.arch-connector-branch::after {
    content: '';
    position: absolute;
    top: 16px;
    left: 20%;
    right: 20%;
    height: 2px;
    background: var(--border);
}

/* Module Box */
.arch-mod {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 14px 20px;
    border-radius: var(--r-md);
    border: 1.5px solid var(--border);
    background: #fff;
    min-width: 130px;
    flex-shrink: 0;
    transition: border-color var(--t), box-shadow var(--t);
    position: relative;
}

.arch-mod:hover {
    border-color: var(--accent);
    box-shadow: 0 2px 12px rgba(139,58,42,0.12);
}

.arch-mod-name {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 4px;
}

.arch-mod-type {
    font-size: 0.7rem;
    color: var(--muted);
}

.arch-mod-badge {
    position: absolute;
    top: -8px;
    right: -8px;
    font-size: 0.6rem;
    font-family: 'JetBrains Mono', monospace;
    background: var(--accent);
    color: #fff;
    padding: 2px 5px;
    border-radius: var(--r-sm);
    letter-spacing: 0.04em;
}

/* Module type coloring */
.arch-mod.bootstrap { background: rgba(139,58,42,0.06); border-color: rgba(139,58,42,0.4); }
.arch-mod.presentation { background: rgba(196,106,62,0.05); border-color: rgba(196,106,62,0.35); }
.arch-mod.domain { background: rgba(26,23,20,0.03); }
.arch-mod.shared { background: var(--cream); border-color: var(--border); }
.arch-mod.worker { background: rgba(100,120,80,0.05); border-color: rgba(100,120,80,0.3); }
.arch-mod.devops { background: rgba(60,90,140,0.05); border-color: rgba(60,90,140,0.3); }

/* Module Legend */
.arch-mod-legend {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.arch-mod-legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.78rem;
    color: var(--muted);
}

.arch-mod-legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 2px;
    flex-shrink: 0;
}

/* Vertical connector dots */
.arch-v-connector {
    display: flex;
    justify-content: center;
    padding: 6px 0;
}

.arch-v-connector-line {
    width: 2px;
    height: 24px;
    background: var(--border);
}

/* Module table view for mobile / more readable */
.arch-module-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.arch-module-table th {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 10px 16px;
    text-align: left;
    border-bottom: 2px solid var(--border);
    background: var(--cream);
}

.arch-module-table td {
    padding: 13px 16px;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
    line-height: 1.6;
}

.arch-module-table tr:last-child td { border-bottom: none; }

.arch-module-table tr:hover td { background: rgba(139,58,42,0.03); }

.arch-module-table td:first-child {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--ink);
    white-space: nowrap;
}

.arch-module-table td:nth-child(2) {
    color: var(--muted);
    font-size: 0.8rem;
}

.arch-module-table td:nth-child(3) {
    color: var(--ink);
    opacity: 0.85;
}

/* Module type badges in table */
.arch-type-badge {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 2px 7px;
    border-radius: 3px;
    white-space: nowrap;
}

.arch-type-badge.bootstrap  { background: rgba(139,58,42,0.1); color: var(--accent); }
.arch-type-badge.presentation { background: rgba(196,106,62,0.1); color: var(--accent2); }
.arch-type-badge.domain { background: rgba(26,23,20,0.06); color: var(--muted); }
.arch-type-badge.infrastructure { background: rgba(80,100,60,0.1); color: #5a7040; }
.arch-type-badge.worker { background: rgba(100,120,80,0.1); color: #6a8050; }
.arch-type-badge.devops { background: rgba(60,90,140,0.1); color: #3a5a8c; }

/* ────────────────────────────────────────────────────────────────
   Key Features Grid
   ──────────────────────────────────────────────────────────────── */
.arch-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.arch-feature-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 26px 24px;
    transition: box-shadow var(--t), border-color var(--t), transform var(--t);
}

.arch-feature-card:hover {
    box-shadow: 0 4px 20px rgba(26,23,20,0.09);
    border-color: rgba(139,58,42,0.25);
    transform: translateY(-2px);
}

.arch-feature-card-header {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin-bottom: 14px;
}

.arch-feature-icon {
    font-size: 1.6rem;
    line-height: 1;
    flex-shrink: 0;
    margin-top: 2px;
}

.arch-feature-card h3 {
    font-family: 'EB Garamond', serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.3;
    margin-bottom: 4px;
}

.arch-feature-card-sub {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    color: var(--accent2);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.arch-feature-card p {
    font-size: 0.86rem;
    color: var(--muted);
    line-height: 1.75;
    margin-bottom: 14px;
}

.arch-feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.arch-feature-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    background: var(--cream);
    border: 1px solid var(--border);
    color: var(--muted);
    padding: 2px 8px;
    border-radius: var(--r-sm);
    letter-spacing: 0.03em;
}

/* ────────────────────────────────────────────────────────────────
   Observability Stack
   ──────────────────────────────────────────────────────────────── */
.arch-obs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}

.arch-obs-card {
    background: var(--ink);
    color: var(--paper);
    border-radius: var(--r-lg);
    padding: 24px 22px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: transform var(--t);
}

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

.arch-obs-card-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.arch-obs-card h3 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--paper);
}

.arch-obs-card p {
    font-size: 0.8rem;
    color: rgba(245,240,232,0.55);
    line-height: 1.65;
}

.arch-obs-card-role {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    color: var(--accent2);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-top: auto;
}

/* ────────────────────────────────────────────────────────────────
   Tech Stack Table
   ──────────────────────────────────────────────────────────────── */
.arch-stack-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.arch-stack-table thead th {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 10px 16px;
    text-align: left;
    background: var(--cream);
    border-bottom: 2px solid var(--border);
}

.arch-stack-table tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
    line-height: 1.6;
}

.arch-stack-table tbody tr:last-child td { border-bottom: none; }
.arch-stack-table tbody tr:hover td { background: rgba(139,58,42,0.03); }

.arch-stack-table td:first-child {
    font-weight: 600;
    font-size: 0.82rem;
    color: var(--ink);
    white-space: nowrap;
    width: 180px;
}

.arch-stack-table td:last-child {
    color: var(--muted);
}

/* ────────────────────────────────────────────────────────────────
   Deployment Info Banner
   ──────────────────────────────────────────────────────────────── */
.arch-deploy-banner {
    background: linear-gradient(135deg, var(--ink) 0%, #2e2822 100%);
    border-radius: var(--r-lg);
    padding: 36px 40px;
    display: flex;
    align-items: center;
    gap: 32px;
    flex-wrap: wrap;
}

.arch-deploy-banner-icon {
    font-size: 2.8rem;
    flex-shrink: 0;
}

.arch-deploy-banner-body { flex: 1; min-width: 200px; }

.arch-deploy-banner h3 {
    font-family: 'EB Garamond', serif;
    font-size: 1.4rem;
    color: var(--paper);
    margin-bottom: 8px;
}

.arch-deploy-banner p {
    font-size: 0.875rem;
    color: rgba(245,240,232,0.6);
    line-height: 1.75;
}

.arch-deploy-specs {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.arch-deploy-spec {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 100px;
}

.arch-deploy-spec-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent2);
}

.arch-deploy-spec-value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--paper);
    font-weight: 500;
}

/* ────────────────────────────────────────────────────────────────
   Performance Optimization
   ──────────────────────────────────────────────────────────────── */
.arch-perf-categories {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.arch-perf-category-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1.5px solid var(--border);
}

.arch-perf-category-title span {
    font-family: 'EB Garamond', serif;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--ink);
}

.arch-perf-category-title em {
    font-style: normal;
    font-size: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent2);
    background: rgba(196,106,62,0.08);
    padding: 2px 8px;
    border-radius: var(--r-sm);
}

.arch-perf-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.arch-perf-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    overflow: hidden;
    transition: box-shadow var(--t), transform var(--t);
}

.arch-perf-card:hover {
    box-shadow: 0 4px 18px rgba(26,23,20,0.08);
    transform: translateY(-2px);
}

.arch-perf-card-top {
    padding: 16px 18px 14px;
    border-bottom: 1px solid var(--border);
    background: var(--cream);
}

.arch-perf-card-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 6px;
}

.arch-perf-card-title {
    font-family: 'EB Garamond', serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.3;
}

.arch-perf-card-body {
    padding: 14px 18px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* Problem → Solution flow inside card */
.arch-perf-flow {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.arch-perf-flow-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 0.8rem;
    line-height: 1.55;
}

.arch-perf-flow-icon {
    flex-shrink: 0;
    font-size: 0.8rem;
    margin-top: 1px;
}

.arch-perf-flow-text {
    color: var(--muted);
}

.arch-perf-flow-text strong {
    color: var(--ink);
    font-weight: 600;
}

.arch-perf-arrow-row {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 2px 0;
}

.arch-perf-arrow-row svg {
    flex-shrink: 0;
    color: var(--border);
}

/* Effect badge */
.arch-perf-effect {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 4px;
    padding: 7px 10px;
    background: rgba(139,58,42,0.05);
    border: 1px solid rgba(139,58,42,0.15);
    border-radius: var(--r-md);
    font-size: 0.78rem;
    color: var(--ink);
    line-height: 1.5;
}

.arch-perf-effect-icon { font-size: 0.9rem; flex-shrink: 0; }

/* Code snippet inline */
.arch-perf-code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.76rem;
    background: var(--code-bg);
    color: #85e89d;
    padding: 8px 12px;
    border-radius: var(--r-md);
    line-height: 1.6;
    overflow-x: auto;
}

.arch-perf-code .kw  { color: #f97583; }   /* keyword */
.arch-perf-code .an  { color: #b392f0; }   /* annotation */
.arch-perf-code .cl  { color: #79b8ff; }   /* class name */
.arch-perf-code .st  { color: #9ecbff; }   /* string */
.arch-perf-code .cm  { color: #6a737d; }   /* comment */
.arch-perf-code .nm  { color: #ffea7f; }   /* number/value */

/* Tags at bottom */
.arch-perf-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 2px;
}

.arch-perf-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.67rem;
    background: var(--cream);
    border: 1px solid var(--border);
    color: var(--muted);
    padding: 2px 7px;
    border-radius: var(--r-sm);
}

/* Wide card variant (full-width in grid) */
.arch-perf-card.wide {
    grid-column: 1 / -1;
}

/* ────────────────────────────────────────────────────────────────
   External SaaS
   ──────────────────────────────────────────────────────────────── */
.arch-saas-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.arch-saas-card {
    border-radius: var(--r-lg);
    border: 1.5px solid var(--border);
    overflow: hidden;
    transition: box-shadow var(--t), transform var(--t);
}

.arch-saas-card:hover {
    box-shadow: 0 6px 24px rgba(26,23,20,0.1);
    transform: translateY(-2px);
}

.arch-saas-card-header {
    padding: 18px 22px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border);
}

.arch-saas-card-header-icon {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.arch-saas-card-header-icon.aiven   { background: rgba(255,95,63,0.1); }
.arch-saas-card-header-icon.atlas   { background: rgba(0,168,80,0.1); }

.arch-saas-card-header-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--ink);
}

.arch-saas-card-header-url {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    color: var(--muted);
    margin-top: 2px;
}

.arch-saas-card-body {
    padding: 16px 22px 20px;
    background: var(--cream);
}

.arch-saas-service-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.arch-saas-service-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.arch-saas-service-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--accent);
    margin-top: 6px;
    flex-shrink: 0;
}

.arch-saas-service-name {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 2px;
}

.arch-saas-service-desc {
    font-size: 0.78rem;
    color: var(--muted);
    line-height: 1.55;
}

/* ────────────────────────────────────────────────────────────────
   DB Schema
   ──────────────────────────────────────────────────────────────── */
.arch-db-tabs {
    display: flex;
    gap: 4px;
    border-bottom: 2px solid var(--border);
    margin-bottom: 32px;
    overflow-x: auto;
    padding: 0 2px;
    background: rgba(0,0,0,0.03);
    border-radius: var(--r-lg) var(--r-lg) 0 0;
    padding-top: 10px;
    padding-left: 10px;
}

.arch-db-tab {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 9px 20px 10px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--muted);
    cursor: pointer;
    background: rgba(0,0,0,0.04);
    border: 1.5px solid var(--border);
    border-bottom: 2px solid var(--border);
    border-radius: 6px 6px 0 0;
    margin-bottom: -2px;
    white-space: nowrap;
    transition: color var(--t), background var(--t), border-color var(--t);
}

.arch-db-tab:hover {
    color: var(--ink);
    background: rgba(0,0,0,0.01);
    border-color: color-mix(in srgb, var(--border) 70%, var(--ink) 30%);
}

.arch-db-tab.active {
    color: var(--accent);
    background: var(--paper, #fff);
    border-color: var(--border);
    border-bottom-color: var(--paper, #fff);
    font-weight: 700;
}

.arch-db-tab-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.arch-db-tab-dot.mysql      { background: #00758f; }
.arch-db-tab-dot.postgres   { background: #336791; }
.arch-db-tab-dot.mongo      { background: #00a850; }
.arch-db-tab-dot.redis      { background: #d82c20; }

.arch-db-panel { display: none; }
.arch-db-panel.active { display: block; }

/* ────────────────────────────────────────────────────────────────
   ERD
   ──────────────────────────────────────────────────────────────── */
.arch-erd-wrap {
    margin-top: 32px;
    margin-bottom: 40px;
    border: 1.5px solid var(--border);
    border-radius: var(--r-lg);
    overflow-x: auto;   /* PC: 원본 크기 초과 시 가로 스크롤 */
    overflow-y: hidden;
    background: #fff;
}

.arch-erd-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--muted);
    text-transform: uppercase;
    background: rgba(0,0,0,0.04);
    border-bottom: 1.5px solid var(--border);
    padding: 10px 18px;
    margin: 0;
}

.arch-erd-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    min-height: 260px;
    background: repeating-linear-gradient(
        -45deg,
        transparent,
        transparent 10px,
        rgba(0,0,0,0.018) 10px,
        rgba(0,0,0,0.018) 20px
    );
}

.arch-erd-placeholder-icon {
    font-size: 2.4rem;
    opacity: 0.35;
}

.arch-erd-placeholder-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--muted);
    opacity: 0.7;
}

.arch-erd-img {
    display: block;
    max-width: none;   /* PC: 원본 크기 */
    height: auto;
    margin: 0 auto;
}

.arch-db-tables-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 20px;
}

.arch-db-table-card {
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    overflow: hidden;
}

.arch-db-table-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--ink);
    color: var(--paper);
}

.arch-db-table-name {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.82rem;
    font-weight: 600;
}

.arch-db-table-badge {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.62rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 2px 7px;
    border-radius: 3px;
    border: 1px solid rgba(245,240,232,0.2);
    color: rgba(245,240,232,0.6);
}

.arch-db-col-list {
    list-style: none;
}

.arch-db-col-item {
    display: grid;
    grid-template-columns: 1fr auto auto;
    gap: 8px;
    align-items: baseline;
    padding: 7px 16px;
    border-bottom: 1px solid var(--border);
    font-size: 0.78rem;
    transition: background var(--t);
}

.arch-db-col-item:last-child { border-bottom: none; }
.arch-db-col-item:hover { background: var(--cream); }

.arch-db-col-name {
    font-family: 'JetBrains Mono', monospace;
    color: var(--ink);
}

.arch-db-col-name.pk {
    color: var(--accent);
    font-weight: 600;
}

.arch-db-col-name.fk { color: #3a5a8c; }

.arch-db-col-type {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--muted);
    text-align: right;
}

.arch-db-col-flag {
    font-size: 0.65rem;
    color: var(--muted);
    text-align: right;
    white-space: nowrap;
}

.arch-db-col-flag.pk-flag {
    color: var(--accent);
    font-weight: 600;
}

.arch-db-col-flag.fk-flag { color: #3a5a8c; }
.arch-db-col-flag.idx-flag { color: #6a8050; }

/* MongoDB document card */
.arch-db-doc-card {
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    overflow: hidden;
    max-width: 500px;
}

.arch-db-doc-card-header {
    padding: 12px 16px;
    background: #00a850;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.arch-db-doc-card-header .arch-db-table-name { color: #fff; }
.arch-db-doc-card-header .arch-db-table-badge {
    border-color: rgba(255,255,255,0.3);
    color: rgba(255,255,255,0.75);
}

.arch-db-json-preview {
    padding: 16px;
    background: var(--code-bg);
    color: var(--code-fg);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    line-height: 1.65;
    overflow-x: auto;
}

.arch-db-json-preview .jk  { color: #9ecbff; }  /* key */
.arch-db-json-preview .jt  { color: #79b8ff; }  /* type annotation */
.arch-db-json-preview .jv  { color: #85e89d; }  /* value string */
.arch-db-json-preview .jc  { color: #6a737d; }  /* comment */
.arch-db-json-preview .jp  { color: #f97583; }  /* punctuation */
.arch-db-json-preview .ji  { color: #b392f0; }  /* index/pk */

/* Redis key patterns */
.arch-db-redis-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.arch-db-redis-item {
    display: flex;
    align-items: baseline;
    gap: 12px;
    padding: 10px 14px;
    background: var(--cream);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    flex-wrap: wrap;
}

.arch-db-redis-key {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.78rem;
    color: #d82c20;
    flex-shrink: 0;
}

.arch-db-redis-desc {
    font-size: 0.8rem;
    color: var(--muted);
    flex: 1;
}

.arch-db-redis-ttl {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--accent2);
    white-space: nowrap;
}

/* ────────────────────────────────────────────────────────────────
   Trouble Shooting
   ──────────────────────────────────────────────────────────────── */
.arch-ts-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.arch-ts-card {
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    overflow: hidden;
    transition: box-shadow var(--t);
}

.arch-ts-card:hover {
    box-shadow: 0 4px 16px rgba(26,23,20,0.08);
}

/* 번호별 left-border 색상 */
.arch-ts-card:nth-child(1) { border-left: 3px solid #c0392b; }
.arch-ts-card:nth-child(2) { border-left: 3px solid #e67e22; }
.arch-ts-card:nth-child(3) { border-left: 3px solid #f1c40f; }
.arch-ts-card:nth-child(4) { border-left: 3px solid #27ae60; }
.arch-ts-card:nth-child(5) { border-left: 3px solid #2980b9; }
.arch-ts-card:nth-child(6) { border-left: 3px solid #8e44ad; }

.arch-ts-card-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    cursor: pointer;
    user-select: none;
    background: var(--cream);
    transition: background var(--t);
}

.arch-ts-card-header:hover { background: #e8e2d6; }

.arch-ts-num {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--ink);
    color: var(--paper);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.arch-ts-card-title {
    flex: 1;
    font-family: 'EB Garamond', serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--ink);
    line-height: 1.4;
}

.arch-ts-card-module {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    background: rgba(26,23,20,0.06);
    padding: 3px 8px;
    border-radius: var(--r-sm);
    white-space: nowrap;
    flex-shrink: 0;
}

.arch-ts-chevron {
    flex-shrink: 0;
    color: var(--muted);
    transition: transform 0.2s ease;
}

.arch-ts-card.open .arch-ts-chevron {
    transform: rotate(180deg);
}

.arch-ts-card-body {
    display: none;
    padding: 0 20px 20px;
    border-top: 1px solid var(--border);
    background: #fff;
}

.arch-ts-card.open .arch-ts-card-body {
    display: block;
}

.arch-ts-rows {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-top: 16px;
}

.arch-ts-row {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px dashed var(--border);
    align-items: flex-start;
}

.arch-ts-row:last-child { border-bottom: none; }

.arch-ts-row-label {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 72px;
    padding-top: 1px;
}

.arch-ts-row-label-icon { font-size: 0.9rem; }

.arch-ts-row-label-text {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 600;
}

.arch-ts-row.symptom .arch-ts-row-label-text  { color: #c0392b; }
.arch-ts-row.cause   .arch-ts-row-label-text  { color: #e67e22; }
.arch-ts-row.solution .arch-ts-row-label-text { color: #27ae60; }

.arch-ts-row-content {
    font-size: 0.855rem;
    color: var(--ink);
    line-height: 1.75;
    flex: 1;
    opacity: 0.85;
}

.arch-ts-row-content code {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8em;
    background: rgba(26,23,20,0.07);
    padding: 1px 5px;
    border-radius: 3px;
    color: var(--accent);
}

/* ────────────────────────────────────────────────────────────────
   Screen Descriptions & Flow
   ──────────────────────────────────────────────────────────────── */
.arch-screens-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 56px;
}

.arch-screen-card {
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    overflow: hidden;
    transition: box-shadow var(--t), transform var(--t);
}

.arch-screen-card:hover {
    box-shadow: 0 4px 20px rgba(26,23,20,0.09);
    transform: translateY(-2px);
}

/* Screen image placeholder */
.arch-screen-img {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: var(--cream);
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.arch-screen-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.arch-screen-img-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.arch-screen-img-placeholder-icon {
    font-size: 1.8rem;
    opacity: 0.35;
}

.arch-screen-img-placeholder-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
    opacity: 0.6;
}

.arch-screen-url-badge {
    position: absolute;
    bottom: 8px;
    left: 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    background: rgba(26,23,20,0.7);
    color: rgba(245,240,232,0.85);
    padding: 2px 8px;
    border-radius: 3px;
    backdrop-filter: blur(4px);
}

.arch-screen-card-body {
    padding: 16px 18px 18px;
}

.arch-screen-card-title {
    font-family: 'EB Garamond', serif;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: 6px;
}

.arch-screen-card-desc {
    font-size: 0.82rem;
    color: var(--muted);
    line-height: 1.7;
    margin-bottom: 12px;
}

.arch-screen-features {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
}

.arch-screen-feature-tag {
    font-size: 0.7rem;
    background: var(--cream);
    border: 1px solid var(--border);
    color: var(--muted);
    padding: 2px 8px;
    border-radius: var(--r-sm);
}

/* Request Flow Diagram */
.arch-flow-diagram {
    background: var(--cream);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 36px 32px;
    overflow-x: auto;
}

.arch-flow-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 28px;
}

.arch-flow-row {
    display: flex;
    align-items: center;
    gap: 0;
    min-width: 600px;
}

.arch-flow-row + .arch-flow-row {
    margin-top: 10px;
}

.arch-flow-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    flex-shrink: 0;
}

.arch-flow-box {
    padding: 9px 16px;
    border-radius: var(--r-md);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.76rem;
    font-weight: 500;
    text-align: center;
    white-space: nowrap;
    line-height: 1.3;
}

.arch-flow-box.client      { background: #e8f4fd; border: 1.5px solid #aad4f5; color: #1a6fa8; }
.arch-flow-box.nginx       { background: #e8f7e8; border: 1.5px solid #a0d8a0; color: #2d7a2d; }
.arch-flow-box.app         { background: rgba(139,58,42,0.08); border: 1.5px solid rgba(139,58,42,0.3); color: var(--accent); }
.arch-flow-box.worker      { background: rgba(100,120,80,0.08); border: 1.5px solid rgba(100,120,80,0.3); color: #5a7040; }
.arch-flow-box.kafka       { background: #fff0e6; border: 1.5px solid #ffc080; color: #cc6600; }
.arch-flow-box.mysql       { background: #e8f4f8; border: 1.5px solid #80c4d8; color: #00758f; }
.arch-flow-box.mongo       { background: #edf7ed; border: 1.5px solid #80c880; color: #006630; }
.arch-flow-box.postgres    { background: #eaeef8; border: 1.5px solid #8899cc; color: #336791; }
.arch-flow-box.redis       { background: #fdeaea; border: 1.5px solid #e88080; color: #a02020; }
.arch-flow-box.gdrive      { background: #fef9e8; border: 1.5px solid #e8d060; color: #8a6800; }
.arch-flow-box.sre         { background: #f0eaf8; border: 1.5px solid #c0a8e8; color: #6040a0; }
.arch-flow-box.web         { background: rgba(139,58,42,0.06); border: 1.5px solid rgba(139,58,42,0.25); color: var(--accent); }
.arch-flow-box.browser     { background: #e8f4fd; border: 1.5px solid #aad4f5; color: #1a6fa8; }

.arch-flow-row--fork {
    align-items: center;
}
.arch-flow-fork {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.arch-flow-fork-branch {
    display: flex;
    align-items: center;
}

.arch-flow-consumer-group-note {
    margin-top: 16px;
    padding: 12px 16px;
    background: #fff8f0;
    border: 1px solid #ffc080;
    border-radius: var(--r-md, 5px);
    font-size: 0.78rem;
    color: var(--muted, #7a736a);
    line-height: 1.6;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 6px 10px;
}
.arch-flow-consumer-group-badge {
    display: inline-block;
    padding: 2px 8px;
    background: #ffc080;
    color: #7a3d00;
    border-radius: 3px;
    font-size: 0.68rem;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    letter-spacing: 0.04em;
    white-space: nowrap;
}
.arch-flow-consumer-group-item {
    display: inline-block;
    padding: 2px 8px;
    background: var(--cream, #ede8dc);
    border: 1px solid var(--border, #d4cdc0);
    border-radius: 3px;
    font-size: 0.72rem;
    color: var(--ink, #1a1714);
    white-space: nowrap;
}

.arch-flow-label {
    font-size: 0.65rem;
    color: var(--muted);
    text-align: center;
}

.arch-flow-arrow {
    display: flex;
    align-items: center;
    flex: 1;
    min-width: 28px;
    max-width: 64px;
    padding: 0 4px;
    flex-direction: column;
    gap: 2px;
}

.arch-flow-arrow-line {
    display: flex;
    align-items: center;
    width: 100%;
}

.arch-flow-arrow-line svg {
    width: 100%;
    height: 14px;
    overflow: visible;
}

.arch-flow-arrow-note {
    font-size: 0.6rem;
    color: var(--muted);
    text-align: center;
    white-space: nowrap;
}

.arch-flow-divider {
    border: none;
    border-top: 1px dashed var(--border);
    margin: 18px 0;
}

.arch-flow-section-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent2);
    margin-bottom: 12px;
}

/* ────────────────────────────────────────────────────────────────
   Responsive
   ──────────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .arch-hero { padding-top: calc(var(--nav-h) + 48px); padding-bottom: 56px; }
    .arch-wrap { padding: 0 20px; }
    .arch-section { padding: 48px 0; }
    .arch-overview { padding: 40px 0 36px; }
    .arch-overview-highlights { grid-template-columns: 1fr; gap: 16px; }
    .arch-erd-wrap { overflow-x: hidden; }
    .arch-erd-img { width: 100%; max-width: 100%; }
    .arch-features-grid { grid-template-columns: 1fr; }
    .arch-obs-grid { grid-template-columns: repeat(2, 1fr); }
    .arch-why-grid { grid-template-columns: 1fr; }
    .arch-deploy-banner { padding: 24px; flex-direction: column; gap: 20px; }
    .arch-stack-table td:first-child { width: auto; }
    .arch-module-table { display: block; overflow-x: auto; }
    .arch-stack-table { display: block; overflow-x: auto; }
    .arch-perf-grid { grid-template-columns: 1fr; }
    .arch-perf-card.wide { grid-column: auto; }
    .arch-saas-grid { grid-template-columns: 1fr; }
    .arch-db-tables-grid { grid-template-columns: 1fr; }
    .arch-screens-grid { grid-template-columns: 1fr; }
    .arch-flow-diagram { padding: 20px 16px; }
}

@media (max-width: 480px) {
    .arch-obs-grid { grid-template-columns: 1fr; }
    .arch-hero-title { font-size: 2rem; }
    .arch-db-tabs { gap: 0; }
    .arch-db-tab { padding: 8px 12px; font-size: 0.72rem; }
}

/* ────────────────────────────────────────────────────────────────
   Lightbox  (클래스명: arch-lightbox-* — lifelog.css의 .lightbox와 충돌 방지)
   ──────────────────────────────────────────────────────────────── */
.arch-screen-thumb {
    cursor: zoom-in;
    transition: opacity 0.2s ease, transform 0.2s ease;
}
.arch-screen-thumb:hover {
    opacity: 0.88;
    transform: scale(1.015);
}

.arch-lightbox {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 99000;
    align-items: center;
    justify-content: center;
}
.arch-lightbox.is-open { display: flex; }

.arch-lightbox-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(20, 17, 14, 0.88);
    backdrop-filter: blur(4px);
    animation: lbFadeIn 0.22s ease forwards;
}

.arch-lightbox-close {
    position: absolute;
    top: 18px;
    right: 22px;
    z-index: 99002;
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 50%;
    color: #fff;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.18s;
}
.arch-lightbox-close:hover { background: rgba(255,255,255,0.25); }

.arch-lightbox-content {
    position: relative;
    z-index: 99001;
    max-width: min(90vw, 1200px);
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    animation: lbSlideUp 0.24s ease forwards;
}
.arch-lightbox-content img {
    max-width: 100%;
    max-height: 82vh;
    object-fit: contain;
    border-radius: 5px;
    box-shadow: 0 16px 48px rgba(0,0,0,0.55);
    display: block;
}

.arch-lightbox-caption {
    color: rgba(255,255,255,0.7);
    font-size: 0.82rem;
    text-align: center;
    letter-spacing: 0.02em;
}

.arch-lightbox.is-loading .arch-lightbox-content::before {
    content: '';
    display: block;
    width: 36px;
    height: 36px;
    border: 3px solid rgba(255,255,255,0.2);
    border-top-color: rgba(255,255,255,0.8);
    border-radius: 50%;
    animation: lbSpin 0.7s linear infinite;
    margin: 40px auto;
}
.arch-lightbox.is-loading img { display: none; }

@keyframes lbFadeIn  { from { opacity: 0; } to { opacity: 1; } }
@keyframes lbSlideUp {
    from { opacity: 0; transform: translateY(18px) scale(0.97); }
    to   { opacity: 1; transform: translateY(0)    scale(1);    }
}
@keyframes lbSpin { to { transform: rotate(360deg); } }

@media (max-width: 768px) {
    .arch-lightbox-content { max-width: 95vw; }
    .arch-lightbox-content img { max-height: 78vh; }
}