/* ── Backend Architecture Section ─────────────────────────────────────────── */

.backend-arch-section {
    padding: 80px 60px;
    background: transparent;
    color: #e6edf3;
}

.backend-arch-title {
    text-align: center;
    font-size: 1.7rem;
    font-weight: 800;
    color: #ffffff;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.backend-arch-sub {
    text-align: center;
    color: #8b949e;
    font-size: 0.95rem;
    margin-bottom: 48px;
}

/* ── 3 capas ── */
.arch-layers {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.arch-layer {
    border-radius: 12px;
    padding: 20px;
    width: 220px;
    flex-shrink: 0;
}

.arch-layer-label {
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 14px;
    text-align: center;
}

.arch-frontend {
    border: 2px dashed #2da44e;
    background: #0d1f17;
}
.arch-frontend .arch-layer-label { color: #3fb950; }

.arch-backend {
    border: 2px dashed #58a6ff;
    background: #0d1a2e;
    width: 260px;
}
.arch-backend .arch-layer-label { color: #79c0ff; }

.arch-db {
    border: 2px dashed #d4a72c;
    background: #1f1a0d;
    width: 280px;
    flex-shrink: 0;
}
.arch-db .arch-layer-label { color: #e3b341; line-height: 1.4; }

.arch-layer-desc {
    font-size: 0.78rem;
    color: #8b949e;
    margin-top: 12px;
    text-align: center;
    line-height: 1.5;
}

/* ── Flechas entre capas ── */
.arch-arrow-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0 8px;
    min-width: 70px;
    padding-top: 60px;
}

.arch-arrow-label {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    color: #8b949e;
    text-align: center;
    margin-bottom: 4px;
    line-height: 1.4;
}
.arch-arrow-label span { font-weight: 400; text-transform: none; color: #6e7681; }

.arch-arrow {
    font-size: 2rem;
    color: #30363d;
}

/* ── Browser mock ── */
.arch-browser {
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid #30363d;
    background: #161b22;
}
.arch-browser-bar {
    background: #21262d;
    padding: 6px 10px;
    display: flex;
    gap: 5px;
}
.arch-browser-bar span {
    width: 9px; height: 9px;
    border-radius: 50%;
    background: #30363d;
    display: block;
}
.arch-browser-body {
    padding: 16px;
    text-align: center;
}
.arch-brand {
    font-size: 1rem;
    font-weight: 700;
    color: #00c896;
    margin-bottom: 10px;
}
.arch-fake-btn {
    background: #2da44e;
    color: white;
    border: none;
    padding: 7px 14px;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: default;
}

/* ── Routes box ── */
.arch-routes {
    background: #161b22;
    border-radius: 8px;
    border: 1px solid #30363d;
    padding: 12px;
}
.arch-route-title {
    font-size: 0.72rem;
    font-weight: 700;
    color: #8b949e;
    text-transform: uppercase;
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}
.arch-route {
    font-size: 0.72rem;
    padding: 3px 0;
    color: #c9d1d9;
    display: flex;
    gap: 6px;
    align-items: center;
}
.arch-route em {
    color: #6e7681;
    font-style: normal;
}
.arch-route.muted { color: #6e7681; }

.method {
    font-size: 0.62rem;
    font-weight: 700;
    padding: 1px 5px;
    border-radius: 3px;
    flex-shrink: 0;
}
.method.post { background: #1f3d1f; color: #3fb950; }
.method.get  { background: #1a2f4a; color: #58a6ff; }

/* ── Cylinders ── */
.arch-cylinders {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    margin-bottom: 10px;
}

.arch-cyl {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
}

.arch-cyl-top {
    width: 52px;
    height: 10px;
    background: #1a3a5c;
    border: 1px solid #58a6ff;
    border-radius: 50%;
    position: relative;
    z-index: 1;
}

.arch-cyl-body {
    width: 52px;
    height: 54px;
    background: linear-gradient(180deg, #1a3a5c, #0d1a2e);
    border-left: 1px solid #58a6ff;
    border-right: 1px solid #58a6ff;
    border-bottom: 1px solid #58a6ff;
    border-radius: 0 0 6px 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.arch-cyl-body img {
    width: 32px;
    height: 32px;
    object-fit: contain;
    filter: brightness(1.2);
}

.arch-cyl-name {
    font-size: 0.65rem;
    font-weight: 700;
    color: #c9d1d9;
    margin-top: 5px;
}

.arch-cyl-port {
    font-size: 0.6rem;
    color: #e3b341;
    font-family: monospace;
}

.arch-cyl-arrows {
    font-size: 1rem;
    color: #d4a72c;
    opacity: 0.7;
    flex-shrink: 0;
    padding-bottom: 18px;
}

/* ── DB nodes ── */
.arch-raft-label {
    font-size: 0.65rem;
    color: #8b949e;
    text-align: center;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

/* ── Respuesta ── */
.arch-response-row {
    display: flex;
    align-items: center;
    gap: 0;
    justify-content: center;
    margin: 16px 0 40px;
    max-width: 860px;
    margin-left: auto;
    margin-right: auto;
}
.arch-response-end {
    font-size: 1.3rem;
    color: #79c0ff;
    flex-shrink: 0;
    padding: 0 4px;
}
.arch-response-arrow {
    flex: 1;
    background: linear-gradient(90deg, #161b22, #1a2236, #161b22);
    border-top: 2px dashed #30363d;
    border-bottom: 2px dashed #30363d;
    padding: 8px 16px;
    text-align: center;
    font-size: 0.78rem;
    font-weight: 700;
    color: #79c0ff;
    letter-spacing: 1px;
}
.arch-response-desc {
    display: none;
}

/* ── Bottom (steps + fallback) ── */
.arch-bottom {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.arch-steps-box {
    flex: 2;
    min-width: 280px;
    background: #161b22;
    border: 1px solid #30363d;
    border-radius: 12px;
    padding: 20px;
}

.arch-fallback-box {
    flex: 1;
    min-width: 220px;
    background: #161b22;
    border: 1px solid #30363d;
    border-radius: 12px;
    padding: 20px;
}

.arch-steps-title {
    font-size: 0.72rem;
    font-weight: 800;
    color: #58a6ff;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 16px;
}

.arch-steps {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.arch-step {
    background: #0d1117;
    border: 1px solid #21262d;
    border-radius: 8px;
    padding: 10px 8px;
    text-align: center;
    flex: 1;
    min-width: 80px;
}
.arch-step-num {
    width: 20px; height: 20px;
    background: #58a6ff;
    color: #0d1117;
    border-radius: 50%;
    font-size: 0.7rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 6px;
}
.arch-step-icon { font-size: 1.3rem; margin-bottom: 4px; }
.arch-step-name { font-size: 0.65rem; font-weight: 700; color: #c9d1d9; margin-bottom: 4px; }
.arch-step-desc { font-size: 0.62rem; color: #6e7681; line-height: 1.4; }

/* ── Fallback ── */
.arch-fallback-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid #21262d;
}
.arch-fallback-item:last-of-type { border-bottom: none; }

.arch-fallback-num {
    width: 22px; height: 22px;
    border-radius: 50%;
    background: #21262d;
    color: #c9d1d9;
    font-size: 0.72rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.arch-fallback-text { font-size: 0.78rem; color: #8b949e; flex: 1; line-height: 1.4; }
.arch-fallback-ok   { color: #3fb950; font-size: 1.1rem; }
.arch-fallback-warn { color: #d4a72c; font-size: 1.1rem; }

.arch-fallback-note {
    margin-top: 14px;
    background: #1f2b1f;
    border: 1px solid #2da44e;
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 0.78rem;
    color: #3fb950;
    line-height: 1.5;
}

/* ── Info row ── */
.arch-info-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.arch-info-card {
    flex: 1;
    min-width: 200px;
    background: #161b22;
    border: 1px solid #30363d;
    border-radius: 10px;
    padding: 18px;
}
.arch-info-tech { border-color: #d4a72c; }

.arch-info-title {
    font-size: 0.72rem;
    font-weight: 800;
    color: #58a6ff;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 10px;
}
.arch-info-tech .arch-info-title { color: #e3b341; }

.arch-info-card p,
.arch-info-card li {
    font-size: 0.82rem;
    color: #8b949e;
    line-height: 1.6;
}
.arch-info-card ul {
    padding-left: 16px;
    margin: 0;
}