/* ============================================================
   Guide Index — architecture-style layered overview
   Hand-written CSS mirroring iot.obniz.com/architecture/
   ============================================================ */

/* Override the parent .container/.page-header so this page can be full-width.
   Targets only pages where the body contains a .gx-root element. */
.wrap.container:has(.gx-root) {
    max-width: none;
    width: 100%;
    padding: 0;
}
.wrap.container:has(.gx-root) .page-header {
    display: none;
}
.wrap.container:has(.gx-root) article.hentry {
    padding: 0;
    margin: 0;
}
.wrap.container:has(.gx-root) .main.col-sm-12 {
    padding-left: 0;
    padding-right: 0;
}
.wrap.container:has(.gx-root) .content.row {
    margin-left: 0;
    margin-right: 0;
}

.gx-root {
    font-size: 16px;
    --gx-blue-600: #2563eb;
    --gx-blue-500: #3b82f6;
    --gx-blue-300: #93c5fd;
    --gx-cyan-400: #22d3ee;
    --gx-cyan-300: #67e8f9;
    --gx-cyan-500: #06b6d4;
    --gx-indigo-300: #a5b4fc;
    --gx-indigo-500: #6366f1;
    --gx-indigo-600: #4f46e5;
    --gx-sky-600: #0284c7;
    --gx-gray-50: #f9fafb;
    --gx-gray-100: #f3f4f6;
    --gx-gray-200: #e5e7eb;
    --gx-gray-300: #d1d5db;
    --gx-gray-400: #9ca3af;
    --gx-gray-500: #6b7280;
    --gx-gray-600: #4b5563;
    --gx-gray-700: #374151;
    --gx-gray-900: #111827;
    color: var(--gx-gray-900);
    line-height: 1.6;
}
.gx-root *,
.gx-root *::before,
.gx-root *::after {
    box-sizing: border-box;
}
.gx-root a {
    color: inherit;
    text-decoration: none;
}

/* ─── Hero ─────────────────────────────────────────────── */
.gx-hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(
        135deg,
        #0a0f1e 0%,
        #0d1530 50%,
        #0a1e3a 100%
    );
    color: #fff;
}
.gx-hero__blobs {
    pointer-events: none;
    position: absolute;
    inset: 0;
}
.gx-hero__blob {
    position: absolute;
    border-radius: 9999px;
    mix-blend-mode: screen;
    filter: blur(120px);
}
.gx-hero__blob--a {
    top: -8em;
    left: -8em;
    width: 520px;
    height: 520px;
    background: rgba(59, 130, 246, 0.3);
    animation: gxPulse 8s ease-in-out infinite;
}
.gx-hero__blob--b {
    top: 33%;
    right: -8em;
    width: 520px;
    height: 520px;
    background: rgba(34, 211, 238, 0.2);
    animation: gxPulse 10s ease-in-out infinite;
}
.gx-hero__blob--c {
    bottom: -8em;
    left: 33%;
    width: 420px;
    height: 420px;
    background: rgba(99, 102, 241, 0.2);
    animation: gxPulse 12s ease-in-out infinite;
}
@keyframes gxPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}
.gx-hero__grid {
    pointer-events: none;
    position: absolute;
    inset: 0;
    opacity: 0.07;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.4) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.4) 1px, transparent 1px);
    background-size: 64px 64px;
}
.gx-hero__inner {
    position: relative;
    max-width: 80em;
    margin: 0 auto;
    padding: 5em 1em 6em;
}
@media (min-width: 640px) {
    .gx-hero__inner { padding-left: 1.5em; padding-right: 1.5em; }
}
@media (min-width: 1024px) {
    .gx-hero__inner { padding: 7em 2em 9em; }
}
.gx-hero__content { max-width: 48em; }
.gx-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    padding: 0.25em 0.75em;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    margin-bottom: 1.5em;
}
.gx-badge__dot {
    position: relative;
    display: inline-block;
    width: 0.5em;
    height: 0.5em;
}
.gx-badge__dot::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 9999px;
    background: var(--gx-cyan-400);
    opacity: 0.75;
    animation: gxPing 1.5s cubic-bezier(0, 0, 0.2, 1) infinite;
}
.gx-badge__dot::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 9999px;
    background: var(--gx-cyan-400);
}
@keyframes gxPing {
    75%, 100% { transform: scale(2); opacity: 0; }
}
.gx-badge__text {
    font-size: 0.75em;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.8);
    letter-spacing: 0.025em;
}
.gx-hero h1.gx-hero__title {
    font-size: 2.25em;
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.15;
    margin: 0 0 1.5em;
    color: #fff;
    border: 0;
    padding: 0;
}
@media (min-width: 640px) {
    .gx-hero h1.gx-hero__title { font-size: 3em; }
}
@media (min-width: 1024px) {
    .gx-hero h1.gx-hero__title { font-size: 3.75em; }
}
.gx-grad {
    background: linear-gradient(
        90deg,
        var(--gx-cyan-300),
        var(--gx-blue-300),
        var(--gx-indigo-300)
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.gx-hero__lead {
    font-size: 1.125em;
    color: #d1d5db;
    line-height: 1.7;
    margin: 0 0 1em;
    max-width: 36em;
}
@media (min-width: 1024px) {
    .gx-hero__lead { font-size: 1.25em; }
}
.gx-hero__sub {
    font-size: 0.875em;
    color: #9ca3af;
    line-height: 1.7;
    margin: 0 0 2.5em;
    max-width: 36em;
}
.gx-hero__cta { display: flex; flex-wrap: wrap; gap: 0.75em; }
.gx-root .gx-btn-primary,
.gx-root .gx-btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    padding: 0.875em 1.5em;
    font-size: 0.875em;
    font-weight: 600;
    border-radius: 0.5em;
    transition: all 0.2s;
    cursor: pointer;
    text-decoration: none !important;
}
.gx-root .gx-btn-primary {
    color: #111827;
    background: #fff;
    box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.1);
}
.gx-root .gx-btn-primary:hover {
    background: var(--gx-gray-100);
    box-shadow: 0 20px 25px -5px rgba(59, 130, 246, 0.2);
    color: #111827;
}
.gx-root .gx-btn-secondary {
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(8px);
}
.gx-root .gx-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
    color: #fff;
}
.gx-btn-arrow { width: 1em; height: 1em; flex-shrink: 0; }

/* ─── Section ──────────────────────────────────────────── */
.gx-section {
    position: relative;
    padding: 5em 0;
    background: linear-gradient(180deg, var(--gx-gray-50) 0%, #fff 100%);
}
@media (min-width: 1024px) {
    .gx-section { padding: 7em 0; }
}
.gx-section__inner {
    max-width: 80em;
    margin: 0 auto;
    padding: 0 1em;
}
@media (min-width: 640px) {
    .gx-section__inner { padding: 0 1.5em; }
}
@media (min-width: 1024px) {
    .gx-section__inner { padding: 0 2em; }
}
.gx-section__head {
    text-align: center;
    max-width: 48em;
    margin: 0 auto 3.5em;
}
.gx-eyebrow {
    color: var(--gx-blue-600);
    font-size: 0.75em;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin: 0 0 0.75em;
}
.gx-section h2.gx-h2 {
    font-size: 1.875em;
    font-weight: 700;
    color: var(--gx-gray-900);
    letter-spacing: -0.025em;
    line-height: 1.25;
    margin: 0;
    padding: 0;
    border: 0;
}
@media (min-width: 768px) {
    .gx-section h2.gx-h2 { font-size: 2.25em; }
}
.gx-h2__grad {
    background: linear-gradient(90deg, var(--gx-blue-600), var(--gx-cyan-500));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.gx-section__lead {
    margin: 1.25em 0 0;
    color: var(--gx-gray-600);
    line-height: 1.7;
}

/* ─── Layer cards ──────────────────────────────────────── */
.gx-layers { display: flex; flex-direction: column; gap: 1.5em; }
.gx-layer {
    position: relative;
    background: #fff;
    border: 1px solid var(--gx-gray-200);
    border-radius: 1.5em;
    overflow: hidden;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.gx-layer:hover {
    border-color: #bfdbfe;
    box-shadow: 0 20px 25px -5px rgba(59, 130, 246, 0.05),
        0 8px 10px -6px rgba(59, 130, 246, 0.05);
}
.gx-layer__bar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}
.gx-layer--01 .gx-layer__bar { background: linear-gradient(90deg, var(--gx-cyan-400), var(--gx-blue-300)); }
.gx-layer--02 .gx-layer__bar { background: linear-gradient(90deg, var(--gx-blue-300), var(--gx-blue-500)); }
.gx-layer--03 .gx-layer__bar { background: linear-gradient(90deg, var(--gx-blue-500), var(--gx-blue-600)); }
.gx-layer--04 .gx-layer__bar { background: linear-gradient(90deg, var(--gx-indigo-500), var(--gx-blue-600)); }
.gx-layer--05 .gx-layer__bar { background: linear-gradient(90deg, var(--gx-indigo-600), var(--gx-indigo-300)); }
.gx-layer--06 .gx-layer__bar { background: linear-gradient(90deg, var(--gx-cyan-500), var(--gx-cyan-300)); }
.gx-layer__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2em;
    padding: 2em;
}
@media (min-width: 1024px) {
    .gx-layer__grid {
        grid-template-columns: 4fr 8fr;
        padding: 2.5em;
    }
}
.gx-layer__label {
    font-size: 0.75em;
    font-weight: 600;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin: 0 0 0.5em;
    color: var(--gx-sky-600);
}
.gx-layer--01 .gx-layer__label { color: var(--gx-cyan-500); }
.gx-layer--02 .gx-layer__label { color: var(--gx-blue-500); }
.gx-layer--03 .gx-layer__label { color: var(--gx-blue-600); }
.gx-layer--04 .gx-layer__label { color: var(--gx-indigo-500); }
.gx-layer--05 .gx-layer__label { color: var(--gx-indigo-600); }
.gx-layer--06 .gx-layer__label { color: var(--gx-cyan-500); }
.gx-layer h3.gx-layer__title {
    font-size: 1.5em;
    font-weight: 700;
    color: var(--gx-gray-900);
    letter-spacing: -0.025em;
    line-height: 1.25;
    margin: 0 0 0.5em;
    border: 0;
    padding: 0;
}
@media (min-width: 1024px) {
    .gx-layer h3.gx-layer__title { font-size: 1.875em; }
}
.gx-layer__sub {
    font-size: 0.875em;
    color: var(--gx-gray-500);
    line-height: 1.7;
    margin: 0 0 1em;
}
.gx-layer__desc {
    font-size: 0.875em;
    color: var(--gx-gray-600);
    line-height: 1.7;
    margin: 0;
}

/* Items grid */
.gx-items {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75em;
}
@media (min-width: 640px) {
    .gx-items { grid-template-columns: 1fr 1fr; }
}
.gx-item {
    display: block;
    padding: 1em;
    border: 1px solid var(--gx-gray-200);
    border-radius: 0.75em;
    background: rgba(249, 250, 251, 0.6);
    transition: all 0.2s;
    cursor: pointer;
}
.gx-item:hover {
    border-color: #bfdbfe;
    background: #fff;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    text-decoration: none !important;
}
.gx-item__row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75em;
}
.gx-item__body { min-width: 0; flex: 1; }
.gx-item__title {
    font-size: 0.875em;
    font-weight: 700;
    color: var(--gx-gray-900);
    letter-spacing: -0.015em;
    margin: 0;
    line-height: 1.4;
}
.gx-item__desc {
    font-size: 0.75em;
    color: var(--gx-gray-500);
    margin: 0.25em 0 0;
    line-height: 1.5;
}
.gx-item__arrow {
    width: 1em;
    height: 1em;
    color: var(--gx-gray-400);
    flex-shrink: 0;
    margin-top: 0.125em;
    transition: transform 0.2s, color 0.2s;
}
.gx-item:hover .gx-item__arrow {
    transform: translateX(2px);
    color: var(--gx-blue-600);
}
.gx-item--ext .gx-item__title::after {
    content: " ↗";
    color: var(--gx-gray-400);
    font-weight: 400;
}
.gx-item--static {
    cursor: default;
}
.gx-item--static:hover {
    border-color: var(--gx-gray-200);
    background: rgba(249, 250, 251, 0.6);
    box-shadow: none;
}

/* ─── Closing CTA card ────────────────────────────────── */
.gx-cta-section {
    padding: 4em 1em 6em;
    background: #fff;
}
@media (min-width: 640px) {
    .gx-cta-section { padding-left: 1.5em; padding-right: 1.5em; }
}
@media (min-width: 1024px) {
    .gx-cta-section { padding: 6em 2em 8em; }
}
.gx-cta {
    position: relative;
    overflow: hidden;
    max-width: 80em;
    margin: 0 auto;
    border-radius: 1.5em;
    background: linear-gradient(135deg, #0a0f1e 0%, #0d1530 50%, #0a1e3a 100%);
    color: #fff;
    padding: 3em 2em;
}
@media (min-width: 1024px) {
    .gx-cta { padding: 5em 4em; }
}
.gx-cta h3.gx-cta__title {
    font-size: 1.5em;
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.25;
    color: #fff;
    margin: 0 0 1em;
    border: 0;
    padding: 0;
}
@media (min-width: 1024px) {
    .gx-cta h3.gx-cta__title { font-size: 2em; }
}
.gx-cta__lead {
    font-size: 0.9375em;
    color: #d1d5db;
    line-height: 1.7;
    margin: 0 0 2em;
    max-width: 40em;
}
.gx-cta__row { display: flex; flex-wrap: wrap; gap: 0.75em; position: relative; z-index: 1; }