/*
 * DrivErp - Micrositio tecnico de DrivErp IA (/ia/docs)
 *
 * Sigue el design system "DrivErp Modern 2026" (paleta neutra + accent
 * corporativo #008BD0, Inter, spacing 8pt, sombras sutiles). Self-contained:
 * todas las variables se declaran bajo .iad-landing para no depender de
 * tokens.css. Componentes nuevos exclusivos del docs: .iad-arch-flow
 * y .iad-layer-stack.
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ============================================================
 * Tokens (scopeados)
 * ============================================================ */
.iad-landing {
    /* Neutrals */
    --iad-neutral-0:   #FFFFFF;
    --iad-neutral-50:  #FAFAFA;
    --iad-neutral-100: #F5F5F5;
    --iad-neutral-200: #E5E5E5;
    --iad-neutral-300: #D4D4D4;
    --iad-neutral-400: #A3A3A3;
    --iad-neutral-500: #737373;
    --iad-neutral-600: #525252;
    --iad-neutral-700: #404040;
    --iad-neutral-800: #262626;
    --iad-neutral-900: #171717;

    /* Accent — Azul DrivErp #008BD0 (corporativo, fuente unica) */
    --iad-accent-50:   #E6F4FB;
    --iad-accent-100:  #C2E5F3;
    --iad-accent-200:  #8FCFEA;
    --iad-accent-500:  #008BD0;
    --iad-accent-600:  #0073AB;
    --iad-accent-700:  #005A87;
    --iad-accent-900:  #00324B;

    /* Semantic */
    --iad-success-50:  #D1FAE5;
    --iad-success-500: #10B981;
    --iad-success-700: #047857;
    --iad-warning-50:  #FEF3C7;
    --iad-warning-500: #F59E0B;
    --iad-warning-700: #B45309;
    --iad-danger-50:   #FEE2E2;
    --iad-danger-500:  #EF4444;
    --iad-danger-700:  #B91C1C;

    /* Surface */
    --iad-bg:          var(--iad-neutral-50);
    --iad-surface:     var(--iad-neutral-0);
    --iad-surface-alt: var(--iad-neutral-100);
    --iad-border:      var(--iad-neutral-200);
    --iad-text:        var(--iad-neutral-900);
    --iad-text-muted:  var(--iad-neutral-500);
    --iad-text-soft:   var(--iad-neutral-600);

    /* Typography */
    --iad-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
                Roboto, 'Helvetica Neue', system-ui, sans-serif;
    --iad-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, SFMono-Regular,
                Menlo, Consolas, monospace;

    /* Spacing 8pt */
    --iad-s-1: 4px;
    --iad-s-2: 8px;
    --iad-s-3: 12px;
    --iad-s-4: 16px;
    --iad-s-5: 20px;
    --iad-s-6: 24px;
    --iad-s-8: 32px;
    --iad-s-10: 40px;
    --iad-s-12: 48px;
    --iad-s-16: 64px;
    --iad-s-20: 80px;
    --iad-s-24: 96px;

    /* Radii */
    --iad-r-sm: 6px;
    --iad-r-md: 8px;
    --iad-r-lg: 12px;
    --iad-r-xl: 16px;
    --iad-r-2xl: 24px;
    --iad-r-pill: 9999px;

    /* Shadows */
    --iad-sh-sm: 0 1px 2px rgba(0, 50, 75, 0.04);
    --iad-sh-md: 0 4px 12px rgba(0, 50, 75, 0.06), 0 1px 2px rgba(0, 50, 75, 0.04);
    --iad-sh-lg: 0 12px 32px rgba(0, 50, 75, 0.10), 0 2px 6px rgba(0, 50, 75, 0.05);

    /* Motion */
    --iad-ease: cubic-bezier(0.4, 0, 0.2, 1);

    background: var(--iad-bg);
    color: var(--iad-text);
    font-family: var(--iad-font);
    font-size: 15px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.iad-landing,
.iad-landing * {
    box-sizing: border-box;
}

/* ============================================================
 * Layout helpers
 * ============================================================ */
.iad-landing .iad-container {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 var(--iad-s-6);
}

.iad-landing .iad-section {
    padding: var(--iad-s-20) 0;
}

.iad-landing .iad-section-head {
    text-align: center;
    max-width: 760px;
    margin: 0 auto var(--iad-s-12);
}

.iad-landing .iad-section-title {
    font-size: clamp(28px, 3.4vw, 40px);
    line-height: 1.15;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: var(--iad-s-3) 0 var(--iad-s-4);
}

.iad-landing .iad-section-lead {
    color: var(--iad-text-soft);
    font-size: 16px;
    line-height: 1.65;
    margin: 0;
}

.iad-landing .iad-text-accent {
    background: linear-gradient(135deg, var(--iad-accent-500), var(--iad-accent-700));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.iad-landing .iad-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: var(--iad-s-2);
    padding: 6px var(--iad-s-3);
    border-radius: var(--iad-r-pill);
    background: var(--iad-accent-50);
    color: var(--iad-accent-700);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.iad-landing .iad-eyebrow--soft {
    background: var(--iad-surface-alt);
    color: var(--iad-text-soft);
}

.iad-landing code,
.iad-landing .iad-code {
    font-family: var(--iad-mono);
    background: var(--iad-surface-alt);
    color: var(--iad-accent-700);
    padding: 2px 6px;
    border-radius: var(--iad-r-sm);
    font-size: 0.88em;
    font-weight: 500;
}

/* ============================================================
 * Botones
 * ============================================================ */
.iad-landing .iad-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--iad-s-2);
    padding: 12px 22px;
    border-radius: var(--iad-r-md);
    font-size: 14px;
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    border: 1px solid transparent;
    transition: transform 160ms var(--iad-ease), background 160ms var(--iad-ease),
                border-color 160ms var(--iad-ease), color 160ms var(--iad-ease),
                box-shadow 160ms var(--iad-ease);
    cursor: pointer;
    white-space: nowrap;
}

.iad-landing .iad-btn--lg {
    padding: 16px 28px;
    font-size: 15px;
}

.iad-landing .iad-btn--primary {
    background: var(--iad-accent-600);
    color: var(--iad-neutral-0);
    box-shadow: 0 6px 14px rgba(0, 139, 208, 0.25);
}

.iad-landing .iad-btn--primary:hover {
    background: var(--iad-accent-700);
    color: var(--iad-neutral-0);
    transform: translateY(-1px);
    text-decoration: none;
}

.iad-landing .iad-btn--ghost {
    background: transparent;
    color: var(--iad-text);
    border-color: var(--iad-border);
}

.iad-landing .iad-btn--ghost:hover {
    background: var(--iad-surface);
    border-color: var(--iad-neutral-400);
    color: var(--iad-text);
    text-decoration: none;
}

/* ============================================================
 * HERO
 * ============================================================ */
.iad-landing .iad-hero {
    position: relative;
    padding: var(--iad-s-24) 0 var(--iad-s-20);
    overflow: hidden;
}

.iad-landing .iad-hero__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    background:
        radial-gradient(circle at 12% 10%, rgba(0, 139, 208, 0.10), transparent 45%),
        radial-gradient(circle at 90% 0%, rgba(0, 115, 171, 0.10), transparent 50%);
    pointer-events: none;
}

.iad-landing .iad-hero__inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.05fr 1fr;
    gap: var(--iad-s-16);
    align-items: center;
}

.iad-landing .iad-hero__title {
    font-size: clamp(36px, 5vw, 56px);
    line-height: 1.05;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: var(--iad-s-5) 0;
    color: var(--iad-text);
}

.iad-landing .iad-hero__subtitle {
    color: var(--iad-text-soft);
    font-size: 18px;
    line-height: 1.65;
    margin: 0 0 var(--iad-s-8);
    max-width: 560px;
}

.iad-landing .iad-hero__cta {
    display: flex;
    gap: var(--iad-s-3);
    flex-wrap: wrap;
    margin-bottom: var(--iad-s-10);
}

.iad-landing .iad-hero__meta {
    display: flex;
    gap: var(--iad-s-6);
    flex-wrap: wrap;
    color: var(--iad-text-muted);
    font-size: 13px;
}

.iad-landing .iad-hero__meta strong {
    color: var(--iad-text);
    font-weight: 600;
}

/* Hero diagram (replaces chat mockup) */
.iad-landing .iad-hero__diagram {
    background: var(--iad-surface);
    border: 1px solid var(--iad-border);
    border-radius: var(--iad-r-2xl);
    padding: var(--iad-s-6);
    box-shadow: var(--iad-sh-lg);
    display: flex;
    flex-direction: column;
    gap: var(--iad-s-3);
}

.iad-landing .iad-hero__diagram-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--iad-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--iad-s-2);
}

.iad-landing .iad-hero__node {
    display: flex;
    align-items: center;
    gap: var(--iad-s-3);
    padding: var(--iad-s-3) var(--iad-s-4);
    background: var(--iad-surface-alt);
    border-radius: var(--iad-r-md);
    border-left: 3px solid var(--iad-accent-500);
}

.iad-landing .iad-hero__node .fa {
    font-size: 18px;
    color: var(--iad-accent-600);
    width: 28px;
}

.iad-landing .iad-hero__node strong {
    display: block;
    font-size: 14px;
    color: var(--iad-text);
    font-weight: 600;
}

.iad-landing .iad-hero__node small {
    font-size: 12px;
    color: var(--iad-text-muted);
    font-family: var(--iad-mono);
}

.iad-landing .iad-hero__arrow {
    text-align: center;
    color: var(--iad-accent-500);
    font-size: 14px;
}

/* ============================================================
 * METRICAS
 * ============================================================ */
.iad-landing .iad-metrics {
    background: var(--iad-surface);
    border-top: 1px solid var(--iad-border);
    border-bottom: 1px solid var(--iad-border);
    padding: var(--iad-s-16) 0;
}

.iad-landing .iad-metrics__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--iad-s-8);
    text-align: center;
}

.iad-landing .iad-metric__value {
    font-size: 56px;
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--iad-accent-600), var(--iad-accent-900));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: var(--iad-s-3);
}

.iad-landing .iad-metric__value span {
    font-size: 32px;
    vertical-align: top;
    margin-left: 4px;
}

.iad-landing .iad-metric__label {
    font-size: 13px;
    color: var(--iad-text-muted);
    font-weight: 500;
    max-width: 220px;
    margin: 0 auto;
}

/* ============================================================
 * ARQUITECTURA — Flow horizontal
 * ============================================================ */
.iad-landing .iad-arch-flow {
    display: grid;
    grid-template-columns: 1fr 28px 1fr 28px 1fr 28px 1fr 28px 1fr;
    align-items: stretch;
    gap: var(--iad-s-2);
}

.iad-landing .iad-arch-node {
    background: var(--iad-surface);
    border: 1px solid var(--iad-border);
    border-radius: var(--iad-r-xl);
    padding: var(--iad-s-6) var(--iad-s-5);
    display: flex;
    flex-direction: column;
    gap: var(--iad-s-2);
    transition: transform 200ms var(--iad-ease), box-shadow 200ms var(--iad-ease);
}

.iad-landing .iad-arch-node:hover {
    transform: translateY(-3px);
    box-shadow: var(--iad-sh-md);
}

.iad-landing .iad-arch-node__icon {
    width: 40px;
    height: 40px;
    border-radius: var(--iad-r-md);
    background: var(--iad-accent-50);
    color: var(--iad-accent-700);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    margin-bottom: var(--iad-s-2);
}

.iad-landing .iad-arch-node__title {
    font-size: 11px;
    font-weight: 700;
    color: var(--iad-accent-700);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.iad-landing .iad-arch-node__name {
    font-size: 16px;
    font-weight: 700;
    color: var(--iad-text);
    margin: 0;
    letter-spacing: -0.01em;
}

.iad-landing .iad-arch-node__detail {
    font-size: 12.5px;
    color: var(--iad-text-soft);
    line-height: 1.5;
    margin: 0;
}

.iad-landing .iad-arch-node__tag {
    font-family: var(--iad-mono);
    font-size: 11px;
    color: var(--iad-text-muted);
    background: var(--iad-surface-alt);
    padding: 2px 8px;
    border-radius: var(--iad-r-sm);
    align-self: flex-start;
}

.iad-landing .iad-arch-arrow {
    align-self: center;
    color: var(--iad-accent-500);
    font-size: 16px;
    text-align: center;
}

/* ============================================================
 * FEATURES (Router, MCP, performance)
 * ============================================================ */
.iad-landing .iad-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--iad-s-5);
}

.iad-landing .iad-features--3 {
    grid-template-columns: repeat(3, 1fr);
}

.iad-landing .iad-feature {
    background: var(--iad-surface);
    border: 1px solid var(--iad-border);
    border-radius: var(--iad-r-xl);
    padding: var(--iad-s-6);
    transition: transform 200ms var(--iad-ease), box-shadow 200ms var(--iad-ease),
                border-color 200ms var(--iad-ease);
}

.iad-landing .iad-feature:hover {
    transform: translateY(-2px);
    box-shadow: var(--iad-sh-md);
    border-color: var(--iad-accent-200);
}

.iad-landing .iad-feature__icon {
    width: 40px;
    height: 40px;
    border-radius: var(--iad-r-md);
    background: var(--iad-accent-50);
    color: var(--iad-accent-700);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    margin-bottom: var(--iad-s-3);
}

.iad-landing .iad-feature h3 {
    font-size: 17px;
    font-weight: 700;
    margin: 0 0 var(--iad-s-2);
    color: var(--iad-text);
    letter-spacing: -0.01em;
}

.iad-landing .iad-feature p {
    margin: 0;
    color: var(--iad-text-soft);
    font-size: 14px;
    line-height: 1.6;
}

.iad-landing .iad-feature p + p {
    margin-top: var(--iad-s-2);
}

/* ============================================================
 * MCP block (hero + evidencias)
 * ============================================================ */
.iad-landing .iad-mcp-section {
    background: var(--iad-surface);
    border-top: 1px solid var(--iad-border);
    border-bottom: 1px solid var(--iad-border);
}

.iad-landing .iad-mcp__grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--iad-s-12);
    align-items: center;
}

.iad-landing .iad-mcp__copy h2 {
    text-align: left;
}

.iad-landing .iad-mcp__copy .iad-section-lead {
    text-align: left;
}

.iad-landing .iad-mcp__list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--iad-s-3);
}

.iad-landing .iad-mcp__item {
    display: flex;
    gap: var(--iad-s-3);
    padding: var(--iad-s-4);
    background: var(--iad-bg);
    border: 1px solid var(--iad-border);
    border-radius: var(--iad-r-lg);
    align-items: flex-start;
}

.iad-landing .iad-mcp__icon {
    flex: 0 0 36px;
    height: 36px;
    border-radius: var(--iad-r-md);
    background: var(--iad-accent-50);
    color: var(--iad-accent-700);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.iad-landing .iad-mcp__item strong {
    display: block;
    font-size: 14px;
    color: var(--iad-text);
    margin-bottom: 2px;
}

.iad-landing .iad-mcp__item span {
    font-size: 12.5px;
    color: var(--iad-text-muted);
    line-height: 1.5;
}

.iad-landing .iad-mcp-domains {
    display: flex;
    flex-wrap: wrap;
    gap: var(--iad-s-2);
    margin-top: var(--iad-s-6);
}

.iad-landing .iad-mcp-domain {
    font-family: var(--iad-mono);
    font-size: 12px;
    background: var(--iad-accent-50);
    color: var(--iad-accent-700);
    padding: 4px 10px;
    border-radius: var(--iad-r-sm);
    font-weight: 500;
}

/* ============================================================
 * LAYER STACK — 5 capas de prompts
 * ============================================================ */
.iad-landing .iad-layer-stack {
    display: flex;
    flex-direction: column;
    gap: 0;
    max-width: 820px;
    margin: 0 auto;
}

.iad-landing .iad-layer {
    background: var(--iad-surface);
    border: 1px solid var(--iad-border);
    border-left-width: 4px;
    padding: var(--iad-s-5) var(--iad-s-6);
    position: relative;
    transition: background 200ms var(--iad-ease);
}

.iad-landing .iad-layer + .iad-layer {
    border-top: none;
}

.iad-landing .iad-layer:first-child {
    border-radius: var(--iad-r-lg) var(--iad-r-lg) 0 0;
}

.iad-landing .iad-layer:last-child {
    border-radius: 0 0 var(--iad-r-lg) var(--iad-r-lg);
}

.iad-landing .iad-layer:hover {
    background: var(--iad-surface-alt);
}

.iad-landing .iad-layer__num {
    position: absolute;
    right: var(--iad-s-6);
    top: 50%;
    transform: translateY(-50%);
    font-size: 56px;
    font-weight: 800;
    opacity: 0.08;
    line-height: 1;
    color: var(--iad-text);
}

.iad-landing .iad-layer__label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--iad-s-2);
    display: inline-flex;
    align-items: center;
    gap: var(--iad-s-2);
}

.iad-landing .iad-layer__label-tag {
    background: var(--iad-surface-alt);
    color: var(--iad-text-soft);
    padding: 2px 8px;
    border-radius: var(--iad-r-pill);
    font-size: 10px;
    letter-spacing: 0.06em;
}

.iad-landing .iad-layer h4 {
    font-size: 16px;
    font-weight: 700;
    margin: 0 0 var(--iad-s-1);
    color: var(--iad-text);
}

.iad-landing .iad-layer p {
    margin: 0;
    font-size: 13.5px;
    color: var(--iad-text-soft);
    line-height: 1.6;
    max-width: 80%;
}

/* Border colors per layer type */
.iad-landing .iad-layer--immutable { border-left-color: var(--iad-danger-500); }
.iad-landing .iad-layer--immutable .iad-layer__label { color: var(--iad-danger-700); }

.iad-landing .iad-layer--dynamic { border-left-color: var(--iad-warning-500); }
.iad-landing .iad-layer--dynamic .iad-layer__label { color: var(--iad-warning-700); }

.iad-landing .iad-layer--configurable { border-left-color: var(--iad-success-500); }
.iad-landing .iad-layer--configurable .iad-layer__label { color: var(--iad-success-700); }

.iad-landing .iad-layer-legend {
    display: flex;
    justify-content: center;
    gap: var(--iad-s-5);
    margin-top: var(--iad-s-6);
    flex-wrap: wrap;
    font-size: 12px;
    color: var(--iad-text-muted);
}

.iad-landing .iad-layer-legend__dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 2px;
    margin-right: 6px;
    vertical-align: middle;
}

.iad-landing .iad-layer-legend__dot--immutable { background: var(--iad-danger-500); }
.iad-landing .iad-layer-legend__dot--dynamic { background: var(--iad-warning-500); }
.iad-landing .iad-layer-legend__dot--configurable { background: var(--iad-success-500); }

/* ============================================================
 * RBAC chain (estilo badges horizontales)
 * ============================================================ */
.iad-landing .iad-rbac-section {
    background: var(--iad-surface);
    border-top: 1px solid var(--iad-border);
    border-bottom: 1px solid var(--iad-border);
}

.iad-landing .iad-rbac-chain {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: var(--iad-s-2);
    flex-wrap: wrap;
}

.iad-landing .iad-rbac-step {
    background: var(--iad-bg);
    border: 1px solid var(--iad-border);
    border-radius: var(--iad-r-lg);
    padding: var(--iad-s-5);
    text-align: center;
    min-width: 160px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    transition: transform 160ms var(--iad-ease);
}

.iad-landing .iad-rbac-step:hover { transform: translateY(-3px); }

.iad-landing .iad-rbac-step .fa {
    font-size: 22px;
    margin-bottom: var(--iad-s-2);
    color: var(--iad-accent-600);
}

.iad-landing .iad-rbac-step strong {
    font-size: 13.5px;
    color: var(--iad-text);
}

.iad-landing .iad-rbac-step span {
    font-size: 11.5px;
    color: var(--iad-text-muted);
    line-height: 1.4;
    margin-top: 2px;
}

.iad-landing .iad-rbac-sep {
    color: var(--iad-text-muted);
    font-size: 20px;
    align-self: center;
}

.iad-landing .iad-rbac-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--iad-s-4);
    margin-top: var(--iad-s-10);
}

.iad-landing .iad-rbac-detail {
    background: var(--iad-bg);
    border: 1px solid var(--iad-border);
    border-left: 3px solid var(--iad-accent-500);
    border-radius: var(--iad-r-md);
    padding: var(--iad-s-4) var(--iad-s-5);
}

.iad-landing .iad-rbac-detail strong {
    font-size: 13px;
    color: var(--iad-text);
    display: block;
    margin-bottom: 4px;
}

.iad-landing .iad-rbac-detail span {
    font-size: 13px;
    color: var(--iad-text-soft);
    line-height: 1.55;
}

.iad-landing .iad-rbac-detail code {
    font-size: 12px;
}

/* ============================================================
 * Observabilidad — 2 columnas
 * ============================================================ */
.iad-landing .iad-obs__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--iad-s-6);
}

.iad-landing .iad-obs__col {
    background: var(--iad-surface);
    border: 1px solid var(--iad-border);
    border-radius: var(--iad-r-xl);
    padding: var(--iad-s-6);
}

.iad-landing .iad-obs__col h3 {
    font-size: 16px;
    font-weight: 700;
    margin: 0 0 var(--iad-s-4);
    display: flex;
    align-items: center;
    gap: var(--iad-s-2);
    color: var(--iad-text);
}

.iad-landing .iad-obs__col h3 .fa {
    color: var(--iad-accent-600);
}

.iad-landing .iad-obs__list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--iad-s-2);
}

.iad-landing .iad-obs__list li {
    font-size: 13px;
    color: var(--iad-text-soft);
    padding: var(--iad-s-2) 0;
    border-bottom: 1px solid var(--iad-border);
    line-height: 1.5;
}

.iad-landing .iad-obs__list li:last-child { border-bottom: none; }

.iad-landing .iad-obs__list code {
    font-size: 12px;
    background: var(--iad-accent-50);
    color: var(--iad-accent-700);
}

.iad-landing .iad-obs__list em {
    font-style: normal;
    color: var(--iad-text-muted);
    font-size: 12px;
}

/* ============================================================
 * STACK
 * ============================================================ */
.iad-landing .iad-tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--iad-s-3);
}

.iad-landing .iad-tech-chip {
    background: var(--iad-surface);
    border: 1px solid var(--iad-border);
    border-radius: var(--iad-r-lg);
    padding: var(--iad-s-5);
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: border-color 160ms var(--iad-ease), transform 160ms var(--iad-ease);
}

.iad-landing .iad-tech-chip:hover {
    border-color: var(--iad-accent-200);
    transform: translateY(-2px);
}

.iad-landing .iad-tech-chip .fa {
    font-size: 20px;
    color: var(--iad-accent-600);
    margin-bottom: var(--iad-s-2);
}

.iad-landing .iad-tech-chip strong {
    font-size: 13.5px;
    color: var(--iad-text);
    font-weight: 700;
}

.iad-landing .iad-tech-chip small {
    font-size: 11.5px;
    color: var(--iad-text-muted);
}

/* ============================================================
 * CTA FINAL
 * ============================================================ */
.iad-landing .iad-cta {
    padding-bottom: var(--iad-s-24);
}

.iad-landing .iad-cta__card {
    background: linear-gradient(135deg, var(--iad-accent-900), var(--iad-accent-600));
    border-radius: var(--iad-r-2xl);
    padding: var(--iad-s-12);
    color: var(--iad-neutral-0);
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: var(--iad-s-8);
    align-items: center;
    box-shadow: var(--iad-sh-lg);
    position: relative;
    overflow: hidden;
}

.iad-landing .iad-cta__card::before {
    content: '';
    position: absolute;
    top: -60px;
    right: -60px;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.16), transparent 70%);
    pointer-events: none;
}

.iad-landing .iad-cta__copy h2 {
    margin: 0 0 var(--iad-s-3);
    font-size: clamp(24px, 3vw, 32px);
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.iad-landing .iad-cta__copy p {
    margin: 0;
    color: rgba(255, 255, 255, 0.85);
    font-size: 15px;
    line-height: 1.6;
}

.iad-landing .iad-cta__actions {
    display: flex;
    flex-direction: column;
    gap: var(--iad-s-3);
    align-items: flex-end;
    position: relative;
    z-index: 1;
}

.iad-landing .iad-cta .iad-btn--primary {
    background: var(--iad-neutral-0);
    color: var(--iad-accent-700);
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.18);
}

.iad-landing .iad-cta .iad-btn--primary:hover {
    background: var(--iad-neutral-100);
    color: var(--iad-accent-700);
}

/* ============================================================
 * RESPONSIVE
 * ============================================================ */
@media (max-width: 1024px) {
    .iad-landing .iad-hero__inner { grid-template-columns: 1fr; gap: var(--iad-s-10); }
    .iad-landing .iad-features,
    .iad-landing .iad-features--3,
    .iad-landing .iad-tech-grid { grid-template-columns: repeat(2, 1fr); }
    .iad-landing .iad-mcp__grid { grid-template-columns: 1fr; gap: var(--iad-s-8); }
    .iad-landing .iad-obs__grid { grid-template-columns: 1fr; }
    .iad-landing .iad-rbac-details { grid-template-columns: 1fr; }
    .iad-landing .iad-metrics__grid { grid-template-columns: repeat(2, 1fr); gap: var(--iad-s-6); }
    .iad-landing .iad-cta__card { grid-template-columns: 1fr; }
    .iad-landing .iad-cta__actions { align-items: stretch; }

    /* Architecture flow → stack vertical */
    .iad-landing .iad-arch-flow {
        grid-template-columns: 1fr;
        gap: var(--iad-s-3);
    }
    .iad-landing .iad-arch-arrow {
        transform: rotate(90deg);
        font-size: 20px;
    }
}

@media (max-width: 640px) {
    .iad-landing .iad-section { padding: var(--iad-s-16) 0; }
    .iad-landing .iad-hero { padding: var(--iad-s-16) 0 var(--iad-s-12); }
    .iad-landing .iad-features,
    .iad-landing .iad-features--3,
    .iad-landing .iad-tech-grid { grid-template-columns: 1fr; }
    .iad-landing .iad-mcp__list { grid-template-columns: 1fr; }
    .iad-landing .iad-metric__value { font-size: 40px; }
    .iad-landing .iad-rbac-sep { transform: rotate(90deg); }
    .iad-landing .iad-rbac-chain { flex-direction: column; }
    .iad-landing .iad-rbac-step { min-width: auto; width: 100%; }
    .iad-landing .iad-layer p { max-width: 100%; }
    .iad-landing .iad-layer__num { font-size: 38px; opacity: 0.06; }
}