:root {
    --primary-color: #0f172a;
    /* Deep, sober navy, almost black for CIO feel */
    --primary-light: #1e3a8a;
    /* Serious corporate blue */
    --secondary-bg: #f8fafc;
    /* Muted, very subtle gray background */
    --text-main: #1e293b;
    /* Slate dark for main text */
    --text-muted: #475569;
    /* Slate gray for secondary text */
    --border-color: #cbd5e1;
    /* Defined but light border */
    --white: #ffffff;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3.5rem;
    --spacing-xl: 5rem;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--text-main);
    line-height: 1.65;
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 900px;
    /* Kept narrow for document readability */
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header & Typography */
h1,
h2,
h3 {
    font-weight: 600;
    color: var(--primary-color);
    line-height: 1.3;
}

h1 {
    font-size: 2.15rem;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
}

h2 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.section-intro {
    font-size: 1rem;
    color: var(--text-muted);
    margin-top: -1.25rem;
    margin-bottom: var(--spacing-md);
}

p {
    font-size: 1.05rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-main);
}

/* Executive Meta Labels in Hero */
.executive-meta {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.meta-tag {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    padding: 0.4rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    display: inline-block;
    width: fit-content;
}

.meta-tag.var-status {
    background-color: #e0f2fe;
    /* Light subtle blue for status */
    border-color: #bae6fd;
    color: #0369a1;
}

/* Navbar */
.navbar {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.logo {
    font-weight: 700;
    font-size: 1rem;
    color: var(--primary-color);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 1.25rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: var(--primary-light);
}

/* Section Utilities */
.section {
    padding: var(--spacing-lg) 0;
}

.bg-light {
    background-color: var(--secondary-bg);
    border-top: 1px solid #f1f5f9;
    border-bottom: 1px solid #f1f5f9;
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0 var(--spacing-lg) 0;
}

.hero .subtitle {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 800px;
    font-weight: 400;
    line-height: 1.6;
}

.content-text {
    max-width: 800px;
}

/* Grid Lists */
.grid-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.list-item {
    background-color: var(--white);
    border-left: 3px solid var(--primary-light);
    padding: 1rem 1.25rem;
    font-size: 0.95rem;
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--primary-light);
}

.bg-light .list-item {
    background-color: var(--white);
}

/* Vertical Architecture Diagram */
.vertical-architecture {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    padding: 3rem 1.5rem;
    max-width: 600px;
    margin: 0 auto;
}

.arch-tier {
    width: 100%;
    padding: 1.25rem 1.5rem;
    text-align: center;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.03);
    color: var(--primary-color);
}

.tier-presentation {
    background-color: var(--white);
    border-top: 4px solid var(--primary-light);
}

.tier-core {
    background-color: #f1f5f9;
    border-left: 4px solid var(--primary-light);
}

.tier-data {
    background-color: #f8fafc;
    border-left: 4px solid #64748b;
}

.tier-security {
    background-color: var(--white);
    border: 1px dashed var(--text-muted);
}

.tier-integration {
    background-color: #e2e8f0;
    border-left: 4px solid var(--primary-color);
}

.vertical-architecture .arch-arrow {
    color: var(--text-muted);
    font-size: 1.25rem;
    padding: 0.2rem 0;
}

/* Process Flow */
.process-flow {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    max-width: 600px;
}

.flow-step {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    color: var(--primary-color);
    padding: 0.85rem 1.25rem;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    display: flex;
    align-items: center;
}

.bg-light .flow-step {
    background-color: var(--white);
}

.flow-step::before {
    content: "■";
    color: var(--primary-light);
    margin-right: 1rem;
    font-size: 0.8rem;
}

/* Beneficios Grid */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

.benefit-card {
    background-color: #f8fafc;
    border: 1px solid var(--border-color);
    padding: 1.25rem;
    font-size: 0.95rem;
    color: var(--text-main);
    display: flex;
    align-items: flex-start;
}

.benefit-card::before {
    content: "✓";
    color: var(--primary-light);
    font-weight: bold;
    margin-right: 0.75rem;
    font-size: 1.1rem;
}

/* Formal Lists */
.formal-list {
    list-style-position: outside;
    list-style-type: none;
    margin-left: 1rem;
}

.formal-list li {
    margin-bottom: 0.75rem;
    color: var(--text-main);
    font-size: 1rem;
    position: relative;
    padding-left: 1.5rem;
}

.formal-list li::before {
    content: "—";
    position: absolute;
    left: 0;
    color: var(--primary-light);
    font-weight: bold;
}

/* Timeline */
.timeline {
    display: flex;
    flex-direction: column;
    gap: 0;
    border-left: 2px solid var(--border-color);
    margin-left: 1rem;
    padding-left: 1.5rem;
}

.timeline-phase {
    position: relative;
    padding: 0.75rem 0;
    border-bottom: 1px solid #f1f5f9;
}

.timeline-phase:last-child {
    border-bottom: none;
}

.timeline-phase::before {
    content: "";
    position: absolute;
    left: -1.9rem;
    top: 1.05rem;
    width: 0.7rem;
    height: 0.7rem;
    background-color: var(--primary-light);
    border-radius: 50%;
}

.phase-number {
    display: block;
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.95rem;
    letter-spacing: 0.02em;
}

/* Governance Grid */
.governance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
}

.gov-card {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
}

.gov-card-full {
    grid-column: 1 / -1;
    background-color: var(--secondary-bg);
}

.gov-role {
    font-size: 0.95rem;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
    border-bottom: none;
    padding-bottom: 0;
}

.gov-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0;
}

/* Tech Grid */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.tech-card {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    padding: 1.25rem;
}

.bg-light .tech-card {
    background-color: var(--white);
}

.tech-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
}

.tech-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary-color);
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    background-color: var(--white);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer p {
    font-size: 0.9rem;
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.footer-disclaimer {
    color: var(--text-muted) !important;
    font-style: italic;
    font-size: 0.85rem !important;
    margin-bottom: 1rem !important;
}

.footer-year {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1rem;
    }

    .nav-links {
        display: none;
    }

    .timeline {
        margin-left: 0.5rem;
        padding-left: 1rem;
    }

    .timeline-phase::before {
        left: -1.35rem;
    }
}