/* Reset y estilos base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-primary: #0066cc;
    --color-secondary: #003d7a;
    --color-text: #333;
    --color-text-light: #666;
    --color-bg: #ffffff;
    --color-bg-light: #f5f5f5;
    --color-border: #e0e0e0;
    --max-width: 900px;
    --spacing-unit: 1.5rem;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    font-size: 16px;
}

/* Header */
header {
    background-color: var(--color-secondary);
    color: white;
    padding: 2rem 0;
    border-bottom: 4px solid var(--color-primary);
}

header .container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

header h1 {
    font-size: 1.8rem;
    font-weight: 600;
    letter-spacing: -0.5px;
}

header p {
    margin-top: 0.5rem;
    font-size: 0.95rem;
    opacity: 0.9;
}

/* Main content */
main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 3rem 2rem;
    min-height: calc(100vh - 300px);
}

/* Typography */
h1,
h2,
h3,
h4 {
    color: var(--color-secondary);
    margin-top: 2rem;
    margin-bottom: 1rem;
    line-height: 1.3;
}

h1 {
    font-size: 2rem;
    margin-top: 0;
}

h2 {
    font-size: 1.6rem;
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 0.5rem;
}

h3 {
    font-size: 1.3rem;
    color: var(--color-primary);
}

h4 {
    font-size: 1.1rem;
}

p {
    margin-bottom: 1.2rem;
}

/* Links */
a {
    color: var(--color-primary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s;
}

a:hover {
    border-bottom-color: var(--color-primary);
}

/* Navigation */
.nav-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.nav-card {
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-primary);
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.nav-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.nav-card h3 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
}

.nav-card p {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* Breadcrumb */
.breadcrumb {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 2rem;
}

.breadcrumb a {
    color: var(--color-primary);
}

/* Content sections */
.content-section {
    margin: 2.5rem 0;
}

.content-section:first-of-type {
    margin-top: 0;
}

/* Code blocks */
code {
    background: var(--color-bg-light);
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

pre {
    background: var(--color-bg-light);
    border-left: 4px solid var(--color-primary);
    padding: 1rem;
    overflow-x: auto;
    margin: 1.5rem 0;
}

pre code {
    background: none;
    padding: 0;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

th,
td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

th {
    background: var(--color-bg-light);
    font-weight: 600;
    color: var(--color-secondary);
}

/* Info boxes */
.info-box {
    background: #e3f2fd;
    border-left: 4px solid #2196f3;
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
}

.warning-box {
    background: #fff3e0;
    border-left: 4px solid #ff9800;
    padding: 1rem 1.5rem;
    margin: 1.5rem 0;
}

/* Subpages list */
.subpages-list {
    list-style: none;
    margin: 2rem 0;
}

.subpages-list li {
    margin-bottom: 1rem;
}

.subpages-list a {
    display: block;
    padding: 1rem;
    background: var(--color-bg-light);
    border-left: 3px solid var(--color-primary);
    transition: background 0.2s, border-left-width 0.2s;
}

.subpages-list a:hover {
    background: #e8e8e8;
    border-left-width: 6px;
}

/* Footer */
footer {
    background: var(--color-bg-light);
    border-top: 1px solid var(--color-border);
    padding: 2rem 0;
    margin-top: 4rem;
}

footer .container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* Responsive */

/* Image styling */
.tech-img-float {
    float: right;
    width: 40%;
    max-width: 400px;
    margin: 0 0 1.5rem 1.5rem;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.tech-img-float-left {
    float: left;
    width: 40%;
    max-width: 400px;
    margin: 0 1.5rem 1.5rem 0;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
    header h1 {
        font-size: 1.5rem;
    }

    main {
        padding: 2rem 1rem;
    }

    h1 {
        font-size: 1.7rem;
    }

    h2 {
        font-size: 1.4rem;
    }

    .nav-links {
        grid-template-columns: 1fr;
    }

    .tech-img-float,
    .tech-img-float-left {
        float: none;
        width: 100%;
        max-width: 100%;
        margin: 1.5rem 0;
    }
}