@page {
    size: A4;
    margin: 15mm;
}

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

body {
    font-family: 'Roboto', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #2c3e50;
    background: white;
    padding: 0 var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Asap Condensed', 'Arial Narrow', sans-serif;
}

/* Irina Ichim Brand Colors */
:root {
    /* Colores principales */
    --primary: #ea4f33;
    --secondary: #4737bb;
    --accent: #6c63ff;
    --dark: #2a2170;
    --light: #fdfdfd;
    --warning: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;

    /* Project colors */
    --project-blue: #3b82f6;
    --project-green: #22c55e;
    --project-purple: #a855f7;
    --project-yellow: #eab308;
    --project-orange: #f97316;
    --project-red: #ef4444;
    --project-brown: #a16207;

    /* Sombras */
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.15);
    --shadow-medium: 0 8px 20px rgba(0, 0, 0, 0.15);
    --shadow-light: 0 5px 15px rgba(0, 0, 0, 0.1);
    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.1);

    /* Border radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.8rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Transiciones */
    --transition-fast: 0.3s ease;
    --transition-smooth: 0.6s cubic-bezier(0.33, 0.0, 0.22, 1);
}

/* Header */
.header {
    background: linear-gradient(135deg, var(--secondary) 0%, var(--accent) 100%);
    color: white;
    padding: var(--spacing-lg);
    text-align: center;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-soft);
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    letter-spacing: 1px;
}

.header .subtitle {
    font-size: 1.2rem;
    opacity: 0.95;
    font-weight: 300;
}

/* Table of Contents */
.toc {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--primary);
}

.toc h2 {
    color: var(--dark);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.toc ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xs);
}

.toc li {
    padding: var(--spacing-xs);
    font-size: 0.95rem;
}

.toc li::before {
    content: ">> ";
    color: var(--primary);
    font-weight: bold;
}

.toc a {
    color: var(--dark);
    text-decoration: none;
    transition: var(--transition-fast);
}

.toc a:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* Sections */
.section {
    margin-bottom: var(--spacing-xl);
    page-break-inside: avoid;
}

.section-title {
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-medium);
}

.subsection {
    margin-bottom: var(--spacing-lg);
}

.subsection-title {
    color: var(--dark);
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 2px solid var(--accent);
    font-weight: 600;
}

/* Cards */
.card {
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-card);
    page-break-inside: avoid;
}

.card-header {
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.card h3 {
    color: var(--dark);
    margin-bottom: var(--spacing-sm);
}

.card h4 {
    color: var(--secondary);
    margin-bottom: var(--spacing-xs);
}

/* Project Cards */
.project-card {
    border-left: 5px solid var(--secondary);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.project-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.project-card.blue {
    border-left-color: var(--project-blue);
}

.project-card.blue .card-header {
    color: var(--project-blue);
}

.project-card.green {
    border-left-color: var(--project-green);
}

.project-card.green .card-header {
    color: var(--project-green);
}

.project-card.purple {
    border-left-color: var(--project-purple);
}

.project-card.purple .card-header {
    color: var(--project-purple);
}

.project-card.yellow {
    border-left-color: var(--project-yellow);
}

.project-card.yellow .card-header {
    color: var(--project-yellow);
}

.project-card.orange {
    border-left-color: var(--project-orange);
}

.project-card.orange .card-header {
    color: var(--project-orange);
}

.project-card.red {
    border-left-color: var(--project-red);
}

.project-card.red .card-header {
    color: var(--project-red);
}

.project-card.brown {
    border-left-color: var(--project-brown);
}

.project-card.brown .card-header {
    color: var(--project-brown);
}

/* Code blocks */
pre {
    background: #2d2d2d;
    color: #f8f8f2;
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: var(--spacing-sm) 0;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    border-left: 4px solid var(--primary);
}

code {
    background: #f4f4f4;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--danger);
}

/* Keyboard shortcuts */
kbd {
    background: linear-gradient(180deg, #f5f5f5, #e0e0e0);
    border: 1px solid #ccc;
    border-radius: 4px;
    box-shadow: 0 2px 0 #999;
    color: #333;
    display: inline-block;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.85em;
    padding: 2px 6px;
    margin: 0 2px;
}

/* Lists */
ul, ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

li {
    margin-bottom: var(--spacing-xs);
}

/* Checklist */
.checklist {
    list-style: none;
    margin-left: 0;
}

.checklist li {
    padding-left: var(--spacing-lg);
    position: relative;
}

.checklist li::before {
    content: "[ ]";
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
    font-family: monospace;
}

/* Alert boxes */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin: var(--spacing-md) 0;
    border-left: 4px solid;
}

.alert-info {
    background: #e3f2fd;
    border-color: #2196f3;
    color: #1565c0;
}

.alert-warning {
    background: #fff3cd;
    border-color: var(--warning);
    color: #856404;
}

.alert-danger {
    background: #fee;
    border-color: var(--danger);
    color: #c62828;
}

.alert-success {
    background: #e8f5e9;
    border-color: var(--success);
    color: #2e7d32;
}

.alert h3, .alert h4 {
    margin-bottom: var(--spacing-sm);
}

.alert ul {
    margin-top: var(--spacing-sm);
}

/* Grid layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

/* Footer */
.footer {
    background: linear-gradient(135deg, var(--dark) 0%, var(--secondary) 100%);
    color: white;
    padding: var(--spacing-lg);
    text-align: center;
    border-radius: var(--radius-md);
    margin-top: var(--spacing-xl);
}

.footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

/* Utility classes */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }

/* Links */
a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* Page breaks for print */
.page-break {
    page-break-after: always;
}

/* Strong emphasis */
strong {
    color: var(--dark);
    font-weight: 600;
}

/* Emphasis */
em {
    color: var(--primary);
    font-style: italic;
}

/* Scroll to top button */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    text-align: center;
    line-height: 50px;
    font-size: 1.8rem;
    border-radius: 50%;
    text-decoration: none;
    box-shadow: var(--shadow-medium);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: 1000;
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-soft);
    text-decoration: none;
}

/* Scroll suave para HTML */
html {
    scroll-behavior: smooth;
}

/* Responsive */
@media (max-width: 768px) {
    .toc ul {
        grid-template-columns: 1fr;
    }

    .grid-2 {
        grid-template-columns: 1fr;
    }

    .header h1 {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.4rem;
    }
}

/* Print styles */
@media print {
    .scroll-to-top {
        display: none;
    }

    .header {
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .section-title {
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }

    .alert {
        -webkit-print-color-adjust: exact;
        print-color-adjust: exact;
    }
}