/*
 * styles.css - Estilos Modernos y Accesibles para Portfolio
 *
 * Estructura:
 * 1. Variables CSS (:root)
 * 2. Reset Básico
 * 3. Tipografía y Accesibilidad
 * 4. Layout General (Grid/Flex)
 * 5. Componentes (Card, Timeline, Tag)
 * 6. Dark Mode (prefers-color-scheme y switch manual)
 * 7. Animaciones y Reducción de Movimiento
 * 8. Estilos de Impresión (@media print)
 */

:root {
    --color-primary: #007bff; 
    --color-secondary: #6c757d; 
    --color-text: #212529; 
    --color-background: #ffffff; 
    --color-surface: #f8f9fa; 
    --color-border: #dee2e6; 
    --color-link: var(--color-primary);
    --color-link-hover: #0056b3;

    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-xxl: 48px;

    --font-family-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 16px;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-bold: 700;

    --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --shadow-hover: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23);

    --transition-duration: 0.3s;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-primary: #4da6ff;
        --color-secondary: #adb5bd;
        --color-text: #f8f9fa;
        --color-background: #121212;
        --color-surface: #1e1e1e;
        --color-border: #3a3a3a;
        --color-link-hover: #79c0ff;
    }
}

body.dark-mode {
    --color-primary: #4da6ff;
    --color-secondary: #adb5bd;
    --color-text: #f8f9fa;
    --color-background: #121212;
    --color-surface: #1e1e1e;
    --color-border: #3a3a3a;
    --color-link-hover: #79c0ff;
}

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

body {
    font-family: var(--font-family-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    transition: background-color var(--transition-duration), color var(--transition-duration);
    min-height: 100vh;
}

h1, h2, h3 {
    line-height: 1.2;
    margin-bottom: var(--space-md);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

a {
    color: var(--color-link);
    text-decoration: none;
    transition: color var(--transition-duration);
}

a:hover, a:focus {
    color: var(--color-link-hover);
    text-decoration: underline;
}

:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--space-xs);
}

#print-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-xl);
}

section {
    padding: var(--space-xxl) 0;
    border-bottom: 1px solid var(--color-border);
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-xl);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

#main-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--space-xxl) 0;
}

.profile__photo {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: var(--space-md);
    border: 4px solid var(--color-primary);
}

.profile__name {
    font-size: 3rem;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.profile__title {
    font-size: 1.2rem;
    color: var(--color-secondary);
}

.card {
    background-color: var(--color-surface);
    padding: var(--space-lg);
    border-radius: var(--space-sm);
    box-shadow: var(--shadow-subtle);
    transition: box-shadow var(--transition-duration);
    display: flex;
    flex-direction: column;
}

.card:hover {
    box-shadow: var(--shadow-hover);
}

.card__title {
    margin-top: 0;
    margin-bottom: var(--space-sm);
    color: var(--color-primary);
}

.card__subtitle {
    color: var(--color-secondary);
    font-weight: var(--font-weight-regular);
    margin-bottom: var(--space-md);
}

.tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-sm);
    margin-right: var(--space-xs);
    margin-bottom: var(--space-xs);
    background-color: var(--color-border);
    color: var(--color-text);
    border-radius: var(--space-xs);
    font-size: 0.85rem;
    font-weight: var(--font-weight-regular);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.timeline::after {
    content: '';
    position: absolute;
    width: 2px;
    background-color: var(--color-primary);
    top: 0;
    bottom: 0;
    left: 50%;
    margin-left: -1px;
}

.timeline__item {
    padding: 10px 40px;
    position: relative;
    background-color: inherit;
    width: 50%;
}

.timeline__item--right {
    left: 50%;
}

.timeline__item::after {
    content: '';
    position: absolute;
    width: 15px;
    height: 15px;
    right: -8px;
    background-color: var(--color-surface);
    border: 2px solid var(--color-primary);
    top: 15px;
    border-radius: 50%;
    z-index: 1;
}

.timeline__item--right::after {
    left: -7px;
}

.timeline__content {
    padding: var(--space-md);
    background-color: var(--color-surface);
    position: relative;
    border-radius: var(--space-sm);
    box-shadow: var(--shadow-subtle);
}

.timeline__date {
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-sm);
}

@media screen and (max-width: 768px) {
    .timeline::after {
        left: var(--space-md);
    }

    .timeline__item {
        width: 100%;
        padding-left: var(--space-xl);
        padding-right: var(--space-md);
    }

    .timeline__item--right {
        left: 0%;
    }

    .timeline__item::after {
        left: var(--space-md) - 7px;
        right: auto;
    }
}

#contact-info {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.social-link {
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

#contact-form {
    max-width: 600px;
    margin: 0 auto;
    display: grid;
    gap: var(--space-md);
    padding: var(--space-lg);
    background-color: var(--color-surface);
    border-radius: var(--space-sm);
    box-shadow: var(--shadow-subtle);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: var(--space-xs);
    font-weight: var(--font-weight-bold);
}

.form-group input, .form-group textarea {
    padding: var(--space-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--space-xs);
    background-color: var(--color-background);
    color: var(--color-text);
    transition: border-color var(--transition-duration);
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--color-primary);
    outline: none;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.button {
    padding: var(--space-md) var(--space-lg);
    background-color: var(--color-primary);
    color: var(--color-background);
    border: none;
    border-radius: var(--space-xs);
    cursor: pointer;
    font-weight: var(--font-weight-bold);
    transition: background-color var(--transition-duration);
}

.button:hover, .button:focus {
    background-color: var(--color-link-hover);
}

.honeypot {
    display: none; 
}

#theme-switch {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 90px;
    height: 50px;
    border-radius: 100px;
    border: 2px solid var(--color-primary);
    background-color: var(--color-surface);
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-subtle);
    z-index: 100;
    transition: background-color var(--transition-duration), color var(--transition-duration);
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}

.skills__category-list {
    list-style: none;
    padding: 0;
    margin-top: var(--space-sm);
}

.skills__category-list li {
    margin-bottom: var(--space-xs);
}

.list-item {
    padding: var(--space-md) 0;
    border-bottom: 1px dashed var(--color-border);
}

.list-item:last-child {
    border-bottom: none;
}

.list-item__header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--space-xs);
}

.list-item__title {
    font-size: 1.1rem;
    color: var(--color-text);
    margin: 0;
}

.list-item__subtitle {
    color: var(--color-secondary);
    font-size: 0.9rem;
}

.list-item__date {
    font-size: 0.9rem;
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
}

.social-icon {
    width: 35px;
    height: 30px;
    vertical-align: middle;
}

.mail-icon {
    font-size: 30px;
}

@media print {
    body {
        background-color: #fff !important;
        color: #000 !important;
        font-size: 11pt;
        margin: 0;
        padding: 0;
    }

    #print-container {
        max-width: 100%;
        padding: 0;
        margin: 0;
    }

    #theme-switch,
    #contact-form,
    .social-link:not(:first-child), 
    .tags-container,
    .card:hover,
    a[href]:after { 
        display: none !important;
    }

    a {
        color: #000 !important;
        text-decoration: underline;
    }

    section {
        padding: 10pt 0;
        border-bottom: 1px solid #ccc;
        page-break-inside: avoid; 
    }

    .section-title {
        text-align: left;
        margin-bottom: 10pt;
        font-size: 14pt;
        border-bottom: 2px solid #000;
        padding-bottom: 2pt;
    }

    #main-header {
        display: block;
        text-align: left;
        padding: 0 0 10pt 0;
        border-bottom: 2px solid #000;
    }

    .profile__photo {
        display: none; 
    }

    .profile__name {
        font-size: 18pt;
        margin-bottom: 0;
        color: #000;
    }

    .profile__title {
        font-size: 12pt;
        color: #555;
    }

    .card {
        box-shadow: none !important;
        border: 1px solid #eee;
        padding: 8pt;
        margin-bottom: 5pt;
    }

    .timeline {
        max-width: 100%;
        padding: 0;
    }

    .timeline::after {
        display: none; 
    }

    .timeline__item,
    .timeline__item--right {
        width: 100%;
        padding: 0;
        margin-bottom: 10pt;
    }

    .timeline__item::after {
        display: none; 
    }

    .timeline__content {
        box-shadow: none;
        padding: 0;
        background-color: transparent;
    }

    .timeline__date {
        color: #555;
        font-weight: normal;
        font-size: 10pt;
    }

    .grid-layout {
        display: block;
    }

    #contact-info {
        justify-content: flex-start;
        flex-wrap: wrap;
        gap: 10pt;
        margin-bottom: 0;
    }

    h2, h3, h4 {
        page-break-after: avoid;
    }

    p {
        page-break-inside: avoid;
    }
}