/* ============================================
   SENIOR VERSION - CSS ACCESIBLE PARA MAYORES
   ============================================ */

:root {
    --font-size-base: 18px;
    --font-size-large: 24px;
    --font-size-xlarge: 32px;
    --font-size-heading: 36px;
    --color-primary: #0066CC;
    --color-secondary: #FF9900;
    --color-text: #000000;
    --color-bg: #FFFFFF;
    --color-contrast-bg: #F5F5F5;
    --color-accent: #006633;
    --color-error: #CC0000;
    --line-height: 1.8;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Arial", "Helvetica Neue", sans-serif;
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background-color: var(--color-bg);
}

/* ============================================
   HEADER - ENCABEZADO
   ============================================ */

.header-senior {
    background-color: var(--color-primary);
    color: white;
    padding: 30px 20px;
    text-align: center;
    border-bottom: 5px solid var(--color-secondary);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
}

.logo-section {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.logo-image {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 3px solid white;
    display: block;
}

.header-senior h1 {
    font-size: var(--font-size-heading);
    font-weight: bold;
    margin: 10px 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.tagline {
    font-size: var(--font-size-large);
    font-weight: 500;
    margin-top: 10px;
}

/* ============================================
   NAVIGATION - NAVEGACIÓN
   ============================================ */

.navbar-senior {
    background-color: var(--color-contrast-bg);
    padding: 20px;
    border-top: 3px solid var(--color-primary);
    border-bottom: 3px solid var(--color-secondary);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.nav-menu-senior {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    list-style: none;
    gap: 15px;
    margin-bottom: 20px;
}

.nav-link {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--color-primary);
    color: white;
    text-decoration: none;
    font-size: var(--font-size-large);
    font-weight: bold;
    border-radius: 8px;
    border: 3px solid var(--color-primary);
    transition: all 0.3s ease;
    cursor: pointer;
}

.nav-link:hover,
.nav-link:focus {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    transform: scale(1.05);
    outline: none;
}

.nav-link.active {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
}

/* Top menu with font controls */
.top-menu-senior {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
}

.btn-increase-font,
.btn-decrease-font,
.btn-reset-font {
    padding: 12px 20px;
    font-size: var(--font-size-large);
    font-weight: bold;
    background-color: var(--color-secondary);
    color: white;
    border: 3px solid var(--color-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-increase-font:hover,
.btn-decrease-font:hover,
.btn-reset-font:hover,
.btn-increase-font:focus,
.btn-decrease-font:focus,
.btn-reset-font:focus {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    transform: scale(1.05);
    outline: 3px solid var(--color-accent);
}

/* ============================================
   MAIN CONTENT
   ============================================ */

main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Hero Section */
.hero-senior {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: white;
    padding: 60px 30px;
    border-radius: 15px;
    margin-bottom: 50px;
    text-align: center;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

.hero-content h2 {
    font-size: var(--font-size-xlarge);
    margin-bottom: 20px;
    font-weight: bold;
}

.intro-text {
    font-size: var(--font-size-large);
    line-height: var(--line-height);
    max-width: 800px;
    margin: 0 auto;
}

/* ============================================
   CARDS SECTION
   ============================================ */

.sections-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.card-senior {
    background-color: var(--color-contrast-bg);
    padding: 30px;
    border-radius: 12px;
    border: 4px solid var(--color-primary);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.card-senior:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    border-color: var(--color-secondary);
}

.card-senior h3 {
    font-size: var(--font-size-large);
    color: var(--color-primary);
    margin-bottom: 15px;
    font-weight: bold;
}

.card-senior p {
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    margin-bottom: 25px;
    flex-grow: 1;
    color: var(--color-text);
}

.btn-senior {
    display: inline-block;
    padding: 15px 30px;
    background-color: var(--color-primary);
    color: white;
    text-decoration: none;
    font-size: var(--font-size-large);
    font-weight: bold;
    border-radius: 8px;
    border: 3px solid var(--color-primary);
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
    align-self: flex-start;
}

.btn-senior:hover,
.btn-senior:focus {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    transform: scale(1.05);
    outline: 3px solid var(--color-accent);
}

/* ============================================
   ACCESSIBILITY INFO SECTION
   ============================================ */

.accessibility-info {
    background-color: #FFFACD;
    border: 5px solid var(--color-secondary);
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 40px;
}

.accessibility-info h2 {
    font-size: var(--font-size-large);
    color: var(--color-primary);
    margin-bottom: 20px;
    font-weight: bold;
}

.accessibility-info ul {
    list-style: none;
    padding: 0;
}

.accessibility-info li {
    font-size: var(--font-size-large);
    padding: 12px 0;
    border-bottom: 2px solid var(--color-secondary);
    color: var(--color-text);
}

.accessibility-info li:last-child {
    border-bottom: none;
}

/* ============================================
   FOOTER
   ============================================ */

.footer-senior {
    background-color: var(--color-primary);
    color: white;
    text-align: center;
    padding: 40px 20px;
    border-top: 5px solid var(--color-secondary);
    margin-top: 50px;
}

.footer-senior p {
    font-size: var(--font-size-large);
    margin: 10px 0;
    line-height: var(--line-height);
}

.footer-senior a {
    display: inline-block;
    margin-top: 15px;
    padding: 12px 24px;
    background-color: var(--color-secondary);
    color: var(--color-text);
    text-decoration: none;
    font-size: var(--font-size-large);
    font-weight: bold;
    border-radius: 8px;
    border: 3px solid var(--color-secondary);
    transition: all 0.3s ease;
}

.footer-senior a:hover,
.footer-senior a:focus {
    background-color: white;
    border-color: white;
    transform: scale(1.05);
    outline: 3px solid white;
}

/* ============================================
   FOCUS STATES - ACCESIBILIDAD DEL TECLADO
   ============================================ */

:focus-visible {
    outline: 4px solid var(--color-accent);
    outline-offset: 2px;
}

a:focus,
button:focus {
    outline: 4px solid var(--color-accent);
    outline-offset: 2px;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
    .header-senior h1 {
        font-size: 28px;
    }

    .nav-menu-senior {
        flex-direction: row;
        gap: 8px;
        justify-content: center;
        flex-wrap: wrap;
    }

    .nav-link {
        flex: 0 1 auto;
        padding: 10px 12px;
        font-size: 16px;
        min-width: 90px;
        text-align: center;
    }

    .hero-senior {
        padding: 40px 20px;
    }

    .hero-content h2 {
        font-size: 28px;
    }

    .sections-container {
        grid-template-columns: 1fr;
    }

    .card-senior {
        padding: 20px;
    }
}

/* ============================================
   VERSION SELECTOR
   ============================================ */

.version-selector {
    background-color: #FFFACD;
    border: 3px solid var(--color-secondary);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}

.version-selector p {
    font-size: var(--font-size-large);
    margin-bottom: 12px;
    font-weight: bold;
    color: var(--color-primary);
}

.version-links {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.version-btn {
    padding: 10px 16px;
    font-size: var(--font-size-base);
    background-color: var(--color-primary);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    border: 2px solid var(--color-primary);
    transition: all 0.3s ease;
    cursor: pointer;
    font-weight: bold;
}

.version-btn:hover,
.version-btn:focus {
    background-color: var(--color-secondary);
    border-color: var(--color-secondary);
    transform: scale(1.05);
}

.version-btn.active {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    font-weight: bold;
}

/* ============================================
   DYNAMIC FONT SIZE CLASSES
   ============================================ */

body.size-small {
    --font-size-base: 16px;
    --font-size-large: 20px;
    --font-size-xlarge: 28px;
    --font-size-heading: 32px;
}

body.size-normal {
    --font-size-base: 18px;
    --font-size-large: 24px;
    --font-size-xlarge: 32px;
    --font-size-heading: 36px;
}

body.size-large {
    --font-size-base: 22px;
    --font-size-large: 28px;
    --font-size-xlarge: 38px;
    --font-size-heading: 42px;
}

body.size-xlarge {
    --font-size-base: 26px;
    --font-size-large: 34px;
    --font-size-xlarge: 46px;
    --font-size-heading: 52px;
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    .navbar-senior,
    .footer-senior {
        display: none;
    }

    body {
        font-size: 14pt;
    }
}