/* === Variables de tema === */
:root {
    --bg-color: #e6f7ff;
    --text-color: #1a1a1a;
    --card-bg: #fff;
    --card-border: #000;
    --card-title-bg: #ffffff;
    --card-title-border: #000;
    --card-hover: #007bff;
    --footer-bg: #cfe8ff;
    --btn-bg: #0057b3a2;
    --btn-hover-bg: #0057b388;
    --social-bg: #fff;
    --social-color: #333;
    --social-hover-bg: #007bff;
    --social-hover-color: #fff;
}

.dark {
    --bg-color: #1a202c;
    --text-color: #e2e8f0;
    --card-bg: #2d3748;
    --card-border: #fff;
    --card-title-bg: #ffffff;
    --card-title-border: #000;
    --card-hover: #4fd1c5;
    --footer-bg: #2d3748;
    --btn-bg: #cbd5e0;
    --btn-hover-bg: #a0aec0;
    --social-bg: #2d3748;
    --social-color: #e2e8f0;
    --social-hover-bg: #4299e1;
    --social-hover-color: #fff;
}

/* === Estilos generales === */
html {
   font-family: 'Comic Sans MS', 'Kristen ITC', 'Chalkboard SE', 'Noteworthy', 'Marker Felt', 'Ink Free', Arial, Verdana, sans-serif;

}

body {    
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* === Encabezado === */
header {
    text-align: center;
    padding: 20px 0;
    background-color: var(--footer-bg);
}

header h1 {
    font-size: 2em;
    margin-bottom: 10px;
}

header p {
    font-size: 1.2em;
}

header span {
    font-style: italic;
    color: #0057b3;
}

.dark header span {
    color: #f5f236;
}

.sp {
    color: #333;
}

a {
    text-decoration: none;
    color: inherit;
}
.centra {
    text-align: center;
    padding: 10px 0;
}

/* === Sección de tarjetas === */
.projects {
    padding: 40px 0;
}

.cards {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    padding-top: 20px;
}

.card {
    flex: 0 0 calc(20% - 16px); /* 5 por fila */
    min-width: 250px;
    background-color: var(--card-bg);
    border: 6px solid var(--card-border);
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1), 0 10px 20px rgba(0, 0, 0, 0.2);
    padding: 20px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.2), 0 15px 40px rgba(0, 0, 0, 0.3);
}

.card a {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
}

.card-title-container {
    background-color: var(--card-title-bg);
    border: 3px solid var(--card-title-border);
    border-radius: 10px;
    padding: 10px;
    margin-bottom: 10px;
    transition: background-color 0.3s, border-color 0.3s;
}

.card h2 {
    font-size: 1.4em;
    margin: 0;
    text-align: center;
}

.card p {
    font-size: 1.2em;
    font-weight: bold;
    font-family: 'Comic Sans MS', 'Kristen ITC', 'Chalkboard SE', 'Noteworthy', 'Marker Felt', 'Ink Free', Arial, Verdana, sans-serif;
}

.about-list {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

.about-list li::before {
    content: "🤖";
    margin-right: 8px;
    color: #0ff;
    font-size: 1.2em;
}

.lavender { background-color: #E6E6FA; }
.lightblue { background-color: #ADD8E6; }
.lime { background-color: #00FF00; }
.darkviolet { background-color: #9400D3; }
.red { background-color: #FF0000; }
.hotpink { background-color: #FF69B4; }
.olivedrab { background-color: #6b8e23;}
.gold { background-color: #Ffd700;}

/* En modo oscuro, sobreescribe colores personalizados */
.dark .lavender { background-color: #5c5c9bd3; }
.dark .lightblue { background-color: #5DADE2; }
.dark .lime { background-color: #43af43; }
.dark .darkviolet { background-color: #6a0dad; }
.dark .red { background-color: #d62828; }
.dark .hotpink { background-color: #bd5681; }
.olivedrab { background-color: #6b8e23;}
.dark .gold { background-color: #a58c01;}

/* === Sección de texto adicional === */
.additional-text {
    padding: 40px 0;
    text-align: center;
    font-family: 'Comic Sans MS', 'Kristen ITC', 'Chalkboard SE', 'Noteworthy', 'Marker Felt', 'Ink Free', Arial, Verdana, sans-serif;
    color: var(--text-color);
}

/* === Sección de redes sociales === */
.social-links {
    padding: 40px 0;
    text-align: center;
}

.social-link {
    display: inline-block;
    margin: 10px 10px;
    /*padding: 10px 20px;
    border-radius: 50%;
    background-color: var(--social-bg);
    color: var(--social-color);*/
    text-decoration: none;
    font-size: 1.2em;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/*.social-link:hover {
    background-color: var(--social-hover-bg);
    color: var(--social-hover-color);
}*/

.social-icon-img {
    width: 2em; /* Define el tamaño */
    height: 2em;
    transition: filter 0.3s ease;
    padding-top: 0.5em;
}


/* === Pie de página === */
footer {
    padding: 20px 0;
    text-align: center;
    background-color: var(--footer-bg);
    font-family: 'Comic Sans MS', 'Kristen ITC', 'Chalkboard SE', 'Noteworthy', 'Marker Felt', 'Ink Free', Arial, Verdana, sans-serif;
}

/* === Botón de scroll hacia arriba === */
#scroll-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #4299e1c5;
    color: rgb(255, 255, 255);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 24px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

#scroll-to-top:hover {
    background-color: var(--btn-hover-bg);
}

/* === Botón toggle theme === */
#theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    background-color: var(--btn-bg);
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 24px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.dark #theme-toggle {
    background-color: #63708665;
    color: #e2e8f0;
}

#theme-toggle:hover {
    background-color: var(--btn-hover-bg);
}

.dark #theme-toggle:hover {
    background-color: #4a5568be;
} 


/* Añade esto AL FINAL de tu styles.css */
#scroll-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #4299e1c5;
    color: rgb(255, 255, 255);
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 24px;
    cursor: pointer;
    transition: background-color 0.3s ease;
    z-index: 9999; /* IMPORTANTE: Asegura que esté por encima */
    display: none; /* Se mostrará con JavaScript */
}

#scroll-to-top:hover {
    background-color: var(--btn-hover-bg);
}

/* Navegación por teclado - Estilos :focus universales */
a:focus,
button:focus {
  outline: 3px solid #4fd1c5 !important;
  outline-offset: 2px !important;
  border-radius: 4px;
  box-shadow: 0 0 0 4px rgba(79, 209, 197, 0.3);
}

/* Modo oscuro - ajuste de contraste */
.dark a:focus,
.dark button:focus {
  outline-color: #f5f236 !important;
  box-shadow: 0 0 0 4px rgba(245, 242, 54, 0.3);
}

/* Asegurar visibilidad de botones fijos */
#theme-toggle,
#scroll-to-top {
    z-index: 9999;
    position: fixed;
}

#theme-toggle {
    top: 20px;
    right: 20px;
}

#scroll-to-top {
    bottom: 20px;
    right: 20px;
}