/* GLOBAL */
html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    padding: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    background-color: #0f1115;
    color: #e6e6e6;
    line-height: 1.6;
    padding-top: 60px;
}

/* Idiomas */
.lang-es,
.lang-en {
    display: none;
}
.lang-es-block,
.lang-en-block {
    display: none;
}

/* Mostrar según data-lang */
body[data-lang="es"] .lang-es,
body[data-lang="es"] .lang-es-block {
    display: inline;
}
body[data-lang="es"] .lang-en,
body[data-lang="es"] .lang-en-block {
    display: none;
}

body[data-lang="en"] .lang-en,
body[data-lang="en"] .lang-en-block {
    display: inline;
}
body[data-lang="en"] .lang-es,
body[data-lang="en"] .lang-es-block {
    display: none;
}

/* Bloques */
.lang-es-block,
.lang-en-block {
    display: block;
}

/* NAVBAR */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: #131519;
    border-bottom: 1px solid #22272e;
    z-index: 1000;
    padding: 8px 0;
}

.nav-inner {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 0 15px;
}

.navbar ul {
    display: flex;
    justify-content: flex-start;
    list-style: none;
    margin: 0;
    padding: 0;
}

.navbar li {
    margin: 0 10px;
}

.navbar a {
    color: #9fa6b2;
    text-decoration: none;
    font-size: 15px;
    transition: color 0.2s;
}

.navbar a:hover {
    color: #4aa8ff;
}

/* lang buttons */
.lang-switch button {
    background: #1a1c22;
    border: 1px solid #2a2e35;
    border-radius: 20px;
    padding: 4px 10px;
    cursor: pointer;
    margin-left: 6px;
    font-size: 13px;
    color: #e6e6e6;
}

.lang-switch button.active {
    border-color: #4aa8ff;
    background: #243245;
}

/* HEADER / HERO TEXT ONLY */
header {
    padding: 60px 20px;
    background: linear-gradient(135deg, #1c1f26, #111317);
    border-bottom: 1px solid #22272e;
    text-align: center;
}

.hero-text h1 {
    font-size: 36px;
    margin: 0;
    color: #ffffff;
}

.hero-text h2 {
    margin-top: 8px;
    font-weight: 300;
    color: #9fa6b2;
}

.hero-text p {
    margin-top: 12px;
    color: #4aa8ff;
}

/* SECTIONS */
section {
    max-width: 900px;
    margin: 25px auto;
    padding: 25px;
    background: #1a1c22;
    border-radius: 12px;
    border: 1px solid #2a2e35;
    box-shadow: 0 0 20px rgba(0,0,0,0.25);
}

h3 {
    font-size: 24px;
    border-left: 4px solid #4aa8ff;
    padding-left: 10px;
    margin-top: 0;
}

/* CARDS */
.card {
    background: #15171c;
    padding: 20px;
    border-radius: 10px;
    border: 1px solid #2b2e35;
    margin-bottom: 15px;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 0 15px rgba(74,168,255,0.2);
}

.card-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 15px;
}

.card.small {
    text-align: center;
}

.card.small h4 {
    margin-bottom: 8px;
}

/* SKILLS GRID */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.skill-column {
    background: #15171c;
    padding: 20px;
    border-radius: 10px;
    border: 1px solid #2b2e35;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.skill-column:hover {
    transform: translateY(-3px);
    box-shadow: 0 0 15px rgba(74,168,255,0.2);
}

.skill-column h4 {
    margin-top: 0;
    margin-bottom: 10px;
    color: #ffffff;
}

.skill-column ul {
    list-style: disc;
    padding-left: 18px;
    margin: 0;
}

.skill-column li {
    margin-bottom: 5px;
    color: #d3d7df;
}

/* CV BUTTON */
.cv-button {
    margin-top: 15px;
}

.cv-button a {
    display: inline-block;
    padding: 10px 18px;
    background: #4aa8ff;
    color: #000;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
}

.cv-button a:hover {
    background: #6cbaff;
}

/* FOOTER */
footer {
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    color: #6c717b;
}

/* BACK TO TOP */
#backToTop {
    position: fixed;
    bottom: 25px;
    right: 25px;
    background: #4aa8ff;
    color: #000;
    padding: 10px 15px;
    border-radius: 50%;
    font-size: 20px;
    text-decoration: none;
    display: none;
}

#backToTop:hover {
    background: #6cbaff;
}

body.scrolled #backToTop {
    display: block;
}

/* ANIMATIONS */
.fade {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.7s forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* RESPONSIVE */
@media (max-width: 700px) {
    .nav-inner {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 600px) {
    section {
        padding: 20px;
        margin: 15px;
    }
}