@font-face {
    font-family: 'Smythe';
    src: url('fonts/Smythe-Regular.ttf') format('truetype');
}

/* =========================
   VARIABLES
   ========================= */

:root {
    --color-principal: #347773;
    --color-fondo: #438a8a;
    --color-texto: #333;
}

/* =========================
   BODY Y FONDO
   ========================= */

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    color: var(--color-texto);

    background: linear-gradient(
        -45deg,
        #329c9c,
        #5bb3ad,
        #2f8a8a,
        #7cc7c2
    );
    background-size: 400% 400%;
    animation: fondoAnimado 12s ease infinite, fadeIn 0.8s ease-in;
}

@keyframes fondoAnimado {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* =========================
   HEADER
   ========================= */

header {
    background-color: var(--color-principal);
    color: #fff;
    padding: 1.25rem;
    text-align: center;
}

/* =========================
   SECCIONES
   ========================= */

section {
    padding: 1.25rem;
    margin: 0.625rem;
    background: rgb(190, 195, 196);
    border-radius: 0.5rem;
}

h1, h2, h3 {
    margin: 0 0 0.625rem 0;
}

ul {
    padding-left: 1.25rem;
}

/* =========================
   FORMULARIO
   ========================= */

form input,
form textarea {
    display: block;
    margin-bottom: 0.625rem;
    padding: 0.5rem;
    width: 15.625rem;
}

button {
    background-color: var(--color-principal);
    color: white;
    border: none;
    padding: 0.625rem;
    cursor: pointer;
    border-radius: 0.3125rem;
    transition: transform 0.2s, background-color 0.2s;
}

button:hover {
    background-color: #0b4744;
    transform: scale(1.05);
}

/* =========================
   TARJETAS DE HABILIDADES
   ========================= */

.skills-container {
    display: flex;
    gap: 2.5rem;
    justify-content: center;
    margin-top: 1.25rem;
}

.card {
    position: relative;
    background-color: rgb(44, 121, 117);
    border: 0.125rem solid var(--color-principal);
    border-radius: 0.625rem;
    padding: 0.9375rem;
    width: 12.5rem;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        120deg,
        transparent,
        rgba(255,255,255,0.4),
        transparent
    );
}

.card:hover::before {
    left: 100%;
    transition: 0.6s;
}

.card h4 {
    margin-top: 0;
    color: white;
}

.card:hover {
    transform: translateY(-0.5rem) scale(1.02);
    box-shadow: 0 0 0.9375rem rgba(0,0,0,0.3);
}

/* =========================
   FOTO DE PERFIL
   ========================= */

.photo-perfil {
    width: clamp(4rem, 20vw, 7rem);
    height: clamp(4rem, 20vw, 7rem);
    border-radius: 50%;
    object-fit: cover;
    border: 0.25rem solid white;
    margin-bottom: 0.625rem;
    transition: transform 0.3s;
}


.photo-perfil:hover {
    transform: scale(1.05);
}

/* =========================
   BOTÓN VOLVER ARRIBA
   ========================= */

.btn-back {
    position: fixed;
    bottom: 1.25rem;
    right: 1.25rem;
    background-color: var(--color-principal);
    color: white;
    border: none;
    padding: 0.75rem 1rem;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.125rem;
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.3);
    z-index: 1000;
    transition: transform 0.2s, background-color 0.2s;
}

.btn-back:hover {
    background-color: #0b4744;
    transform: scale(1.1);
}

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

@media (max-width: 37.5rem) {

    .btn-back {
        bottom: 0.625rem;
        right: 0.625rem;
        padding: 0.625rem 0.875rem;
    }

    .skills-container {
        flex-direction: column;
        align-items: center;
    }

    .card {
        width: 90%;
    }

    form input,
    form textarea {
        width: 100%;
    }
}