/*=============== VARIABLES CSS ===============*/
:root {
    --header-height: 4rem; /* Slightly larger header */

    /*========== Colors ==========*/
    --primary-hue: 240; /* Blue/Purple base */
    --first-color: hsl(var(--primary-hue), 70%, 60%); /* Vibrant accent blue */
    --first-color-alt: hsl(var(--primary-hue), 70%, 50%); /* Darker accent for hover */
    --title-color: hsl(0, 0%, 95%); /* Near white for titles */
    --text-color: hsl(0, 0%, 75%); /* Light gray for general text */
    --text-color-light: hsl(0, 0%, 50%); /* Medium gray for subtle text */

    /* Darker solid background with subtle gradient for containers */
    --body-color: hsl(240, 8%, 12%); /* Deep dark blue-grey */
    --container-color: linear-gradient(145deg, hsl(240, 8%, 18%) 0%, hsl(240, 8%, 22%) 100%); /* Slightly lighter, subtle gradient for cards/containers */

    /*========== Font and typography ==========*/
    --heading-font: 'Montserrat', sans-serif; /* Modern, bold font for headings */
    --body-font: 'Open Sans', sans-serif; /* Clean, readable font for body text */

    --biggest-font-size: 2.5rem; /* Larger for main titles */
    --h1-font-size: 2rem;
    --h2-font-size: 1.75rem;
    --h3-font-size: 1.25rem;
    --normal-font-size: 1rem;
    --small-font-size: .875rem;
    --smaller-font-size: .75rem;

    /*========== Font weight ==========*/
    --font-regular: 400;
    --font-medium: 500;
    --font-semi-bold: 600;
    --font-bold: 700;
    --font-black: 900;

    /*========== Margenes Bottom ==========*/
    --mb-0-25: .25rem;
    --mb-0-5: .5rem;
    --mb-0-75: .75rem;
    --mb-1: 1rem;
    --mb-1-5: 1.5rem;
    --mb-2: 2rem;
    --mb-2-5: 2.5rem;
    --mb-3: 3rem;

    /*========== z index ==========*/
    --z-tooltip: 10;
    --z-fixed: 100;

    /*========== Border Radius ==========*/
    --border-radius-small: .25rem;
    --border-radius-medium: .5rem;
    --border-radius-large: 1rem;
}

/* Responsive typography */
@media screen and (min-width: 992px) {
    :root {
        --biggest-font-size: 4.5rem;
        --h1-font-size: 2.8rem;
        --h2-font-size: 2rem;
        --h3-font-size: 1.5rem;
        --normal-font-size: 1.1rem;
        --small-font-size: .95rem;
        --smaller-font-size: .85rem;
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: var(--header-height) 0 0 0;
    font-family: var(--body-font);
    font-size: var(--normal-font-size);
    background: var(--body-color);
    color: var(--text-color);
    line-height: 1.6; /* Improved readability */
}

h1, h2, h3, h4 {
    color: var(--title-color);
    font-family: var(--heading-font); /* Apply new heading font */
    font-weight: var(--font-bold); /* Make headings bolder */
    line-height: 1.2;
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block; /* Removes extra space below images */
}

button,
input,
textarea { /* Added textarea */
    border: none;
    outline: none;
    font-family: var(--body-font);
}

button {
    cursor: pointer;
    font-size: var(--normal-font-size);
}

/*=============== REUSABLE CSS CLASSES ===============*/
.section {
    padding: 5rem 0 2.5rem; /* Adjusted padding */
}

.section__title {
    font-size: var(--h2-font-size);
    margin-bottom: var(--mb-3); /* Increased margin */
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 2px; /* Add some flair */
}

/*=============== LAYOUT ===============*/
.container {
    max-width: 1024px; /* Slightly wider container */
    margin-left: var(--mb-1-5);
    margin-right: var(--mb-1-5);
}

.grid {
    display: grid;
    gap: 1.5rem; /* Default grid gap */
}

.main {
    overflow: hidden; /*For animation*/
}

/*=============== HEADER ===============*/
.header {
    width: 100%;
    background: var(--body-color);
    position: fixed;
    top: 0;
    left: 0;
    z-index: var(--z-fixed);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2); /* Add subtle shadow */
}

/*=============== NAV ===============*/
.nav {
    height: var(--header-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav__logo {
    display: flex;
    align-items: center;
    column-gap: .5rem;
    font-weight: var(--font-bold); /* Bolder logo */
    font-family: var(--heading-font);
    font-size: var(--h3-font-size); /* Larger logo text */
}

.nav__logo-icon { /* Added for logo icon */
    font-size: 1.5rem;
    color: var(--first-color);
}

.nav__link,
.nav__logo,
.nav__toggle,
.nav__close {
    color: var(--title-color);
}

.nav__toggle {
    font-size: 1.5rem; /* Larger toggle icon */
    cursor: pointer;
}

@media screen and (max-width: 767px) {
    .nav__menu {
        position: fixed;
        width: 100%;
        background: var(--container-color);
        top: -150%;
        left: 0;
        padding: 4rem 0; /* More padding */
        transition: .4s;
        z-index: var(--z-fixed);
        border-radius: 0 0 1.5rem 1.5rem;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3); /* Shadow for mobile menu */
    }
}

.nav__close {
    font-size: 2rem; /* Larger close icon */
    position: absolute;
    top: 1rem; /* Adjusted position */
    right: 1rem;
    cursor: pointer;
}

.nav__list {
    display: flex;
    flex-direction: column;
    align-items: center;
    row-gap: 2rem; /* Increased spacing */
}

.nav__link {
    text-transform: uppercase;
    font-weight: var(--font-semi-bold);
    transition: .3s;
    letter-spacing: 1px;
}

.nav__link:hover {
    color: var(--first-color); /* Hover color is accent */
}

/* Show menu */
.show-menu {
    top: 0;
}

/* Change background header */
.scroll-header {
    background: var(--container-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* Active link */
.active-link {
    position: relative;
    color: var(--first-color); /* Active link is accent color */
}

.active-link::before {
    content: '';
    position: absolute;
    bottom: -.5rem; /* Adjusted position */
    left: 50%;
    transform: translateX(-50%); /* Center the dot */
    width: 6px; /* Slightly larger dot */
    height: 6px;
    background-color: var(--first-color); /* Dot matches accent color */
    border-radius: 50%;
}

/*=============== HOME ===============*/
.home__content {
    row-gap: 2rem; /* Increased gap */
    padding-top: 3rem; /* Adjusted padding for mobile */
}

.home__group {
    display: grid;
    position: relative;
    padding-top: 3rem; /* More padding */
}

.home__img {
    width: 300px; /* Larger width for mobile */
    height: 300px; /* Larger height for mobile */
    border-radius: var(--border-radius-large); /* Rectangular with rounded corners */
    object-fit: cover;
    justify-self: center;
    /* Removed border and box-shadow related to circular glow */
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2); /* General shadow for a rectangular image */
}

.home__indicator {
    display: none; /* Hiding indicator for portfolio site, less relevant */
}

.home__details-img {
    display: none; /* Hiding details image */
}

.home__subtitle {
    font-size: var(--h3-font-size);
    text-transform: uppercase;
    margin-bottom: var(--mb-1);
    color: var(--first-color); /* Accent color for subtitle */
    font-weight: var(--font-semi-bold);
    letter-spacing: 1px;
    text-align: center; /* Center for mobile */
}

.home__title {
    font-size: var(--biggest-font-size);
    font-weight: var(--font-black);
    line-height: 1.1; /* Tighter line height for bold titles */
    margin-bottom: var(--mb-1-5); /* Increased margin */
    text-align: center; /* Center for mobile */
}

.home__description {
    margin-bottom: var(--mb-2); /* Increased margin */
    text-align: center; /* Center for mobile */
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.home__buttons {
    display: flex;
    flex-direction: column; /* Stack buttons on mobile */
    justify-content: center;
    align-items: center;
    gap: 1rem; /* Add gap for better spacing */
}

/*=============== BUTTONS ===============*/
.button {
    display: inline-block;
    background-color: var(--first-color);
    color: var(--title-color);
    padding: 1.1rem 2rem; /* Larger padding */
    border-radius: var(--border-radius-medium); /* Use variable */
    font-weight: var(--font-semi-bold);
    transition: all .3s ease; /* Smooth transition */
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2); /* Add shadow */
    width: max-content; /* Fit content for mobile buttons */
}

.button:hover {
    background-color: var(--first-color-alt);
    transform: translateY(-2px); /* Slight lift on hover */
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

.button__icon {
    font-size: 1.5rem; /* Larger icon */
}

.button--ghost {
    border: 2px solid var(--first-color); /* Ghost button accent border */
    background-color: transparent;
    border-radius: 3rem;
    padding: .9rem 1.8rem;
    color: var(--first-color);
    box-shadow: none; /* No shadow by default */
}

.button--ghost:hover {
    background: hsla(var(--primary-hue), 70%, 60%, 0.1); /* Subtle background on hover */
    color: var(--first-color);
    transform: translateY(-2px);
}

.button--link {
    color: var(--first-color); /* Link button is accent color */
    font-weight: var(--font-medium);
}

.button--flex {
    display: inline-flex;
    align-items: center;
    column-gap: .75rem; /* More gap */
}

/*=============== ABOUT ===============*/
.about__container {
    row-gap: 3rem; /* Increased gap */
    text-align: center;
}

.about__data {
    text-align: center;
}

.about__description {
    margin-bottom: var(--mb-2-5); /* Adjusted margin */
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.about__img {
    width: 250px; /* Adjusted image size */
    height: 250px;
    object-fit: cover;
    border-radius: var(--border-radius-large); /* Rounded corners for about image */
    justify-self: center;
    animation: floating 3s ease-in-out infinite; /* Slower animation */
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

/*=============== SKILLS ===============*/
.skills__container {
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); /* Responsive grid for skills */
    gap: 1.5rem;
    justify-items: center;
}

.skills__data {
    background: var(--container-color);
    padding: 1.5rem 1rem;
    border-radius: var(--border-radius-medium);
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
    transition: all .3s ease;
    width: 100%; /* Ensure cards take full width in their grid cell */
    max-width: 180px; /* Max width for skill cards */
}

.skills__data:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

.skills__icon {
    font-size: 3rem; /* Large icons */
    color: var(--first-color);
    margin-bottom: var(--mb-0-75);
}

.skills__name {
    font-size: var(--normal-font-size);
    color: var(--title-color);
    font-weight: var(--font-semi-bold);
}

/*=============== PORTFOLIO ===============*/
.portfolio__container {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); /* Responsive grid for projects */
    gap: 2rem;
    padding-top: 1.5rem;
}

.portfolio__content {
    position: relative;
    background: var(--container-color);
    border-radius: var(--border-radius-large);
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
    transition: all .3s ease;
}

.portfolio__content:hover {
    transform: translateY(-.75rem);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

.portfolio__img {
    width: 100%;
    height: 200px; /* Fixed height for project images */
    object-fit: cover; /* Ensure images cover the area */
    transition: transform .3s ease;
}

.portfolio__content:hover .portfolio__img {
    transform: scale(1.05);
}

.portfolio__data {
    padding: 1.5rem;
    text-align: center;
}

.portfolio__title {
    font-size: var(--h3-font-size);
    margin-bottom: var(--mb-0-5);
    color: var(--title-color);
}

.portfolio__description {
    font-size: var(--small-font-size);
    margin-bottom: var(--mb-1);
}

.portfolio__button {
    display: inline-flex;
    background-color: var(--first-color);
    color: var(--title-color);
    padding: .75rem 1.5rem;
    border-radius: var(--border-radius-medium);
    font-weight: var(--font-medium);
    transition: .3s;
}

.portfolio__button:hover {
    background-color: var(--first-color-alt);
}

/*=============== CONTACT ===============*/
.contact__container {
    row-gap: 2rem;
    text-align: center;
}

.contact__form {
    background: var(--container-color);
    padding: 2rem;
    border-radius: var(--border-radius-large);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
    max-width: 600px;
    margin: 0 auto;
    display: grid;
    gap: 1.5rem;
}

.contact__label {
    display: block;
    font-size: var(--small-font-size);
    color: var(--text-color-light);
    margin-bottom: var(--mb-0-25);
    text-align: left;
}

.contact__input,
.contact__textarea {
    width: 100%;
    padding: 1rem;
    background: hsl(240, 8%, 15%); /* Darker input background */
    border: 1px solid hsl(240, 8%, 25%);
    border-radius: var(--border-radius-medium);
    color: var(--title-color);
    font-size: var(--normal-font-size);
    transition: border-color .3s ease;
}

.contact__input:focus,
.contact__textarea:focus {
    border-color: var(--first-color);
}

.contact__textarea {
    resize: vertical;
    min-height: 100px;
}

.contact__button {
    width: max-content;
    margin-top: var(--mb-1);
    justify-self: center;
}

/*=============== FOOTER ===============*/
.footer {
    position: relative;
    overflow: hidden;
    padding-top: 4rem; /* More padding at top */
    background: hsl(240, 8%, 10%); /* Slightly darker footer background */
}

.footer__img-one,
.footer__img-two {
    position: absolute;
    transition: .4s ease; /* Slower transition */
    opacity: 0.7; /* Make them slightly transparent */
    display: none; /* Hiding these for a cleaner portfolio look */
}

.footer__container {
    row-gap: 3rem; /* Increased gap */
}

.footer__logo {
    display: flex;
    align-items: center;
    column-gap: .75rem; /* More gap */
    margin-bottom: var(--mb-1-5); /* Adjusted margin */
    font-weight: var(--font-bold);
    color: var(--title-color);
    font-size: var(--h3-font-size);
    justify-content: center; /* Center logo on mobile */
}

.footer__logo-icon { /* Added for logo icon */
    font-size: 1.8rem;
    color: var(--first-color);
}

.footer__description {
    margin-bottom: var(--mb-3); /* More margin */
    color: var(--text-color);
    text-align: center; /* Center description */
}

.footer__social {
    display: flex;
    column-gap: 1rem; /* More gap */
    justify-content: center; /* Center social links */
    margin-bottom: var(--mb-2);
}

.footer__social-link {
    display: inline-flex;
    background: var(--container-color);
    padding: .4rem; /* More padding */
    border-radius: var(--border-radius-small);
    color: var(--title-color);
    font-size: 1.2rem; /* Larger icon */
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: .3s ease;
}

.footer__social-link:hover {
    background: var(--first-color); /* Hover color is accent */
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.footer__title {
    font-size: var(--h3-font-size);
    margin-bottom: var(--mb-1-5);
    font-weight: var(--font-semi-bold);
    color: var(--title-color);
    text-align: center; /* Center footer titles */
}

.footer__links {
    display: grid;
    row-gap: .5rem; /* More gap */
    text-align: center; /* Center footer links */
}

.footer__link {
    font-size: var(--normal-font-size); /* Slightly larger link text */
    color: var(--text-color);
    transition: .3s;
}

.footer__link:hover {
    color: var(--first-color); /* Hover color is accent */
}

.footer__copy {
    display: block;
    text-align: center;
    font-size: var(--small-font-size);
    margin-top: 5rem; /* More space at the bottom */
    padding-bottom: 2rem;
    color: var(--text-color-light);
    border-top: 1px solid rgba(255, 255, 255, 0.1); /* Subtle separator */
    padding-top: 2rem;
}

/*=============== SCROLL UP ===============*/
.scrollup {
    position: fixed;
    background: var(--first-color); /* Scroll up matches accent */
    right: 1.5rem; /* Adjusted position */
    bottom: -25%; /* Hidden further down */
    display: inline-flex;
    padding: .5rem; /* More padding */
    border-radius: var(--border-radius-medium);
    z-index: var(--z-tooltip);
    opacity: 0.9;
    transition: .4s;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.scrollup__icon {
    font-size: 1.5rem; /* Larger icon */
    color: var(--title-color);
}

.scrollup:hover {
    background: var(--first-color-alt);
    opacity: 1;
    transform: translateY(-3px);
}

/* Show Scroll Up*/
.show-scroll {
    bottom: 4rem; /* Higher when shown */
}

/*=============== SCROLL BAR ===============*/
::-webkit-scrollbar {
    width: 0.7rem; /* Thicker scrollbar */
    background: hsl(240, 8%, 15%); /* Darker background */
}

::-webkit-scrollbar-thumb {
    background: hsl(240, 8%, 30%); /* Lighter thumb */
    border-radius: .5rem;
}

::-webkit-scrollbar-thumb:hover {
    background: hsl(240, 8%, 40%); /* Even lighter on hover */
}

/*=============== BREAKPOINTS ===============*/
/* For small devices */
@media screen and (max-width: 375px) {
    .container {
        margin-left: var(--mb-1);
        margin-right: var(--mb-1);
    }

    .home__img {
        width: 200px;
        height: 200px;
    }
    .home__buttons {
        flex-direction: column;
        width: max-content;
        row-gap: 1rem;
        margin: 0 auto; /* Center buttons */
    }

    .skills__container,
    .portfolio__container {
        grid-template-columns: 1fr; /* Single column for very small screens */
        justify-content: center;
    }
}

/* For medium devices */
@media screen and (min-width: 576px) {
    .about__container {
        grid-template-columns: .7fr;
        justify-content: center;
    }

    .contact__container {
        grid-template-columns: .7fr;
        justify-content: center;
    }
    .contact__form {
        padding: 2.5rem;
    }

    .skills__container {
        grid-template-columns: repeat(2, 1fr); /* Two columns */
    }

    .portfolio__container {
        grid-template-columns: repeat(2, 1fr); /* Two columns */
    }
}

@media screen and (min-width: 767px) {
    body {
        margin: 0;
    }

    .section {
        padding: 8rem 0 3rem; /* Increased section padding */
    }

    .nav {
        height: calc(var(--header-height) + 2rem); /* Taller nav */
    }
    .nav__close,
    .nav__toggle {
        display: none;
    }
    .nav__list {
        flex-direction: row;
        column-gap: 3.5rem; /* More spacing */
    }
    .nav__link {
        text-transform: initial;
        font-weight: var(--font-semi-bold);
    }

    .home__content {
        padding: 9rem 0 3rem; /* More padding */
        grid-template-columns: repeat(2, 1fr);
        gap: 5rem; /* Larger gap */
        align-items: center; /* Vertically align items */
        text-align: left; /* Align text left for desktop */
    }
    .home__img {
        height: 400px; /* Larger for desktop */
        width: 400px;
        order: 1; /* Image on the right */
        margin: 0; /* Remove auto margins */
    }
    .home__data { /* Added for text content */
        order: 0; /* Text on the left */
    }
    .home__subtitle,
    .home__title,
    .home__description {
        text-align: left; /* Align text left */
    }
    .home__buttons {
        flex-direction: row; /* Buttons in a row */
        justify-content: flex-start; /* Align buttons left */
        margin: 0;
    }

    .skills__container {
        grid-template-columns: repeat(3, 1fr); /* 3 columns */
    }

    .about__container {
        grid-template-columns: repeat(2, 1fr);
        align-items: center;
        column-gap: 6rem;
        text-align: left; /* Align text left for desktop */
    }
    .about__data {
        text-align: left;
    }
    .about__img {
        width: 320px; /* Larger image */
        height: 320px;
    }

    .portfolio__container {
        grid-template-columns: repeat(3, 1fr); /* 3 columns */
    }

    .contact__container {
        grid-template-columns: .6fr;
    }

    .footer__container {
        grid-template-columns: repeat(4, 1fr);
        justify-items: center;
        column-gap: 2rem;
        text-align: left; /* Align footer content left */
    }
    .footer__logo,
    .footer__description,
    .footer__social,
    .footer__title,
    .footer__links {
        text-align: left; /* Align footer content left */
        justify-content: flex-start; /* Align social links left */
    }
}

/* For large devices */
@media screen and (min-width: 992px) {
    .container {
        margin-left: auto;
        margin-right: auto;
    }

    .section__title {
        font-size: var(--h1-font-size);
        margin-bottom: 4rem; /* More margin */
    }

    .home__content {
        padding-top: 10rem;
        gap: 4rem;
    }
    .home__img {
        height: 550px; /* Even larger for large desktop */
        width: 550px;
    }
    .home__subtitle {
        font-size: var(--h2-font-size);
    }
    .home__title {
        font-size: var(--biggest-font-size);
    }
    .home__description {
        margin-bottom: var(--mb-3);
        padding-right: 3rem; /* More padding */
    }

    .skills__container {
        grid-template-columns: repeat(4, 1fr); /* 4 columns for larger screens */
    }

    .about__container {
        column-gap: 8rem;
    }
    .about__img {
        width: 400px; /* Larger about image */
        height: 400px;
    }
    .about__description {
        padding-right: 3rem;
    }

    .portfolio__container {
        grid-template-columns: repeat(3, 1fr); /* 3 columns */
        gap: 3rem;
    }

    .contact__container {
        grid-template-columns: .5fr;
    }

    .footer__copy {
        margin-top: 7rem;
    }
}

/*=============== KEYFRAMES ===============*/
@keyframes floating {
    0% { transform: translate(0, 0px); }
    50% { transform: translate(0, 20px); } /* More pronounced float */
    100% { transform: translate(0, -0px); }
}