@import url("https://fonts.googleapis.com/css2?family=Unbounded:wght@200..900&display=swap");

/*=============== VARIABLES CSS ===============*/
:root {
    --header-height: 2rem;
    --hue: 180;
    --first-color: hsl(var(--hue), 80%, 48%);
    --first-color-alt: hsl(var(--hue), 80%, 44%);
    --white-color: hsl(var(--hue), 8%, 92%);
    --black-color: hsl(var(--hue), 4%, 8%);
    --gray-color: hsl(var(--hue), 4%, 50%);
    --body-color: hsl(var(--hue), 8%, 8%);
    --container-color: hsl(var(--hue), 8%, 12%);

    --body-font: "Unbounded", sans-serif;
    --bigger-font-size: 2rem;
    --h1-font-size: 1.5rem;
    --h2-font-size: 1.25rem;
    --h3-font-size: 1rem;
    --normal-font-size: 0.938rem;
    --small-font-size: 0.813rem;

    --font-light: 300;
    --font-regular: 400;
    --font-medium: 500;
    --font-semi-bold: 600;

    --z-tooltip: 10;
    --z-fixed: 100;
}

@media screen and (min-width: 1150px) {
    :root {
        --bigger-font-size: 3rem;
        --h1-font-size: 2.25rem;
        --h2-font-size: 1.5rem;
        --h3-font-size: 1.25rem;
        --normal-font-size: 1rem;
        --small-font-size: 0.875rem;
    }
}

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

html {
    scroll-behavior: smooth;
}

body,
button,
input,
textarea {
    font: var(--font-light) var(--normal-font-size) var(--body-font);
}

body {
    background-color: var(--body-color);
    color: var(--white-color);
}

button {
    outline: none;
    border: none;
}

h1,
h2,
h3,
h4 {
    font-weight: var(--font-semi-bold);
}

ul {
    list-style: none;
}

a {
    text-decoration: none;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

/*=============== REUSABLE ===============*/
.container {
    max-width: 1120px;
    margin-inline: 1.5rem;
}

.grid {
    display: grid;
    gap: 1.5rem;
}

.section {
    padding-block: 3rem 1rem;
}

.section__title {
    text-align: center;
    font-size: var(--h1-font-size);
    color: var(--first-color);
    margin-bottom: 1.25rem;
}

/*=============== HEADER ===============*/
.header {
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    background-color: var(--body-color);
    z-index: var(--z-fixed);
    transition: box-shadow 0.4s;
}

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

.nav__logo {
    color: var(--white-color);
    font-weight: var(--font-semi-bold);
    transition: color 0.4s;
    font-size: 1rem;
}

.nav__logo:hover {
    color: var(--first-color);
}

.nav__back {
    display: flex;
    align-items: center;
    column-gap: 0.5rem;
    color: var(--white-color);
    font-size: 1rem;
    font-weight: var(--font-medium);
    transition: color 0.4s;
}

.nav__back i {
    font-size: 1.25rem;
}

.nav__back:hover {
    color: var(--first-color);
}

.shadow-header {
    box-shadow: 0 2px 16px hsla(0, 0%, 0%, 0.5);
}

/*=============== BUTTON ===============*/
.button {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    background-color: var(--first-color);
    color: var(--black-color);
    font-weight: var(--font-medium);
    font-family: var(--body-font);
    padding: 0.75rem 1.25rem;
    border-radius: 0.5rem;
    transition:
        box-shadow 0.4s,
        color 0.4s;
    cursor: pointer;
}

.button:hover {
    box-shadow: 0 8px 24px hsla(var(--hue), 80%, 48%, 0.3);
}

.button__ghost {
    background-color: var(--body-color);
    color: var(--white-color);
    border: 2px solid var(--first-color);
}

.button__ghost:hover {
    color: var(--first-color);
}

.button i {
    margin-right: 0.5rem;
}

/*=============== HERO SECTION ===============*/
.hero {
    padding-top: calc(var(--header-height) + 2rem);
    padding-bottom: 1.5rem;
    margin-top: 40px;
}

.hero__container {
    display: grid;
    row-gap: 1.5rem;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    column-gap: 0.5rem;
    background-color: hsla(var(--hue), 80%, 48%, 0.1);
    border: 1px solid hsla(var(--hue), 80%, 48%, 0.3);
    color: var(--first-color);
    font-size: var(--small-font-size);
    font-weight: var(--font-medium);
    padding: 0.35rem 0.75rem;
    border-radius: 2rem;
    width: fit-content;
}

.hero__badge i {
    font-size: 1rem;
}

.hero__title {
    font-size: var(--bigger-font-size);
    color: var(--first-color);
    line-height: 1.1;
    margin-block: 0.6rem 0.75rem;
}

.hero__description {
    color: var(--gray-color);
    line-height: 1.7;
    max-width: 600px;
}

.hero__buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.hero__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid hsla(var(--hue), 8%, 50%, 0.15);
}

.hero__meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.hero__meta-label {
    font-size: var(--small-font-size);
    color: var(--gray-color);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.hero__meta-value {
    font-size: var(--small-font-size);
    color: var(--white-color);
    font-weight: var(--font-medium);
}

.hero__meta-value--active {
    color: var(--first-color);
}

/*=============== MAIN SCREENSHOT ===============*/
.showcase {
    padding-block: 1rem 1.5rem;
}

.showcase__main {
    position: relative;
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid hsla(var(--hue), 80%, 48%, 0.2);
    box-shadow:
        0 0 60px hsla(var(--hue), 80%, 48%, 0.1),
        0 8px 32px hsla(0, 0%, 0%, 0.6);
    max-height: 520px;
}

.showcase__main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    display: block;
}

.showcase__main-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40%;
    background: linear-gradient(to top, var(--body-color), transparent);
    pointer-events: none;
}

/* Placeholder image styles */
.img-placeholder {
    width: 100%;
    background: var(--container-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    color: var(--gray-color);
    font-size: var(--small-font-size);
    border-radius: 1rem;
    min-height: 200px;
}

.img-placeholder i {
    font-size: 2.5rem;
    color: hsla(var(--hue), 80%, 48%, 0.4);
}

.img-placeholder span {
    font-size: var(--small-font-size);
    color: var(--gray-color);
}

/*=============== ABOUT SECTION ===============*/
.about-project {
    padding-block: 2rem 1.5rem;
}

.about-project__container {
    display: grid;
    row-gap: 1.5rem;
}

.about-project__top {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.about-project__text {
    display: grid;
    row-gap: 0.75rem;
}

.about-project__tech-block {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.about-project__subtitle {
    display: flex;
    align-items: center;
    column-gap: 0.5rem;
    font-size: var(--h3-font-size);
    color: var(--first-color);
    margin-bottom: 0.4rem;
}

.about-project__subtitle i {
    font-size: 1.5rem;
    font-weight: initial;
}

.about-project__paragraph {
    color: var(--gray-color);
    line-height: 1.7;
}

.about-project__paragraph strong {
    color: var(--white-color);
    font-weight: var(--font-medium);
}

.tech__list-spacing {
    margin-bottom: 0;
}

.about-project__features-block {
    display: grid;
    row-gap: 0.75rem;
}

.about-project__features-label {
    display: flex;
    align-items: center;
    column-gap: 0.5rem;
    font-size: var(--h3-font-size);
    color: var(--first-color);
    margin-bottom: 0.4rem;
}

.about-project__features-label i {
    font-size: 1.5rem;
    font-weight: initial;
}

/*=============== FEATURES ===============*/
.features__grid {
    display: grid;
    gap: 0.75rem;
    grid-template-columns: repeat(2, 1fr);
}

.feature__card {
    background-color: var(--container-color);
    border: 1px solid hsla(var(--hue), 8%, 50%, 0.1);
    border-radius: 0.75rem;
    padding: 1.25rem;
    display: grid;
    row-gap: 0.6rem;
    transition:
        border-color 0.4s,
        box-shadow 0.4s;
}

.feature__card:hover {
    border-color: hsla(var(--hue), 80%, 48%, 0.3);
    box-shadow: 0 4px 20px hsla(var(--hue), 80%, 48%, 0.1);
}

.feature__icon {
    width: 38px;
    height: 38px;
    background-color: hsla(var(--hue), 80%, 48%, 0.1);
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature__icon i {
    font-size: 1.1rem;
    color: var(--first-color);
}

.feature__title {
    font-size: var(--h3-font-size);
    font-weight: var(--font-semi-bold);
}

.feature__desc {
    font-size: var(--small-font-size);
    color: var(--gray-color);
    line-height: 1.6;
}

/*=============== TECH STACK ===============*/
.tech__list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tech__item {
    background-color: var(--first-color);
    padding: 0.4rem 0.7rem;
    border-radius: 2rem;
    color: var(--black-color);
    font-weight: var(--font-regular);
    font-size: var(--small-font-size);
    border: 2px solid var(--body-color);
    cursor: default;
    transition:
        background-color 0.4s,
        color 0.4s,
        border-color 0.4s;
}

.tech__item:hover {
    background-color: var(--body-color);
    color: var(--white-color);
    border-color: var(--first-color);
}

/*=============== SCREENSHOTS GRID ===============*/
.screenshots {
    padding-block: 2rem 3rem;
}

/* Theme Toggle */
.screenshots__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
    margin-bottom: 2rem;
    background: var(--container-color);
    border: 1px solid hsla(var(--hue), 8%, 50%, 0.15);
    border-radius: 3rem;
    padding: 0.3rem;
    width: fit-content;
    margin-inline: auto;
}

.toggle__btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    border-radius: 2.5rem;
    border: none;
    background: transparent;
    color: var(--gray-color);
    font-family: var(--body-font);
    font-size: var(--small-font-size);
    font-weight: var(--font-medium);
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
}

.toggle__btn i {
    font-size: 1rem;
}

.toggle__btn.active {
    background-color: hsla(var(--hue), 80%, 48%, 0.15);
    color: var(--first-color);
    border: 1px solid hsla(var(--hue), 80%, 48%, 0.3);
}

/* Screenshots panels */
.screenshots__panel {
    display: none;
}

.screenshots__panel.active {
    display: block;
}

.screenshots__grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(3, 1fr);
}

.screenshot__item {
    position: relative;
    border-radius: 0.75rem;
    overflow: hidden;
    border: 1px solid hsla(var(--hue), 8%, 50%, 0.1);
    transition:
        border-color 0.4s,
        box-shadow 0.4s,
        transform 0.4s;
    cursor: pointer;
}

.screenshot__item:hover {
    border-color: hsla(var(--hue), 80%, 48%, 0.3);
    box-shadow: 0 8px 32px hsla(var(--hue), 80%, 48%, 0.15);
    transform: translateY(-4px);
}

.screenshot__item img {
    width: 100%;
    height: auto;
    display: block;
}

.screenshot__caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top,
            hsla(var(--hue), 8%, 8%, 0.95),
            transparent);
    padding: 1.5rem 1rem 0.75rem;
    font-size: var(--small-font-size);
    color: var(--white-color);
    opacity: 0;
    transition: opacity 0.4s;
}

.screenshot__item:hover .screenshot__caption {
    opacity: 1;
}

/*=============== VIDEO SECTION ===============*/
.video-section {
    padding-block: 1.5rem 2rem;
}

.video-wrapper {
    position: relative;
    border-radius: 1rem;
    overflow: hidden;
    border: 1px solid hsla(var(--hue), 80%, 48%, 0.2);
    box-shadow: 0 0 60px hsla(var(--hue), 80%, 48%, 0.1);
    background: var(--container-color);
    max-width: 780px;
    margin-inline: auto;
}

.video-wrapper video,
.video-wrapper iframe {
    width: 100%;
    display: block;
    aspect-ratio: 16/9;
    border: none;
}

.video-placeholder {
    aspect-ratio: 16/9;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    background: var(--container-color);
    cursor: pointer;
    transition: background-color 0.4s;
}

.video-placeholder:hover {
    background-color: hsla(var(--hue), 8%, 15%, 1);
}

.video-play-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background-color: var(--first-color);
    display: flex;
    align-items: center;
    justify-content: center;
    transition:
        transform 0.4s,
        box-shadow 0.4s;
}

.video-play-btn i {
    font-size: 1.75rem;
    color: var(--black-color);
    margin-left: 0.2rem;
}

.video-placeholder:hover .video-play-btn {
    transform: scale(1.1);
    box-shadow: 0 0 40px hsla(var(--hue), 80%, 48%, 0.4);
}

.video-placeholder p {
    color: var(--gray-color);
    font-size: var(--small-font-size);
}

/*=============== BACK CTA ===============*/
.back-cta {
    padding-block: 3rem 4rem;
    text-align: center;
}

.back-cta__title {
    font-size: var(--h2-font-size);
    color: var(--white-color);
    margin-bottom: 0.5rem;
}

.back-cta__subtitle {
    color: var(--gray-color);
    font-size: var(--small-font-size);
    margin-bottom: 1.5rem;
}

.back-cta__buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

/*=============== FOOTER ===============*/
.footer {
    padding-block: 2rem 1.5rem;
    border-top: 1px solid hsla(var(--hue), 8%, 50%, 0.1);
}

.footer__container {
    display: grid;
    row-gap: 1rem;
    justify-items: center;
    text-align: center;
}

.footer__logo {
    color: var(--white-color);
    font-size: var(--h2-font-size);
    font-weight: var(--font-semi-bold);
    transition: color 0.4s;
}

.footer__logo:hover {
    color: var(--first-color);
}

.footer__copy {
    font-size: var(--small-font-size);
    color: var(--gray-color);
}

/*=============== SCROLLBAR ===============*/
::-webkit-scrollbar {
    width: 0.6rem;
    background-color: hsl(0, 0%, 15%);
    border-radius: 0.5rem;
}

::-webkit-scrollbar-thumb {
    background-color: hsl(0, 0%, 25%);
    border-radius: 0.5rem;
}

::-webkit-scrollbar-thumb:hover {
    background-color: hsl(0, 0%, 35%);
}

/*=============== SCROLL UP ===============*/
.scrollup {
    position: fixed;
    right: 1rem;
    bottom: -50%;
    background-color: var(--body-color);
    box-shadow: 0 4px 16px hsla(0, 0%, 0%, 0.5);
    display: inline-flex;
    padding: 6px;
    color: var(--white-color);
    font-size: 1.25rem;
    border-radius: 0.25rem;
    z-index: var(--z-tooltip);
    transition:
        bottom 0.4s,
        transform 0.4s;
}

.scrollup:hover {
    transform: translateY(-0.5rem);
}

.show-scroll {
    bottom: 3rem;
}

/*=============== LIGHTBOX ===============*/
.lightbox {
    position: fixed;
    inset: 0;
    background: hsla(0, 0%, 0%, 0.9);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.lightbox.active {
    opacity: 1;
    pointer-events: all;
}

.lightbox img {
    max-width: 100%;
    max-height: 90vh;
    border-radius: 0.5rem;
    box-shadow: 0 0 60px hsla(0, 0%, 0%, 0.8);
}

.lightbox__close {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    color: var(--white-color);
    font-size: 2rem;
    cursor: pointer;
    transition: color 0.3s;
}

.lightbox__close:hover {
    color: var(--first-color);
}

/*=============== LIGHTBOX NAV ===============*/
.lightbox__nav {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    background: hsla(var(--hue), 8%, 20%, 0.8);
    border: 1px solid hsla(var(--hue), 80%, 48%, 0.2);
    color: var(--white-color);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.5rem;
    transition: background-color 0.3s, border-color 0.3s;
    z-index: 201;
}

.lightbox__nav:hover {
    background: hsla(var(--hue), 80%, 48%, 0.2);
    border-color: var(--first-color);
    color: var(--first-color);
}

.lightbox__nav--prev { left: 1.5rem; }
.lightbox__nav--next { right: 1.5rem; }

.lightbox__counter {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    font-size: var(--small-font-size);
    color: var(--gray-color);
    z-index: 201;
}

/*=============== BREAKPOINTS ===============*/
@media screen and (min-width: 768px) {
    .about-project__top {
        grid-template-columns: 1fr 1fr;
        align-items: start;
    }

    .features__grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media screen and (min-width: 1150px) {
    .container {
        margin-inline: auto;
    }

    .section {
        padding-block: 3.5rem 1.5rem;
    }

    .section__title {
        margin-bottom: 1.5rem;
    }

    .nav {
        height: calc(var(--header-height) + 2rem);
    }

    .hero__container {
        grid-template-columns: 580px 1fr;
        column-gap: 5rem;
        align-items: center;
    }

    .scrollup {
        right: 3rem;
    }

    .footer__container {
        grid-template-columns: repeat(3, 1fr);
        align-items: center;
        text-align: left;
    }

    .footer__logo {
        justify-self: start;
    }

    .footer__copy {
        justify-self: end;
    }
}