:root {
    --primary-color-section-first: #252525;
    --primary-color-section-second: #292929;

    --text: #fff;
    --subtext: #bbb;
    --nav-menu: #303030;

    --cards-color: #373737;
    --future-cards-color: #303030;

    --button: #fff;
    --button-text: #000;
}

[data-theme="light"] {
    --primary-color-section-first: #ffffff;
    --primary-color-section-second: #f4f4f4;

    --text: #000;
    --subtext: #222;
    --nav-menu: rgba(255, 255, 255, 0.7);

    --cards-color: rgba(225, 225, 225, 0.7);
	--future-cards-color: rgba(240, 240, 240, 0.7);

    --button: #000;
    --button-text: #fff;
}

body {
    font-family: 'Inter', 'Segoe UI', Roboto, Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    color: var(--text);
    background-color: var(--primary-color-section-first);
}

.container {
    max-width: 1650px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
}

/* Header Section */

header {
    background-color: var(--nav-menu);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    position: sticky;
    top: 15px;
    z-index: 100;
    transition: all 0.2s ease;
    margin: 0 35px;
    border-radius: 50px;
    backdrop-filter: blur(20px);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    padding: 15px 50px;
}

.header-left {
    display: flex;
    align-items: center;
    position: relative;
    justify-content: space-between;
    gap: 5px;
}

.logo {
    position: relative;
    z-index: 1;
}

.logo img {
    width: 120px;
}

.logo-releases {
    margin-bottom: 25px;
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    transition: all 0.3s ease;
}

.logo-releases:hover {
    color: var(--subtext);
}

nav ul {
    display: flex;
    list-style: none;
    align-items: center;
    margin: 0;
    padding: 0;
}

nav ul li {
    margin-left: 25px;
    margin-right: 25px;
}

nav ul li a {
    text-decoration: none;
    color: var(--text);
    font-size: 18px;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: 10px 0;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--text);
    transition: all 0.3s ease;
}

nav ul li a:hover::after {
    width: 100%;
}

.buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
}

.btn {
    padding: 10px 15px;
    background-color: var(--button);
    color: var(--button-text);
    font-weight: 500;
    font-size: 14px;
    border: 1px solid transparent;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-3px);
}

/* Hero Section */

.hero {
    background: linear-gradient(135deg, var(--primary-color-section-first) 0%, var(--primary-color-section-second) 100%);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 1;
    padding: 0 200px;
}

.pc-logo {
    position: relative;
    max-width: 500px;
}

.mob-logo {
    position: relative;
    margin-left: auto;
    margin-right: auto;
    max-width: 500px;
    width: 0;
}

.hero-title {
    text-align: center;
    font-size: 84px;
    font-weight: 700;
    margin-bottom: 25px;
    letter-spacing: 15px;
    line-height: 1;
    margin-top: 0;
}

.hero-sub {
    font-size: 24px;
    font-weight: 500;
    color: var(--subtext);
    max-width: 500px;
    margin: 0 auto 30px;
}

.hero-footer {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.developer {
    display: flex;
    justify-content: space-between;
    align-items: end;
    gap: 10px;
    margin-top: 50px;
    font-size: 20px;
    font-weight: 500;
    letter-spacing: 1px;
    color: var(--white);
}

.dev-logo {
    max-width: 100%;
    width: 135px;
}

.start-btn {
    display: inline-block;
    background: #df2525;
    color: #eee;
    padding: 10px 20px;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    font-size: 20px;
    transition: all 0.3s ease;
    cursor: pointer;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.start-btn:hover {
    background: #ea2b2b;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 20px 30px rgba(0, 0, 0, 0.2);
}

/* Features Section */
.section-title {
    text-align: center;
    font-size: 48px;
    margin-top: -50px;
    margin-bottom: 75px;
    font-weight: 700;
    letter-spacing: 17px;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.features {
    padding: 100px 0;
    background-color: var(--primary-color-section-second);
    position: relative;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(650px, 1fr));
    gap: 75px;
}

.card {
    min-height: 200px;
    max-height: 250px;
    background-color: var(--cards-color);
    border: 3px solid var(--cards-color);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    border-radius: 25px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.5s ease;
    position: relative;
    cursor: pointer;
    z-index: 1;
}

.feat-card-title {
    text-align: center;
    font-size: 48px;
    transition: all 0.5s ease;
    padding-top: -25px;
}

.feat-card-aion {
    text-align: center;
    font-size: 28px;
    letter-spacing: 10px;
    transition: all 0.5s ease;
    color: var(--subtext);
    opacity: 1;
}

.card-content {
    font-size: 20px;
    transition: all 0.5s ease;
    transform: translateY(-115px);
    opacity: 0;
}

.card:hover {
    border: 3px solid var(--text);
    transform: scale(1.025);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.6);
}

.card:hover > .feat-card-title {
    font-size: 36px;
}

.card:hover > .feat-card-aion {
    transform: translateY(-25px);
    opacity: 0;
}

.card:hover > .card-content {
    transform: translateY(-35px);
    opacity: 1;
}

/* Try Aion Section */

/* Future Plans Section */
.future {
    padding: 100px 0;
    background-color: var(--primary-color-section-first);
    position: relative;
}

.future-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 1;
}

.future-card {
	cursor: pointer;
	max-width: 1000px;
	position: relative;
	margin-bottom: 75px;
	text-align: center;
	box-shadow: 0 15px 10px rgba(0, 0, 0, 0.1);
	border: 3px solid var(--future-cards-color);
	background-color: var(--future-cards-color);
	padding: 20px 125px;
	transition: all 0.6s ease;
	border-radius: 25px;
	font-weight: 100;
}

.future-card:hover {
	border: 3px solid var(--text);
}

.future-card-title {
	font-weight: 500;
	font-size: 52px;
	transition: all 0.6s ease;
	letter-spacing: 10px;
	margin-bottom: 15px;
}

.future-card:hover > .future-card-title {
	letter-spacing: 3px;
	font-size: 24px;
	opacity: 0.75;
}

.future-card-desc {
	transition: all 0.6s ease;
	font-size: 28px;
}

.future-card:hover > .future-card-desc {
	letter-spacing: 5px;
	font-size: 32px;
}

/* FAQ Section */

/* Footer */
footer {
    background-color: black;
    color: white;
    padding: 50px 0 25px;
    position: relative;
}

footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 50px;
    margin-bottom: 75px;
}

.footer-column {
    margin-bottom: 20px;
}

.footer-column p {
    font-size: 24px;
    margin-bottom: 25px;
    position:relative;
    padding-bottom: 10px;
    font-weight: 600;
    margin-top: 0;
}

.column-menu ul {
    display: flex;
    align-items: center;
    gap: 35px;
    list-style: none;
    padding: 0;
    margin: 0;
    max-width: 600px;
}

.round i {
    font-size: 32px;
}

.column-menu ul li {
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 18px;
    display: inline-block;
    cursor: pointer;
}

.column-menu ul li:hover {
    transform: translateY(-2px);
}

.developer {
    display: flex;
    justify-content: left;
    align-items: center;
    gap: 10px;
}

.footer-developer-logo {
    position: relative;
    width: 120px;
}

/* Adaptive */
@media (max-width: 1430px) {
	.card {
		padding: 30px 23px;
	}
	
	.card-grid {
		grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
		gap: 50px;
	}
}

@media (max-width: 1250px) {
	footer {
		padding: 50px 35px 25px;
	}
	
	.future-card-title {
		font-size: 46px;
	}
	
	.future {
		padding: 75px 75px;
	}
	
	.card:hover > .card-content {
		transform: translateY(-75px);
	}
	
	.card:hover > .feat-card-title {
		font-size: 32px;
		margin-bottom: 5px;
	}
	
	.card {
		max-height: 200px;
		padding: 20px 15px;
		margin-bottom: 10px;
	}
	
	.feat-card-aion {
		margin-top: 50px;
	}
	
	.card-content {
		font-size: 16px;
	}
	
	.feat-card-title {
		font-size: 30px;
		padding-top: 0px;
	}
	
	.features {
		padding: 75px 35px;
	}
	
	.card-grid {
		grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
		gap: 50px;
	}
	
	.start-btn {
		padding: 9px 17px;
	}
	
	.dev-logo {
		max-width: 100%;
		width: 120px;
	}
	
	.developer {
		margin-top: 40px;
	}
	
	.hero-content {
		padding: 0 150px;
		gap: 50px;
	}
	
	.hero-title {
		font-size: 70px;
	}
	
	.hero-sub {
		margin: 0 auto 25px;
	}
	
	.pc-logo {
		position: relative;
		max-width: 400px;
	}
}

@media (max-width: 1200px) {
    .container {
        max-width: 100%;
        padding: 10px 20px;
    }
}

@media (max-width: 1073px) {
	.column-menu ul {
		gap: 25px
	}
	
	.column-menu ul a {
		font-size: 14px;
	}
	
	.feat-card-title {
		font-size: 36px;
		padding-top: -5px;
	}
	
	.future-card-title {
		font-size: 40px;
	}
	
	.features {
		padding: 75px 125px;
	}
	
	.card {
		padding: 20px 10px;
	}
	
	.hero-sub {
		font-size: 20px
	}
	
	.hero-title {
		font-size: 50px;
	}
	
	.container {
		max-width: 1000px;
	}
	
	.pc-logo {
		position: relative;
		max-width: 350px;
	}
	
	.logo img {
		width: 100px;
	}
	
	nav ul li {
		margin-left: 15px;
		margin-right: 15px;
	}
}

@media (min-width: 906px) {
	#menuBtn {
		display: none;
	}
}

@media (max-width: 905px) {
	nav ul {
		display: none;
	}
	
	.btn {
		padding: 12px 25px;
		border-radius: 15px;
	}
}

@media (max-width: 575px) {
	#langBtn, #themeBtn {
		display: none
	}
}