:root {
    --hero-background-color: #000000;
    --background-color: #151515;
    --card-background-color: #222222;
    --text-color: #ededed;
    --accent-color: #007aff;

    font-family: "SF Pro Text", "SF Pro Icons", -apple-system, "Helvetica Neue", "Helvetica", "Arial", sans-serif;
    -moz-osx-font-smoothing: grayscale;
    -webkit-font-smoothing: antialiased;
    font-size: 100%;
}

html {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    height: 100vh;
    scroll-behavior: smooth;
    overflow-y: scroll;
}

body {
    background-color: var(--hero-background-color);
    color: var(--text-color);
    animation: fadeIn 0.8s ease-out forwards;
}

a {
    color: var(--text-color);
    text-decoration: none;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
}

button {
    cursor: pointer;
    padding: 1rem 2rem;
    border-radius: 999px;
    border: none;
    font-size: 110%;
}

button:hover {
    filter: brightness(1.3);
}

button[data-highlight] {
    background-color: var(--accent-color);
    color: var(--text-color);
}

::selection {
    background-color: var(--accent-color);
    color: var(--text-color);
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #111;
}

::-webkit-scrollbar-thumb {
    background: #444;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #666;
}

/************************************************/

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/************************************************/

.header {
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: row;
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    z-index: 100;
    height: 60px;
    align-items: center;
    justify-content: space-between;
    padding: 0 40vh;
    box-sizing: border-box;
}

.header__logo-container {
    display: flex;
    flex-direction: row;
    align-content: center;
    align-items: center;
    gap: 0.5rem;
}

.header__title {
    font-size: 1rem;
    font-weight: normal;
}

.header__nav {
    gap: 1rem;
}

.header__nav a.active {
    opacity: 0.5;
}

/************************************************/

.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    height: 100vh;
    width: 100%;
    gap: 1rem;
    background-color: var(--hero-background-color);
}

.hero__hook {
    font-size: 2rem;
}

.hero__logo-container {
    position: relative;
    display: inline-block;
}

.hero__logo-container::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 120%;
    height: 120%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.8) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    z-index: -1;
    filter: blur(40px);
}

.hero__title {
    font-size: 2rem;
}

.hero__description {
    font-size: 1rem;
}

/************************************************/

.features {
    min-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: radial-gradient(ellipse at 50% 0%, #1f1f1f 0%, var(--background-color) 70%);
    text-align: center;
    gap: 3rem;
}

.features__title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.features__list {
    list-style: none;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
}

.feature {
    background: rgba(34, 34, 34, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.18);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.26);
}