@import url("https://fonts.googleapis.com/css2?family=M+PLUS+Rounded+1c:wght@400;500;700;800&family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap");

:root {
    --bg: #111111;
    --fg: #f5f5f5;
    --line: #444444;
}

:root[data-theme="light"] {
    --bg: #fdfdfd;
    --fg: #111111;
    --line: #d0d0d0;
}

:root[data-theme="dark"] {
    --bg: #111111;
    --fg: #f5f5f5;
    --line: #444444;
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) {
        --bg: #fdfdfd;
        --fg: #111111;
        --line: #d0d0d0;
    }
}

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

body {
    font-family: "M PLUS Rounded 1c", sans-serif;
    background-color: var(--bg);
    color: var(--fg);
    line-height: 1.7;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    padding: 2rem;
    transition:
        background-color 0.3s,
        color 0.3s;
}

.container {
    width: 100%;
    max-width: 720px;
    display: flex;
    flex-direction: column;
    padding-top: 2rem;
}

/* Top Nav */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid var(--line);
    margin-bottom: 3rem;
}

.nav-container {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.brand {
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: opacity 0.2s ease;
}

.brand:hover {
    opacity: 0.7;
}

.logo-dark {
    display: block;
    height: 128px;
    width: auto;
}

.logo-light {
    display: none;
    height: 128px;
    width: auto;
}

:root[data-theme="light"] .logo-dark {
    display: none;
}

:root[data-theme="light"] .logo-light {
    display: block;
}

:root[data-theme="dark"] .logo-dark {
    display: block;
}

:root[data-theme="dark"] .logo-light {
    display: none;
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) .logo-dark {
        display: none;
    }

    :root:not([data-theme="dark"]) .logo-light {
        display: block;
    }
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-item {
    color: var(--fg);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    font-family: "Space Mono", monospace;
    position: relative;
    text-transform: lowercase;
}

.nav-item::after {
    content: "";
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: var(--fg);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.nav-item:hover::after,
.nav-item.active::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* Theme Toggle */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--line);
    color: var(--fg);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition:
        border-color 0.2s ease,
        transform 0.2s ease;
    flex-shrink: 0;
}

.theme-toggle:hover {
    border-color: var(--fg);
    transform: rotate(15deg);
}

.theme-toggle svg {
    width: 16px;
    height: 16px;
}

/* Main Content Area */
main {
    width: 100%;
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Typography & Content */

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
}

h2 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    margin-top: 2rem;
}

p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: var(--fg);
    opacity: 0.85;
}

/* Line Art Cards */
.card-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    margin-top: 3rem;
}

.card {
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 2.5rem;
    background-color: transparent;
    transition: border-color 0.3s ease;
}

.card:hover {
    border-color: var(--fg);
}

.tag {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    font-size: 0.8rem;
    font-family: "Space Mono", monospace;
    border: 1px solid var(--line);
    border-radius: 99px;
    margin-right: 0.5rem;
    margin-top: 1rem;
    color: var(--fg);
    text-transform: lowercase;
}

.star {
    width: 14px;
    height: 14px;
}

/* Mobile */
@media (max-width: 600px) {
    header {
        flex-direction: column;
        gap: 1.5rem;
        align-items: center;
        /* Center logo and content */
    }

    .nav-container {
        width: 100%;
        justify-content: center;
        gap: 2rem;
    }

    .nav-menu {
        width: auto;
        justify-content: center;
        gap: 1.5rem;
    }

    .card {
        padding: 1.5rem;
    }

    h1 {
        font-size: 2rem;
    }
}