:root {
    --bg-color: #fbf1c7;
    --text-color: #3c3836;
    --card-bg: #f9f5d7;
    --card-shadow: rgba(0, 0, 0, 0.1);
    --link-hover: #427b58;
    --accent: #b8bb26;
    --highlight: #fabd2f;
    --flower-filter: none;
}

[data-theme="dark"] {
    --bg-color: #282828;
    --text-color: #ebdbb2;
    --card-bg: #3c3836;
    --card-shadow: rgba(255, 255, 255, 0.05);
    --link-hover: #8ec07c;
    --accent: #b8bb26;
    --highlight: #fabd2f;
    --flower-filter: sepia(1) brightness(0.8) saturate(1.2);
}

* {
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.divider {
    border: none;
    height: 1px;
    background-color: var(--text-color);
    opacity: 0.2;
    margin: 1.5rem auto;
    width: 60%;
}

body {
    font-family: 'IBM Plex Mono', monospace;
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    opacity: 0;
    transition: opacity 0.4s ease;
}

body.fade-in {
    opacity: 1;
}

body.fade-out {
    opacity: 0;
}

.container {
    text-align: center;
    padding: 2rem;
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 0 12px var(--card-shadow);
    width: 90%;
    max-width: 500px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.subtitle {
    font-size: 1rem;
    color: var(--highlight);
    margin-bottom: 2rem;
}

.nav-links a {
    display: block;
    margin: 0.5rem 0;
    text-decoration: none;
    color: var(--text-color);
    font-size: 1.2rem;
    transition: color 0.2s ease;
}

.nav-links a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

.back-nav {
    margin-bottom: 2rem;
}

.back-nav a {
    color: var(--text-color);
    font-size: 1rem;
    text-decoration: none;
    border-bottom: 1px dashed var(--text-color);
    transition: color 0.2s ease, border-color 0.2s ease;
}

.back-nav a:hover {
    color: var(--link-hover);
    border-color: var(--link-hover);
}


.corner-flower-top,
.corner-flower-bot {
    position: absolute;
    width: 300px;
    height: 300px;
    background-image: url('flower.svg');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    z-index: 999;
    pointer-events: none;
    opacity: 0.9;
    filter: var(--flower-filter);
    transition: filter 0.3s ease;
}

.corner-flower-top {
    top: 5rem;
    right: 5rem;
}

.corner-flower-bot {
    bottom: 5rem;
    left: 5rem;
    transform: scaleX(-1);
}

.theme-toggle {
    margin-top: 2rem;
    font-size: 0.9rem;
    opacity: 0.7;
    color: var(--text-color);
}