:root {
    --bg-color: #0d1117;
    --card-bg: rgba(22, 27, 34, 0.7);
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent-color: #7ee787;
    --accent-gradient: linear-gradient(135deg, #7ee787 0%, #2ea043 100%);
    --gemini-gradient: linear-gradient(90deg, #4b91f1, #9c67e8);
    --glass-border: 1px solid rgba(240, 246, 252, 0.1);
    --font-main: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-main);
    margin: 0;
    padding: 0;
    line-height: 1.6;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(75, 145, 241, 0.1) 0%, transparent 20%),
        radial-gradient(circle at 90% 80%, rgba(156, 103, 232, 0.1) 0%, transparent 20%);
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 4rem;
    animation: fadeIn Down 1s ease-out;
}

.cover-image-container {
    width: 100%;
    height: 400px;
    overflow: hidden;
    border-radius: 20px;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    border: var(--glass-border);
}

.cover-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.cover-image:hover {
    transform: scale(1.05);
}

h1 {
    font-size: 3rem;
    background: var(--gemini-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.meta {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

article {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 2.5rem;
    backdrop-filter: blur(10px);
    border: var(--glass-border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
    border-color: rgba(75, 145, 241, 0.3);
}

h2 {
    color: #fff;
    margin-top: 0;
    font-size: 1.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

h2::before {
    content: '';
    display: block;
    width: 8px;
    height: 30px;
    background: var(--gemini-gradient);
    border-radius: 4px;
}

p, li {
    font-size: 1.1rem;
    color: #c9d1d9;
}

ul {
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

.illustration {
    width: 100%;
    border-radius: 12px;
    margin: 1.5rem 0;
    border: var(--glass-border);
}

.mermaid-container {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: 16px;
    display: flex;
    justify-content: center;
    margin: 2rem 0;
    overflow-x: auto;
}

footer {
    text-align: center;
    margin-top: 5rem;
    padding: 2rem;
    color: var(--text-secondary);
    border-top: var(--glass-border);
}

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

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    .cover-image-container { height: 250px; }
    .card { padding: 1.5rem; }
}