/* Definim paleta pentru Dark Mode (Default) */
:root, html[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --accent-color: #3b82f6;
    --card-bg: #1e1e1e;
    --border-color: #333333;
}

/* Când schimbăm la Light Mode */
html[data-theme="light"] {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --accent-color: #2563eb;
    --card-bg: #f3f4f6;
    --border-color: #e5e7eb;
}

/* Reset de bază & Best Practices bune */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* Layout Simplu */
.site-header {
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}
.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.site-nav ul { display: flex; list-style: none; gap: 1rem; }
.site-nav a { color: var(--text-color); text-decoration: none; }
.site-nav .active a { color: var(--accent-color); font-weight: bold; }

.site-content { padding: 2rem 0; }

.site-footer {
    border-top: 1px solid var(--border-color);
    padding: 1rem 0;
    margin-top: 2rem;
    font-size: 0.9rem;
}