:root {
    --bg-color: #0d1117;
    --border-color: #21262d;
    --text-color: #8b949e;
    --text-light: #c9d1d9;
    --accent-blue: #54a0ff;
    --accent-purple: #dfb3ff;
    --code-bg: #161b22;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 3rem 2rem;
    display: flex;
    justify-content: center;
}

.wrapper {
    width: 100%;
    max-width: 750px;
}

.back-link {
    text-decoration: none;
    color: var(--text-color);
    font-size: 0.9rem;
    transition: color 0.2s;
    display: inline-block;
    margin-bottom: 2.5rem;
}
.back-link:hover { color: var(--accent-blue); }

header h1 {
    font-size: 1.6rem;
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: 0.3rem;
}

/* --- ΣΤΥΛ ΓΙΑ ΤΗ ΜΠΑΡΑ ΚΑΤΗΓΟΡΙΩΝ --- */
.tab-menu {
    display: flex;
    gap: 10px;
    margin: 2.5rem 0 1rem 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.tab-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 6px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.tab-btn:hover {
    color: var(--text-light);
    border-color: #444c56;
}

.tab-btn.active {
    background-color: rgba(84, 160, 255, 0.1);
    color: var(--accent-blue);
    border-color: var(--accent-blue);
}

/* --- ΜΗΧΑΝΙΣΜΟΣ ΕΜΦΑΝΙΣΗΣ/ΚΡΥΨΙΜΑΤΟΣ PANEL --- */
.tab-panel {
    display: none;
}

.tab-panel.active {
    display: block;
    animation: fadeIn 0.3s ease-in-out;
}

.crypto-section {
    border-bottom: 1px solid var(--border-color);
    padding: 1.8rem 0;
}
.crypto-section:last-of-type { border-bottom: none; }

.section-title {
    font-size: 1rem;
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: 0.8rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mini-copy {
    background: transparent;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-size: 0.8rem;
    padding: 2px 6px;
    transition: color 0.2s;
}
.mini-copy:hover { color: var(--accent-purple); }

pre {
    background-color: var(--code-bg);
    padding: 1.2rem;
    border-radius: 6px;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    color: #7ee787;
    margin: 0;
    overflow-x: auto;
    line-height: 1.5;
}

pre span.comment { color: #8b949e; font-style: italic; }
pre span.highlight { color: #ff7b72; font-weight: bold; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}