/* Theme Toggle Button */
.btn-theme {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    width: 40px;
    height: 40px;
    border-radius: 50%; /* Circle */
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all 0.2s;
}

.btn-theme:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

/* Dark Mode Variables - The "Midnight" Palette */
[data-theme="dark"] {
    --bg-body: #0f172a;        /* Slate 900 */
    --bg-card: #1e293b;        /* Slate 800 */
    --bg-nav: rgba(15, 23, 42, 0.9);
    
    --text-main: #f8fafc;      /* Slate 50 */
    --text-muted: #94a3b8;     /* Slate 400 */
    --text-light: #64748b;     /* Slate 500 */
    
    --border: #334155;         /* Slate 700 */
    --border-hover: #475569;   /* Slate 600 */
    
    --shadow-sm: none;
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

/* Dark Mode Specific Tweaks */
[data-theme="dark"] .hero {
    background: linear-gradient(to bottom, #1e293b 0%, #0f172a 100%);
    border-bottom: 1px solid var(--border);
}

[data-theme="dark"] .pill-new {
    background: rgba(37, 99, 235, 0.2);
    border-color: rgba(37, 99, 235, 0.3);
    color: #60a5fa;
}

[data-theme="dark"] .search-bar,
[data-theme="dark"] .tag,
[data-theme="dark"] .sidebar ul li:hover,
[data-theme="dark"] .tool-card,
[data-theme="dark"] .sort,
[data-theme="dark"] .ad-spot,
[data-theme="dark"] .price-tag,
[data-theme="dark"] .btn-login,
[data-theme="dark"] footer,
[data-theme="dark"] .search-bar input {
    background: var(--bg-card);
    border-color: var(--border);
    color: var(--text-main);
}

[data-theme="dark"] .search-bar input:focus {
    border-color: var(--primary);
    background: var(--bg-body);
}

[data-theme="dark"] .tool-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    background: #273549; /* Slightly lighter on hover */
}

[data-theme="dark"] .sidebar ul li.active {
    background: rgba(37, 99, 235, 0.15);
    color: #60a5fa;
}

[data-theme="dark"] .card-bottom {
    border-top-color: var(--border);
}

[data-theme="dark"] .btn-visit {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
}
[data-theme="dark"] .btn-visit:hover {
    background: var(--primary);
    color: white;
}