:root,
[data-theme="light"] {
    --bg-color: #f8f9fa;
    --bg-secondary-color: #ffffff;
    --text-color: #212529;
    --text-muted-color: #6c757d;
    --primary-color: #007bff;
    --primary-hover-color: #0056b3;
    --border-color: #dee2e6;
    --card-header-bg: #f7f7f9;
    --link-color: #007bff;
    --sidebar-bg: #343a40;
    --sidebar-text-color: rgba(255, 255, 255, 0.8);
    --sidebar-active-bg: #495057;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --bg-secondary-color: #1e1e1e;
    --text-color: #e0e0e0;
    --text-muted-color: #a0a0a0;
    --primary-color: #bb86fc;
    --primary-hover-color: #a16ef1;
    --border-color: #333333;
    --card-header-bg: #2a2a2a;
    --link-color: #bb86fc;
    --sidebar-bg: #1e1e1e;
    --sidebar-text-color: rgba(255, 255, 255, 0.8);
    --sidebar-active-bg: #333333;
}

/* THEME PRESETS SUPPLÉMENTAIRES */

[data-theme="neon"] {
    --bg-color: #0b0f19;
    --bg-secondary-color: #12182b;
    --text-color: #e6f0ff;
    --text-muted-color: #89a2c6;
    --primary-color: #7c3aed;
    --primary-hover-color: #9f67ff;
    --border-color: #1e2a44;
    --card-header-bg: #12182b;
    --link-color: #8b5cf6;
    --sidebar-bg: #0f1629;
    --sidebar-text-color: rgba(255,255,255,0.85);
    --sidebar-active-bg: #1b2743;
}

[data-theme="corporate"] {
    --bg-color: #f5f7fb;
    --bg-secondary-color: #ffffff;
    --text-color: #1e293b;
    --text-muted-color: #64748b;
    --primary-color: #0ea5e9;
    --primary-hover-color: #0284c7;
    --border-color: #e2e8f0;
    --card-header-bg: #f8fafc;
    --link-color: #0284c7;
    --sidebar-bg: #0f172a;
    --sidebar-text-color: rgba(255,255,255,0.85);
    --sidebar-active-bg: #1e293b;
}

[data-theme="fresh"] {
    --bg-color: #0f172a;
    --bg-secondary-color: #111827;
    --text-color: #e5f9f1;
    --text-muted-color: #9ae6b4;
    --primary-color: #10b981;
    --primary-hover-color: #059669;
    --border-color: #1f2937;
    --card-header-bg: #111827;
    --link-color: #34d399;
    --sidebar-bg: #0b1220;
    --sidebar-text-color: rgba(255,255,255,0.85);
    --sidebar-active-bg: #16324a;
}