:root {
    --bg-sidebar: #111827;
    --bg-main: #f9fafb;
    --border-color: #e5e7eb;
    --accent: #0ea5e9;
    --danger: #ef4444;
    --warning: #f59e0b;
}

body { font-family: 'Inter', sans-serif; }
* { transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, opacity 0.2s ease, transform 0.2s ease; }

.sidebar-link.active { background-color: var(--accent); color: white; }
.view { display: none; animation: fadeIn 0.5s ease-in-out; }
.view.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.btn { padding: 0.5rem 1rem; border-radius: 0.375rem; font-weight: 600; display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; }
.btn-primary { background-color: var(--accent); color: white; }
.btn-primary:hover { background-color: #0284c7; }
.btn-secondary { background-color: white; border: 1px solid var(--border-color); }
.btn-secondary:hover { background-color: #f9fafb; }

.input-styled { width: 100%; border: 1px solid var(--border-color); border-radius: 0.375rem; padding: 0.5rem 0.75rem; }
.input-styled:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 2px rgba(14, 165, 233, 0.2); }

.styled-table { width: 100%; border-collapse: collapse; }
.styled-table th, .styled-table td { padding: 0.75rem 1rem; text-align: left; }
.styled-table thead { border-bottom: 2px solid var(--border-color); }
.styled-table th { font-weight: 600; color: #6b7280; text-transform: uppercase; font-size: 0.75rem; }
.styled-table tbody tr { border-bottom: 1px solid var(--border-color); }
.styled-table tbody tr:hover { background-color: #f9fafb; }

.tab-button { padding: 0.5rem 1rem; border-bottom: 2px solid transparent; color: #6b7280; }
.tab-button.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }
.tab-content { display: none; }
.tab-content.active { display: block; }

#modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,0.5); z-index: 1000; display: none; justify-content: center; align-items: center; }
#modal-container { background-color: white; border-radius: 0.5rem; box-shadow: 0 10px 25px rgba(0,0,0,0.1); width: 90%; max-width: 500px; transform: scale(0.95); opacity: 0; }
#modal-overlay.active { display: flex; }
#modal-overlay.active #modal-container { transform: scale(1); opacity: 1; }

#toast-container { position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 2000; display: flex; flex-direction: column; gap: 0.75rem; }
.toast { padding: 1rem; border-radius: 0.5rem; color: white; box-shadow: 0 4px 12px rgba(0,0,0,0.15); display: flex; align-items: center; gap: 0.75rem; transform: translateX(120%); opacity: 0; animation: slideIn 0.5s forwards, slideOut 0.5s 4.5s forwards; }
@keyframes slideIn { to { transform: translateX(0); opacity: 1; } }
@keyframes slideOut { from { transform: translateX(0); opacity: 1; } to { transform: translateX(120%); opacity: 0; } }
.toast.success { background-color: #22c55e; }
.toast.error { background-color: #ef4444; }
.toast.info { background-color: #3b82f6; }

/* Mobile Sidebar */
@media (max-width: 768px) {
    #sidebar { position: fixed; height: 100%; z-index: 50; transform: translateX(-100%); }
    #sidebar.active { transform: translateX(0); }
    #mobile-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0,0,0,0.5); z-index: 40; display: none; }
    #mobile-overlay.active { display: block; }
}