/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    background-color: transparent;
    color: var(--color-text-main);
}

.btn i {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #fff;
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-surface-hover);
}

.btn-danger {
    background-color: var(--color-danger);
    color: white;
}

.btn-danger:hover {
    opacity: 0.9;
}

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    border: none;
    background: transparent;
    color: var(--color-text-main);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.icon-btn:hover {
    background-color: var(--color-surface-hover);
}

.btn-icon-text {
    width: 100%;
    justify-content: flex-start;
    padding: var(--space-2) var(--space-3);
}

.btn-icon-text:hover {
    background-color: var(--color-surface-hover);
}

/* Cards */
.card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    padding: var(--space-4);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3);
}

.card-title {
    font-size: 1.1rem;
    margin: 0;
}

/* Grids */
.grid {
    display: grid;
    gap: var(--space-4);
}

.grid-cols-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

/* Stats Card */
.stat-card {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background-color: var(--color-secondary);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon i {
    width: 24px;
    height: 24px;
}

.stat-details h3 {
    font-size: 1.5rem;
    margin-bottom: 0;
}

.stat-details p {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* Forms */
.form-group {
    margin-bottom: var(--space-3);
}

.form-label {
    display: block;
    margin-bottom: var(--space-1);
    font-weight: 500;
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-background);
    color: var(--color-text-main);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-secondary);
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    transform: scale(0.95);
    opacity: 0;
    transition: all var(--transition-normal);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
    opacity: 1;
}

.modal-header {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    padding: var(--space-4);
}

.modal-footer {
    padding: var(--space-4);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-2);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-6) var(--space-4);
    color: var(--color-text-muted);
}

.empty-state i {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-3);
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: var(--space-2);
    color: var(--color-text-main);
}