/* ===================================
   SIDEBAR
   =================================== */

.sidebar {
    width: 380px;
    background: var(--white);
    border-left: 1px solid var(--border-color);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.sidebar-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-gray);
}

.tab-btn {
    flex: 1;
    padding: 1rem;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-gray);
    transition: all 0.2s;
    border-bottom: 2px solid transparent;
}

.tab-btn.active {
    color: var(--primary-color);
    background: var(--white);
    border-bottom-color: var(--accent-green);
}

.tab-content {
    display: none;
    padding: 1.5rem;
    flex: 1;
}

.tab-content.active {
    display: block;
}

/* ===================================
   FORMS
   =================================== */

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-dark);
}

.form-input,
.form-select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 0.9375rem;
    color: var(--text-dark);
    transition: border-color 0.2s;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent-green);
}

.btn {
    width: 100%;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: var(--secondary-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(45, 95, 93, 0.3);
}

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

.btn-danger:hover {
    background: #DC2626;
}

/* ===================================
   CATEGORIES MANAGEMENT
   =================================== */

.classes-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.class-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--bg-gray);
    border-radius: 8px;
    border-left: 4px solid;
}

.class-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.class-color {
    width: 24px;
    height: 24px;
    border-radius: 50%;
}

.class-name {
    font-weight: 500;
    color: var(--text-dark);
}

.btn-icon {
    padding: 0.5rem;
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--text-gray);
    transition: color 0.2s;
    font-size: 1.25rem;
}

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

.add-class-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
    background: var(--light-green);
    border-radius: 8px;
    margin-top: 1rem;
}

.color-picker-group {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 0.5rem;
}

.color-option {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
}

.color-option:hover {
    transform: scale(1.1);
}

.color-option.selected {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(45, 95, 93, 0.2);
}

/* ===================================
   TOAST NOTIFICATION
   =================================== */

.toast {
    position: fixed;
    top: 100px;
    right: 2rem;
    background: var(--white);
    padding: 1rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transform: translateX(400px);
    transition: transform 0.3s;
    z-index: 1000;
}

.toast.show {
    transform: translateX(0);
}

.toast-success {
    border-left: 4px solid var(--success);
}

.toast-error {
    border-left: 4px solid var(--danger);
}